| 铁热还原法处理钙砷渣及金属砷的制备工艺 |
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| 引用本文： | 刘子翔,梁佳昀,孙京博,龚傲,田磊.铁热还原法处理钙砷渣及金属砷的制备工艺[J].有色金属科学与工程,2022,13(2):22-30. |
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| 作者姓名： | 刘子翔 梁佳昀 孙京博 龚傲 田磊 |
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| 作者单位： | 江西理工大学绿色冶金与过程强化研究所，江西 赣州 341000 |
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| 基金项目： | 中国博士后科学基金资助项目;江西省主要学科学术与技术带头人—青年人才培养计划;江西理工大学清江青年英才支持计划;江西省博士后科研项目;国家自然科学基金;国家重点研发计划;江西省杰出青年科学基金 |
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| 摘 要： | 在资源与环境的双重压力下，如何解决有色冶金行业产生的冶炼钙砷渣无害化和资源化问题，成为彻底消除“砷害”的关键所在，对于整个冶金工业具有非常重要的意义。采用铁热还原短流程直接还原钙砷渣，砷以砷单质的形式得以回收。结果表明，在还原温度为1 050 ℃，还原时间为30 min，铁配入系数为1.5的工艺条件下，可以得到比较理想的脱砷效果，砷还原率可达到96.56%。所得产物和还原后渣经XRD仪、扫描电镜和能谱仪分析，生成物为单质砷，纯度达到99%，反应后渣中主要成分为Ca2Fe2O5和CaO。
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| 关 键 词： | 钙砷渣 砷 铁热还原 热力学分析 |
| 收稿时间： | 2021-08-17 |
Preparation of metal arsenic from calcium arsenic slag by ferrothermal reduction |
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| Affiliation: | Institute of Green Metallurgy and Process Intensification, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China |
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| Abstract: | Under the dual pressure of resources and the environment, how to deal with the issues of harmlessness and utilization of metallurgical calcium arsenic slag produced by the nonferrous metallurgical industry has become the key to eliminating "arsenic damage" thoroughly, which has great significance to the whole metallurgical industry. In this paper, calcium arsenic slag was directly reduced by a short process of iron reduction, and arsenic was recovered in the form of arsenic. The results showed that under the conditions of a reduction temperature of 1050 ℃, holding time of 30 min, and iron blending coefficient of 1.5, the ideal arsenic removal effect could be obtained, and the reduction rate of arsenic could reach 96.56%. The product and reduced slag were analyzed by XRD and SEM-EDS. The reduction products were elemental arsenic with a purity of approximately 99%, and the main components of the slag were Ca2Fe2O5 and CaO. |
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