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我矿是日处理原矿300吨的小矿山。选别流程为先浮选铜,再磁选铁,磁选尾矿用摇床选得钨锡混合粗精矿。原来用浮选-重选-浮选流程处理混合粗精矿,生产指标不理想。为此,改用重选-浮选流程,取得了较好的指标。(一)粗精矿性质粗精矿中主要有用矿物为锡石和白钨,约占70%,其次还有少量的(有时没有)黝锡矿。脉石矿物主要有柘榴石,约占23%,其次为弱磁性铁矿物和角闪石等。粗精矿含锡在8—40%之间,有少量锡石与角闪石连生,白钨矿全部单体解离。+400目产率80%,金属量76%以上;-400目锡品位比混合矿高10—20%。(二)原浮选工艺及存在问题原粗精矿采用单槽浮选,约75%粗精矿用苄基胂酸浮选锡石,浮
My mine is a small mine processing 300 tons of ore a day. Selection process for the first flotation of copper, then magnetic separation of iron, magnetic separation tailings shaker tin-tungsten mixed crude concentrate. The original flotation - re-election - flotation process mixed crude concentrate, the production index is not satisfactory. To this end, switch to the re-election - flotation process, and achieved good indicators. (A) the nature of crude concentrate The main minerals used in rough concentrate cassiterite and scheelite, accounting for about 70%, followed by a small amount (sometimes without) stannous tin. Gangue minerals are mainly garnets, accounting for about 23%, followed by weak magnetic iron ore and amphiboles. Crude concentrate containing tin between 8-40%, a small amount of cassiterite and amphibole with students, all scheelite monomer dissociation. +400 mesh yield of 80%, more than 76% of the amount of metal; -400 mesh tin grade 10-20% higher than the mixed ore. (B) the original flotation process and the existing problems of crude ore using a single slot flotation, about 75% crude concentrate with benzyl acid arsenic flotation cassiterite