Interphase migration and enrichment of lead and zinc during copper slag depletion  

铜渣贫化过程中铅和锌的相间迁移和富集

作　　者：Jun HAO Zhi-he DOU Xing-yuan WAN Ting-an ZHANG Kun WANG 郝君;豆志河;万兴元;张廷安;王坤(东北大学多金属共生矿冶金教育部重点实验室,沈阳110819;东北大学冶金学院,沈阳110819)

机构地区：[1]Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Education,Northeastern University,Shenyang 110819,China [2]School of Metallurgy,Northeastern University,Shenyang 110819,China

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第9期3029-3041,共13页中国有色金属学报（英文版）

基　　金：supported by the Fundamental Research Funds for Central Universities,China(No.N2025004);the National Natural Science Foundation of China(Nos.U2102213,U1702253,52204419);Major Science and Technology Project of Liaoning Province,China(No.2021JH1/10400032);Major Science and Technology Project of Guangxi Province,China(No.2021AA12013);Liaoning Natural Science Foundation,China(No.2022-BS-076)。

摘　　要：An interphase migration and enrichment model of lead and zinc during molten copper slag depletion was established.The occurrence of various components in copper slag was predicted using sulfur-oxygen potential calculations and confirmed through high-temperature experiments.The recovery rate of copper can reach 90.13%under the optimal conditions of 1200°C,an iron to silicon mass ratio of 1.0,3 wt.%ferrous sulfide,and a duration of 45 min.Lead(54.07 wt.%)and zinc(17.42 wt.%)are found in the flue dust as lead sulfate,lead sulfide,and zinc oxide,while copper matte contains lead(14.44 wt.%)and zinc sulfide(1.29 wt.%).The remaining lead and zinc are encapsulated as oxides within the fayalite phase.建立铅和锌在熔融铜渣贫化过程中不同物相间的迁移和富集规律模型。通过硫氧势图计算预测铜渣中不同组分的赋存状态,并通过高温实验进行了验证。在1200°C、当铁硅质量比1.0,硫化亚铁3%(质量分数)、熔炼时间45 min的条件下,铜回收率可达90.13%。铅(54.07%,质量分数)和锌(17.42%,质量分数)以硫酸铅、硫化铅和氧化锌的形式进入烟尘,并以铅单质(14.44%,质量分数)和硫化锌(1.29%,质量分数)的形式进入铜锍。剩余的铅和锌以氧化物的形式被包裹在铁橄榄石相中。

关 键 词：depletion LEAD copper slag STIRRING ZINC 

分 类 号：TF811[冶金工程—有色金属冶金]