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Method for preparing magnesium aluminate spinel from aluminum electrolysis ash
The invention provides a method for preparing magnesium aluminate spinel from aluminum electrolysis ash, which comprises the following steps: mixing the aluminum electrolysis ash with a mineralizing agent, and roasting to obtain a mineralized material; mixing the mineralized material with an acid solution, and carrying out acidolysis and detoxification to obtain acidolysis residues and an acidolysis solution; mixing the acidolysis residues with alkali liquor for desiliconization to obtain desiliconized residues and desiliconized liquid; and mixing the desiliconized slag with magnesium oxide, and sintering to obtain the magnesium aluminate spinel. According to the method, the problems of directional separation and deep removal of impurities in the aluminum electrolysis ash are solved through the synergistic effect of mineralization roasting, acidolysis detoxification and alkali liquor regulation and control, valuable components in the aluminum electrolysis ash can be recycled in a gradient mode, the calcium fluoride and chlorate composite fluxing agent is co-produced, and the resource utilization rate of the aluminum electrolysis ash is increased; the high-quality magnesium aluminate spinel material is finally prepared from the aluminum electrolysis ash, and the magnesium aluminate spinel material is low in impurity content and high in volume density.
本发明提供了一种利用铝电解灰制备镁铝尖晶石的方法，所述方法包括：将铝电解灰与矿化剂混合进行焙烧，得到矿化料；将矿化料与酸液混合进行酸解脱毒，得到酸解渣和酸解液；将酸解渣与碱液混合进行脱硅，得到脱硅渣与脱硅液；将脱硅渣与氧化镁混合进行烧结，得到镁铝尖晶石。本发明提供的方法通过矿化焙烧‑酸解脱毒‑碱液调控的协同作用解决了铝电解灰中杂质定向分离与深度脱除的难题，可以将铝电解灰中的有价组元实现梯级回收，联产氟化钙和氯化盐复合助熔剂，提高铝电解灰的资源化利用率；将铝电解灰最终制备高质量镁铝尖晶石材料，其杂质含量低、体积密度高。
Method for preparing magnesium aluminate spinel from aluminum electrolysis ash
The invention provides a method for preparing magnesium aluminate spinel from aluminum electrolysis ash, which comprises the following steps: mixing the aluminum electrolysis ash with a mineralizing agent, and roasting to obtain a mineralized material; mixing the mineralized material with an acid solution, and carrying out acidolysis and detoxification to obtain acidolysis residues and an acidolysis solution; mixing the acidolysis residues with alkali liquor for desiliconization to obtain desiliconized residues and desiliconized liquid; and mixing the desiliconized slag with magnesium oxide, and sintering to obtain the magnesium aluminate spinel. According to the method, the problems of directional separation and deep removal of impurities in the aluminum electrolysis ash are solved through the synergistic effect of mineralization roasting, acidolysis detoxification and alkali liquor regulation and control, valuable components in the aluminum electrolysis ash can be recycled in a gradient mode, the calcium fluoride and chlorate composite fluxing agent is co-produced, and the resource utilization rate of the aluminum electrolysis ash is increased; the high-quality magnesium aluminate spinel material is finally prepared from the aluminum electrolysis ash, and the magnesium aluminate spinel material is low in impurity content and high in volume density.
本发明提供了一种利用铝电解灰制备镁铝尖晶石的方法，所述方法包括：将铝电解灰与矿化剂混合进行焙烧，得到矿化料；将矿化料与酸液混合进行酸解脱毒，得到酸解渣和酸解液；将酸解渣与碱液混合进行脱硅，得到脱硅渣与脱硅液；将脱硅渣与氧化镁混合进行烧结，得到镁铝尖晶石。本发明提供的方法通过矿化焙烧‑酸解脱毒‑碱液调控的协同作用解决了铝电解灰中杂质定向分离与深度脱除的难题，可以将铝电解灰中的有价组元实现梯级回收，联产氟化钙和氯化盐复合助熔剂，提高铝电解灰的资源化利用率；将铝电解灰最终制备高质量镁铝尖晶石材料，其杂质含量低、体积密度高。
Method for preparing magnesium aluminate spinel from aluminum electrolysis ash
一种利用铝电解灰制备镁铝尖晶石的方法
ZUO ZHENGPING (author) / LI SHAOPENG (author) / LI HUIQUAN (author) / ZHANG JIANBO (author) / WU WENFEN (author) / LI ZHANBING (author)
2024-03-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
C01D
Verbindungen der Alkalimetalle, d.h. des Lithiums, Natriums, Kaliums, Rubidiums, Cäsiums oder Franciums
,
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
/
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
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