Search magnet - Metals and their processing
Treasures, treasures, hiding places, jewelry These words reek of adventure, adventurism, and romance.
Who didn't dream of finding treasures as a child?
Some adults have kept their childhood dreams and are making them come true by engaging in treasure hunting.
Like all passionate people, amateur search engines have their own clubs and communities. There they exchange experiences, discuss search devices, and make collective forays.
Modern devices for detecting metals help treasure hunters. One such device is a search magnet. More about it below.
Design and types
A search magnet is capable of finding, capturing and lifting metal objects whose weight is much greater than the device itself by 50-100 times. The device is otherwise called an eternal or powerful magnet.
The working fluid consists of a neodymium magnet (contains Nd-Fe-B) enclosed in a glass-shaped turned steel body.
The body is coated with zinc, and the body is coated with nickel, which allows to be used for searching in water .
The housing protects and shapes the magnetic field in the correct direction. There are:
- Single-sided - convenient for searching from a boat, pier, bridge.
- Double-sided - have a universal purpose.
- Trawls are good for examining the bottom of reservoirs.
- Rods – for narrow and hard-to-reach places for conventional magnets.
They also differ in body diameter and magnetic strength .
A special bolt (eye bolt) is screwed into the top or side, intended for a cable or rope.
The second function of the bolt is that it is used to remove an object from a magnet.
To do this, the eye bolt is screwed completely into the body, after which the magnetized object can be removed.
Search magnets are most afraid of high temperatures (above +80); when exposed to strong heat, they lose their functions .
It is easy to work with: having attached it to a rope or cable, it is simply lowered into the desired place.
Objects containing ferromagnetic metals will be attracted to the device. Together with a magnet, they can be removed to the surface.
The fundamental difference is that a metal detector can only indicate the location of an object, while a magnet allows you to immediately “get” it. However, a magnet will not help when searching in the ground . Therefore, these two devices in the seeker’s arsenal are designed to complement each other, but not replace each other.
Other distinctive features:
- the magnet retains its functions in an aqueous environment ;
- no need to buy batteries or accumulators ;
- absence of sound signals that attract attention or “declassify” the seeker;
- do not take up much space, easy to take with you;
- objects are attracted on their own ;
- affordable price;
- resistant to damage;
- long service life, provided that the operating rules are followed - they lose one percent of their strength in a hundred years .
Where can it be used?
Used to search for objects outside the field of view :
- in caves;
- mountain failures;
- wells;
- sewers;
- bodies of water;
- swamps.
A magnet will be a good help during archaeological excavations and searches for wartime items.
Usually used in tandem with a metal detector. Using a magnet, excess, unnecessary metal is collected, but which will be “distracted” when searching with a metal detector. The metal detector then searches for more valuable alloys such as gold and silver.
Objects that are made of metals that have ferromagnetic properties can be attracted by such a magnet. For example, cast iron or nickel.
Ferromagnetic properties are properties of base metals that allow them to “stick” to magnets with great force.
The burning question is, is it possible to lift objects made of precious metals using a magnet?
It is possible if the composition contains metals that react to magnetic attraction.
There is no special search magnet for gold and silver .
However, it is quite possible to obtain jewelry and coins made of precious alloys with its help, because they also contain other elements that the magnet will attract.
For example: 585 standard gold consists of 58.5 percent of gold. The remaining 41.5 percent comes from other metals, including nickel.
Nickel is easily attracted to a magnet. However, in order for such jewelry to be lifted, there must be a touch to the jewelry find.
It's the same story with silver. If the alloy has ligatures (metals added to jewelry to increase wear resistance), objects or jewelry will be attracted.
Review of popular devices and their prices
China is considered the leader in production . Approximately 130 enterprises in China produce neodymium magnets.
These products are manufactured in Russia
- scientific and production company "Supersistema", Moscow;
- ZAO NPO REDMAG, Kaluga;
- LLC "Plastic" in St. Petersburg;
- LLC "Research and Production Company "Magnites and Systems", St. Petersburg;
- Nepra company, Moscow region, Zheleznodorozhny;
- NPO "ERGA" in Kaluga.
| Name | Diameter, mm | Height, mm | Breakout force, kg | price, rub. |
| Research and production company "Supersystem" | ||||
| F80 (single sided) | 48 | 10 | 80-90 | 690 |
| F150 (single-sided) | 68 | 15 | 170-190 | 1190 |
| F600 (single-sided) | 130 | 24 | 660-690 | 4290 |
| Double sided F150x2 | 68 | 24 | 170-190 on each side | 1940 |
| Double sided F600x2 | 130 | 39 | 660-690 each side | 7290 |
| JSC NPO REDMAG | ||||
| F300 | 94 | 28 | 600 | 3050 |
| F600 | 136 | 25 | 600 | 5450 |
| Made in China (according to information from the Polyus-magnet online store) | ||||
| F300 | 94 | 28 | 300 | 2750 |
| F400 | 116 | 20 | 400 | 3200 |
| F600 | 136 | 25 | 600 | 4900 |
As in any serious matter, caution is important :
- Ask the people you are going on search trips with to see if they have pacemakers . The device can disrupt the normal operation of the pacemaker.
- Credit cards with a magnetic stripe, mechanical watches, hearing aids and telephones should be kept away from the magnetic device.
Easy to use and maintain, affordable, these devices can help with:
- searching for gold and other precious metals;
- when digging non-ferrous metal and ferrous metal.
There are practically no restrictions on the place of application. At the same time, they are durable and do not lose their properties.
If the operating rules are followed, search magnets will help in searches for a long time.
Source: https://magnetline.ru/metally-i-splavy/poiskovyj-magnit.html
Search magnets for gold and silver: operating principle, review of models and prices
Treasures, treasures, hiding places, jewelry These words reek of adventure, adventurism, and romance.
