Russia plays an important role in the world in terms of magnetic separation research and magnetic separator manufacturing.俄罗斯米哈诺Boolean beneficiation Research and Design Institute, Institute of ferrous metals beneficiation, beneficiation Ural Research and Design Institute and the National Institute of processing machinery research and design workers laid the foundation for the development of magnetic separation machines and a wide range of industrial applications. They established a theoretical basis for the magnetic separation method, proposed the principle of modern magnetic separation equipment manufacturing, and various types of magnetic separation equipment were popularized and applied. The new magnetic separation equipment has better parameters. From 1965 to the present, the throughput of the barrel magnetic separator has increased by a factor of 10, from 30 t/h to 350 t/h. Magnetic magnetic induction with a magnetic field of 155-160 kA/m, a production capacity of 20-50 t/h, and a magnetic ore suspension with a particle size of -6 mm and regeneration of a heavy medium suspension , Э ВМ-90/СЭ, /246-A and 217-СЭ-П-А barrel type magnetic separator; magnetic field magnetic induction intensity is 1250kA/m, production capacity is 0.7, 4 and 12t/h, magnetic separation granularity is 2 3ВC-38/9, ЭВC-36/50 and 2ЭВC-36/100 dry roll magnetic separators with ~3mm weak magnetic ore, non-ferrous metals and rare metal concentrates and other products, and magnetic induction strength of 1.1 ~1.5T, production capacity of 5, 5 ~ 10 and 50 ~ 100t / h, sorting of weak magnetic ore and material with a particle size of 0.8mm 1 / 1 Э Ф Ф Ф - - - - - - - - - - - - - - - - - - - Rotary wet magnetic separator.

When the specific magnetic susceptibility is lower than 10·10 ^-9 to 30·10 ^-9 m ³ /kg and the particle size is less than 10-20 μm, the high gradient magnetic separation efficiency is significantly reduced. The Institute of Metallurgy of the Russian Academy of Sciences has produced a superconducting magnetic separator with a magnetic induction of 6.1T. When the magnetic flux density increased from 1.2T to 6.1T, the concentrate Nb ₂ 0 ₅ recovery increased from 24.9% to 78.7%. At 5.6 T, the removal rate of kaolin iron reached 94.6%. The removal rate of feldspar - quartz material iron reached 83.9%. The Mihanopur Institute of Black Metal Research and the Institute of Mineral Materials have developed a superconducting magnetic separator with a magnetic induction strength of 7 to 8T to treat rare metal ores.

Ukrainian iron ore reserves account for 13% of the world's total reserves, mainly for iron ore, with an iron grade of 28% to 35%. Six mining companies use the conventional magnetic separation process to produce 36 million tons of iron concentrate annually, of which more than 80% The iron grade is 63.7% to 65.1%. The magnetic iron recovery rate is 90% to 96%, and the total iron recovery rate is 65% to 77%. The iron oxide entering the concentrator was 19.7% to 28.2%. The tailing iron grade is 11.7% to 17.5%. The loss of iron oxide in tailings is 90% to 98.4%. The magnetic hydraulic sorter performs magnetic water washing on the ore in a weak magnetic field. Magnetite acts as a sorting medium. The sorting process is similar to jigging. Heavy iron oxide passes through the magnetite bed and quartz is discharged from the upper part of the bed. The device can recover both magnetic iron and iron oxide. This method has been applied industrially.

The magnetic hydraulic separator consists of a feeding barrel, a feeding barrel magnetic system, a cylinder sorting chamber, a sorting magnetic system, a tweezers and a grit discharge system (Fig. 1). It not only removes the slime from the magnetite concentrate, but also removes the coarse-grained continuum to increase the iron concentrate grade by 2.5% to 7.5%. Magnetic water separation of magnetite ore concentrates can remove coarse gangue minerals. The refined iron grade increased by 1.2% and the recovery rate increased by 3.8%.

Figure 1 Magnetic hydraulic sorting machine

1. hydraulic sorting tank; 2. magnetic system; 3. sleeve; 4. feeding tube; 5. electric motor driving the dice;

6. Feeding box; 7. Floor plate; 8. Overflow gate; 9. Scorpion; 10. Concentrate discharge device

Wooden Letter Rack

Wooden Letter Rack,Wooden Letter Holder,Wooden Mail Organizer,Wooden Letter And Key Holder

Hangzhou Freefish Import & Export Co., Ltd. , http://www.fltdframe.com