焙烧氰化尾渣回收有价金属试验  

Study on Recovery of Valuable Metals from Roasting Cyanidation Residue

作　　者：孙留根[1] 黄海辉[1] 徐晓辉[1] 常耀超[1] 韦其晋[1] 

机构地区：[1]北京矿冶研究总院,北京100160

出　　处：《有色金属（冶炼部分）》2017年第2期15-18,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家高技术研究发展计划(863计划)项目(2011AA06A104)

摘　　要：研究采用高温氯化工艺回收焙烧氰化尾渣中的有价金属。结果表明,在氯化钙添加量7%、1 100℃焙烧2h的条件下,Au、Ag、Cu、Pb、Zn的挥发率分别达到97.52%、71.78%、85.92%、98.59%、93.81%。球团采用梯级烘干的干燥工艺,经40min干燥后,干球团落下强度>10次/0.5m,抗压强度90%>100N,基本符合回转窑进料的强度要求。Recovery of valuable metals from roasting cyanidation residue by high temperature chloridizing was investigated.The results show that volatilization rate of Au,Ag,Cu,Pb and Zn is 97.52%,71.78%,85.92%,98.59% and 93.81%,respectively under the conditions of CaCl2 addition of 7%,roasting temperature of 1 100℃,and roasting time of 2h.Gradient drying process was adopted to prevent pellet bursting and after 40 min drying,falling strength of dry pellets is10times/0.5mand compressive strength is 90%〉100N,both basically meeting the feeding requirement of rotary kiln.

关 键 词：氰化尾渣 高温氯化 有价金属 挥发率 梯级烘干 

分 类 号：TF803.12[冶金工程—有色金属冶金]