What is the harm to the human body has a magnet

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Earth itself has a very strong magnetic field, so the human kind to adapt itself to the magnetic or dependence. Weak magnetic shear stability is good for the body, is also often used in medical magnetic therapy. Electromagnetic wave is different, it is a high-energy waves, the frequency of adverse effects on the body. So that no harm to human magnet. magnetic broom

Magnet bracelet both harmless to humans but also useless. Magnetic resonance imaging in medical devices, the high magnetic field of 3T or longer, no harm to human body. We recognized that in all radiology medical devices, NMR is the most secure. That people are not afraid of a magnetic field, even more afraid of radiation. High magnetic field does have some negative impact on the human body, but the content of the magnet bracelet magnet limited and could not cause any impact on the human body. Some people claim that a change in the physiological tissue magnet provides the magnetic field, or even that each cell has its positive and negative poles, it was also claimed that magnets can improve blood circulation. Magnetic Plate  In fact, there is no evidence of human blood and tissue cells or any magnetic interaction of iron ions in red blood cells, has not ferromagnetic, even diamagnetic, the magnetic field will not be attracted to well-known heat will promote blood circulation, As a result, the skin becomes red, if the magnet can really promote blood circulation, why direct contact with the magnet no redness of the skin of the phenomenon? n52 neodymium magnets
Magnetic effect is the so-called psychological implications ability, and not very direct and obvious medical effects. Weak magnetic field lines through the magnet bracelet wrist continue to stimulate micro-circulation system, promote blood circulation, improve physiological field, fatigue has a very weak effect, indeed there are certain advantages for sleep, but is not. Long-term wear magnet bracelet does not have any damage to the human body.

Magnets how to form?

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Every atom within the metal on both electrons in a circular motion around its, resulting in a small magnetic field strength (ie Ampere force), usually one per

Atoms on the direction of movement of electrons are different, and so the direction of the force is different, so the final force is 0, that is, no magnetic force.
When most of atomic electron moving in the same direction, the direction of the force on the overlap, and thus produce a comparative force is magnetic force, with the magnetic field

Force, this metal is naturally a Neodymium Arc Magnets slightly.
As formed, there are many methods can make the electron motion in the same direction, such as north-south direction allowed after heating the metal stand to cool.
This is a high school sophomore physics class students will learn the content. Is the "molecular electric current ampere hypothesis" content.

Magnetic field has a variety of metal-on-force, no exceptions. However, in three cases. Thus the metal is divided into three types: paramagnetic, reverse magnets and ferromagnetic.
1 paramagnetic: Can be a magnet to attract slightly. magnetic trapping
(2) inverse Magnet: Magnet will be slight exclusion.
3 ferromagnets: will be strongly attracted to a magnet.
Ferromagnet only three: iron, cobalt, nickel. Rest or paramagnetic or inverse magnets. As well as their alloys, the magnetic properties are different degrees of proximity ferromagnetic content

Body .
Nickel-containing stainless steel may be a radial magnet (strong) attractive. Nickel-free stainless steel (usually containing chromium) reflect this iron faint and difficult to detect. The latter because it contains

Chromium and high hardness. The former is commonly referred to stainless steel iron.
Aluminum and copper thin with longer suspension, and make it still does not swing. Lateral slowly approaching magnet aluminum or copper, can be found that will be slightly attracted or repelled. The

With their difference is paramagnetic and inverse magnets.


Generic magnet magnet
The magnet is a magnet.

Magnets can suck iron, nickel, cobalt and other metals, commonly known as a magnet. Can be divided into general common permanent magnet, and the magnetic solenoid is energized only have. Magnetic

If the rod is made of iron or needle and hung up, it is natural to point to the Earth's South Pole and the North Pole. Divided into large and small magnet magnet magnet.

Large magnet magnet is so widely used, the use of electromagnets, made transporting steel cranes. Powered magnetic become powerful magnets, they are able to suck the bulky

Steel. Steel cut off the power down as long as you can.

