Aluminum hydroxide is the largest and most widely used inorganic flame retardant additive. Aluminum hydroxide as a flame retardant can not only flame retardant, but also prevent smoke, not produce drops, and do not produce toxic gases. Therefore, it has been widely used, and the amount of use is increasing year by year. Scope of application: thermosetting plastics, thermoplastics, synthetic rubber, coatings and building materials. At the same time, aluminum hydroxide is also the basic raw material for aluminum fluoride in the electrolytic aluminum industry, and aluminum hydroxide is widely used in the industry.