Who didn't dream of finding treasures as a child?
Some adults have kept their childhood dreams and are making them come true by engaging in treasure hunting.
Like all passionate people, amateur search engines have their own clubs and communities. There they exchange experiences, discuss search devices, and make collective forays.
Modern devices for detecting metals help treasure hunters. One such device is a search magnet. More about it below.
Search magnet for gold and silver and its properties
Typically, powerful magnets are designed to find precious metals. A search magnet reacts to gold and silver quite strongly, and although it is difficult to find them in their pure form, its power is enough to pick up jewelry and coins from the ground. The main goal of all search engines is treasures, expensive coins, and sometimes just ferrous metal.
The article will describe the structure of the magnet and the basic principle of operation. He will also figure out what exactly can be found with its help and how to find expensive alloys. It will be explained in detail what ferromagnets, paramagnets and diamagnetic materials are. In addition, valuable tips and recommendations will be given that will greatly simplify the search for valuable items.
Search magnet device
This device consists of a steel case, inside of which there is a neodymium magnet. It is made from a rare alloy containing neodymium, iron and boron. This compound has a powerful attractive property. Despite its compactness, it is capable of holding things tens of times its own weight.
To make it easier to get various things, the case is equipped with a special mount. It is screwed into the magnet body via a thread. On top of the fastener there is a fastener in the form of a hook or loop that will hold the cable or rope. This mount has a rigid base that is firmly screwed into the body. The entire structure has a reliable foundation, and in this case, there is no fear in lifting any expensive and heavy thing.
Principle of operation
The search magnet has rather poor functionality. The main task of such an object is to attract as many metal objects as possible. But the device copes with its main task more than well. Thanks to its unique design, it has great strength and is able to hold quite large objects, as well as objects containing gold or silver, which ordinary magnets cannot handle.
This is especially convenient when getting things out of wells, funnels and various pits. It's also good to use this thing underwater. In water, all objects are subject to great resistance, and picking up any object becomes a rather labor-intensive task. But with a neodymium magnet, searching and removing such objects is greatly simplified.
What items can be found
When asked what kinds of things can be found using a search magnet, iron objects, including coins, immediately come to mind. Almost all paramagnetic metals can be found. Simply put, materials that are attracted to the magnet body, but more on that later. Such coins, or precious metals, can be of great value. For example, you can find iron coins from the period of Tsarist Russia, as well as many rare Soviet coins.
Powerful magnets can attract metals such as:
- aluminum
- copper
- tin
- brass
- lead
Most searches are carried out in attics, in various beaches and public places where people can lose things, as well as in wells and pits. In such places they usually find costume jewelry, expensive jewelry, various metal boxes, and sometimes even expensive mobile devices (on the beach). This is what finding things on land is all about.
As for water, you can also find many valuable things, including gold jewelry. Also, thanks to superstitions, a whole fortune of coins can be raised from the bottom. Moreover, there is no need to get coins from city fountains, since there are quite a lot of abandoned wells that no one needs, but they store precious things.
Does a magnet attract gold and silver?
Is it possible to find pure gold or silver with powerful magnets? No, since such metals are diamagnetic, that is, they are not attracted to magnets. But it's not all bad, thanks to all the power of neodymium alloy, it is possible to get some jewelry. Such objects usually have a ligature in them.
This alloy helps precious metals such as gold or silver acquire certain properties. For example, silver jewelry does not darken as much, but gold jewelry is more durable. But the most important thing is that the ligature allows magnetization and makes it possible to find various alloys.
But it is also possible to find pure gold or silver. At the beginning of the article it was said that iron boxes can be found. Typically, jewelry made of gold or silver is stored in such cases. So, walking through an attic or similar places, you can get rich, in the literal sense of the word.
Magnetic properties of various metals
In order to go hunting for valuable metals, you need to know what exactly will be attracted to a magnet. Since metals have different magnetic properties, and some do not have them at all. They can be divided into three groups:
-
ferromagnets
-
paramagnets
-
diamagnetic materials
Ferromagnets are metals with some of the best magnetic properties. Such metals are highly magnetic. These include ferrous metal.
Paramagnetic materials have the usual properties; they are readily attracted to a magnet, but do not have the function of magnetization. These include some alloys of jewelry and several types of non-ferrous metals.
And finally, diamagnetic materials. Such alloys are extremely difficult to respond to magnetic fields and greatly complicate the search for truly precious things. Diamagnets include gold, silver, aluminum, patina and other metals that even the strongest magnet does not pick up.
Is it possible to find gold with a magnet?
As already discussed earlier, jewelry and coins with gold can be lifted, but it is very problematic.
It is impossible to get pure gold with a magnet.
But if various factors are favorable, such as an iron box or paramagnetic jewelry lying nearby, then there is a chance to find it. Basically, only jewelry containing gold, such as bracelets, earrings and rings, can be caught with a magnet. The best places to search are sandy beaches, wells, and the sea or river bottom where a large number of people swim.
Source: http://lombardyinfo.ru/stati/poiskovyj-magnit.html
What can you find with a search magnet? Cop Secrets
First of all, these will be objects made of iron and cast iron. The water hides many historical monuments in its depths. Most often, weapons are raised from the bottom of reservoirs. Using a search magnet, you can easily pull out hidden treasures in wells and garbage pits, if they were placed in a metal box for better preservation.
Search magnets have proven themselves best in searching for items and artifacts from the First and Second World Wars. With the help of neodymium search magnets, Cossack sabers were repeatedly pulled out from the Dnieper, and many artifacts were recovered from Lake Ladoga. Absolutely all products made of iron or containing ferromagnetic metals are attracted by a neodymium magnet.
