摘要:
为了保护大鳞片石墨,针对两种不同嵌布粒度的鳞片石墨矿石(1#试样较细、2#试样较粗),分别采用钢球和钢棒作为再磨介质进行试验研究.结果表明:1#试样和2#试样经四次再磨五次精选球磨开路流程,可分别获得固定碳含量为94.50%、96.49%的石墨精矿,1#试样和2#试样经四次再磨五次精选棒磨开路流程,分别获得固定碳含量为94.50%、96.01%的石墨精矿.1#试样球磨和棒磨开路流程精矿中+0.15mm粒级产率均不足3%,棒磨略高于球磨,但棒磨磨矿效率远低于球磨,比较可知球磨工艺优于棒磨工艺;2#试样球磨和棒磨开路流程精矿中+0.15mm粒级石墨含量分别为9.56%、11.38%,棒磨对石墨鳞片的破坏相对较小.
关键词:
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鳞片石墨
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嵌布特征
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棒磨
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球磨
Abstract:
In order to protect large flake graphite, two different flake graphite ores with fine (1# sample) and coarse (2# sample) dissemination sizes were ground with a ball mill and a rod mill, respectively. The results showed that after four times of regrinding with ball mill and five times concentrating, the fixed carbon contents of 1# and 2# graphite concentrates could attain 94.50% and 96.49%, respectively. While using rod mill for regrinding with the same treating process, the fixed carbon contents of 1# and 2# graphite concentrates were 94.50% and 96.01%, respectively. For 1# sample, the size fractions of +0.15 mm yielded less than 3% when using a ball mill or a rod mill. Though the yield of the rod mill process was slightly higher than that of ball mill process, the grinding efficiency of rod mill was much lower than that of ball mill, which indicated the ball mill process was more suitable for fine sample. For 2# sample, the size fractions of +0.15 mm yielded 9.56% and 11.38% when using ball mill and rod mill, respectively. Therefore, rod mill could protect the graphite flake well with smaller disorganization.
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