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本文研究了一硬水铝石、高岭石粘土岩和褐铁矿磨矿产物的粒度特性。结果表明,高登—安得烈夫—修曼方程式 y=ax~m 适合于描述磨矿产物粒度特性。式中指数 m 不仅与矿物性质有关,还与磨矿时间有关,由实验数据计算出关系式为 m=k_1+k_2t,即 m 随磨矿时间线性地变化。高岭石粘土岩最易磨碎,褐铁矿次之。进行了含三种矿物的矿石磨矿试验,结果发现,进入分级设备的粗粒产品——粗砂即为含一水硬铝石的合格铝精矿,由于它易于脱水,有利于下一步氧化铝生产,证明了用选择性磨碎的方法脱硅是有效果的。
In this paper, the particle size characteristics of the ground products of a diaspore, kaolinite clay and limonite are studied. The results show that the Gordon-Anduvre-Schuttmann equation y = ax ~ m is suitable for describing the particle size characteristics of the grinding product. In the formula, the index m is not only related to the mineral property, but also relates to the grinding time. From the experimental data, the relationship is calculated as m = k_1 + k_2t, that is, m changes linearly with the grinding time. Kaolinite clay rock is the most easy to crush, followed by limonite. Conducted a mineral grinding test with three minerals and found that the coarse grained product entering the grading equipment - grit is a qualified aluminum concentrate containing diaspore, which is advantageous for the next oxidation due to its easy dehydration Aluminum production proves that it is effective to remove silicon by selective milling.