Beneficiation method for separating weakly magnetic mineral and mica

Abstract

The invention relates to a beneficiation method for separating weakly magnetic mineral and mica, and belongs to the field of beneficiation technologies. The beneficiation method comprises the steps of crushing, sieving and coarse grinding the weakly magnetic mineral (raw ore), performing size grading control and the granularity of 0.074mm accounts for 60 percent to 70 percent; and then performing the pulsating high gradient magnetic separation on the graded weakly magnetic mineral, obtaining castoff non-magnetic gangue and a magnetic product containing the weakly magnetic mineral and the mica through roughing; performing the centrifugal high-gradient magnetic separation on the obtained magnetic product containing the weakly magnetic mineral and the mica to obtain a magnetic product separated from the mica and the mica through roughing; performing size grading control on the magnetic product separated from the mica and the granularity of 0.074mm accounts for 85 percent to 95 percent, and performing the pulsating high gradient magnetic separation to obtain a magnetic product separated from the gangue and the castoff non-magnetic gangue through concentrating; performing the centrifugal high-gradient magnetic separation on the magnetic product separated from the gangue to obtain a magnetic product and the mica through concentrating. The beneficiation method provides two-stage operation, namely the pulsating high gradient magnetic separation and the centrifugal high-gradient magnetic separation, so that the weakly magnetic mineral rough concentrate without the mica or the weakly magnetic mineral rough concentrate containing low mica can be obtained.

Description

technical field [0001] The invention relates to a beneficiation method for separating weakly magnetic ore and mica, and belongs to the technical field of beneficiation. Background technique [0002] Many weak magnetic metal ores (hematite, ilmenite, wolframite, etc.) contain a large amount of flaky weak magnetic mica (such as phlogopite or biotite), which has a small density, but the magnetic properties are at the same level as metal ores. Effective separation cannot be achieved by magnetic separation process. If the flotation process is adopted, flake mica seriously interferes with the flotation process, and the reagent consumption is large, so the effect is not ideal; if the gravity separation process is adopted, due to the small processing capacity of the gravity separation equipment, the economic benefit is not obvious, so it is difficult to apply. So far, there is still a lack of effective beneficiation process, which can realize the mutual separation between weak magn...

AI Technical Summary

Problems solved by technology

[0002] Many weak magnetic metal ores (hematite, ilmenite, wolframite, etc.) contain a large amount of flaky weak magnetic mica (such as phlogopite or biotite), which has a small density, but the magnetic properties are at the same level as metal ores. Effective separation cannot be achieved by magnetic separation

If the flotation process is adopted, flake mica seriously interferes with the flotation process, and the reagent consumption is large, so the effect is not ideal; if the gravity separation process is adopted, due to the small processing capacity of the gravity separation equipment, the economic benefit is not obvious, so it is difficult to apply

So far, there is still a lack of effective beneficiation process, which can realize the mutual separation between weak magnetic metal ore and weak magnetic mica

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