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钴磁石合金研磨废料,含有混入的硫及硫化铅等杂质。磁石合金干燥后,粉碎至20目,加四氯乙烯溶出大部分硫及润滑油后,过滤并蒸馏回收四氯乙烯,固体物料干燥后磨碎分级,+60目粒子进行磁选以分离出 Al_2O_3占60％的非磁性部分,而磁性部分及—60目粒子则于950℃下进行氧化焙烧,在1200℃下进行还原,加入氧化钙再熔化,以产出氯化铝渣和阿尔尼科磁
Cobalt magnet alloy grinding waste, containing mixed sulfur and lead sulfide and other impurities. After the magnet alloy is dried, it is pulverized to 20 meshes. After tetrachlorethylene is dissolved to dissolve most of the sulfur and lubricating oil, the tetrachlorethylene is filtered and distilled to be recovered. The solid material is dried, classified by grading, and the particles of + 60 mesh are subjected to magnetic separation to separate Al 2 O 3 Accounting for 60% of the non-magnetic part, while the magnetic part and -60 mesh particles are then subjected to oxidation roasting at 950 ° C, reduction at 1200 ° C, addition of calcium oxide and remelting to produce aluminum chloride slag and Alnico