氯化挥发法从含有价金属硫铁矿精矿中回收金银  

Recovery of Gold and Silver from Valuable Metal Bearing Pyritic Concentrate by Chlorination Volatilization Method

作　　者：刘慧南 胡杨甲 吴桂叶 赵志强 贺政 刘崇峻 LIU Hui-nan;HU Yang-jia;WU Gui-ye;ZHAO Zhi-qiang;HE Zheng;LIU Chong-jun(BGRIMM Technology Group,Beijing 100160,China;State Key Laboratory of Mineral Processing,Beijing 100160,China)

机构地区：[1]北京矿冶科技集团有限公司,北京100160 [2]矿物加工科学与技术国家重点实验室,北京100160

出　　处：《有色金属（冶炼部分）》2019年第12期44-48,91,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：“十二五”国家科技支撑计划项目（2015BAB13B02）;北京矿冶科技集团有限公司基金项目（JTKJ1820）

摘　　要：对某硫铁矿精矿进行有价金属回收的实验室小型试验及扩大连续试验。在氧化焙烧—润磨造球—氯化挥发的原则流程下,确定了实验室最佳试验条件:氧化脱硫焙烧温度700℃、焙烧时间1.0 h、无水氯化钙添加比例7.0%、焙砂再磨细度-0.038 mm占70%、氯化焙烧温度1100℃、焙烧时间1.0 h,在该条件下,氧化焙砂的砷脱除率为82.39%,硫脱除率为99.99%,金、银、铜的挥发率分别为96.37%、85.97%和70.61%,球团中铁的品位为61.03%。连续扩大试验结果表明,物料中金、银、铜的挥发率分别达到96.72%、90.91%和52.48%。Following the process of oxidation roasting,grinding and pelletizing,and chlorination volatilization,laboratory tests and scale-up pilot tests were carried out for recovering valuable metals from pyrite concentrate.Removal rate of arsenic and sulphur in oxidation roasting tests is 82.39%and 99.99%,respectively,and volatilization recovery of gold,silver and copper in chlorination volatilization tests is 96.37%,85.97%and 70.61%,respectively,under the optimum conditions of laboratory test including oxidation roasting temperature of 700℃,roasting time of 1.0 h,dosage of calcium chloride of 7.0%,particle size of 70%-0.038 mm,chlorination volatilization temperature of 1100℃,and chlorination volatilization time of 1.0 h.While during scale-up pilot tests,chlorination volatilization recovery of gold,silver and copper reaches 96.72%,90.91%and 52.48%respectively.

关 键 词：硫铁矿精矿 氧化焙烧 氯化挥发 金银回收 球团 

分 类 号：TF831[冶金工程—有色金属冶金] TF832