Search magnet design
The design of the search magnet is very simple and practical. In the middle there is a very brittle alloy of rare earth metals, boron and iron, which is enclosed in a stainless steel or aluminum housing, or perhaps simply a nickel coating of the magnet.
All free space is filled with epoxy resin, which is why it is not recommended to heat it above 60 degrees. A repair bolt is screwed into the magnet from above or on the side to attach a rope or cable. When attaching the repair bolt vertically, it is easier to tear the magnet off the surface.
Simply screw in this bolt using a lever, and the pin itself will tear the magnet off the surface.
Attention! When heated above 80 degrees, a neodymium magnet loses its properties.
Gold
First of all, all search engines are interested in gold. I’ll say right away: pure gold is not magnetic to a search magnet ! However, most jewelry has a ligature added to it. Alloys are metals that are added to gold to increase strength and resistance to mechanical and temperature influences.
For example, in the well-known 585 standard gold there is only 58.5% pure gold, and the rest - 41.5% - are other metals, one of which is nickel. It is precisely due to the nickel content that jewelry “clings” to a magnet. But you shouldn’t hope too much for this, since the nickel content is very small and jewelry is not strongly attracted to a neodymium magnet. To do this, you need to touch the magnetic surface directly to the jewelry.
Silver
The second important search metal is silver. Silver also has two varieties: which is magnetic and which is not magnetic))
It is worth noting that some antique silver services and sets of cutlery were sometimes made from silver, which is taken with a magnet (with the addition of a ligature).
Stainless steel
Stainless steel, depending on its alloys and impurities, is magnetic to varying degrees. There are only a few of its species that have very little contact. The rest of the part sticks quite well for the reason that it contains from 12 to 20% chromium. Not magnetic at all:
● Aluminum ● Brass and bronze ● Tin ● Lead
● Copper
Important! Neodymium search magnets are very resistant to corrosion. Particular attention should be paid to the protective coating. If the coating is damaged, it should be immediately restored using epoxy resin or paint. If a magnet begins to oxidize, its characteristics can drop by more than 10 times, that is, from 600 kg to 50!
We figured out what metals are attracted by a search magnet. However, we should not forget that during the Second World War, German soldiers always carried a sealed metal cylinder with them in which they kept their most valuable things. It is these cylinders that can be found with a search magnet.
Search magnets are divided into three groups according to their capabilities:
1. One-sided. Perfect for vertical search (from piers, bridges and boats).
2. Double-sided. Universal search magnets. Great for almost any conditions. The fact is that when moving a magnet along a silted bottom, a one-sided magnet with an unknown side goes along the bottom, but a double-sided one will capture objects from both the upper and lower planes.
3. Trawl magnets.
They are most suitable for guiding along the bottom. But you should take into account the fact that a magnet weighing over 1.5 kg will be difficult to carry around on an inflatable rubber boat using oars. Important! With strong impacts and slight deformations, magnets lose their properties. When identical magnets are connected, their attractive power does not double, as we would like, but only increases by 30%.
Advantages and Disadvantages of Very Powerful Search Magnets
Powerful (especially double-sided) magnets for searching, as is already clear from the above material, are much more interesting for searching. Their main advantage is power. Getting a more valuable find (especially if we talk about precious metals that are magnetic) with its help is much higher.
However, powerful magnets have their drawbacks :
1. A very powerful magnet (500 kg or more) will be difficult to throw over a long distance, since it weighs more than 4 kilograms.
2. The breaking load with high-quality engagement is much greater than the physical capabilities of a person.
3. The quality of the rope must be high and have a 2-fold safety margin. This is necessary in order to be able to pull out a snagged search magnet from a flooded tree or crevice.
4. Carrying a heavy object for a long time is very tiring.
According to the type of fastening, repair bolts are divided into two types: with vertical fastening and lateral fastening.
For moderate results, a double-sided magnet with an attractive force of 140-200 kg and a lateral fastening of a repair bolt is sufficient. It is quite possible to carry such a magnet all day, although it is possible that the next day you will feel a slight pain in your muscles (without special preparation).
Using search magnets when searching with a metal detector
Many people use metal detectors, but less than half use a pinpointer. Everyone is familiar with the situation when there is a clear signal from the excavated soil, but the target is not visible. You can even move a pinpointer along the ground, hear the target, and find nothing. A neodymium magnet for searching is a great help here: if the target is magnetic, it will instantly stick to the surface. For such cases, using a magnet of 40-80 kg is sufficient.
Attention! It is very convenient to use a fabric bag. Metal debris, of which there is a lot in the ground, does not stick to the magnet. The fabric will also save you from mechanical damage and eliminate the possibility of dangerous corrosion.
Clear advantages of neodymium magnets compared to a pinpointer:
1. Their batteries don’t run out, and you don’t forget to turn them off all the time 2. Quiet (in cases where you don’t want to advertise your presence) 3. Small dimensions. Convenient transportation. You can simply carry it in your pocket. 4. The target itself clings to the surface. 5. Price. You can buy 5 magnets for the price of one pinpointer. 6. Resistance to mechanical damage and moisture.
7. Long service life if basic rules are observed.
Important! Neodymium search magnets lose magnetization approximately 0.1% to 2% per 10 years! Then it’s up to you to decide which search magnet to choose; we can only recommend a proven brand that does not deceive with the declared power - “World of Magnets” (see the brand in the description of the magnet).
Search for valuable coins
The list of coins that can be found using a search magnet is quite impressive. Cheap royal change is not accepted for magnetism, but medium denomination coins were made with the addition of nickel and chromium, which immediately indicates the magnetic properties of these coins. The most expensive large denomination coins, made of gold and silver, cannot be lifted using a search magnet; they interact with the magnet, but very, very weakly.
