Thermodynamic simulation of complex Pb-Bi concentrate oxidative bath smelting process  

复杂铅铋精矿氧化熔池熔炼过程的热力学模拟

作　　者：Lin CHEN Peng CHEN Du-chao ZHANG Wei-feng LIU Tian-zu YANG 陈霖;陈鹏;张杜超;刘伟锋;杨天足(中南大学冶金与环境学院,长沙410083;中南大学难冶有色金属资源高效利用国家工程实验室,长沙410083)

机构地区：[1]School of Metallurgy and Environment,Central South University,Changsha 410083,China [2]National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第4期1165-1174,共10页中国有色金属学报（英文版）

基　　金：financial supports from the National Key R&D Program of China (2018YFC1901604);the Natural Science Foundation of Hunan Province,China (2018JJ3662);the China Scholarship Council (201706375005);the China Postdoctoral Science Foundation (2018M632988)。

摘　　要：The element partitioning in a Pb-Bi concentrate oxygen-rich bath smelting process was studied using thermodynamic equilibrium simulation method. Effects of oxygen to feed ratio(OFR) and sulfur dioxide partial pressure(pSO2) on the partitionings of Bi, Pb, As, Sb, Cu and Ag were analyzed and compared with industrial data. The results suggested that the optimal OFR was between 6.3 and 6.8 kmol/t to maximize Bi, Pb, Cu and Ag partitioning in the metal phase. Further increase of OFR led to the drop of metal partitioning and increase of slag liquidus temperature. High pSO2 led to high deportment of Bi and Pb in the gas phase mainly in the form of sulfides, suggesting that a low pSO2 was conducive for reducing the dust ratio.采用热力学平衡模拟方法研究复杂铅铋精矿富氧熔池熔炼过程中的元素分配行为,分析氧料比(OFR)和硫分压(pSO2)对Bi、Pb、As、Sb、Cu和Ag分配行为的影响,并对比模拟计算结果与工业数据。结果表明,该过程中OFR在6.3~6.8kmol/t之间有利于最大化Bi、Pb、Cu和Ag在金属相中的分配,进一步增加OFR将导致金属相分配率下降和渣液化温度提高。此外,高pSO2将导致Bi和Pb以硫化物形式大量分配至烟尘相,这表明低pSO2有利于降低过程烟尘率。

关 键 词：complex Pb-Bi concentrate oxygen-rich bath smelting multiphase equilibrium simulation element partitioning process parameter optimization 

分 类 号：TF817[冶金工程—有色金属冶金]