Alkaline pretreatment for chlorine removal from high-chlorine rhodochrosite
来源期刊：International Journal of Minerals Metallurgy and Materials2016年第11期
论文作者：Xing-ran Zhang Zuo-hua Liu Wen-sheng Li Ya-ya Cheng Jun Du Chang-yuan Tao
文章页码：1252 - 1257
摘 要：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%.
Xing-ran Zhang，Zuo-hua Liu，Wen-sheng Li，Ya-ya Cheng，Jun Du，Chang-yuan Tao
Chongqing Key Laboratory of Chemical Process for Clean-Energy and Resource Utilization,College of Chemistry and Chemical Engineering,Chongqing University
摘 要：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%.
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