The flake graphite ore dressing process has a low grade of graphite ore, which is generally 12% to 15%. In the beneficiation, attention should be paid to the protection of scales. Therefore, multi-stage grinding is required for multi-stage sorting. The process includes: (1) Preparation work (coarse, fine crushing and coarse grinding); (2) Flotation operations (rough selection, sweeping and selection); (3) Concentrate treatment (dehydration, drying, screening, packaging). Figure 1 shows the process flow of flotation flake graphite from the Nanshanshu Graphite Ore Dressing Plant in China. The main mineral ore flake graphite gangue minerals as calcite, chlorite, tremolite, plagioclase, garnet, kaolinite and the like. Five selections of flotation processes using four stages of grinding. The collector is terpene alcohol and triethoxybutane. The pH of the slurry is adjusted to 8-9 with lime, and the concentrate with a grade of about 89% is selected from the ore containing 4% to 5% of carbon. The recovery rate is 80. %about. In order to obtain high-purity graphite and high-carbon graphite products, the mine has partially purified flotation concentrates by wet chemical extraction to make the grades above 98%.
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