Alkaline pretreatment for chlorine removal from high-chlorine rhodochrosite

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 carbon...

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Bibliographic Details
Published in:矿物冶金与材料学报：英文版 2016, Vol.23 (11), p.1252-1257
Main Author: Xing-ran Zhang Zuo-hua Liu Wen-sheng Li Ya-ya Cheng Jun Du Chang-yuan Tao
Format: Article
Language:English
Subjects:
反应时间
影响因素
最佳条件
碱预处理
碳酸钠浓度
脱氯
菱锰矿
高氯
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Summary: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 Mn~（2＋）. 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%.
ISSN:1674-4799
1869-103X