Small magnet with a large magnet contrast, compass appears to be both small and light, but also a lot of weak magnetism. The role of the compass is not the absorption of iron, which is to reflect the Earth

The magnetic force.

Magnets attract iron, cobalt, nickel and other properties of matter called magnetism. Both ends of the magnet poles strong magnetic area is known, one end of the north (N pole), one end of the south pole (S

Pole). Experiments show that the same magnetic poles repel each other, opposite poles attract each other.

Many iron having two opposite magnetic poles of the original, in the absence of external magnetic field, these original disordered magnets,? Their magnetic offset each other, seen no significant

Show magnetic properties. When the magnet is close to the iron, the former under the action of the magnet magnets, neatly lined up, so that one end of the magnet close to the opposite polarity of the magnet

The polarity attract each other. This indicates that the iron exists because the original magnet can be magnetized magnet. While copper, aluminum and other metals are not the original magnet structure, it is not

Be attracted by a magnet.

The advantage of the magnet functional materials

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Modern industrial ferrite magnet material, rare earth permanent magnet materials and other materials, such as

the four magnet functional materials classes. Wear representative composition and magnetic properties are

shown in Table 1-1. Table 1-2 is a permanent material production growth in recent years, the world trend. Table 1

-1 and Table 1-2 shows, casting AJNiEb magnet material; Curie temperature Z, high temperature stability, low

temperature coefficient of magnetic induction, but it contains more strategic metal cobalt and nickel. cylinder magnets
        Dilute the 1960s before the advent of the permanent magnet, it was as high as the amount of strict 23000t. By

1995 global production of casting a material has been reduced to about 8000t, in the future there are down year

by year trend! Ferrite magnets are the main characteristics of raw materials, resource-rich, low prices, although

the cough can not high, but still in the automobile industry , audio, communications, home appliances, office

automation: not prepared to be widely used, its production will continue to grow, both pole growth rate of almost

10%. magnetic sweeper
Sm-Co permanent magnetic materials Curie point, high temperature stability, but contains an & over i and

Sm (samarium). Sm in the rare earth ore content is less, and the price is high so Sm-(o Department of magnet

application is limited., NdFeB permanent magnetic (including sintering and Si sticky eggs on the arc can be high

enough to Lu #, excluding strategic cobalt and nickel, relatively low prices, which is widely should Asahi t can be

high, excluding diamonds and strategic metals nickel, relative fir 94 years of its production decreased year by

year. permanent feature is Ren find a energy saving, high efficiency, and compatible, easy operation and high

reliability.  magnetic separation

Future development of new magnetic materials, materials

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Ferrite permanent magnet material, the market demand is growing at an annual growth rate of about 15%, and its composition and process technologies are constantly improved and perfected is still in development stage, to predict the future 20 to 30 years, ferrite permanent Gansu Materials is still widely used) permanent magnetic material. Rare earth magnet material, namely Nd-Fe-B permanent magnetic material life How? See if there is no magnetic polarization of people, the magnetic anisotropy constant KI, Curie, dish degrees' and the price is more than Nd2Fe14B compound good new material appears. 1983 Nd-Fe-B l permanent magnetic materials produced by the day, people have begun to study alternative Nd-Fe-B-based magnet material is new material. ndfeb magnet

        In the EC countries to Dublin university laboratories, the number of one million U.S. dollars investment, has gone through more than ten years, to 1995, Professor in South Korea at the 3rd International Symposium magnetic physics says that after 10 years Research is currently not discovered a new material that can now NdFeB material with new and better materials. Over the last decade to discover new materials with intrinsic magnetic parameters of Nd2Fe14B compound. magnetic knife holder
     
