Polyaluminium chloride is not only purified water active and can actively cooperate with fire-retardant polyaluminum chloride is a water-fire invasion of energy-saving people. Industrial wastewater has seriously affected the quality of drinking water in Qi country. Large factories and sewage treatment plants generally use flocculants such as polyaluminium chloride and polyferric sulfate to purify sewage. Polyaluminium chloride into waste water, glorious decomposition, to provide people with clean water. Not only purified water active but also actively cooperate with fire prevention. Polyaluminum chloride as a refractory binder, is the use of aluminum-containing raw materials or aluminum through the hydrochloric acid dissolution, hydrolysis, polymerization and other physical and chemical treatment made of an aluminum hydroxide sol. The use of PAC as a binder for bulk refractories does not reduce the refractoriness. AL2O3, which is formed by the dehydration and decomposition of polyaluminum chloride during heating, is a highly dispersed activated alumina that helps to sinter It is suitable as a refractory binder.