Extraction of arsenic from arsenic-containing cobalt and nickel slag and preparation of arsenic-bearing compounds
文献类型：期刊论文
| 作者 | Yu, Guo-lin1,2; Zhang, Ying2; Zheng, Shi-li2; Zou, Xing1; Wang, Xiao-hui2; Zhang, Yi2 |
| 刊名 | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
 |
| 出版日期 | 2014-06-01 |
| 卷号 | 24期号:6页码:1918-1927 |
| 关键词 | arsenic-containing cobalt and nickel slag alkaline leaching cooling crystallization sodium arsenate arsenic trioxide |
| ISSN号 | 1003-6326 |
| 其他题名 | Trans. Nonferrous Met. Soc. China |
| 中文摘要 | The arsenic extraction from the arsenic-containing cobalt and nickel slag, which came from the purification process of zinc sulfate solution in a zinc smelting factory, was investigated. The alkaline leaching method was proposed according to the mode of occurrence of arsenic in the slag and its amphoteric characteristic. The leaching experiments were conducted in the alkaline aqueous medium, with bubbling of oxygen into the solution, and the optimal conditions for leaching arsenic were determined. The results showed that the extraction rate of arsenic was maximized at 99.10% under the optimal conditions of temperature 140 degrees C, NaOH concentration 150 g/L, oxygen partial pressure 0.5 MPa, and a liquid-to-solid ratio 5:1. Based on the solubilities of As2O5, ZnO and PbO in NaOH solution at 25 degrees C, a method for the separation of As in the form of sodium arsenate salt from the arsenic-rich leachate via cooling crystallization was established, and the reaction medium could be fully recycled. The crystallization rate was confirmed to reach 88.9% (calculated on the basis of Na3AsO4) upon a direct cooling of the hot leachate down to room temperature. On the basis of redox potentials, the sodium arsenate solution could be further reduced by sulfur dioxide (SO2) gas to arsenite, at a reduction yield of 92% under the suitable conditions. Arsenic trioxide with regular octahedron shape could be prepared successfully from the reduced solution, and further recycled to the purification process to purify the zinc sulfate solution. Also, sodium arsenite solution obtained after the reduction of arsenate could be directly used to purify the zinc sulfate solution. Therefore, the technical scheme of alkaline leaching with pressured oxygen, cooling crystallization, arsenate reduction by SO2 gas, and arsenic trioxide preparation, provides an attractive approach to realize the resource utilization of arsenic-containing cobalt and nickel slag. |
| 英文摘要 | The arsenic extraction from the arsenic-containing cobalt and nickel slag, which came from the purification process of zinc sulfate solution in a zinc smelting factory, was investigated. The alkaline leaching method was proposed according to the mode of occurrence of arsenic in the slag and its amphoteric characteristic. The leaching experiments were conducted in the alkaline aqueous medium, with bubbling of oxygen into the solution, and the optimal conditions for leaching arsenic were determined. The results showed that the extraction rate of arsenic was maximized at 99.10% under the optimal conditions of temperature 140 degrees C, NaOH concentration 150 g/L, oxygen partial pressure 0.5 MPa, and a liquid-to-solid ratio 5:1. Based on the solubilities of As2O5, ZnO and PbO in NaOH solution at 25 degrees C, a method for the separation of As in the form of sodium arsenate salt from the arsenic-rich leachate via cooling crystallization was established, and the reaction medium could be fully recycled. The crystallization rate was confirmed to reach 88.9% (calculated on the basis of Na3AsO4) upon a direct cooling of the hot leachate down to room temperature. On the basis of redox potentials, the sodium arsenate solution could be further reduced by sulfur dioxide (SO2) gas to arsenite, at a reduction yield of 92% under the suitable conditions. Arsenic trioxide with regular octahedron shape could be prepared successfully from the reduced solution, and further recycled to the purification process to purify the zinc sulfate solution. Also, sodium arsenite solution obtained after the reduction of arsenate could be directly used to purify the zinc sulfate solution. Therefore, the technical scheme of alkaline leaching with pressured oxygen, cooling crystallization, arsenate reduction by SO2 gas, and arsenic trioxide preparation, provides an attractive approach to realize the resource utilization of arsenic-containing cobalt and nickel slag. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | REDUCTION |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000339278400038 |
| 公开日期 | 2014-08-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/11017]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Guo-lin,Zhang, Ying,Zheng, Shi-li,et al. Extraction of arsenic from arsenic-containing cobalt and nickel slag and preparation of arsenic-bearing compounds[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2014,24(6):1918-1927. |
| APA | Yu, Guo-lin,Zhang, Ying,Zheng, Shi-li,Zou, Xing,Wang, Xiao-hui,&Zhang, Yi.(2014).Extraction of arsenic from arsenic-containing cobalt and nickel slag and preparation of arsenic-bearing compounds.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,24(6),1918-1927. |
| MLA | Yu, Guo-lin,et al."Extraction of arsenic from arsenic-containing cobalt and nickel slag and preparation of arsenic-bearing compounds".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 24.6(2014):1918-1927. |
入库方式： OAI收割
来源：过程工程研究所
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