Alkaline pretreatment for chlorine removal from high-chlorine rhodochrosite
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- 作者：Xing-ran Zhang ; Zuo-hua Liu ; Wen-sheng Li…
- 关键词：manganese ore treatment ; rhodochrosite ; sodium carbonation ; pretreatment ; dechlorination
- 刊名：International Journal of Minerals, Metallurgy, and Materials
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：23
- 期：11
- 页码：1252-1257
- 全文大小：1,082 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Materials Science
Metallic Materials
Mineral Resources - 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
- ISSN：1869-103X
- 卷排序：23
文摘
Chloride in manganese ore adversely affects mineral extraction. The mechanisms and the factors that influence an alkali pretreatment to removal chlorine from manganese ore were explored to eliminate hazards posed by chlorine during the electrolysis of manganese. The results showed that sodium carbonate, when used as an alkaline additive, promoted the dissolution of insoluble chloride, enhanced the migration of chloride ions, and effectively stabilized Mn2+. The optimal conditions were a sodium carbonate concentration of 0.45 mol·L−1, a liquid-solid ratio of 5:1 mL·g−1, a reaction time of 1 h, and a temperature of 25°C. The chlorine removal efficiency was greater than 95%, and the ore grade (Mn) was increased by 2.7%.