How to distinguish a counterfeit coin from an original using a search magnet
To do this, you need to place a neodymium magnet at an angle of 45 degrees, attach the original coin (which you are completely confident in) to its surface and release it. At the same time, it should smoothly go down. The fake, unlike the original, will go down very quickly. This applies to almost all coins that are not picked up by a magnet.
Important! When checking, it is better to use cellophane or polyethylene to cover the magnet, because coins in exceptional collectible condition have a chance of being damaged.
Purchasing a neodymium magnet is a good investment
The main problem with search magnets is the price, which has skyrocketed since 2009: 95% of rare earth metals are extracted and processed in the Middle Kingdom, and they are used for automotive production. This country has introduced additional duties on the export of magnets from its territory. Throughout 2011, neodymium increased in price 5 times! Neodymium on exchanges has risen in price by no less than 50% in just 2017!
Source: https://md-arena.com/chto-mozhno-najti-poiskovym-magnitom-sekrety-kopa/
What metals does a neodymium magnet attract?
Only steels have magnetic properties , and not all of them. For example, austenitic stainless steels do not attract magnets because they do not have ferromagnetic properties. However, there are a sufficient number of enthusiasts who believe that magnetic waves are emitted by any metal, and therefore there should be a search magnet for gold and silver, and for some this expression is quite normal for perception and practical use.
ATTENTION! MAGNETS FOR SEARCHING GOLD, COPPER, SILVER DO NOT EXIST!
THEY SIMPLY ARE NOT - ANYWHERE!
In our article we describe the theory of how non-ferrous and precious metals can be detected using magnetic fields. This article is our fantasy, supported by scientific developments of foreign scientists.
See also the article - Extraction of scrap metal from water (about ferrous metal and search magnet).
Device for adjusting the magnetic field from metal objects
Strictly speaking, this is not a magnet, but rather an electromagnet, with the help of which you can initiate and configure any magnetic radiation, even quite weak ones, to be captured by appropriate devices. It is not easy to build such a device, but the authors, citizens of Australia, have no doubt about its effectiveness.
That's why they patented their invention in their patent office. Based on the fact that Australian soil is not much different from domestic soil, we will give a description of the device and operating principle of such a magnet for gold and silver.
Although it is necessary to repeat - in the generally accepted sense, this design has nothing .
The operation of the device is based on the well-known physical fact that when any object that generates magnetic oscillations in an alternating electric field moves, changes occur inside the trapper circuit associated with the movement of atoms around the nucleus.
If the area of electric field generation is sequentially moved along or across the magnetic field from a metal object, changes will occur in this area, the intensity of which determines the degree and strength of the interaction of two fields - magnetic and electric.
The difficulty is that strong magnetic fields are not created by noble metals . It is known, for example, that, according to the principle of decreasing, the electrochemical potentials of non-ferrous metals are located as follows (we consider only the area of interest to us): copper → mercury → silver → palladium → platinum → gold.
Thus, if the expression “is copper attracted to a magnet” may still have some basis, then the phrase “magnet for gold” does not make any sense at all.
It is more correct to talk about an electromagnetic trap, which will record the fact of a coordinated change in electric and magnetic fields in a certain, rather local, metallic volume.
— how copper interacts with a magnet:
Recording of changes that occur in the apparatus under the influence of such fields is captured by the measuring circuit. It is a highly sensitive spring made of rhenium, a rare metal that is absolutely insensitive to temperature changes. The rhenium spring must be adjusted to operate.
The process is to set the conditional zero of the device, for which it is placed as far as possible from all metal objects. In urban areas, such a “search magnet for gold, silver and other precious metals” will not work. However, search engines are much more likely to look for gold, platinum, copper, silver, etc.
in old abandoned rural estates
With any movement of the device, a similar action occurs with the electric field, while the magnetic field remains constant in coordinates. Therefore, the resulting movement of the spring will also be different.
Where it turns out to be most intense, its source is almost certainly located - the magnetic field. Another thing is that this kind of search magnet for non-ferrous metals will not be able to show which metal is hidden under the thickness of wood or earth.
But the device will definitely show that there is metal there.
Any metal can be detected by a magnetic field
The principle of operation of such a pseudo-magnet is similar to the coils of a metal detector, with the only difference being that the “magnet” will be tuned to only 1 metal and this is in theory - but we don’t know how it will behave in practice, BUT, most likely, it’s cheaper, faster and simpler will use an ordinary metal detector to search for non-ferrous metals, since not a single wizard has yet invented a magnet for non-ferrous and precious metals, maybe because there are no wizards!
How to assemble and set up
It will be very difficult to find/buy a rhenium spring, but all other parts of the device are quite accessible for making yourself. The sequence is:
- A steel axle is made from a thin-walled steel pipe with a diameter of no more than 16 mm. Its length should not be less than three diameters, otherwise the change in the magnetic field cannot be detected.
- A frame is made from thin copper or brass wire. The authors do not describe its dimensions, but, based on the dimensions of the tubular axis, it should be at least 200x200 mm. The frame must be sufficiently rigid.
- Three (as many as possible) holes are drilled in the tubular axle at equal distances, in which the wooden axles are placed.
- Thin-walled wooden disks are made, the number of which must correspond to the number of holes drilled in the axle. Obviously, discs can also be made of plywood: what matters is the mass of the disc and its absolute immunity to magnetic fields.
- The central sectors of each disk are covered with metal foil made of the metal that will be searched. Thus, a search magnet for non-ferrous metals - copper, gold and silver (platinum is searched for much less frequently) should have three sets of replaceable wooden disks.
- The frame with disks must be able to move freely along the entire tubular axis with fixation in a certain place. If the fits of the mating parts are made with the required accuracy, then there should be no swaying of the frame when it moves.
