Method for producing pre-melted calcium aluminate by using secondary aluminum ash

• Main Authors: GUO YIZHI, LI GUOEN
• Format: Patent
• Language: Chinese; English
• Published: 21.06.2024
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a method for producing pre-melted calcium aluminate by using secondary aluminum ash, which comprises the following steps: mixing the secondary aluminum ash and limestone, heating at high temperature to obtain the pre-melted calcium aluminate by using the characteristics that aluminum is easy to react with oxygen at normal temperature to obtain aluminum oxide and limestone is easy to decompose into quick lime and carbon dioxide at high temperature; according to the invention, the characteristics of reducibility and high alumina content of the secondary aluminum ash are fully utilized, the high-value utilization of the secondary aluminum ash is realized, the aluminum oxide in the secondary aluminum ash and the quick lime are subjected to a high-temperature reaction to obtain calcium aluminate, and the aluminum slag screened from the raw materials can also be smelted into aluminum ingots so as to be secondarily utilized. The method has the advantages of no pollution, short process, low cos