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磁选方法能够很容易地把磁铁矿同脈石分开,并且生产率也是很高的。在金属矿物还没有全部分散的条件下,即在开始或中间的选别阶段,要分出磁铁矿是比较困难的。在这种情况下,主要的问题在於分开含不同量磁铁矿的两种成分。精矿与中矿间品位的差别通常不是很大的,几乎在任何时候也不超过40％。当矿石中铁的含量不固定时,能减小粒度差别很大的矿石分离过程的选择性,并且也使得这个分离过程极不稳定。在这些条件下,为了消除或急剧地减少连生体对精矿的污染,矿不经过准备,是很必要的。当乾式磁选粗块矿石时,矿石的准备是按粒度分级。分级分别的选别所得到的各个级别。但在选
Magnetic separation can easily separate magnetite from gangue, and productivity is also high. In the metal mineral has not yet fully dispersed conditions, that is, in the beginning or middle of the sorting phase, to separate the magnetite is more difficult. In this case, the main problem is separating two components containing different amounts of magnetite. The difference in grade between concentrates and mines is usually not significant, not exceeding 40% at any time. When the iron content in the ore is not fixed, the selectivity of the ore separation process, which varies widely in particle size, can be reduced and this separation process also becomes extremely unstable. Under these conditions, it is imperative that the mine is not prepared to eliminate or drastically reduce contamination of the concentrate by successive organisms. When dry magnetic separation coarse ore, ore preparation is graded according to particle size. Grading Each of the different levels of selection. But in the election