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有色金属(冶炼部分):2013,(4):3-7
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炼铜烟灰碱浸脱砷的热力学及动力学
吴玉林,徐志峰,郝士涛
(铜陵有色集团控股有限公司技术中心,江西理工大学 冶金与化学工程学院,江西理工大学 冶金与化学工程学院)
Thermodynamics and Kinetics of Alkaline Leaching of Arsenic in Copper Smelting Dust
WU Yu-lin,XU Zhi-feng and HAO Shi-tao
(Technology Center,Tongling Nonferrous Metals Group Holding Co,Ltd,,)
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投稿时间:2012-10-30     修订日期:2012-10-30     录用日期:2012-10-31     网络发布日期:2013-03-22
中文摘要: 基于热力学计算,绘制了常温(298 K)条件下Me-S-H2O系(Me:Cu,Pb,Zn,As)Eh-pH图,并对pH=13~15时As2S3、CuS、Cu2S、PbS、ZnS热力学稳定区进行分析。结果表明,在碱浸体系中,砷与铜、铅、锌等有价金属的分离在热力学上是可行的。基于NaOH与(NaOH Na2S)两种体系中砷的浸出行为研究,为提高铜烟灰碱浸脱砷效率,选择(NaOH Na2S)浸出体系是适宜的。在该体系中,在303~363 K范围内,铜烟灰中砷的浸出过程受内扩散控制,浸出动力学方程遵循未反应收缩核模型。
中文关键词: 炼铜烟灰  砷  碱浸  热力学  动力学
Abstract:Eh-pH diagram of Me-S-H2O system (Me: Cu, Pb, Zn, As) at 298 K was plotted and the stable area of As2S3, CuS, Cu2S, PbS and ZnS was analyzed in the pH field of 13~15 based on thermodynamic calculation. The results show that separation of arsenic from copper, lead and zinc in alkaline leaching is feasible in terms of thermodynamics. The leaching behavior of arsenic in NaOH and NaOH Na2S system was studied respectively and the results show that NaOH Na2S system is appropriate for the removal of arsenic by alkaline leaching. The dissolution of arsenic in this system under the temperature of 303~363 K is controlled by inner diffusion and its leaching kinetic equation follows the unreacted shrinking core model.
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基金项目:江西省自然科学基金资助项目(20122BAB20602)
引用文本:
吴玉林,徐志峰,郝士涛.炼铜烟灰碱浸脱砷的热力学及动力学[J].有色金属(冶炼部分),2013(4):3-7.
WU Yu-lin,XU Zhi-feng,HAO Shi-tao.Thermodynamics and Kinetics of Alkaline Leaching of Arsenic in Copper Smelting Dust[J].Nonferrous Metals (Extractive Metallurgy),2013(4):3-7.

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