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Magnetic Field Application Technology of Superconducting Magnetic Separation Technology

Magnetic field application technology of superconducting magnetic separation technology Magnetic separation is a method of sorting based on the difference in the magnetic properties of various materials. Because magnetic particles with different magnetic properties are separated by magnetic force, mechanical force (gravity, centrifugal force, friction force, water, air flow dynamics, etc.), they move along different paths and can be accessed separately. , Magnetic materials thus obtain magnetic and non-magnetic products. Superconducting magnetic separation is the replacement of conventional magnets in magnetic separation devices with superconducting magnets. The practical high-conductivity Ti-Ti and Ti-Sn superconducting wires have a critical current density of 104A/cm2 to 105A/cm2, which is several hundred times to several thousand times higher than the maximum allowable current density of the copper wire. Therefore, a superconducting magnet can generate magnetic field strength of tens of thousands of Gs or more in a working diameter of several meters. In addition, after the superconducting magnet is energized, if the superconducting switch is closed and the power supply circuit is cut off, a closed superconducting continuous current loop may be formed. In the long-term operation, only a very low power required for maintaining the low-temperature cooling is consumed, which is a conventional magnet. Comparable. It is estimated that the ratio of the energy consumption of the superconducting magnet to the conventional magnet is 1:25, the ratio of the amount of processing is greater than 10, and the size can be reduced by 1/3 to 1/2. Superconducting magnetic separation can be used to separate ferrous metals, non-ferrous metals, rare metals and other industrial raw materials. In the past, at the factory, water-cooled copper coil electromagnet separators generally consumed large amounts of electricity. Now, the superconducting magnet with 5T magnetic field consumes about 5% of the power of the original 2T conventional magnet. Superconducting Magnetic Propulsion Ship The superconducting magnetic propulsion system has no noise and vibration due to the absence of propellers, requires no fuel, and has a simple structure with a speed of over 150km/h. Its propulsion force is generated according to Fleming's left-hand rule. A superconducting magnet installed near the bottom of the ship generates a magnetic field in seawater. When the electric current flows in the direction perpendicular to the magnetic field, it will generate a kind of power in the direction perpendicular to the current and the magnetic field, and push a large amount of seawater forward or backward to push the hull forward. As this type of superconducting magnetic propulsion system has a large area of effect on seawater, it has a large driving force, resulting in high ship speed. The 10,000-ton ship is convenient for reversing and shifting at a speed of 160km/h, and has good control performance. It is particularly suitable for various high-speed ships such as semi-submersible catamarans, submarines, submersible tankers, marine survey ships, and icebreakers. . Manufacture of strong magnetic fields The research of condensed matter physics requires a strong magnetic field, while the application of strong magnetic field technology in science and technology reflects the level of scientific and technological development in a country. Strong magnetic fields are divided into three categories: steady state magnetic fields, superconducting magnetic fields, and pulsed magnetic fields. The particle accelerator accelerates atoms and particles by a strong magnetic field and causes the particles to travel along a circular orbit. A 1X increase in magnetic field strength can reduce the size of the accelerator by half. Solenoid valve core material At present, superconducting magnetic field has reached the level of 21T. Energy is the material foundation for the development of human society. The pioneer of modernization is one of the areas that all countries in the world have attached great importance to. Magnetic technology plays an important role in solving the current energy crisis, especially in energy conservation and development of new energy sources. Its effect is very significant and should be promoted.

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