| Alkaline pretreatment for chlorine removal from high-chlorine rhodochrosite |
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| 作者姓名： | Xing-ran Zhang Zuo-hua Liu Wen-sheng Li Ya-ya Cheng Jun Du Chang-yuan Tao |
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| 作者单位： | Chongqing Key Laboratory of Chemical Process for Clean-Energy and Resource Utilization, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China |
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| 基金项目： | This project was financially supported by the National Science and Technology Support Program of China |
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| 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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| 关 键 词： | manganese ore treatment rhodochrosite sodium carbonation pretreatment dechlorination |
Alkaline pretreatment for chlorine removal from high-chlorine rhodochrosite |
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| Xing-ran Zhang,Zuo-hua Liu,Wen-sheng Li,Ya-ya Cheng,Jun Du,Chang-yuan Tao.Alkaline pretreatment for chlorine removal from high-chlorine rhodochrosite[J].International Journal of Minerals,Metallurgy and Materials,2016,23(11):1252-1257. |
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| Authors: | Xing-ran Zhang Zuo-hua Liu Wen-sheng Li Ya-ya Cheng Jun Du Chang-yuan Tao |
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| Institution: | Chongqing Key Laboratory of Chemical Process for Clean-Energy and Resource Utilization, Colege of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China |
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| Abstract: | 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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| Keywords: | manganese ore treatment rhodochrosite sodium carbonation pretreatment dechlorination |
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