         Metastable Fe3B people and the 'close to the corresponding values ??of Nd2Fe14B, but the magnetic low; Fe23B6 is metastable, Fe16N2 people reach 28 ~ 30T, which is the highest currently known human material. Be recovered from existing problems, namely 8e16 N2 people are using VSM, or Ili, -, Ge sbauer measuring film obtained, measurement accuracy of a suspect. Chunks of Fe16 N2 manufactured still water, Fe16 N2 is metastable transition phase, which has square structure, but it is not the measured magnetic anisotropy. 3:29-type nitrogen compound Nd3Fe27V2N4 gap 0, the (mass magnetization) and D 'is higher than that of Nd2Fe14B, HA Nd2Fe14B also close, but 3:29 nitride phase and 2:17 nitride phase and 1: nitride spider 12 with the same problem . Magnetic Head Pulley

Powerful magnets Precautions and Instructions

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1: very strong magnetic NdFeB, the operation should avoid hand or other body part is a magnet sandwiched For larger magnets and more attention should be paid personal safety and protection.
2: Do not close the magnet electronic medical equipment or medical devices such as pacemakers carry people.
3: Do not swallow magnets. If inadvertently swallowed, immediately go to hospital for treatment. Do not place the magnet on the children can reach.

Note:
In order to insecurity and does not affect the use of magnets, be sure to observe the following rules: Magnetic Tube

4: Magnets in the course should ensure that the workplace clean to avoid iron and other fine impurities adsorbed on the surface of the magnet affect the product's normal use.

5: strong magnetic NdFeB magnets, such as its strong impact, the magnet will be broken and scattered magnetic debris could fly into your eyes, use with caution.
6: NdFeB magnets suitable for keeping indoors in a dry, acidic, alkaline, organic solvents, water, hot and humid environment tends to rust magnet, the magnet powder coating off demagnetization. For non-plated products should pay attention to, when stored properly oiled rust, which is why we recommend NdFeB magnet surface embalmed the main reason.

7: After heating, the magnetic properties of NdFeB magnet will be greatly reduced. Please refer to the directory or temperature characteristics associated pointer, note the magnet assembly or when the temperature is not too high.
8: magnet is using or storing, please avoid corrosive gases, high conductivity environment (such as water containing an electrolyte, etc.), acidic environment, organic solvents, etc. Otherwise it will cause corrosion of the magnet and the magnetic properties and mechanical strength can be reduced. About the heat resistance and other conditions, please refer to the catalog or other data. Related questions, please consult with Ka Tat company.
9: magnetic hard and brittle, and therefore for vibration, shock and other occasions, there may be breakage, shedding phenomenon. If used with such purposes, please note that in the design, even if the fracture is not caused by the magnet off.

10: is a high-speed operation up to the body, so the Neodymium Arc Magnets  nd other items may be broken. At design time, please take the necessary anti-Shi, in case the magnet broken, the fragments will not be flying out.
11: yoke, bonding pads, etc., please fully confirm binder type and amount, conditions of use, strength and reliability and so on.

Storage:
1: To the magnet stored in humid environment, so that its oxidation, appearance, physical properties and magnetic change. tramp iron magnet
Other:
2: To a magnet close to the floppy disks, hard drives, card, tape, Jie record card, TV tubes, etc. If the magnet close to the magnetic recording devices and other devices, may affect or even destroy the record data.
3: Do not iron close to electronic equipment, otherwise it will affect the equipment and affect the use of the control loop.
Allergic reaction to metal if any man approaching magnet will make rough skin, redness. If the reaction occurs, do not touch the magnet.

magnetic separator magnetic separation equipment commonly used classification and main applications

Although there are many areas in the dressing on selection methods and other technical notes. However, Song Ling Mine still recommend performing containing iron ore operations, should try to use the separator as the preferred device. magnet systems Because magnetic separator for iron in the case of the separation process, has inherent advantages and can achieve a real sense for the manufacturers to saving energy, improving the process of sorting mineral recovery. Magnetic separation equipment is generally the first divided according to the level of a weak magnetic field intensity magnetic separation equipment and strong magnetic separation equipment into two categories (also divided into a weak magnetic field, the magnetic field and the magnetic field three categories). Magnetic field strength is less than 240 kA / m (3000Oe) when a weak magnetic field, above which the magnetic field is strong. ndfeb magnet  Weak magnetic separation equipment is mainly used for selection of strong magnetic minerals, while strong magnetic separation equipment for the election of weakly magnetic minerals. Second, job processing is based on sorting or processing of dry ore slurry separation equipment and put into dry and wet categories. Coarse or dry bulk materials handling equipment, wet granules and fine material handling equipment materials. Then is the structural characteristics by magnetic separation equipment for fine classification. грузоподъемные электромагниты