- To create a magnetic trap, plates from an old transformer are used, which are packed into the frame outline. The distance between adjacent plates should not exceed 1.5 mm in thickness and 56 mm in length. Such plates form the screen of the device that perceives magnetic radiation.
- Next, assemble the magnetic coil. You will need a solenoid made of 600 layers of enameled wire, which is connected to an alternating current voltage source. The winding should be multilayer, this will reduce the parasitic capacitance of the coil and make the device less inertial.
- A ferromagnetic or - which is better - a ferroelectric core is inserted inside the coil.
- By connecting this structure through a step-down transformer, a constant position of the frame with the plates is achieved relative to the wooden disks. This will be the conditional zero of the search “magnet” for non-ferrous metals.
The easiest way to check whether a search “magnet” attracts gold and silver is on a real object made of these metals. At the same time, it will be possible to establish the practical sensitivity of the device.
about how a search magnet does NOT magnetize gold, silver and other coins
Source: http://ooo-asteko.ru/kakie-metally-prityagivaet-neodimovyy-magnit/
Types and uses of search magnets for gold and silver – Glitter Gem
Many companies offer to buy a search magnet for gold and silver. Every person at least once in his life dreamed of finding a treasure. We need to figure out whether it is possible to attract precious metals to a regular magnet?
Magnetic field and metals that conduct it
At the macroscopic level, under the influence of a magnetic field, some substances can be attracted. This also applies to metals and alloys. When hanging a new magnet on the refrigerator, many people don’t even think about why it doesn’t fall off.
The most attracted metal is iron, which is used in alloy with other metals in the production of refrigerators. Now try attaching a gold ring or chain to this magnet. In this case, the gold product will not hold up.
If you perform this trick with a silver item, you will get a similar result. Gold reacts worse to a search magnet than silver, since the latter contains more impurities.
The things that we used to call gold and silver are not actually made of mono-metal, they are alloys. They could “stick” to the magnet if it were larger, more powerful, if the alloy contained a pronounced metal that could be quickly attracted. To do this, consider the types of interaction of substances with a magnetic field.
Here are the main ones:
- Ferromagnets – strongly attracted (for example, iron, steel, nickel);
- Paramagnetic materials are weakly attracted (for example, platinum, aluminum, magnesium, oxygen). This effect can only be detected using special equipment.
- Diamagnets - magnetized against the direction of the external magnetic field and repelled by the magnet (for example, plastics, gold, silver, copper, water, carbon).
Having bought an ordinary magnet, you will only attract ferromagnets; in this case, you will have to forget about a treasure of gold. If you are determined to look only for products made of gold and silver, it is better for you to purchase a metal detector.
It works on a different principle: it does not attract metals, but makes sounds when searching for them. Then all you have to do is dig in the right place.
Decide what to buy so as not to throw money away and not be disappointed with the purchase.
Search magnets
To lift ferromagnetic metals and alloys from the bottom of rivers, ponds and wells, magnets F 200 – F 400 are used (depending on the difficulty of access and the size of the load).
Even if they are the same size, the tearing force can be different, it depends on the content of neodymium (a chemical element). The more neodymium, the more powerful the magnet. For one person, a model with a diameter of up to 1 m and a lifting force of up to 300 kg will be optimal.
It is important to know that flat objects attract better than round ones.
Safety precautions or what to be careful with
When using a magnet, you must adhere to certain rules:
- Neodymium should not be heated above 80°C.
- The magnet affects the magnetic fields of electrical devices, pacemakers, watches, credit cards.
- The large device is stored and transported in a non-magnetic, for example, plastic container.
- You cannot stand between a large magnet and an iron barrel/door, etc., it will be attracted, and a fracture of an arm/leg or other part of the body may occur.
- Wipe the device after each use, clean it from dirt, do not leave it without a case, and it will serve you for many years, since the device does not break down and does not require repair!
Have an easy search, precious finds and more gold!
Source: https://kabirski-store.ru/osobennosti/vidy-i-primenenie-poiskovogo-magnita-dlya-zolota-i-serebra.html
How to choose the right search magnet - an objective rating of the best search magnets for any purpose
The search magnet is a round device with a steel body equipped with a neodymium core of varying power. It is used for “fishing” for scrap metal, silver, gold items and jewelry. There are many types of units, each of which differs in power, weight and design.
How to choose a search magnet
Search magnets differ in design, use cases, weight, power and size. Such diversity takes a beginner by surprise. Techniques and life hacks for successful “magnetic fishing” will help you choose a search magnet.
Single sided or double sided
There are two main types of search magnets used in different directions. The choice depends on the conditions of use, so before you buy a single-sided or double-sided unit, it is important to compare their advantages and disadvantages:
| Characteristic | Single sided magnet | Double sided magnet |
| Grip on object | The find is magnetized at the end, so even when working on a rocky bottom, the likelihood of unhooking is low. | Thanks to two working surfaces, it easily attracts an object, but is more likely to be lost when colliding with an obstacle. |
| Terms of Use | The unit is perfect for “vertical fishing”. It is more convenient to search while in a boat or on a bridge. The magnet enters perpendicularly into the water without turning over. | A universal magnet with a double surface that can be used in any environment. It will attract objects, even upside down. |
| Weight | The lightweight device is great for long searches. | A double-sided magnet is a third heavier than a single-sided one, which leads to rapid fatigue of the search engine. |
| Design | It has one eye-bolt fastening and a single working surface. | Equipped with two surfaces and fastenings. |
What weight of search magnet to choose
The average weight of search magnets is 0.2-4 kg. In your arsenal you need to have a unit with a force of attraction of at least 100-200 kg. By purchasing such a device, a search engine will be able to lift a flat metal plate with a smooth and clean surface or small objects from the bottom. In real conditions, fouling with silt, algae, and current weakens the effect of the magnet. As a result, it turns out that having an attractive force of 100 kg, the structure will overpower an object weighing no more than 7-10 kg.
