硫化锑精矿CO_(2)顶吹固硫熔炼新工艺  

Sulfur-fixation smelting process for antimony sulfide concentrate by CO_(2) top blowing

作　　者：丁瑞泽 杨建广 朱强 南天翔 谢雪珍 叶有明 DING Rui-ze;YANG Jian-guang;ZHU Qiang;NAN Tian-xiang;XIE Xue-zhen;YE You-ming(School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China;Guangxi Science&Technology Normal University,Laibin 546199,China)

机构地区：[1]中南大学冶金与环境学院,长沙410083 [2]广西科技师范学院,来宾546199

出　　处：《中国有色金属学报》2023年第3期862-872,共11页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(52074362);广西自然科学基金资助项目(2020GXNSFBA159028);湖南省高新技术产业科技创新引领计划(2021GK4004);中南大学中央高校基本科研业务费专项资金资助项目(2021ZZTS0623)。

摘　　要：针对现行锑火法冶炼工艺熔炼温度高、能耗大以及环境污染等问题,提出了一种以氧化锌为固硫剂、碳酸钠为熔盐的CO_(2)顶吹固硫熔炼新工艺。采用单因素条件法考察了熔炼温度、CO_(2)流量、熔盐组成、固硫剂和还原剂加入量对辉锑矿中金属直收率和氧化锌固硫率的影响。得到的最优工艺条件如下:熔炼温度为1223 K、CO_(2)流量为0.3 L/min、熔盐为Na_(2)CO_(3)、煤粉加入量为煤粉所需理论添加量的2倍、ZnO加入量为ZnO所需理论添加量的1.3倍。在此最优工艺条件下进行综合扩大实验,锑的直收率达到91.83%,总固硫率达到97.8%。In view of serious drawbacks existing in current antimony pydrometallurgical process,such as a high smelting temperature,large energy consumption and serious environmental pollution,a novel sulfur-fixation smelting process for extracting antimony from stibnite concentrate by top blow of CO_(2) into the sodium molten salt was presented,using ZnO as sulfur-fixing agent.The influencing factors,including the melting temperature,CO_(2) flow,composition of molten salt,and dosage of carbon and ZnO,were investigated in detail by single factor experiments.The optimum parameters are that temperature is 1223 K,CO_(2) flow amount is 0.3 L/min,molten salt is Na_(2)CO_(3),mass ratio of carbon addition to theory amount is 2,mass ratio of ZnO addition to theory amount is 1.3,the direct recovery of antimony reaches 91.83%,and the sulfur capture capacity reaches 97.8%.

关 键 词：硫化锑精矿 CO_(2) 低温熔盐 固硫 清洁冶金 

分 类 号：TF818[冶金工程—有色金属冶金]