伴生微细粒萤石分步抑制浮选试验研究

Experimental Study on Stepwise Inhibition Flotation of Accompanying Microfine Fluorite

某多金属尾矿含萤石19%~20%,-38μm微细粒萤石质量分数高达62.26%,属伴生微细粒难选萤石矿。为回收萤石资源,开展浮选试验研究。结果表明,粗选采用纯碱为调整剂,水玻璃与单宁酸为组合抑制剂,CYP为捕收剂,精选采用碱性区加水玻璃酸性区加盐酸与酸化水玻璃的分步抑制工艺。最终通过“1次粗选,6次精选,精1、精3中矿排尾,其余中矿顺序返回”的闭路流程,可获得CaF_(2)品位为93.83%、CaF_(2)回收率为61.38%的萤石精矿,较好地实现了该伴生微细粒萤石的回收利用。

A certain polymetallic tailings contain 19%-20%fluorite,-38μm fine-grained fluorite is as high as 62.26%,belonging to the associated fine-grained refractory fluorite ore.In order to recover fluorite resources,flotation experiments were conducted.The results show that the coarse selection used soda ash as the regulator,sodium silicate and tannic acid as the combined inhibitor,CYP as the collector,and the selective selection used a step-by-step inhibition process of adding hydrochloric acid and acidified sodium silicate in the alkaline zone and acid zone.Finally,a fluorite concentrate with a CaF_(2) grade of 93.83%and CaF_(2) recovery rate of 61.38%can be obtained through the closed circuit process of“one roughing,six cleanings,intermediate ores of the first and third cleanings discarding,and the remaining intermediate ores returning in sequence”,which effectively achieves the recycling and utilization of the accompanying micro fine fluorite.