Method for preparing aluminum fluoride from aluminum electrolysis fluorine-containing waste
The invention provides a method for preparing aluminum fluoride from aluminum electrolysis fluorine-containing waste, which comprises the following steps of: mixing overhaul slag and carbon slag for size mixing, and carrying out pressurized alkaline leaching, cyanogen removal and solid-liquid separa...
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| creator | YANG JINXING GU LIJUAN JIANG JUN LUO WUSHENG YANG DONG MENG HAIPING WU JIAHAO ZHOU ZHICHANG LI JUNPING QIU ZHESHENG YANG HANXUAN CHANG SICHENG PU TINGTING LI XUEYOU FU YU LI DENENG ZHAO DAXIU |
| description | The invention provides a method for preparing aluminum fluoride from aluminum electrolysis fluorine-containing waste, which comprises the following steps of: mixing overhaul slag and carbon slag for size mixing, and carrying out pressurized alkaline leaching, cyanogen removal and solid-liquid separation to obtain alkaline leaching liquid and alkaline leaching slag; carrying out acid leaching on the alkaline leaching residues, and carrying out solid-liquid separation to obtain acid leaching liquid and acid leaching residues; mixing the alkaline leaching solution and the acid leaching solution, neutralizing and precipitating, and separating to obtain regenerated cryolite; mixing the regenerated cryolite and an aluminum electrolyte, and treating to obtain mixed powder; reacting the mixed powder with concentrated sulfuric acid to obtain reaction residues and hydrogen fluoride; adding sodium hydroxide into filtrate obtained after the reaction residues are treated, and performing solid-liquid separation to obtain a |
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carrying out acid leaching on the alkaline leaching residues, and carrying out solid-liquid separation to obtain acid leaching liquid and acid leaching residues; mixing the alkaline leaching solution and the acid leaching solution, neutralizing and precipitating, and separating to obtain regenerated cryolite; mixing the regenerated cryolite and an aluminum electrolyte, and treating to obtain mixed powder; reacting the mixed powder with concentrated sulfuric acid to obtain reaction residues and hydrogen fluoride; adding sodium hydroxide into filtrate obtained after the reaction residues are treated, and performing solid-liquid separation to obtain a</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS INORGANIC CHEMISTRY METALLURGY |
| title | Method for preparing aluminum fluoride from aluminum electrolysis fluorine-containing waste |
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