Based on reviews from owners, it is better to choose a magnet with more powerful characteristics - 200-400 kg. They will magnetize interesting things, bypassing priceless pieces of hardware.
You can also buy a magnet for searching in water to make money, but in this case you will need a power in the range of 600-800 kg. Despite their modest weight, they are able to overcome mountains of metal. With their help you can find bicycles, motorcycles and remains of cars.
Table of sizes and main characteristics of search magnets
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Objective rating of search magnets
At the moment, the absolute market leaders are:
- Forceberg F-200 . A model that rightfully tops the list of the best search magnets due to its characteristics. Despite its modest dimensions, it provides traction of 220 kg. And two eye bolts are used to separate the magnet from the find and make searching easier. Wear less than 1% in 10 years.
- Redmag F-200 . The modification is famous for its compliance with the specified power declared by the manufacturer. The maximum tensile strength of the presented model is 200-225 kg. An improved design made of metal and neodymium, with the addition of iron and boron impurities, strengthens the assembly several times, giving it additional strength. Used to extract scrap metal from water, soil and even construction waste
- F-300 Superpower . The model is designed to search for steel objects and scrap metal. In calm conditions (in the absence of current), the unit is capable of pulling about 200 kg, in other cases the figure decreases several times. The device weighs 1.9 kg. This modification is perfect for beginner search engines.
- Nepra F-200 . Improved unit with additional corrosion protection. Nickel plating and galvanizing of the cup extend the life of the magnet, protecting it from rust. The maximum adhesion force is 200 kg, it is achieved only in ideal conditions, and decreases when immersed in a body of water. Among the disadvantages, in comparison with competitors, we can highlight the rate of loss of attractive forces - over 2% over 10 years.
You need to select and buy a magnet based on the specific application. For beginner searchers, a basic lightweight model with a low attractive force is suitable. More experienced fishermen should pay attention to the updated modification for retrieving large finds.
What can you catch?
Fragments of historical monuments - knives, weapons from the times of the Great Patriotic War - are often recovered from the bottom of lakes and rivers. A magnet with good attractive force will pull out hidden treasures in wells and garbage pits. Cossack sabers were repeatedly raised from the Dnieper. All products containing iron and ferromagnetic metals will be attracted to the magnet.
Pure gold is not magnetized, but such jewelry also contains a ligature (a mixture to impart strength). For example, products of 585 standard contain 41.5% other metals, including nickel, which is highly attractive.
You can also find silver, but not all its varieties can be raised. Sets of past centuries, with the addition of ligature, are often mined from the depths of centuries-old lakes.
Stainless steel is magnetic to varying degrees, depending on the alloys added. Aluminum, brass, bronze, tin, lead and copper will not be attracted.
Often in your finds you can find metal sealed cylinders worn by German soldiers. They kept their valuables in them.
Places to find relics
Ideal search places are military crossings and centuries-old bridges. Valuable finds can be discovered when examining mill whirlpools and pre-revolutionary wells. The drains, cesspools and station toilets surprise you with their artifacts.
Search Magnet Care
To use a search magnet for a long time, it is important to properly care for it. There are no special requirements for processing the coating, but you need to wipe it with a dry cloth and clean it of small adhering metal particles.
The magnet is a fairly reliable tool; its service life depends on the characteristics of its use. Over a decade, it loses no more than 1% of power.
Do not hit or heat the device. When exposed to temperatures above 80 °C, it will lose its magnetic properties and turn into a useless piece of metal.
Important! The design negatively affects the operation of electronics; the damage radius depends on the power. When searching for artifacts, you should keep smartphones and laptops at a safe distance, and it is better to store search magnets in special bags (more details below).
Demagnetization of search magnets
Even the most powerful magnets lose their properties over time. Ferrite products will last for several decades, but neodymium products will last 200-300 years.
Causes of involuntary demagnetization:
- Heat. When heated above 80 ⁰C, the magnet will completely lose its attractive force. Only some models have increased resistance to temperature changes and can withstand up to 200 ⁰C.
- Strong blows. Mechanical impacts on a magnet (impact, falling from a height) deprive it of its value.
- Errors when cutting and drilling. Strong pressure when processing a magnet with a grinder can lead to loss of characteristics.
- Impact of external factors. When exposed to a magnetic field with an induction of about 3-4 Tesla, the magnet can be demagnetized.
It will be possible to restore the lost properties only in large-scale production using an industrial magnetization installation.
Accessories for search magnets
Thanks to proper use, transportation and storage, the search magnet will last a long time and will not lose its properties ahead of schedule. Accessories protect the unit from environmental influences and ensure efficient use and transportation.
Ropes for search magnets
Chinese cord and clothesline are the first step to failure. They only look very strong, but in practice they will break during the first dive. An “accident” will happen even if the object is too heavy or simply caught on a snag.
In order not to lose the magnet on your first “fishing”, you need to use a very strong rope. When choosing, it is important to consider its characteristics. For example, if the search involves a magnet capable of pulling out an object weighing 400 kg, then the breaking capacity of the cord should be no less. Particular attention should be paid to the diameter; it should be at least 0.4-0.5 cm. But the length depends on the scale of the search; rope of 10-15 meters is in great demand.
Ways to bind a search magnet
The main secret of success is proper lacing. Initially, you need to tie the magnet with a constrictor knot, use a surgical one a little higher, and secure it all with an academic one. Pull and cauterize the end. Tie the cord on your hand so you don’t miss it when casting.
