Wet-type magnetic separation method of magnetite

Abstract

The invention discloses a wet-type magnetic separation method of magnetite. Magnet crude ores are fed into a crusher to be subjected to coarse crushing, the crushed crude ores are fed into a vibrating screen to be screened, a sieve pore is controlled to be 35-75mm, an oversize product is fed into the crusher to be crushed, and the crushed oversize product and screen underflow are fed into a high pressure roller mill to be subjected to fine crushing; the finely crushed ores are fed into a wet-type linear vibrating screen to be screened, the oversize product returns to the high pressure roller mill to be subjected to fine crushing, the screen underflow is subjected to wet-type magnetic separation, and the magnetic field intensity is controlled to be 120-300mT; and the ores subjected to wet-type magnetic separation is fed into a high frequency vibrating fine screen, the size of a sieve pore is controlled to be 0.10-0.5mm, the oversize product is dehydrated by virtue of a vacuum belt filter and returns to the high pressure roller mill to be subjected to fine crushing, and the screen underflow is fed into a magnetic separator or a magnetic separation column to be subjected to magnetic separation, thus a concentrate product is obtained. By adopting the wet-type magnetic separation method provided by the invention, the power consumption and steel consumption are low, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for wet magnetic separation of magnetite. Background technique [0002] At present, the production process of magnetite is a stage grinding-stage magnetic separation process, which mainly includes crushing, grinding, classification, one-stage magnetic separation, coarse concentrate regrinding, two-stage magnetic separation, fine screen, magnetic separation column and other stages. . After the raw ore is dry crushed by a gyratory crusher or a jaw crusher, the particle size is reduced to 300-350mm, and then after being dry crushed by a standard cone crusher, the particle size is reduced to 70-100mm. The material passes through a vibrating screen, and the material under the screen enters the powder The ore bin is temporarily stored, and the material on the screen enters the short-head cone crusher for fine crushing, and the product is returned to the...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a magnetite wet magnetic separation method with low power consumption and steel consumption and low production cost for the disadvantages of large power consumption and steel consumption and high production cost in the magnetite production process in the prior art

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