氧压浸出处理低铁闪锌矿  

Oxygen Pressure Leaching on Low Iron Sphalerite

作　　者：古岩[1] 张廷安[1] 吕国志[1] 牟望重[1] 豆志河[1] 

机构地区：[1]东北大学材料与冶金学院,多金属共生矿生态化利用教育部重点试验室,沈阳110819

出　　处：《有色金属（冶炼部分）》2011年第10期1-5,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51004033,50974035,51074047);国家“十一五”科技支撑计划项目(2008BAB34B01);教育部高校博士点专项基金项目(20050145029);辽宁省优秀青年科技人才基金项目(2005221012)

摘　　要：以低铁闪锌矿精矿为原料,采用氧压浸出技术进行处理。绘制了150℃、1.0 MPa的ZnS-H2O系电位-pH图。通过单因素试验确定各因素的影响趋势,采用ICP、XRD、XRF和BET等检测方法对浸出液和浸出渣进行分析表征,确定最佳浸出条件为:精矿粒度-0.075 mm～+0.055 mm、浸出温度150℃、氧分压0.8 MPa、初酸浓度15%、浸出时间90 min、浸出液固比6∶1～8∶1、搅拌转速500 r/min、添加剂用量1.0%。在此条件下,锌浸出率在97%以上,硫转化率达到90%,实现了精矿中锌的充分浸出与渣中元素硫的富集。Oxygen pressure leaching process was applied to treat low iron sphalerite concentrate.Eh-pH diagram of ZnS-H2O system at 150 ℃ and 1.0 MPa was drew.The single factor experiments were performed in autoclave,the leachate and residue were characterized by ICP,XRD,XRF and BET.The results indicate when particle size is-0.075 mm～＋0.055 mm,temperature is 150 ℃,oxygen partial pressure is 0.8 MPa,initial acid concentration is 15%,leaching time is 90 min,leaching liquid-solid ratio is 6∶1～8∶1,stirring speed is 500 r/min,and additive amount is 1.0%,extraction rate of zinc is above 97% and conversion rate of sulfur is about 90%.Sufficiently leaching of zinc and enriching of element sulfur in the residue were achieved via the process.

关 键 词：低铁闪锌矿 氧压浸出 电位-PH图 浸出率 元素硫 

分 类 号：TF813[冶金工程—有色金属冶金] TF803.21