High Gradient Magnetic Separator in the application of kaolin ore sorting analysis

High gradient magnetic separation of kaolin in the dyeing impurities (such as hematite, etc.) has a weakly magnetic, so you can take advantage of high gradient magnetic separator to remove it. United States to use PEM -84 type wet high gradient magnetic separator, make the Fe2O3 kaolin ore from 0.9% to 0.6%, Ti2O3 from 1.8% to 2.0% to 0.8%. This high gradient magnetic separator with stainless steel wool for medium field strength of 1.5 ~ 2.0T, the need to power 270 ~ 500kw. Acid mine in Hunan Song Ling Ling, Leiyang, Perot, Heng Leng wet soil were studied, have achieved good results, especially the use of vibrating high gradient magnetic removal of iron titanium kaolin achieved very good The test index. pot magnets  Hunan Leiyang Song Ling Kaolin Mine CLY500 with vibrating high gradient magnetic separator and the United States PEM-84 high-gradient magnetic separator comparative test results, from a drop of iron and titanium impurities, improve the whiteness of view, Song Ling Mine The high gradient magnetic separator performance is better than the United States. Kaolin in some part of the iron ore in the form of impurities in silicates, very weak magnetism, and titanium is in the form of rutile, the magnetic separation is difficult to work, so the process is usually accompanied by flotation, selective flocculation, and other operations to improve product quality. In recent years, the superconducting magnetic separator has been successfully applied kaolin separation, not only to reduce energy consumption, and field strength can greatly improve the quality of higher kaolin concentrate. Eriez superconducting magnetic separator having a rapid rise, and can be designed in the 60s to the highest field strength (5T), and the demagnetization time is short, which greatly reduces the load from the magnet during the cycle time required to flush magnetic impurities. Its low energy consumption than conventional magnetic separator reduced by 80%, the processing capacity of up to 100t / h or more. Magnetic Head Pulley British tested an iterative superconducting magnetic coil system, the design is similar to a conventional pot-shaped magnetic filter, the difference is that during the working cycle it will remain in the excited state of the superconducting magnet, and no switch control, and continuous operation. High gradient magnetic separator Scope: Mainly used in kaolin, senior ball clay, white clay, bentonite, feldspar, albite, Xia feldspar, sericite porcelain stone, pyrophyllite, illite, dolomite, alumina powder , quartz, alumina, wollastonite powder, transparent spodumene powder, lithium feldspar, calcite, raw talc, talc, limestone, fluorite, light calcium nonmetal ore (less than 60 mesh) to wet iron. High gradient magnetic separator with stainless steel wool for medium field strength of 1.5 ~ 2.0T, the need to power 270 ~ 500kw. imanes tierras raras

Magnet demagnetization factor

Have life magnet, the magnet prolonged contact with air force will be reduced, the magnet oxidation. samarium cobalt magnets Magnet in contact with corrosive liquid oxidation fastest. Each magnet has its own temperature parameters, if the magnet working temperature exceeds the magnet itself can withstand physical temperature, the magnet will change the physical properties, the magnetic force of the magnet will decay! magnetic tools

Magnets in the role of high-tech products

Currently China NdFeB magnets applied as follows, the field of application of high-tech products accounted for 37%, such as magnetic resonance imager (MRI), Magnetic Rods the phone vibrates, hard drive coil (VCM), disc (DVD, CD-ROM) drive spindle , electric tools, electric cars, inverter air conditioner engines. Traditional fields of application affordable products accounted for 63%, such as audio devices, magnetic adsorption devices, magnetic devices, magnetic devices. tube magnets