【Huate Magnetic Separation Encyclopedia】Application of Oil Cooling Technology in Magnetic Separation Equipment

【Huate Magnetic Separation Encyclopedia】Application of Oil Cooling Technology in Magnetic Separation Equipment

Magnetoelectric beneficiation equipment plays an irreplaceable role in metal and non-metal beneficiation production. The development, principle, advantages and disadvantages and industrial application of water cooling, air cooling and forced oil cooling technology are analyzed and compared. The results show that oil cooling technology is a key technology in the field of mineral processing equipment manufacturing, which can improve the performance of equipment, meet the requirements of mine production, and has broad application prospects in the fields of magnetic material separation and non-magnetic material removal of magnetic impurities.

Magnetoelectric beneficiation equipment is a kind of equipment that can generate strong magnetic force, which is widely used in the separation of black, non-ferrous and rare metal ores.

The strong magnetic field magnetic separator is mainly used to solve the sorting problem of weak magnetic minerals. At present, the strong magnetic field magnetic separator mainly uses the electromagnetic field. There are two main ways to obtain the electromagnetic field with high field strength. One is to increase the linear size of the equipment, and the other is to increase the electromagnetic load. In practice, due to the limitation of components, the increase of linear size is also limited, so increasing the electromagnetic load becomes an effective method.

As the electromagnetic load increases, the temperature of the electromagnetic coil will inevitably rise. Therefore, in order to ensure the safe operation of the mineral processing equipment, cooling technology is required to control the temperature of the electromagnetic coil within the allowable range. Therefore, cooling technology is of great significance in terms of large-scale equipment.

For magnetoelectric beneficiation equipment, the main core component is the electromagnetic coil, which is directly related to the service life of the equipment. Therefore, the cooling method of the electromagnetic coil is very important, and its development process has gradually changed from air cooling, water cooling to liquid oil cooling, forced air cooling, oil-water composite cooling, and then to evaporative cooling. These cooling methods have their own advantages and disadvantages.

Solenoid Cooling Technology

1.1 Solenoid coil hollow wire water cooling

In the 1980s, the electromagnetic coil of the magnetoelectric beneficiation equipment has been cooled by a single hollow wire. This method is simple in structure and convenient in maintenance, and is firstly used in vertical ring high gradient magnetic separators. With the increase of the magnetic field strength, the water cooling coil is gradually difficult to meet the requirements, because the water through the hollow wire will inevitably cause scaling on the inner wall of the wire, which will affect the heat dissipation of the coil, and finally affect the selection effect by affecting the strength of the electromagnetic field.

1.2 Solenoid coil wire oil cooling, forced air cooling and oil-water composite cooling

The excitation coil is made of H-class (temperature resistance 180 ℃) double-glass silk-wrapped electromagnetic wire, three-dimensional winding structure, and insulation between groups, so that each group of coils is fully in contact with oil, because the product coils form independent coils. Circulating oil passage, installing air cooler and heat exchanger outside the coil, and forced circulation, high heat dissipation efficiency, so that the temperature rise of the electromagnetic coil is less than or equal to 25 ℃.

The transformer adopts oil cooling, which greatly changes the cooling effect, improves the utilization rate of materials, reduces the linear size of the equipment, enhances the electrical insulation performance, and prolongs the service life of the equipment. Now the magnetoelectric beneficiation equipment has widely adopted oil cooling technology.

Oil cooling technology applied to vertical ring high gradient magnetic separator.

Oil Cooling Technology Applied in Electromagnetic Slurry High Gradient Magnetic Separator

Oil cooling technology applied to electromagnetic iron remover

1.3 Evaporative cooling of electromagnetic coil

The research on evaporative cooling technology has been carried out for many years at home and abroad, and some achievements have been achieved, but the actual application effect is not satisfactory. In terms of principle, evaporative cooling technology is an efficient cooling technology, which is worthy of further study. Because the medium it utilizes has the characteristics of vaporization and electrical insulation, it can form a natural circulation state. The evaporative cooling technology was first transferred and grafted to the cooling of the electromagnetic coil of the magnetoelectric beneficiation equipment. It started from the cooperation between Shandong Huate Magnet Technology Co., Ltd. and the Institute of Electrical Engineering of the Chinese Academy of Sciences in 2005. At present, it is mainly used in electromagnetic iron removers and vertical ring high gradient magnetic The machine selection and field application show that the heat dissipation effect is good and the ideal production effect is obtained. At present, the cooling medium used in the evaporative cooling technology is Freon, which is currently restricted due to its damaging effect on the ozone layer of the atmosphere. Therefore, the development of efficient, low-cost, and environmentally friendly cooling media is the future direction of development.

Large-scale magnetoelectric beneficiation equipment adopts oil cooling technology, which can be significantly improved in performance, temperature rise, power consumption, equipment quality and cost performance.

Application of magnetoelectric beneficiation cooling technology

Application of Oil-Water Composite Cooling Vertical Ring High Gradient Magnetic Separator in Australian Hematite Tailings Reprocessing

Application of oil-water composite cooling vertical ring high gradient magnetic separator in hematite wet pre-selection project

Oil-water composite cooling vertical ring high gradient magnetic separator is used in kaolin purification project

Electromagnetic high gradient magnetic separator customer application site

Strong oil cooling electromagnetic iron remover, operating at Tangshan Caofeidian port

The application of oil cooling technology in magnetoelectric beneficiation equipment can improve the performance of the equipment, meet the production requirements of mines, and have broad application prospects for the separation of magnetic materials and the removal of magnetic impurities from non-magnetic materials.

Scope of technical services of Huate Mineral Processing Engineering Design Institute

①Analysis of common elements and detection of metal materials.

②Preparation and purification of non-metallic minerals such as fluorite, kaolinite, bauxite, leaf wax, baryrite, etc.

③The beneficiation of black metals such as iron, titanium, manganese, chromium and vanadium.

④ Mineral beneficiation of weak magnetic minerals such as black tungsten ore, tantalum niobium ore, pomegranate, electric gas, and black cloud.

⑤ Comprehensive utilization of secondary resources such as various tailings and smelting slag.

⑥ There are ore-magnetic, heavy and flotation combined beneficiation of ferrous metals.

⑦Intelligent sensing sorting of metallic and non-metallic minerals.

⑧ Semi-industrialized continuous selection test.

⑨ Ultrafine powder processing such as material crushing, ball milling and classification.

⑩ EPC turnkey projects such as crushing, pre-selection, grinding, magnetic (heavy, flotation) separation, dry raft, etc.