复杂金精矿矿物特性及焙烧预处理工艺研究  

Study of Mineral Characteristics and Roasting Pretreatment Technology of Complex Gold Concentrate

作　　者：贺秀珍[1] 钟清慎[1,2] 马玉天[1] 刘玉强[1,2] 

机构地区：[1]金川集团股份有限公司贵金属研究中心,甘肃金昌737100 [2]西安建筑科技大学冶金工程学院,西安710055

出　　处：《有色金属（冶炼部分）》2014年第8期38-41,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家科技支撑计划项目(2012BAE06B00);金川集团股份有限公司"十二五"重点科研项目(1305029)

摘　　要：对某复杂高砷金精矿进行了工艺矿物学研究,并考察了焙烧温度、时间和压缩空气流量对焙烧脱除砷、硫的影响.结果表明,该复杂金精矿为少硫化物型金精矿,主要矿物是黄铁矿、砷黄铁矿以及长石、石英等脉石矿物,金精矿中金主要以金单质或者金与硫（砷）化物、氧化物和脉石的包裹体存在.金颗粒粒径大多在1～3 μm,部分颗粒在1μm以下,少数较大颗粒粒度可达4～5 μm.当控制焙烧的温度、时间和压缩空气流量分别为650℃、45 min、150 L/h时,砷、硫的脱除率分别达到97％和98％以上.Process mineralogy of high arsenic bearing comtlex gold concentrate was investigated.The effects of roasting temperature and time,and compressed air flow on removal rates of arsenic and sulfur were studied.The results show that this complex gold ore concentrate contains fewer sulfides with main minerals of pyrite,arsenopyrite and gangue minerals such as feldspar and quartz.Gold in concentrate exists mainly as of element or gold and sulfur （arsenic） compound,oxide inclusions and gangue.Particle size of gold particles is mostly between 1～3 μm,part of particles is ＜1 μm,a few larger grain size can be up to 4～5 μm.Arsenic and sulfur removal rate is up to 97％ and 98％ above,respectively under the optimum conditions including roasting temperature of 650 ℃,roasting time of 45 min,and compressed air flow of 150 L/h.

关 键 词：复杂金精矿 工艺矿物学 氧化焙烧 砷 硫 

分 类 号：TF831[冶金工程—有色金属冶金] TD91[矿业工程—选矿]