Gypsum powder is one of the five major gel materials, occupies an important position in the national economy, widely used in construction, building materials, industrial molds and art models, chemical industry and agriculture, food processing and medicine beauty and many other applications, is an important industrial raw materials. The difference between desulfurization gypsum powder and general gypsum powder lies in the difference in physical composition, desulfurization gypsum powder also contains silica, sodium oxide, calcium carbonate, calcium sulfite, limestone, calcium chloride, magnesium chloride, etc. Compared with other gypsum powders, desulfurized gypsum powder has the characteristics of renewable, small particle size, stable composition, low content of harmful impurities and high purity.
Industrial developed countries have better solved technical problems such as transportation, drying, modification and application of desulfurized gypsum, and gypsum industry is using desulfurization gypsum on a large scale, and the application technology is relatively mature. Japan is the first country in the world to apply desulfurization equipment on a large scale, emitting nearly 2 million tons of desulfurization gypsum every year. FGD is of high quality, the best utilization, with an average of more than 97.5%, and the utilization volume reached 2.145 million tons in 1977, almost all of which was used for the production of gypsum board, and in recent years, fly ash and FGD and a small amount of lime were added to make a wet powdery material with volcanic ash reaction strength "Pozote" as a sand substitute. German FGD technology is the most advanced and the largest quantity, and all utilized, mainly in the production area to build a factory to produce gypsum board, in addition to the replacement of aging soil and calcite production paper filler and coating material. The United States has developed rapidly since the 70s, and its output in 2000 has reached 9 million tons. At present, it is mainly used in the production of gypsum board together with natural gypsum.