In general, the term CGA refers to chemical products in the form of aluminium hydroxide and alumina used for various industrial applications except for aluminium industry. Aluminium hydroxide is a semi-finished product that can be used for water purification. While alumina can be used to produce electronic support components. Some products that use CGA include refractoriness, abrasive, assembled products, integrated circuit (IC), as well as basic materials for LCD screens. Alumina processing in Tayan will produce chemical grade alumina products by processing bauxite ore through the Bayer process into alumina products with a nameplate capacity of 300,000 metric tons of Al2O3 (alumina) base per year. The Bayer process consists of three stages, namely Liquor Clarification process, Precipitation Process and Calcination Process.