Experimental study on beneficiation of a low grade crystalline graphite ore in Jixi Area
A certain graphite ore in Jixi Area has a grade of 4.81%,mainly composed of crystalline graphite.The graphite scales are arranged in a sheet-like orientation under a microscope,with a diameter of 0.03-1.20 mm.Most of the contact lines with surrounding minerals are relatively straight,and some fine particles are mixed with gangue or wrapped in gangue minerals.The metal minerals in ore are mainly magnetite and pyrite,and gangue minerals are mainly quartz,feldspar and mica.In order to determine the appropriate graphite beneficiation process,reasonably develop and utilize resources,and based on the protection of large graphite scales,combined with the ore properties,it is determined to adopt the beneficiation process flow of stage grinding,stage flotation,and intermediate ore segmented centralized return.With kerosene as the collector and No.2 oil as the foaming agent,through the closed circuit test process of one stage rough grinding,one stage rough separation,seven stages regrinding and nine times cleaning,and two sweeps,a graphite concentrate with a yield of 4.89%,a grade of 94.12%,and a recovery rate of 96.42%is finally obtained.Through the particle size analysis of the concentrate product,the content of +0.147 mm is 28.17%,and the protection rate of graphite scales reaches 55.31%.The test achieves good results,and the obtained product meets the technical requirements for the quality of high carbon graphite.
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NSTL
万方数据
维普
