内容简介 重力选矿简称重选法。重选适于处理有用矿物与脉石间具有较大密度差的矿石或其他原料。它是处理粗粒、中粒和细粒(大致界限是大于25毫米、25"2毫米、2~O.1毫米)矿石的有效方法。在处理微细矿泥(小于0.1毫米)时效率不高,现代的流膜选矿设备有效回收粒级可以到20-30微米,离心选矿机可以到10微米。
目前钽铌矿的选矿多以重选为主,但重选法选别细粒钽铌矿的回收率非常低。
At present, most of Ta-Nb ores are processed by use of gravity concentration, with which the recovery of fine-grained Ta-Nb mineral is very low.
为了用重选法回收锡石,大厂锡矿需先用粗粒优先浮出硫化矿石,但分选比较困难。
In order to recover cassiterite by gravity separation, it is necessary to separate sulphide minerals from the Dachang cassiterite ores by coarse preferential flotation.
现阶段,我国细粒级黑钨矿的回收主要采用重选法,其中钨的回收率一般在45%以下,损失率较大。
Nowadays, gravity concentration is used to recover fine wolframite, but the recovery of wolframite is lower than 45%.
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