含金高砷高硫精矿综合回收有价金属  

Comprehensive Recovery of Valuable Metals from Gold-bearing High-arsenic Sulfur Concentrates

作　　者：郭持皓[1] 徐晓辉[1] 常耀超[1] 韦其晋[1] 胡磊[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）》2015年第8期46-49,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：采用二段焙烧—氯化挥发工艺从含金高砷高硫精矿中综合回收有价金属。结果表明,一段弱氧化700℃,二段强氧化850℃条件下,砷和硫的脱除率分别到97.6%和99%;在烧渣磨矿粒度-0.038mm占73%、配5%CaCl2、2%膨润土制团后在1 250℃氯化焙烧2h的条件下,金、银、铅、锌的挥发率分别为96.5%、73.3%、94.6%和75.3%,球团铁品位在60%以上,球团强度>2 500N。Valuable metals were comprehensively recovered from gold-bearing high-arsenic sulfur concentrates with high-temperature two-stage roasting followed by chloride volatilization.The results show that arsenic and sulfur removal rate is 97.6% and 99% respectively under the optimum two-stage roasting conditions including 700 ℃ weak oxidation atmosphere for the first stage and 850 ℃ oxidation atmosphere for the second stage.Volatilization rate of gold,silver,lead and zinc is 96.5%,73.3%,94.6% and 75.3%respectively,iron pellets compressive strength is 2 500 Nabove with iron grade of 60%above under the optimum chloride volatilization conditions including grinding size of calcine of 73%-0.038 mm,CaCl2dosage of 5%,bentonite dosage of 2%,chloride roasting temperature of 1 250 ℃,and time of 2h.

关 键 词：含金高砷高硫精矿 二段焙烧 脱砷 氯化挥发 铁球团 

分 类 号：TF803.2[冶金工程—有色金属冶金]