浮选法从某尾矿中回收硫的试验研究

为了对某选矿尾矿进行回收利用，在矿石工艺矿物学研究的基础之上，通过浮选系列试验研究，确定了浮选回收硫的最佳工艺流程及工艺指标。采用一次粗选、一次扫选、扫选中矿再精选的试验流程，粗选丁基黄药用量为300 g/t，MIBC 60 g/t，CaO调浆至pH值为8.5；扫选丁基黄药150 g/t，MIBC 30 g/t；精选不加药的条件下，得到硫品位35.95%，回收率65.12%的硫精矿及硫品位20.86%，回收率9.64%的硫中矿。

Experimental Study on Recovering Sulphur from a Tailing by Flotation

To make a recycling of a beneficiation tailing,an optimal process and process indexes for recovering sulfur were determined based on the process mineralogical study and a series of flotation tests.The test flowsheet consisting of one roughing,one scavenging and a re-concentration of scavenging middlings adopted 300g/t butyl xanthate,60 g/t MIBC and CaO to adjust the pH value to 8.5 in the roughing,and 150 g/t butyl xanthate and 30 g/t MIBC in the scavenging,with no reagent added to the cleaning.As a result,a sulfur concentrate grading 35.95% at a recovery of 65.12% and a sulfur middling grading 20.86% at a recovery of 9.64% were obtained.