某高硫砷难处理金矿石选矿试验研究  

Experimental Study on Beneficiation of a High Sulfur and Arsenic Refractory Gold Ore

作　　者：潘彦岑 靳建平[1,2] 李艳军 董再蒸[1,2] PAN Yancen;JIN Jianpin;LI Yanjun;DONG Zaizheng(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819

出　　处：《金属矿山》2024年第1期220-225,共6页Metal Mine

基　　金：国家自然科学基金面上项目(编号:52074068);辽宁省博士启动基金项目(编号:2021-BS-059)。

摘　　要：某高硫砷金矿石金、银品位分别为2.90 g/t和59.00 g/t,As含量为6.06%、S含量为5.20%。矿石中金矿物粒度较细,均为显微金与细粒金,其与黄铜矿、磁黄铁矿等硫化矿连生于毒砂中,单体解离困难。为进一步实现高硫砷难处理金矿的高效利用,在矿石工艺矿物学研究的基础上,进行了浮选和氰化浸出试验研究,确定采用浮选—氰化浸出的联合工艺流程进行试验。结果表明:适宜药剂制度下,原矿在磨矿细度为-0.074 mm占75%时,进行1次粗选试验,粗精矿再磨至-0.038 mm占99%时,进行2粗2精浮选—1次硫砷分离流程试验。最终获得金品位为17.19g/t、金回收率为79.06%,银品位为269.00 g/t、银回收率为68.73%的金精矿。将浮选尾矿磨至-0.010 mm占86%时,采用氰化浸出工艺处理,金浸出率为22.22%,银浸出率为57.78%。选冶综合金回收率达到83.71%,银回收率达到了86.80%,实现了金、银的有效回收利用。A high sulfur and arsenic gold ore contains gold of 2.90 g/t and silver of 59.00 g/t with As content of 6.06%and S content of 5.20%.The particle size of gold minerals in the ores are fine,which are all microscopic gold and fine grained gold,associated with sulfide minerals such as chalcopyrite and pyrrhotite in arsenopyrite,causing difficult in monomer dissocia-tion.In order to further realize the efficient utilization of refractory gold ores with high sulfur and arsenic,flotation and cyanide leaching tests were carried out on the basis of ore process mineralogy research,and the combined process flow of flotation and cyanide leaching was determined to carry out the tests.The test results indicated that under the best reagent system,when the fineness of the raw ore is-0.074 mm accounting for 75%,one roughing test is carried out.When the coarse concentrate is ground to-0.038 mm accounting for 99%,test of two scavenging and two cleaning,and once sulfur and arsenic separation was carried out.The final gold grade is 17.19 g/t,and the gold recovery is 79.06%with a silver grade of 269.00 g/t and a silver re-covery of 68.73%.When the flotation tailings were ground to-0.010 mm accounting for 86%,the cyanide leaching process was used to treat the flotation tailings,and the gold leaching rate was 22.22%and silver leaching rate was 57.78%.The recovery rate of gold and silver reached 83.71%and 86.80%respectively,realizing the effective recovery and utilization of gold and silver.

关 键 词：难处理金矿石 浮选 高硫高砷 氰化浸出 

分 类 号：TD91[矿业工程—选矿]