Features of transportation and storage
When using search magnets, you need to follow several recommendations regarding transportation and storage:
- The unit must be kept in a special non-magnetic container. A wooden box or a special bag with shielding is perfect.
- The structure should be moved very carefully, keeping a distance of several meters from electrical equipment and machinery. A strong magnetic field will harm gadgets and computer devices.
Bags for magnets
Bags for search magnets with shielding are an indispensable accessory for any treasure hunter. It is made of wear-resistant material with sewn-in steel plates to isolate the magnetic field. A person will be able to move the unit without the risk of accidentally magnetizing it in the wrong place.
The bag is quite durable and perfectly protects the magnet from external damage, simplifying transportation.
Search Magnet Alternative
Magnetic trawls are devices with an elongated horizontal working surface, designed from a special rare alloy of neodymium, iron and boron for work in difficult conditions. The device is covered with stainless steel and applied using a special technology. This is done in order to protect the magnet itself from damage.
conclusions
Before purchasing a magnet, you need to decide on its purpose and the subject of your search. For “fishing” from a boat or bridge, a small one-sided device is suitable; it is especially popular among beginners. The double-sided unit has better characteristics and can be used in various adverse conditions. For an ordinary amateur, a magnet with a low attractive force of 300-400 kg will be suitable, but for a professional – from 500 kg and above.
Source: http://urklad.ru/poiskovye-magnity/kak-pravilno-vybrat-poiskovyj-magnit-obektivnyj-rejting-luchshih-poiskovyh-magnitov-pod-ljubye-celi/
Search magnet for gold and silver: what is it, does it exist, what metals does it attract, operating principle and assembly
We are glad to welcome you to our website, dear guests. Today we will talk about whether there is a search magnet for gold and silver, the principle of operation of the magnet, useful properties and methods of application. We will review the models and suggest a way to build such a device yourself. Stay, it will be interesting.
Differences from a metal detector
The operating principle of a metal detector is also based on electromagnetic radiation, however, this device does not attract metals to itself, but captures echoes of the “response” of substances to the field it emits. If there is metal in the ground or water, the device gives a signal. Further work on retrieving objects falls on the person.
The magnet does not provide any information, but simply “attracts” to itself those objects that it is capable of influencing.
Where can it be used
There are areas where you cannot do without a device:
- deep wells;
- rock crevices;
- the bottom of reservoirs, including at great depths.
The device allows you to explore such places and remove objects located there without additional effort.
Can you attract silver and gold?
Precious metals are diamagnetic, so they cannot be extracted using a magnet. An exception may be objects that contain parts made of ferromagnetic metals, and such a part must be voluminous enough to be attracted.
You should not rely on the device to magnetize precious alloys. As a rule, the proportion of ferromagnets in the composition of the alloy is extremely small.
If you want to search only for precious metals, you are better off purchasing a metal detector.
What metals still attracts
The most famous ferromagnets:
- among metals - iron, cobalt, nickel, chromium;
- their alloys, such as cast iron and stainless steel.
Rare earth metals (lanthanides) are attracted to the device. Manganese, sulfides, selenides and tellurides have ferromagnetic properties.
Advantages and disadvantages
The indisputable advantage of a magnet is its ease of use:
- it does not require special storage conditions; you should, perhaps, avoid heating it above 80 degrees;
- does not need recharging;
- has a very simple design;
- takes up little space.
The disadvantage is that it cannot be used to extract gold, silver, and their alloys, including nuggets.
Another thing is metal detectors. The advantage of modern metal detectors is their ability not only to find, but also to distinguish which metal is within its coverage area. How does this feature work? This was made possible thanks to the use of a computer in the design of the device, which analyzes all incoming signals, reacting to the smallest changes.
Is it possible to make money searching for gold and silver with a magnet?
It is impossible to effectively search for precious metals using only a magnet. However, you can use it as an additional device, along with other equipment.
Using it, you can clear the surface of the search site from metal debris, which usually makes it very difficult to detect silver and gold with a metal detector.
Tips for choosing
In addition to their shape, the devices also differ in the strength of the radiation and the method of attaching the cable.
Experienced treasure hunters are advised to choose powerful double-sided magnets, since they are universal and easy to use, although they are more expensive.
Weight and ammunition
Any tool is most effective if it is selected in accordance with the task at hand. The choice of magnet is no exception. To begin with, you should decide what items it will be used to search for, and based on this, select the appropriate device.
It should be taken into account that the higher the power of the magnet, the greater its mass and cost. The optimal option is 400 kilograms. This is not the weight of the magnet, but the weight it can lift!
In addition to the magnet itself, you will need a cable with which the search device can be lowered to the bottom of the reservoir. It is better to choose ammunition with a large margin of safety, exceeding the power of the magnet itself, in order to avoid ruptures and loss of the device. Finding him later is almost impossible.
How to assemble and set up a magnet with your own hands
Making a magnet at home is not an easy task if you don't have neodymium supplies on hand. But building an electromagnet using not a rare ferromagnet, but an electric field, is quite simple.
Required Components
To build an electromagnet you will need:
- iron for the core (nail, lock shackle);
- copper insulated wire;
- source of electric current (battery, accumulator);
- connecting wire;
- soldering iron
Assembly sequence
Copper wire is wound tightly, neatly, in one direction, onto the core. If a regular AA battery is used as the power source, you can connect it directly to the ends of the winding. For power supplies and batteries, it is necessary to solder the connecting wires (twisting and insulation are also allowed).
See the assembly visually in the video:
How to use it correctly
To search for valuables, it is better to use industrially made magnets. When purchasing a device, it is better to choose units with an eye bolt, which makes it much easier to separate the magnet from the object.
Safety precautions and what to be careful with
It should be remembered that the magnet affects all objects nearby, including pacemakers.
For a person who has such a stimulator, the magnet is dangerous, as it can cause malfunctions in the operation of the medical device.
