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Alumina is a widely used industrial reagent, usually with alum confusion. Alum is vitriolic bisulfate with of potassium sulfate, and is the single salt alumina. By ChongYan bisulfate say again, two or more single of salt, in solution, for single salt ions ionization. Alumina is often as flocculant for purification of water and sewage treatment equipment, also used in papermaking industry. Natural conditions, vitriolic with salt and water almost not exist without. It will form a series of hydrate, including *6 water vitriolic is the most common. Alumina is also a very effective molluscs pesticides, can kill Spain Spanish slugs worm (nose). In textiles for water purification and alumina printing as medium. In the purification of water, it makes impurities more easily precipitation and freezes, the filter. When dissolved in numerous neutrophils alkaline water or micro, produce colloid precipitation aluminum hydroxide, Al (OH) 3. In printing and dyeing cloth, aluminum hydroxide colloid make dye more easily attached to plant fiber above all. Alumina is also used to regulate soil pH value, because it also generate aluminum hydroxide hydrolysis produce a small number of sulfuric acid dilute solution.