Building gypsum is a product that uses gypsum as raw material and is ground after calcination, also known asβType I hemihydrate gypsum is the main raw material for gypsum products such as gypsum plasterboard, fiber gypsum board and gypsum decorative board. The main machine in the production equipment of building gypsum powder is gypsum grinding mill equipment. At present, there are three types of gypsum grinding mill equipment: gypsum Raymond mill, wind sweep mill and gypsum vertical roller mill. As the manufacturer of gypsum vertical roller mill, HCMilling(Guilin Hongcheng) will introduce the advantages of gypsum vertical roller mill as the production equipment of building gypsum powder.

The process flow of gypsum vertical mill as the production equipment of building gypsum powder is: beneficiation →crushing (jaw breaking)→ grinding dehydration → aging → packaging. This process will grind and dehydrate gypsum in the same gypsum vertical roller mill equipment. The dehydration speed is very fast, and can be completed in a few seconds. The process flow is simple, the floor space is small, the investment is low, the production energy consumption is low, the degree of automation is high, and the product quality is stable. On the basis of digesting and absorbing foreign advanced technology, our company has designed and manufactured HLM gypsum vertical roller mill suitable for this production process, and has been successfully put into operation.

HLM gypsum vertical roller mill is mainly composed of separator, grinding roller, grinding plate, pressurizing device, motor, reducer, shell, etc. The separator is an important part to ensure the fineness of the product. It is composed of speed regulation, motor, reducer, housing, air outlet, etc; The grinding roller is the main part for rolling materials, which is composed of roller sleeve, roller core, shaft, bearing, etc; The grinding plate is fixed on the output shaft of the reducer, and there is an annular groove on the grinding plate, which is the rolling groove for grinding materials; The pressurizing device is an important part to provide grinding pressure, which is composed of high-pressure oil station, hydraulic cylinder, pull rod, accumulator, etc; The reducer not only plays the role of reducing speed, transmitting power and driving the grinding plate to rotate.

Working principle of HLM gypsum vertical grinding mill: the motor drives the grinding plate to rotate through the reducer, while the high temperature hot air enters the mill from the air inlet, the gypsum raw material falls into the center of the grinding plate from the feeding port, moves to the edge of the grinding plate under the action of centrifugal force, and is crushed by the grinding roller when passing through the annular groove on the grinding plate. The crushed material continues to move towards the edge of the grinding plate until it is picked up by the high-speed hot air flow at the wind ring. At the same time, the attached water and crystal water carried by the fine gypsum powder are removed. When the material in the air flow passes through the separator, under the action of the rotor, the coarse powder falls onto the grinding plate and is grinded again. The qualified fine powder comes out of the mill with the air flow, and is collected and cooled in the dust collection device of the system, which is the product.

Advantages of HLM gypsum vertical roller mill as a production equipment for building gypsum powder:

① The grinding dehydration efficiency is high. The gypsum vertical roller mill uses the material bed grinding principle to grind the materials, and uses gas to transport the materials. The specific surface area of the ground materials increases, and the contact with the hot gas is sufficient. In this thermal dynamic environment, the gypsum fine powder is very easy to dehydrate quickly and completely.

② Uniform particle grading, product three-phase (soluble anhydriteβThe proportion of type hemihydrate gypsum and residual dihydrate gypsum is stable. The material only stays in the mill for 2~3min, while the rotary kiln or frying pan takes 10~20min.

③ The process flow is simple and the building area is small. When the gypsum vertical roller mill works, high temperature hot air is introduced, and the materials are ground and dehydrated at the same time, and the dust containing gas from the grinding can directly enter the high-temperature resistant bag dust collector and be collected as products. Therefore, the process flow is simple and the layout is compact, which is about 20%~30% of the building area of rotary kiln or frying pan used in the same production scale.

④ Low noise, less dust, high automation and high operation rate.

⑤ Low investment and quick results.

A place in Shandong Province, China, is rich in gypsum resources, with excellent quality, sufficient power and coal, and convenient transportation, which provides good conditions for the deep processing, production, supply and marketing of gypsum minerals. But the original one has an annual output of 20000 tons α Type B high-strength gypsum powder production line can only produce one product with low output and high energy consumption, which is difficult to form scale benefits. In order to improve economic efficiency and strengthen the strength of the enterprise, the factory purchased gypsum vertical roller mill as the production equipment of building gypsum powder, and built a new line with an annual output of 60000 tons βThe production line of building gypsum powder has achieved good economic benefits. If you want to know more about the equipment details of gypsum vertical roller mill, please contact mkt@hcmilling.com or call at +86-773-3568321, HCM will tailor for you the most suitable grinding mill program based on your needs, more details please check www.hcmilling.com. Our selection engineer will plan scientific equipment configuration for you and quote for you.