青海某高硫铁矿弱磁精矿提铁降硫试验  

Experiment on Iron Increase and Desulfurization of a Low Intensity Magnetic Concentrate from High Sulfur Iron Ore from Qinghai

作　　者：廖军平 黄自力[1,2] 崔军 高斯 王福坤 叶子青 Liao Junping;Huang Zili;Cui Jun;Gao Si;Wang Fukun;Ye Ziqing(College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgy and Mineral Resources, Wuhan 430081, China;Qinghai NanchuanMeige Metal powder Exploiting Co.Ltd., Geermu 730000, China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081 [3]青海南川美格金属粉末开发有限公司,青海格尔木730000

出　　处：《金属矿山》2018年第6期80-84,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51272188)

摘　　要：青海某高硫弱磁选铁精矿铁品位为57.30%,硫品位高达9.35%,主要金属矿物是磁铁矿、磁黄铁矿,铁主要以磁铁矿形式存在,硫主要存在于磁黄铁矿中。为提高铁品位降低硫含量,采用先浮后磁流程进行了提铁降硫试验。结果表明,在磨矿细度为-0.038 5 mm占95.48%条件下,以硫酸为pH调整剂,CuSO_4+Na_2S+H_2C_2O_4为复合活化剂,高级黄药+丁铵黑药为捕收剂,经1粗2扫3精反浮选,反浮选精矿在磁场强度为47.75 kA/m条件下磁选,得到的最终铁精矿铁品位为66.57%、回收率为50.94%,硫品位降至0.82%,达到了用户要求,副产品硫精矿硫品位为53.27%、回收率为38.31%。There is 53.70% iron in a high sulfur low intensity magnetic concentrate from Qinghai,sulfur grade is up to9.35%. Main metallic ore is magnetite and pyrrhotite. Iron mainly in form of magnetite,sulfur mainly exists in pyrrhotite. In order to increase iron grade and decrease sulfur content,iron increase and sulfur decrease experiment was conducted. Results indicated that,at the grinding fineness of 95.48% passing 0.038 5 mm,with sulfuric acid as pH adjustment,CuSO_4＋Na_2S＋H_2C_2O_4 as compound activator,senior butyl xanthate and ammonium aerofloat as combination collector,via one roughing two scavenging three cleaning reverse flotation,reverse flotation concentrate endure low intensity magnetic separation at field intensity of 47.75 kA/m,final iron concentrate with iron grade of 66.57% and recovery of 50.94%,the sulfur grade decreased to 0.82%,which meet the requirements of users,by-product sulfur with sulfur grade of 53.27% and recovery of 38.31%.

关 键 词：铁 脱硫 反浮选 磁选 

分 类 号：TF845[冶金工程—有色金属冶金] TF803.21