含锡抑硫浮锌尾矿FS活化浮硫试验

云南某锡矿选矿厂采用抑硫浮锌—硫酸活化浮硫—浮硫尾矿选锡流程回收矿石中的主要有用元素锡、锌、硫。硫酸活化浮硫不仅腐蚀搅拌桶、浮选机等矿浆存储及输送设备,而且与矿物作用还会释放有毒的硫化氢气体,造成环境污染。为解决此问题,武汉理工大学相关课题组有针对性地研制出一种新型药剂FS,可替代硫酸活化现场被抑制的硫。试验对以FS为活化剂的脱硫工艺条件进行了研究。结果表明,硫、锡品位分别为21.24%、11.43%的试样,以FS+硫酸铜为活化剂,丁基黄药为捕收剂,2#油为起泡剂,经1粗1精1扫闭路流程处理,可获得硫品位为36.57%、含锡0.60%、硫回收率为97.76%的硫精矿,以及锡品位为25.66%、含硫1.10%、锡回收率为97.03%的脱硫产品,较好地实现了硫锡分离。新型药剂FS与硫酸铜的组合使用,不仅解决了设备的腐蚀问题,而且降低了药剂消耗,消除了硫化氢气体对环境的污染。

FS Activated Sulfur Flotation Tests for Tin-containing Tailings of Inhibiting Sulfur and Floating Zinc

A tin ore dressing plant in Yunnan adopts the process of floating zinc and suppressing sulfur-floating sulfur by sulfate activation-tin concentration from sulfur floating tailings to recover major useful elements of tin,zinc,and sulfur.Sulfuric acid activated floatation not only corrodes mixing tank,flotation machine and other slurry storage and transportation equipment,but also acted with the minerals,that will release toxic hydrogen sulfide gas,and cause environmental pollution.To solve this problem,the related research groups from Wuhan University of Technology targeted to develop a new type of reagent FS,which can replace the suppressed sulfur at the sulfuric acid activation site.The desulfurization conditions of FS as activator were studied.The results showed that for the sample with sulfur and tin grade of 21.24% and 11.43%,with FS + copper sulfate as activator,butyl xanthate as collector,2# oil as foaming agent,sulfur concentrate with sulfur grade of 36.57%,tin content of 0.60%,and sulfur recovery rate of 97.76%,and desulfurization product with Tin grade of 25.66%,sulfur content of 1.10%,and tin recovery rate of 97.03% were obtained separately by the closed-circuit process of one roughing,one cleaning and one scavenging.The separation of sulfur and tin are properly realized.The combination of new reagent FS with copper sulfate not only avoids from equipment corrosion,but also reduces the consumption of reagents.So it can eliminate the gas pollution from hydrogen sulfide.