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Method for extracting ammonium and modifying electrolytic manganese residue
The invention relates to a method for extracting ammonium and modifying electrolytic manganese residue, and belongs to the field of environmental protection. The method comprises the steps: mixing the electrolytic manganese residue with one or more of quick lime, slake lime, carbide slag, steel slag, red mud or other alkaline slag, and heating and calcining the mixture under the condition of 200 to 500 DEG C. By adopting the method, the disadvantage that pollutants are formed in the heating process of the electrolytic manganese residue containing two volatile gases such as nitrogen and sulfur can be ingeniously avoided, the cementitious activity of the heated modified electrolytic manganese residue can be remarkably improved, and the modified electrolytic manganese residue can be used in cement factories, brick factories, concrete mixing plants and the like; more favorable advantages are as follows: the nitrogen element in the electrolytic manganese residue forms ammonia gas which is prepared into ammonia water to be recycled, and the sulfur element is cured in the residue in a form of calcium sulfate to be used as a beneficial cement excitant or retarder component. By adopting the process, the economical performance and environmental friendliness of an electrolytic manganese residue pretreatment method can be improved, an important significance for the recycling of the electrolytic manganese residue in China can be realized, the application prospect is wide, and the market value is vast.
Method for extracting ammonium and modifying electrolytic manganese residue
The invention relates to a method for extracting ammonium and modifying electrolytic manganese residue, and belongs to the field of environmental protection. The method comprises the steps: mixing the electrolytic manganese residue with one or more of quick lime, slake lime, carbide slag, steel slag, red mud or other alkaline slag, and heating and calcining the mixture under the condition of 200 to 500 DEG C. By adopting the method, the disadvantage that pollutants are formed in the heating process of the electrolytic manganese residue containing two volatile gases such as nitrogen and sulfur can be ingeniously avoided, the cementitious activity of the heated modified electrolytic manganese residue can be remarkably improved, and the modified electrolytic manganese residue can be used in cement factories, brick factories, concrete mixing plants and the like; more favorable advantages are as follows: the nitrogen element in the electrolytic manganese residue forms ammonia gas which is prepared into ammonia water to be recycled, and the sulfur element is cured in the residue in a form of calcium sulfate to be used as a beneficial cement excitant or retarder component. By adopting the process, the economical performance and environmental friendliness of an electrolytic manganese residue pretreatment method can be improved, an important significance for the recycling of the electrolytic manganese residue in China can be realized, the application prospect is wide, and the market value is vast.
Method for extracting ammonium and modifying electrolytic manganese residue
LI YU (author) / LIU XIAOMING (author) / ZHANG LINGLING (author) / CANG DAQIANG (author)
2015-04-22
Patent
Electronic Resource
English
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