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:International journal of minerals, metallurgy and materials metallurgy and materials, 2016-11, Vol.23 (11), p.1252-1257
Main Authors: Zhang, Xing-ran, Liu, Zuo-hua, Li, Wen-sheng, Cheng, Ya-ya, Du, Jun, Tao, Chang-yuan
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chloride ions
Chlorine
Composites
Corrosion and Coatings
Electrolysis
Glass
Hazard mitigation
Manganese
Manganese ions
Manganese ores
Materials Science
Metallic Materials
Natural Materials
Pretreatment
Sodium
Sodium carbonate
Surfaces and Interfaces
Thin Films
Tribology
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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 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%.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-016-1346-5