What Is Aluminium Smelting?

To produce metallic aluminum (electrolytic aluminum), the first step is to produce alumina. Aluminium oxide in the world is almost all produced by the alkali method. The Bayer method, the sintering method, and the Bayer-sintering combined method are mainly used in the Bayer method. Two tons of alumina are needed to produce one ton of metal aluminum. According to data, China's electrolytic aluminum production in 2002 required 8.52 million tons of alumina, domestic supply 5.48 million tons, and imports 3.04 million tons. In 2003, 11 million tons of alumina were required, domestic supply was 6.15 million tons, and imports were 4.85 million tons. Solving the domestic alumina gap is a big problem.