摘要:
运用矿物解离度测定仪(MLA),研究了云南某低品位磷矿的化学组成、元素分配、矿物成分、解离度及共生关系.通过不同磨矿细度条件下矿物的解离度测定确定了浮选的最佳磨矿细度.针对该矿石低磷高硅高镁的特性,选用硫磷混酸作为抑制剂、HYY-2作为脱镁捕收剂、H2-Z作为脱硅捕收剂,进行双反浮选工艺试验研究.闭路流程试验结果表明,采用反浮选脱镁“一次粗选、一次精选、一次扫选”,反浮选脱硅“一次粗选、一次扫选”的双反闭路流程,可获得磷精矿P2O5品位29.66%,回收率75.96%,MgO含量为0.83%的良好指标,实现了低品位磷矿综合利用的目标.
Abstract:
In this paper,we studied the chemical composition,element distribution,mineral composition,dissociation degree and symbiosis of a low-grade phosphate rock in Yunnan by mineral liberation analyser (MLA).And the best grinding fineness was determined by measuring the degree of dissociation of minerals under different grinding size.Based on the characteristic of this ore with low phosphorus-high silicon and magnesium,we used the mixed acid as inhibitor,HYY-2 as collector for magnesium removal and H2-Z as de-silicon collector in the double-reverse flotation process.The results from closed-circuit test in the double-reverse flotation process show that when adopted "one roughing-one cleaning-one scavenging" reverse flotation technique to demagnesium,and "one roughing-one scavenging"reverse flotation technique to de-silicon,a product of P2O5 with a grade of 29.66% and a recovery rate of 75.96%was obtained,in which the impurity content of MgO is only 0.83%.Finally,we achieved the goal of comprehensive utilization of low-grade phosphate rock.
下载: