脆硫锑铅矿熔盐冶炼过程Fe反应行为研究  

Research on Fe reaction behavior during smelting of jamesonite in molten salt

作　　者：农永萍 武威 叶有明 马皓皓 NONG Yongping;WU Wei;YE Youming;MA Haohao(Guangxi Key Laboratory of Green Preparation and Application of Inorganie Materials,Laibin 546100,China;College of Food and Biochemical Engineering,Guangxi Normal University of Science and Technology,Laibin 546100,China)

机构地区：[1]广西无机材料绿色制备与应用重点实验室,广西来宾546100 [2]广西科技师范学院食品与生化工程学院,广西来宾546100

出　　处：《中国有色冶金》2023年第5期94-104,共11页China Nonferrous Metallurgy

基　　金：广西自然科学基金项目(2020GXNSFAA159102);来宾市金属材料加工与清洁生产重点实验室(来科能193301);广西无机材料绿色制备与应用重点实验室培育建设项目(桂科AD20297139);2021年度广西无机材料绿色制备与应用重点实验室运行补助项目(21-220-09)。

摘　　要：本文研究脆硫锑铅矿低温熔盐冶炼过程中Fe的反应行为。通过模拟脆硫锑铅矿在Na_(2)CO_(3)-NaCl熔盐体系熔炼过程中的Fe反应过程,采用XRD分析FeS、FeS_(2)与ZnO、碳粉在同一体系熔炼过程中Fe的反应行为,并通过SEM-EDS表征脆硫锑铅矿熔炼得到的铅锑合金表面及断面的Fe元素分布。结果表明:在973 K条件下FeS与ZnO发生置换反应形成FeO,FeS_(2)与Na_(2)CO_(3)反应形成FeS与Na_(2)S;在1 073 K条件下FeS和FeS_(2)与ZnO、碳粉发生还原反应形成单质Fe、Fe_(3)O_4与ZnS;在1 173 K条件下FeS和FeS_(2)与ZnO、碳粉反应产物主要有ZnS、Fe、Fe_(2)O_(3)与Fe_(3)O_4。随温度升高或反应时间延长,FeS和FeS_(2)中Fe元素逐步被氧化为Fe、Fe_(3)O_4、Fe_(2)O_(3);Fe最终主要以熔渣形式从反应系统中排出。本研究可为脆硫锑铅矿在Na_(2)CO_(3)-NaCl体系低温熔炼中研究Fe的反应行为提供科学依据。In this paper,the reaction behavior of Fe of jamesonite in the process of low temperature molten salt smelting is studied.By simulating the reaction process of Fe of the jamesonite in the Na_(2)CO_(3)-NaCl molten salt system,XRD was used to analyze the reaction behavior of Fe in the smelting process of Fes,FeS_(2),ZnO and carbon powder in the same system.and the Fe distribution on the surface and cross section of the lead-antimony alloy obtained from the smelting of jamesonite was characterized by SEM-EDS.The results show that FeS reacts with ZnO to form FeO,and FeS_(2) reacts with Na_(2)CO_(3)to form FeS and Na_(2)S at 973 K.At 1073 K,FeS and FeS_(2) are reduced with ZnO and carbon powder to form Fe,Fe_(3)O_(4) and Zns.At 1173 K,the reaction products of FeS and FeS_(2) with ZnO and carbon powder mainly include ZnS,Fe,Fe_(3)O_(4) and Fe_(2)O_(3).Fe elements in FeS and FeS_(2)are gradually oxidized to Fe,Fe_(3)O_(4) and Fe_(2)O_(3) with the increase of temperature or the extension of reaction time.Fe is eventually expelled from the reaction system mainly in the form of slag.The study can provide scientific basis for studying the reaction behavior of Fe of jamesonite in low temperature melting of Na_(2)CO_(3)-NaCl system.

关 键 词：脆硫锑铅矿 低温熔炼 FE 反应行为 锑铅合金 熔盐 置换 还原 

分 类 号：TF818[冶金工程—有色金属冶金] TF801