陕西某金矿选矿试验研究

1.西安科技大学 化学与化工学院,陕西 西安 710054; 2.中国矿业大学 煤炭加工与高效洁净利用教育部重点实验室,江苏 徐州 221116; 3.国土资源部煤炭资源勘查与综合利用重点实验室,陕西 西安 710054

金矿; 浮选; 氰化浸出; 焙烧

Experimental research on mineral processing for a gold ore in Shaanxi Province
LIU Li-jun1,FU Yan-hong1,WANG Ji-zhen1*,LI Zhen1,2,3,YANG Chao1,YU Wei1

(College of Chemistry and Chemical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education,China University of Mining & Technology,Xuzhou 221116,China; 3.Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Ministry of Land and Resources,Xi'an 710054,China)

gold ores; flotation; cyanide leaching; roasting

DOI: 10.13800/j.cnki.xakjdxxb.2017.0118

备注

陕西某金矿石中金以微细粒浸染状分布在黄铁矿、毒砂及脉石矿物中,40.53%以单体和连生金形式存在,硫化物中金占33.04%,脉石中金占26.43%,直接氰化浸出效率极低,金的浸出率仅为43.83%.为实现该金矿资源的有效回收,根据该矿石性质,对比“原矿氰化浸出”进行了“原矿浮选—浮选精矿氰化浸出”以及“原矿浮选—浮选精矿焙烧—焙砂氰化工艺”3种工艺试验。试验结果表明,“原矿浮选—浮选精矿焙烧—焙砂氰化”的工艺可明显提高金的浸出率,金的浸出率可提高到69.24%,是处理该矿石的最佳方案。

The gold occurred as fine and dissemination in pyrite,arsenopyrite and gangue minerals in a gold ore in Shaanxi province.The gold occurred as crystal grain and under-liberated particles accounted for 40.53%; gold-bearing pyrite accounted for 33.04% and other 26.43% gold existed in the gangue minerals.The leaching rate of gold was very low if the process of cyanide leaching of crude mineral ores was adopted and the leaching rate was only 43.83%.Based on the ore properties,the flotation for crude mineral ores-cyanide leaching of flotation concentrate,and flotation for crude mineral ores-roasting for flotation concentrate-cyanide leaching for calcining were researched,and the results indicate the most suitable process for this gold ore is flotation for crude mineral ores-roasting for flotation concentrate-cyanide leaching for calcining,and an leaching rate of 69.24% has been reached.