Mobile devices and bank cards should also be protected from electromagnetic influence to avoid their failure.
Tips for caring for your device
If work was carried out in water, after use the device must be thoroughly wiped from moisture and dried to avoid rust.
Protect the device from strong shocks, since neodymium cores are quite fragile, and if a crack or chip occurs, they lose power.
Reviews
Egor: “The magnet is great for removing small metal debris from soil dumps when working at a mine. I recommend".
Andrey: “It’s a great thing to get change out of fountains, especially in Europe.”
Victor: “Such a thing is of little use when searching for gold and silver, but for diggers who hunt in battlefields and look for artifacts of the Great Patriotic War, it is an irreplaceable thing.”
Conclusion
I hope this material has helped you clarify the question of what is the use of a magnet and whether it is worth acquiring such a device to search for valuable items.
Don't forget to comment on what you read and share articles on social networks. And we take our leave, all the best.
Source: https://zhazhdazolota.ru/dobycha/poiskovyj-magnit-na-zoloto-i-serebro
Search for coins and treasures
Searching for coins and treasures with a “search magnet” in water (river, well, lake, etc.) and in the ground (attic backfill, beaches) is gaining great popularity. Why ?
In this article I will tell you: which coins can be magnetic and which cannot? what types of magnets are there? how to search with a search magnet? What can you find with a magnet, and in what places can you find something worth 100%?
Anyone who has decided to sell the found ferrous metal is advised to read our article.
What metals does the “search magnet” attract?
A search magnet will not attract precious and non-ferrous metals in their pure form (gold, silver, copper, aluminum), since they are not “ferromagnetic”. A magnet can attract: iron, cast iron, steel, nickel.
For those who are going to use a “search magnet” to look for coins and treasures, as a consolation (to add optimism, so to speak), I want to say that: firstly, the coins may be in an iron case-box (according to statistics, all the treasures found were located there), secondly where have you seen coins made from the same metal?
In many cases, this is an alloy of ferrous metal with non-ferrous metal (the photo is one hundred percent proof of this, coins on a magnet, most likely a copper-nickel alloy, it’s hard to see, but I think Tsarist Russia).
Precious metals are a different matter, and gold and silver are fused reluctantly, one might even say not at all.
Modern coins, some Soviet coins (mainly 1, 2, 3 and 5 kopecks), and some Tsarist coins are especially well magnetized.
The higher the magnetic properties of a coin, the more iron or other ferromagnetic there is in the copper alloy (well, at least 1.0–2%).
As for the magnetic Royal coins, I recently read a small article about this (I don’t remember where), that at the Yekaterinburg Mint at one time a lot of copper magnetic coins were minted.
The reason for this was that copper with a high iron content was mined at one of the mines, so coins made from this ore are fully attracted by a magnet.
It is also known that some coins of Anna Ioannovna, and coins of 1 and 2 kopecks from 1811-1843 are magnetic, and the latter are generally a ternary alloy (copper-nickel-zinc).
I advise you to have a very strong magnet (preferably made of non-bium) to search for coins.
What types of search magnets are there? Where can I buy them?
Search magnets have different weight holding strengths: 200, 300, 400, 600, or 1600 kg. Magnets can also be single-sided or double-sided. The second option is preferable, since the metal attraction area is available on both sides.
You can buy a magnet in the online store of search equipment, for example, double-sided with a force of 120 kg, it costs only 1.5 thousand rubles, for a magnet with a force of 600 kg, you will have to “fork out” 5800 rubles.
The only obstacle to purchasing a search magnet is delivery (after all, under the conditions of delivery by Russian Post, it is strictly forbidden to send magnetic materials).
A search magnet consists of three parts: a body, a magnet, and a bolt-loop (a cable or rope is attached to it).
Safety precautions when working with a magnet are very important: do not insert any parts of your body between the magnet and the metal, as you can be seriously injured (in some cases, even fractures); when transporting, make sure that it does not come into contact with metal parts of the machine, do not heat the magnet, as at temperatures above 80 degrees Celsius, it can demagnetize; after use, wipe it with a dry cloth to avoid corrosion.
Where to look to find something “worthwhile”?
You can search with a magnet: in natural reservoirs, wells, swamps, on sandy beaches, in powder in the attic.
There can be a lot of metal finds on the beaches: modern small change (modern 10 rubles are especially well magnetized), keys, corks, etc.
When searching in the attic, we advise you to comb the area first with a magnet so as not to rush into hundreds of metal detector signals; there are a lot of metal objects there.
In order to optimally search for valuables in the water, you need to take the choice of “fishing” place very seriously. My advice to you is to look for the place of an ancient beach, or a place where, according to the stories of the guards, people took water, washed, and swam.
Usually there is sandy soil, a convenient descent, and a flat shore area.
Also, if you live in the Middle Volga, you probably know that during the construction of the Kuibyshev Reservoir (the Volga flood), thousands of villages were flooded (people moved, or the villages were ancient and abandoned).
Also, don’t forget the tradition of throwing coins into the sea on vacation so that you can come back again, or into the river “for good luck.”
Take old maps and overlay them on modern ones (I tell you how to overlay them here), look for ancient flooded villages, buy a magnet and a boat, and go ahead to search for valuables.
By the way, if you sell scrap metal along the way, you will always be in the black.
Finds in the water will be the following: nails, irons, knives, coins, rings, shovels, axes, fish hooks and other metal objects.
Yes, move electronic devices away from the magnet, as it can strongly influence them with its magnetic field.
Good luck with your “catch”. Read our blog
Source: https://poiskstariny.ru/poisk-monet-i-kladov-poiskovyim-magnitom-v-vode-v-zemle-nahodki-gde-kupit/
