Recovery of soluble manganese from electrolyte manganese residue using a combination of ammonia and CO2
To minimize the environmental impacts of electrolyte manganese residue (EMR) and to recover the valuable manganese element, precipitation of the soluble manganese from EMR using ammonia bubbled with CO2 was investigated. Precipitation behaviours in the presence of ammonia with or without CO2 are dis...
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| Veröffentlicht in: | Hydrometallurgy 2016-09, Vol.164, p.288-294 |
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| creator | Wang, Nanfang Fang, Zhengjun Peng, Sui Cheng, Dexing Du, Bing Zhou, Changbo |
| description | To minimize the environmental impacts of electrolyte manganese residue (EMR) and to recover the valuable manganese element, precipitation of the soluble manganese from EMR using ammonia bubbled with CO2 was investigated. Precipitation behaviours in the presence of ammonia with or without CO2 are discussed by comparison. It was found that the process using a combination of ammonia and CO2 results in better precipitation of manganese, yielding MnCO3 as observed by XRD analysis. The molar ratio of ammonia to manganese and the strength of bubbling and agitation with CO2 were studied as parameters affecting the recovery of manganese. The optimal experimental conditions for the recovery of manganese were found to be an ammonia-to-manganese molar ratio of 3:1, CO2 bubbling at a rate of 2L/min for 2min, and agitation at 190rpm at 298K for 12min. Under these conditions, a manganese recovery of 94.2% was obtained. Kinetic analysis indicated that the order of the reaction and the energy of activation for the precipitation of manganese are approximately 2.2 and −56.7kJ/mol, respectively. |
| doi_str_mv | 10.1016/j.hydromet.2016.06.019 |
| format | Article |
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Precipitation behaviours in the presence of ammonia with or without CO2 are discussed by comparison. It was found that the process using a combination of ammonia and CO2 results in better precipitation of manganese, yielding MnCO3 as observed by XRD analysis. The molar ratio of ammonia to manganese and the strength of bubbling and agitation with CO2 were studied as parameters affecting the recovery of manganese. The optimal experimental conditions for the recovery of manganese were found to be an ammonia-to-manganese molar ratio of 3:1, CO2 bubbling at a rate of 2L/min for 2min, and agitation at 190rpm at 298K for 12min. Under these conditions, a manganese recovery of 94.2% was obtained. 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Precipitation behaviours in the presence of ammonia with or without CO2 are discussed by comparison. It was found that the process using a combination of ammonia and CO2 results in better precipitation of manganese, yielding MnCO3 as observed by XRD analysis. The molar ratio of ammonia to manganese and the strength of bubbling and agitation with CO2 were studied as parameters affecting the recovery of manganese. The optimal experimental conditions for the recovery of manganese were found to be an ammonia-to-manganese molar ratio of 3:1, CO2 bubbling at a rate of 2L/min for 2min, and agitation at 190rpm at 298K for 12min. Under these conditions, a manganese recovery of 94.2% was obtained. 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Precipitation behaviours in the presence of ammonia with or without CO2 are discussed by comparison. It was found that the process using a combination of ammonia and CO2 results in better precipitation of manganese, yielding MnCO3 as observed by XRD analysis. The molar ratio of ammonia to manganese and the strength of bubbling and agitation with CO2 were studied as parameters affecting the recovery of manganese. The optimal experimental conditions for the recovery of manganese were found to be an ammonia-to-manganese molar ratio of 3:1, CO2 bubbling at a rate of 2L/min for 2min, and agitation at 190rpm at 298K for 12min. Under these conditions, a manganese recovery of 94.2% was obtained. Kinetic analysis indicated that the order of the reaction and the energy of activation for the precipitation of manganese are approximately 2.2 and −56.7kJ/mol, respectively.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.hydromet.2016.06.019</doi><tpages>7</tpages></addata></record> |
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| ispartof | Hydrometallurgy, 2016-09, Vol.164, p.288-294 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Agitation Ammonia Ammonia with CO2 Bubbling Carbon dioxide Electrolysis manganese residue Electrolytes Manganese Manganese recovery Precipitation Recovery Residues |
| title | Recovery of soluble manganese from electrolyte manganese residue using a combination of ammonia and CO2 |
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