Aluminum Ingot Production Process
hmwadeseo > 12-29-2021, 08:28 AM
What are the production processes of aluminum ingots? We first produce bauxite, produce aluminum ore fines through processes such as washing and grinding, and then obtain alumina by four complicated processes such as roasting, and the main bauxite producing alumina There are three types: gibbsite, diaspore, and boehmite. Among the proven global reserves of bauxite, 92% are weathered laterite bauxite, which is a gibbsite type. These bauxites are characterized by low silicon, high iron, high aluminum to silicon ratio, concentrated in Africa. West, Oceania and Central and South America. The remaining 8% are sedimentary bauxites, belonging to boehmite and diaspore, medium to low grade, mainly distributed in Greece, the former Yugoslavia and Hungary.
The production of aluminum ingots is composed of bauxite mining, alumina production, and aluminum electrolysis.
Due to the different characteristics of the three bauxite mines, each alumina production enterprise adopts different production processes in production, mainly including Bayer method, soda lime sintering method and Bayer-sintering combined method. Generally, high-grade bauxite is produced by the Bayer process, and low-grade bauxite is produced by a combined method or a sintering method. Due to its simple process and low energy consumption, it has become the main method used in the current production of aluminum ingots. The output accounts for about 95% of the total global alumina production. Alumina is electrolyzed by aluminum under the action of a strong current. This process is called electrolytic aluminum;