Introduce the production process and characteristics of gypsum powder
Gypsum powder structure and morphology: monoclinic system, a0 = 0.568nm, b0 = 1.518nm, c0 = 0.629nm, β = 118.23 '; Z = 4. The crystal structure consists of [SO4] 2-tetrahedron and Ca2 + connected to form a double layer of ∥ (010), and the double layers are connected by H2O molecules. Its complete cleavage occurs in this direction. The coordination number of Ca2 + is 8, and it is linked to 6 O2- and 2 H2O molecules in the adjacent 4 [SO4] tetrahedra. H2O molecules are linked to O2- in [SO4] by hydrogen bonds, and water molecules are linked by molecular bonds.
The production process of gypsum powder can be summarized as the three major processes of gypsum stone crushing system, calcining system and grinding and aging system. The crushing equipment can use jaw crusher, roller crusher, impact crusher, impact crusher, ring roller crusher, hammer crusher, etc .; calcining equipment can choose continuous or intermittent rotation according to the application of building gypsum kiln. Continuous or intermittent vertical wok, heat-conducting oil boiling furnace and disc dryer, etc .; the calcination process can be divided into two main production processes: first burn and then grind and first burn and then burn. The grinding equipment can be selected from Raymond mill, vertical mill, cone mill and Peter mill.
Compared with ordinary cement mortar, the characteristics of whitewashed gypsum powder are: 1. Strong adhesive force, not easy to fall off, which overcomes the phenomenon of hollowing and cracking often seen in traditional cement mortar; 2. It has a breathing function and can adjust the indoor air humidity; 3. Non-toxic and tasteless, its ingredients pay attention to health and environmental protection; Fourth, fast condensation, light weight, and reduce the weight of the floor; Fifth, the construction process is simple, less ground ash, and the operation is fast; six, a new type of green ecological building materials, good fire performance .
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