Circulated screening process for fine iron powder

Abstract

The invention relates to a circulated screening process for fine iron powder. The process includes: (1) conveying materials, feeding a coarse iron ore powder raw material into a high-frequency screen, and separating the coarse iron ore powder by high frequency vibration; (2) conveying the raw material after primary screening by the high-frequency screen into a high-pressure pump; (3) feeding the raw material into magnetic separators by the high-pressure pump; performing magnetic separation, screening fine iron powder from the raw material, conveying the fine iron powder to a conveyor belt of the next step, conveying the fine iron powder to a packaging machine by the conveyor belt, and packaging, thus completing screening; and (4) feeding waste dregs of the magnetic separators into a material hopper through pipelines, feeding the waste dregs into the high-pressure pump by the material hopper, and repeating the step (1) to the step (3) to perform circulated screening. The magnetic separation process for the fine iron power can continuously circulate and return the waste dregs after screening of the coarse powder into the magnetic separators, thus finishing fine screening of high-purity iron powder step by step, achieving circulated screening of the waste dregs and avoiding loss of a certain amount of the iron element in the waste dregs.

Description

technical field [0001] The invention belongs to the field of iron powder screening, in particular to a fine iron powder circular screening process. Background technique [0002] Fine iron powder is obtained by crushing, grinding, beneficiation and other processing of iron ore. Fine iron powder can be screened by various methods such as magnetic separation, flotation, and re-election. In the above process, the crushing is mainly completed by the roller mill, and the following steps mainly use the following equipment: including roller ultrafine mill, high-frequency screen, magnetic separator, usually in order to obtain higher purity iron powder, high-frequency The number of sieves and magnetic separators can be multiple, because high-frequency sieves consume a lot of energy, resulting in excessive energy consumption, thereby increasing operating costs. Contents of the invention [0003] The object of the present invention is to overcome the disadvantages of the prior art, ...

AI Technical Summary

Problems solved by technology

In the above process, the crushing is mainly completed by the roller mill, and the following steps mainly use the following equipment: including roller ultrafine mill, high-frequency screen, magnetic separator, usually in order to obtain higher purity iron powder, high-frequency The number of sieves and magnetic separators can be multiple, because the high-frequency sieve consumes a lot of energy, resulting in excessive energy consumption, thereby increasing operating costs

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