The lean magnetite ore can be turned into one that has utilization value by wet preconcentration by magnetic separation after fine crushing to discard most of qualified waste.
通过采取细碎后湿式磁选预选方法，抛除掉大部分合格废石后，可以将该贫磁铁矿变成为具有开发利用价值的矿物。
Magnetic separation of magnetic materials according to host drought-wet degree, divided into downstream, counter-current dry wet two kinds.
磁选主机根据磁选原料的干湿程度，分为顺流、逆流干湿两种。
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