贵州某高硫低品位锑矿选矿试验研究

针对贵州某高硫低品位硫化—氧化锑矿进行了选矿试验研究,试验采用新型组合抑制剂HY1-1作为黄铁矿抑制剂,硝酸铅作为辉锑矿活化剂,乙硫氮作为捕收剂。浮选尾矿采用分级—摇床流程回收氧化锑矿。全流程闭路试验获得含锑45.48%的锑精矿1和含锑23.67%的锑精矿2,精矿总回收率为82.61%。

国外某金锑矿选矿试验研究

对国外某金锑矿进行了详细的工艺矿物学研究,查明矿石中主要矿物为脆硫锑铅矿及黄铁矿,金以自然金形态存在,主要赋存于脆硫锑铅矿中,其次赋存于黄铁矿中。对矿石进行了混合浮选试验研究,结果表明:在磨矿粒度为-0.074 mm粒级占80%条件下,混合浮选闭路试验能获得锑、铅、金品位分别为15.12%、18.50%、51.34 g/t,锑、铅、金回收率分别为86.14%、83.78%、90.35%的混合精矿。采用碳酸钠和YP的组合抑制剂能较好地对混合浮选精矿进行锑硫分离。

陕西商南某锑矿选矿试验研究

根据矿石性质进行了锑硫分离回收有价元素锑的选矿试验研究。结果表明:采用糊精抑制黄铁矿,可达到锑硫分离的目的;采用混合型捕收剂,既提高了锑精矿的品位(51.76%),又保证了锑精矿的回收率(76.08%)。

Separation of arsenic and antimony from dust with high content of arsenic by a selective sulfidation roasting process using sulfur

The separation of arsenic and antimony from dust with high content of arsenic was conducted via a selective sulfidation roasting process.The factors such as roasting temperature,roasting time,sulfur content and nitrogen flow rate were investigated using XRD,EPMA and SEM-EDS.In a certain range,the sulfur addition has an active effect on the arsenic volatilization because the solid solution phase（（Sb,As）2O3）in the dust can be destroyed after the Sb component in it being vulcanized to Sb2S3 and this generated As2O3 continues to volatile.In addition,an amorphization reaction between As2O（3 ）and Sb2O（3 ）is hindered through the sulfidation of Sb2O3,which is also beneficial to increasing arsenic volatilization rate.The results show that volatilization rates of arsenic and antimony reach 95.36%and only 9.07%,respectively,under the optimum condition of roasting temperature of 350℃,roasting time of 90 min,sulfur content of 22%and N2 flow rate of 70 m L/min.In addition,the antimony in the residues can be reclaimed through a reverberatory process.