Natural dihydrate gypsum (CaSO4·2H2O) is also known as raw gypsum. After calcination and grinding, β -type hemihydrate gypsum (CaSO4·1/2H2O) can be obtained, which is building gypsum and is also called calcined gypsum or plaster. If the calcination temperature is 190°C, model gypsum can be obtained, and its fineness and whiteness are both higher than those of building gypsum.
After gypsum is calcined, it needs to be ground into powder. Gypsum made into powder has a wider range of applications and is more frequently used in construction. Nowadays, powder factories have increasingly higher requirements for mass production. Many business owners have demands for large-scale mass production, believing that large production lines are easier to maintain. In fact, this is a double-edged sword. Although high-output grinding mills have a large hourly production capacity and can complete a lot of production with one piece of equipment, maintenance usually takes longer and the equipment is not working during maintenance. If multiple small grinding mills are selected for joint production, these mills can be maintained at intervals. When one grinding mill is shut down, the others can still operate normally. Therefore, blindly pursuing equipment with huge production capacity is also not feasible. Multiple aspects need to be taken into consideration.
The CRRM grinding mill series produced by Shanghai Cronus Machinery Co., Ltd. has multiple production capacity levels, ranging from 1 to 80t/h, and fineness from 80 to 400 mesh. It is suitable for grinding various materials, and dehydrated gypsum is one of them. Grinding gypsum powder has the following advantages:
- The unique design increases the output by 20-30% compared with other mills under the same power conditions. Under the action of high-pressure springs, the grinding pressure exerted by the grinding rollers on the materials is increased by 800-1200KG.
- The finished product particle size range is wide, with the coarse particle size reaching up to 0.95 millimeters (20 mesh).
- The dust removal effect meets the dust emission standards.
- The analyzer is easy to adjust.
- The grinding roller device adopts an overlapping multi-stage seal, which has excellent sealing performance.
The grinding system includes a crusher (fine jaw crusher or hammer crusher), a hoist, a silo, a feeder, the main mill (with a reducer at the bottom, followed by an air duct, a star-shaped frame assembly, grinding rings, grinding rollers, an analyzer, a flexible connection part, and an analyzer at the top), pipelines, a powder collector, a discharge device, a fan, etc. Through the co-production of multiple grinding mills, the high-pressure grinding mill grinding system can meet the production requirements of a larger amount of gypsum powder. With reasonable maintenance arrangement, it can achieve continuous production and high efficiency.
