锌冶炼渣搭配铅精矿侧吹还原熔炼直接炼铅渣型理论研究  

Fundamental Research on Slag Type of Zinc Leaching Residue with Lead Concentrate in Lead Smelting by Side Blowing Reduction

作　　者：杨伟 何勇毅 代龙果 李玉虎 张忠堂[2] 曹才放[2] YANG Wei;HE Yong-yi;DAI Long-guo;LI Yu-hu;ZHANG Zhong-tang;CAO Cai-fang(Research Institute of Mining and Metallurgy,Yunnan Chihong Zinc&Germanium Co.,Ltd.,Qujing 655000,Yunnan,China;School of Metallurgy Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]云南驰宏锌锗股份有限公司矿冶研究院,云南曲靖655000 [2]江西理工大学冶金工程学院,江西赣州341000

出　　处：《有色金属（冶炼部分）》2021年第6期10-17,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(52004111,51864019);江西省重点研发计划重点项目(20192ACB70017)。

摘　　要：以FeO-Fe_(2)O_(3)-SiO_(2)-CaO-ZnO-PbO渣系为研究对象,采用热力学软件FactSage计算温度、Fe/SiO_(2)(质量比)、CaO/SiO_(2)(质量比)、ZnO含量及PbO含量等因素对炉渣熔化温度及液相生成区的影响。热力学分析表明,随着Fe/SiO_(2)的增大,炉渣熔化温度减小,随着CaO/SiO_(2)的提升呈先减小后增大的趋势。炉渣中ZnO含量在10%~18%变化时,炉渣的熔化温度变化较大。随着ZnO含量的增加,炉渣的液相区有所减小,当渣中ZnO含量低于12%时,可保证还原熔炼的顺利进行。验证试验表明,在熔炼温度1 200~1 250℃、CaO/SiO_(2)=0.5、Fe/SiO_(2)=0.9、ZnO含量12%的条件下,采用侧吹还原熔炼处理液态高铅渣可顺利进行,熔炼过程金属直收率为85%,渣中铅含量为2.06%。Phase diagrams of FeO-Fe_(2)O_(3)-SiO_(2)-CaO-ZnO-PbO slag system were calculated with FactSage thermodynamics software.Effects of temperature,Fe/SiO_(2)(mass fraction),CaO/SiO_(2)(mass fraction),ZnO content,and PbO content on melting temperature and liquid phase generation zone of slag were investigated.Thermodynamic analysis shows that melting temperature of slag drops with increase of Fe/SiO_(2),and drops first and rises later with increase of CaO/SiO_(2).When ZnO content in slag is 10%-18%,melting temperature of slag varies greatly.However,liquid phase area of slag shows a decreasing trend as content of ZnO rises.Under the premise of ensuring smooth progress of smelting process,content of ZnO in slag can be controlled to be lower than 12%.Verification experiment shows that under the conditions of1 200-1 250℃,CaO/SiO_(2)=0.5,Fe/SiO_(2)=0.8,and ZnO content of 12%,treating of liquid high-lead slag using side blowing reduction smelting can proceed smoothly,metal direct recovery rate during reduction is 85%,and lead content in reduced slag is 2.06%.

关 键 词：侧吹 搭配熔炼 高铅渣 熔化温度 热力学 

分 类 号：TF812[冶金工程—有色金属冶金] TF813