Solid waste phosphogypsum powder is a kind of waste produced by phosphorus chemical industry, its composition is more complex, mainly contains calcium sulfate, calcium fluoride and other substances. Since the composition of phosphogypsum powder is similar to that of natural gypsum, it can be considered to make building bricks. The following will describe in detail how to use solid waste phosphogypsum powder to make bricks.

   Pretreatment of phosphogypsum powder The first step in making bricks with phosphogypsum powder is pretreatment. This step mainly includes drying, crushing and grinding. First, the phosphogypsum powder is dried to remove the water in it for subsequent processing. Then, the dried phosphogypsum powder is broken by a crusher to break it into fine particles. Finally, the pulverized phosphogypsum powder is pulverized by a pulverizer to make it reach the fineness required for brick making. 2. Ingredients and mixing The phosphogypsum powder after pretreatment needs to be mixed and mixed. According to the requirements of brick making, adding appropriate additives, such as clay, cement, etc., to improve the formability and strength of phosphogypsum powder. Then, the ingredients are mixed so that the various raw materials are fully mixed. Third, after forming and mixing evenly, phosphogypsum powder needs to be formed. At present, the commonly used molding equipment is Liu's machinery large tonnage phosphogypsum brick making machine equipment - static press brick machine. This device can be used to press the mixture of phosphogypsum powder into the required bricks or blocks. During the molding process, attention needs to be paid to controlling pressure and time to ensure the compactness and strength of the bricks. Fourth, the phosphogypsum brick after forming does not need to be maintained and can be directly palletized and packed. The water in the bricks evaporates and promotes the chemical reaction, which increases the strength and stability of the bricks. Pay attention to the control of temperature and humidity to ensure the quality of the bricks. Fifth, finished product processing and testing phosphogypsum bricks need to be processed and tested. The finished phosphogypsum large block surface does not need to be polished, cut and other treatment, and its appearance quality and dimensional accuracy are designed by mold. Testing mainly includes testing the appearance, size, strength, etc. of the finished brick to ensure that it meets the relevant standards and user requirements. Application and market After the above steps, phosphogypsum bricks can be used in the construction field. Phosphogypsum bricks are welcomed by the market because of their good fire-proof, water-proof and sound-proof properties. At the same time, the use of solid waste phosphogypsum powder to make bricks can also effectively reduce the discharge of solid waste, which has positive significance for environmental protection. In short, the use of solid waste phosphogypsum powder to make bricks is a feasible technology, which can not only reduce the emission of solid waste, but also provide a new type of building material for the construction industry. In the future, with the continuous progress of technology and the increase of market demand, the application prospect of phosphogypsum brick will be broader. More about the treatment and utilization of solid waste phosphogypsum powder, phosphogypsum block technical solutions welcome to consult Quanzhou Liushi Machinery Co., LTD., has rich experience and phosphogypsum production line site can be visited

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