银金精矿的焙烧条件对焙砂中金银提取的影响  

Influence of Roasting Conditions for Silver gold Concentrate on Extracted Gold and Silver from Its Calcine

作　　者：徐盛明[1] 吴延军 沈国励[1] 池汝安[3] 徐景明[3] 

机构地区：[1]湖南大学化学化工学院,湖南长沙410082 [2]湖南省机电工程学院,湖南长沙410012 [3]清华大学核研院,中国北京100084

出　　处：《湖南大学学报（自然科学版）》1999年第6期27-32,共6页Journal of Hunan University:Natural Sciences

基　　金：中国有色金属工业总公司测试基金

摘　　要：在热分析(DTA-TG)的基础上对吉林某浮选银精矿的焙烧预处理过程进行了研究. 研究了焙烧温度、焙烧时间对银金精矿中硫、碳脱除率的影响,着重研究了有添加剂存在时焙烧工艺条件对银精矿焙砂的金银提取性能的影响,并探讨了添加剂在硫酸化焙烧过程中的作用.试验结果表明:有添加剂存在时的焙砂经稀硫酸预浸、其预浸渣再用硫脲法或氰化法浸金时,其金的浸出率将大于95 % ,银的总浸出率也分别达95 % 和90 % 以上,而未加添加剂时焙烧且其焙砂无稀硫酸预浸工序时的总浸银率仅70 %左右. 显然。A roasting process of silver gold complex concetrate from Jilin province based on thermoanalyses(DTA TG) was described.The influence of roasting temperature and roasting time as well as of the presence of an additive on desurphurization and decarburisation of the concentrate was investigated.The leaching performance of itscalcine with the solutions of thiourea and cyanide was simultaneously studied,and the action of the additive in the sulfating course of valuable elements was also discussed.The results indicated that following the pre leaching with a dilute sulfuric acid solution,the leaching gold efficiency of the roasted concentrate in the presence of the additive by thiourea and cyanide solutions can all excess 95 %,and the total leaching efficiency of silver can also reach 95 % and 90 %,respectivley.But if without the additive in the roasting charges and the following washing acid operation,total leaching efficiency of silver would be 70 % or so.Obviously,the additive had played a key role in the sulfating of valuable elements.

关 键 词：银精矿 金矿 硫酸化焙烧 提取 金 银 

分 类 号：TF831.026[冶金工程—有色金属冶金] TF832.026