贵州某高砷锑矿石选矿试验

贵州某高砷锑矿石锑含量为0.61%、砷含量为1.02%，锑主要以辉锑矿形式存在，砷主要以毒砂形式存在。为给该矿石中锑、砷回收提供技术依据，对其进行了选矿试验。抑锑浮砷、锑砷混合浮选再分离、浮锑抑砷原则流程对比试验结果表明，浮锑抑砷工艺流程指标较好。在磨矿细度为-0.074 mm占92.78%条件下，采用浮锑抑砷工艺流程选锑，以水玻璃为抑制剂、硝酸铅为活化剂、丁铵黑药+乙硫氮为捕收剂、2号油为起泡剂，经1粗1精优先选锑，获得了锑品位为57.49%、回收率为79.52%的锑精矿，砷含量为0.54%，选锑尾矿经1粗2精2扫浮选流程选砷，获得的砷精矿砷品位为10.17%、金品位为29.16 g/t、砷回收率为82.79%、金回收率为80.98%，砷精矿中锑品位为1.04%，实现了砷锑的高效分离回收。

Beneficiation Experiment on a High Arsenic Antimony Ore from Guizhou

There is 0. 61% Sb and 1. 02% As in a high arsenic antimony ore from Guizhou. Antimony mainly occurs as stibnite,while arsenic occurs as arsenopyrite. To provide technique basis for the development of the ore,beneficiation experi-ment was conducted on the ore. Antimony depression and arsenic flotation process,arsenic and antimony bulk flotation and then separation process,antimony flotation and arsenic depression process comparison experiment results indicated that, antimony flotation and arsenic depression process index is relative well. At the grinding fineness of 0. 074 mm passing 92. 78%,by anti-mony preference flotation and arsenic depression process,using sodium silicate as depressor,lead nitrate as activator,diethyl dithiocarbamate and ammonium dibutyl dithiophosphate as collector,2# oil as frother,via one roughing and one cleaning antimo-ny preference flotation,antimony concentrate with antimony grade of 57. 49% and recovery of 79. 52% was obtained,the con-tent of arsenic decreased to 0. 54%,antimony tailings via one roughing-two cleaning-two scavenging arsenic flotation,arsenic concentrate with arsenic grade of 10. 17% and recovery of 82. 79%, gold grade of 29. 16 g/t and recovery of 80. 98%, and 1. 04% antimony was obtained,effective separation recovery of antimony and arsenic was realized.