辉锑矿锌源固硫直接炼锑反应机理研究  

Reaction Mechanism of Antimony Direct Smelting Applying Zinc Materials as Sulfur-fixing Agent

作　　者：王岳俊[1] 陈永明[2] 徐康宁[1] 叶龙刚[2] 薛浩天 王彩虹[1] WANG Yue-jun CHEN Yong-ming XU Kang-ning YE Long-gang XUE Hao-tian WANG Cai-hong(ScienceDepartment, Hetao College, Bayannur 015000, Inner Mongolia, China School of Metallurgy and Environment, Central South University, Changsha 410083, China)

机构地区：[1]河套学院理学系,内蒙古巴彦淖尔015000 [2]中南大学冶金与环境学院,长沙410083

出　　处：《有色金属（冶炼部分）》2016年第10期1-4,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51104182)

摘　　要：研究了硫化锑与氧化锌在Na_2CO_3-NaCl熔盐体系中的还原固硫直接炼锑反应机理。热力学计算表明,硫化锑与氧化锌的还原固硫反应在400℃以上可自发进行,在熔体中x(Sb_2S_3)和x(ZnO)都降至0.000 1时,碳气化反应的CO%也可满足还原所需的平衡气氛要求。在Sb_2S_3-ZnO-C体系中,硫化锑还原固硫反应分两步进行:Sb_2S_3首先与ZnO发生交互反应生成Sb_2O_3和ZnS,Sb_2O_3再被还原剂C或CO还原成Sb,从而以ZnS形式实现固硫。Reaction mechanism of antimony direct smelting by reduction and sulfur-fixing reaction between Sb2S3 and ZnO in Na2 CO3-NaCl molten salt was investigated. The results of thermodynamic calculation indicate that sulfur-fixing reaction can completely proceed at 400℃ above, CO% from gasification reaction of carbon can meet reduction and sulfur-fixing reaction even when mole concentration of Sb2S3 and ZnO in melt is both as low as 0. 000 1. In Sbz Sz-ZnO-C system, sulfur-fixing reaction is divided into two steps, reaction between Sb2S3 and ZnO to produce Sb2O2 and ZnS firstly, and then consecutive reduction of Sb2O3 to Sb by addition of reductive agent. SO2 smoke is discharged in form of ZnS.

关 键 词：锑冶金 固硫熔炼 反应机理 低温熔盐 

分 类 号：TF818[冶金工程—有色金属冶金]