复杂含金银磁精矿酸性还原预处理试验研究  

Experimental study on acid reduction pretreatment for complex magnetic separation concentrates containing Au and Ag

作　　者：王成行 邱显扬 胡真 宋宝旭 Wang Chenghang;Qiu Xianyang;Hu Zhen;Song Baoxu(Guangdong Institute of Resources Comprehensive Utilization;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization;Guangdong Provincial Key Laboratory of Development&Comprehensive Utilization of Mineral Resources)

机构地区：[1]广东省资源综合利用研究所 [2]稀有金属分离与综合利用国家重点实验室 [3]广东省矿产资源开发和综合利用重点实验室

出　　处：《黄金》2018年第10期57-59,共3页Gold

基　　金：广东省科学院高端领军人才培育培养资助专项项目(2017GDASCX-0301);云南省科技创新强省计划项目(2015IB002)

摘　　要：针对某金矿矿石磁选所得磁精矿中金、银、铜等矿物工艺特性,进行了酸性还原预处理试验,考察了还原剂、硫酸用量等工艺参数对铜、锰浸出的影响,分析了金、银浸出率与锰浸出率的相应关系。结果表明:银与锰矿物关系密切,锰矿物包裹银是导致银直接氰化浸出率低的主要原因;在常温常压酸性溶液中,铁粉是较好的还原剂;银浸出率与锰浸出率呈正相关,锰浸出率为56. 86%时,银浸出率可达86. 02%,且酸性还原预处理对金浸出有促进作用。According to the technological characteristics of Au,Ag and Cu minerals in the magnetic separation concentrates obtained from magnetic separation of the gold ores from a gold mine,acid reduction pretreatment was carr-ied out.The influence of the technological parameters like reductant and sulfuric acid dosage on copper and manganese leaching was investigated and the relation between Au and Ag leaching rate and Mn leaching rate was analyzed.The results show that Ag and Mn minerals are closely related and Mn-coated Ag is major cause for low direct cyanidation leaching rate of Ag;Fe powder is a good reductant in acidic solution at room temperature and atmospheric pressure;the leaching rate of Ag can reach 86.02%while the leaching rate of Mn is 56.86%,exhibiting positive relation between the two,and acid reduction pretreatment can promote gold cyanide leaching.

关 键 词：预处理 磁精矿 金矿 矿物集合体 氰化 

分 类 号：TD952[矿业工程—选矿]