The main component of gypsum is calcium sulfate dihydrate (CaSO4. 2H2O). After calcining and grinding, various gypsum variants can be obtained. β-type hemihydrate gypsum is one of them, which is usually referred to as building gypsum powder (βCaSO4. 1 / 2H2O), is the main raw material for the manufacture of gypsum products such as paper gypsum board, fiber gypsum board, and gypsum. As a manufacturer of gypsum powder grinding equipment for construction, Guilin Hongcheng will introduce to you today the application of gypsum powder grinding equipment for construction in the production process of hemihydrate gypsum.
With the increase of market demand, gypsum powder factories have been built in many places. At present, the production process of hemihydrate gypsum is mainly dry firing to produce β-type hemihydrate gypsum, which is divided into three forms. As a manufacturer of gypsum powder grinding equipment for construction, Guilin Hongcheng will introduce three production processes of hemihydrate gypsum and their advantages and disadvantages.
① Mineral dressing → crushing (jaw crushing) → calcining → grinding of gypsum powder for construction → aging and packaging
The main equipment includes Raymond mill, wind-swept mill, rotary kiln, dryer, and some use frying pan (both intermittent and continuous). This process has many equipments and large system capacity. Since the feed particles of the drying and calcination equipment are large and uneven in size, a certain particle gradation cannot be formed according to the composition ratio of the phase contained in the stone powder, so that the calcination is uneven, resulting in unstable product quality.
② Mineral dressing → crushing (jaw crushing) → grinding of gypsum powder for construction → calcining → aging → packaging
Compared with the above process, this technological process uses the same grinding equipment, and the calcining equipment is mainly a frying pan. At present, many manufacturers adopt this process. Although this process can make the raw gypsum powder evenly heated and gradually dehydrated, it is convenient to adjust the chemical composition and physical properties of the product, the operation is simple, the floor space is small, and the equipment investment is low, but the whole production process is difficult to be automated, and the energy consumption is high. Manual completion is labor-intensive, and product quality is greatly affected by human factors.
③ Mineral dressing → crushing (jaw crushing) → grinding and dehydration of gypsum powder grinding equipment for construction → aging → packaging
In this process, the grinding and dehydration of gypsum is carried out in the same equipment, and the dehydration speed is very fast, which can be completed within a few seconds. The technological process is simple, the land occupation is small, the investment is low, the production energy consumption is low, the degree of automation is high, and the product quality is stable. Industrial developed countries such as Germany and the United States mostly use this process. Such as Germany's Peter Mill (Petter Mill), France's high-temperature wind-swept mill, etc. Although such imported equipment is good, it is expensive and ordinary manufacturers cannot afford it. Therefore, on the basis of digesting and absorbing foreign advanced technology, our factory has designed and manufactured HLM gypsum vertical mill suitable for this production process, and it has been successfully put into operation.
Guilin Hongcheng is a manufacturer of gypsum powder grinding equipment for construction. Our gypsum powder Raymond mill, gypsum vertical mill and other equipment are widely used in the production process of hemihydrate gypsum. Among them, HLM gypsum vertical mill grinding and dehydration integrated equipment is used to equip the building gypsum production line. The process layout is simple and smooth, the degree of mechanization and automation is high, the production energy consumption is low, the investment is low, the construction speed is fast, and the product quality is easy to control. With the popularization and application of this process in the gypsum product industry, great economic and social benefits will be produced. If you have purchase needs of gypsum powder grinding equipment for construction, please leave us a message for details of the equipment.