高硫砷钨矿石脱硫降砷浮选试验研究

Flotation Study of Sulfur and Arsenic Reducing on Tungsten Ore Bearing High Sulfur and Arsenic

对某含Mo 0.55%、Bi 0.79%、Cu 0.66%、Zn 2.25%、S 15.95%、As 2.58%、WO_3 35.84%的钨矿石进行了脱硫降砷浮选试验研究。该矿石由主干流程重选产出的-0.3 mm高含硫砷硫化物的细粒钨粗精矿。根据矿石的性质,采用硫砷混合浮选工艺流程。硫砷混合浮选时,采用高效的活化剂BK546B替代传统的硫酸,不仅有利于钨精矿中硫、砷杂质的脱除,更重要的是可改善因使用硫酸而造成的操作不便和不良的作业环境;采用选硫特效捕收剂AT608A与丁基黄药组合,有利于提高硫、砷的脱除率,并降低钨精矿中硫、砷杂质的含量,提高钨精矿品质。闭路试验获得含WO_3 55.64%、含硫0.38%、含砷0.088%、WO_3回收率为99.34%的钨精矿;而硫砷精矿中的WO_3含量仅为0.66%,WO_3在硫砷精矿中的损失率为0.66%。实现了钨精矿的高效脱硫降砷,并解决了困扰企业生产经营的难题。

The flotation separation of tungsten ore with 0.55% Mo, 0.79% Bi, 0.66% Cu, 2.25% Zn, 15.95% S, 2.58% As and 35.84% WO3, which was obtained from trunk flowsheet with gravity concentration of a tungsten concentrator, was studied. According to the ore property, The sulfur-arsenic mixed flotation process was adopted. An efficient activator BK546 B as a substitute for conventional sulfuric acid was used not only to improve the removal of sulfur and arsenic in tungsten concentrates, more important to improve the inconvenience of operation and unhealthy working environment caused by using sulfuric acid;the combined effective collector AT608 A and butyl xanthate were used to remove sulfur and arsenic minerals from tungsten concentrates, and reduce the contents of sulfur and arsenic in tungsten concentrates and improve the quality of the tungsten concentrates. The results of the closed circuit test show that a tungsten concentrate can be obtained with WO3 grade 55.64%, S grade 0.38%, As grade 0.088% and WO3 recovery rate of 99.34%, and 0.66% of WO3 content and 0.66% of WO3 loss in the sulfur and arsenic concentrates are achieved separately. It can be achieved the effective removal of the sulfur and arsenic minerals from the tungsten ore by using the new process studied, and solve the difficulty of production and management.