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投稿时间:2020-12-08 修订日期:2020-12-08
投稿时间:2020-12-08 修订日期:2020-12-08
中文摘要: 焙烧氰化法提金尾渣经酸浸后产出大量酸性硫酸铁溶液,因其中含有较高的砷而限制了其高值化利用。采用铁粉预还原—硫化亚铁脱砷对溶液中的砷进行脱除研究。结果表明,溶液中砷的存在形式及分布与溶液体系电位密切相关,铁粉可以有效降低溶液电位,经铁粉预还原后硫酸铁溶液中的砷可用硫化亚铁有效脱除。当铁粉添加量为溶液中铁含量的0.6倍,溶液加入36.6 g/L的FeS,搅拌30 min,可使溶液中砷含量由0.253 g/L降低至4.79 mg/L。空气对脱砷过程有不利的影响。
Abstract:A large amount of acid ferric sulfate solution is produced after acid leaching of gold tailings from roasting cyanidation process. Its high value utilization is limited because of its high arsenic content. Method to remove arsenic by iron powder pre-reduction and ferrous sulfide dearsenization was investigated. The results show that existing form and distribution of arsenic in solution are closely related to potential of solution system, and iron powder can effectively reduce potential of solution. Arsenic in ferric sulfate solution after pre-reduction with iron powder can be effectively removed by ferrous sulfide. When amount of iron powder is 0.6 times of iron content in solution, arsenic content in solution can be reduced from 0.253 g/L to 4.79 mg/L after adding 36.6 g/L FeS into solution and stirring for 30 min. Air has an adverse effect on arsenic removal process.
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基金项目:国家自然科学基金资助项目(51974221);陕西省教育厅重点实验室科学研究计划项目(17JS067)
作者 | 单位 | |
马红周 | 西安建筑科技大学冶金工程学院 | mahongzhou123@126.com |
王丁丁 | 西安建筑科技大学冶金工程学院 | |
王耀宁* | 西安建筑科技大学冶金工程学院 陕西省黄金与资源重点实验室 | yaoningwang@126.com |
党晓娥 | 西安建筑科技大学冶金工程学院 | |
王碧侠 | 西安建筑科技大学冶金工程学院 |
引用文本:
马红周,王丁丁,王耀宁,党晓娥,王碧侠.铁粉预还原—硫化亚铁脱除高酸性硫酸铁溶液中的砷[J].有色金属(冶炼部分),2021(5):6-10.
Ma Hong-zhou,WANG Ding-ding,WANG Yao-ning,DANG Xiao-e,WANG Bi-xia.Removal of Arsenic from High Acid Ferric Sulfate Solution by Iron Powder Pre-reduction and Ferrous Sulfide Dearsenization[J].Nonferrous Metals (Extractive Metallurgy),2021(5):6-10.
马红周,王丁丁,王耀宁,党晓娥,王碧侠.铁粉预还原—硫化亚铁脱除高酸性硫酸铁溶液中的砷[J].有色金属(冶炼部分),2021(5):6-10.
Ma Hong-zhou,WANG Ding-ding,WANG Yao-ning,DANG Xiao-e,WANG Bi-xia.Removal of Arsenic from High Acid Ferric Sulfate Solution by Iron Powder Pre-reduction and Ferrous Sulfide Dearsenization[J].Nonferrous Metals (Extractive Metallurgy),2021(5):6-10.