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国外许多选矿厂磁铁矿的磁选制度趋向于以不同的选矿段分选而且取决于入选矿石的工艺特性。在一般情况下,从初选至以后几段,磁选机的磁场强度降低,在精矿各精选作业中,磁场强度总计占粗选段磁场强度的50～57％。这样,磁铁矿精矿的质量较高而且处理矿石的费用可以减少。关于这种选矿工艺效率的研究情况已有文献报道。文献中提出,为在现有企业改善选矿工艺流程,要提高磁选的选择性,研制磁场可
Magnetic separation systems for many magnetite mines in many foreign countries tend to be sorted by different beneficiation sections and depend on the process characteristics of the selected ore. Under normal circumstances, from the first election to the next few paragraphs, the magnetic separator magnetic field intensity reduction in the concentrate of the fine selection of operations, the magnetic field strength of the coarse total margin of the magnetic field strength of 50 to 57%. In this way, the quality of the magnetite concentrate is higher and the cost of handling the ore can be reduced. Research on the efficiency of this beneficiation process has been reported in the literature. Literature proposed that in order to improve the beneficiation process in the existing enterprises, to improve the selectivity of magnetic separation, magnetic field can be