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复杂铅铋精矿氧化熔池熔炼过程的热力学模拟

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

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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6.3～6.8 kmol/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.
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.

complex Pb-Bi concentrateoxygen-rich bath smeltingmultiphase equilibrium simulationelement partitioningprocess parameter optimization

陈霖、陈鹏、张杜超、刘伟锋、杨天足

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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

复杂铅铋精矿 富氧熔池熔炼 多相平衡模拟 元素分配 过程参数优化

National Key R&D Program of ChinaNatural Science Foundation of Hunan Province,ChinaChina Scholarship CouncilChina Postdoctoral Science Foundationvaluable discussion with Dr.Denis SHISHIN(PYROSEARCH,University of Queensland)is gratefully acknowledged

2018YFC19016042018JJ36622017063750052018M632988

2021

10.1016/S1003-6326(21)65569-3

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(4)
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