gypsum powder production line

The gypsum powder production line of which the material is natural gypsum, are equipped with many advanced technological equipment in domestic and foreign such as material averaging device, double-grade crushing system, plate type conveyor, vertical mill, Ramon mill, gypsum boiling kiln, cooling machine and waste heat recycling system, ect. The boiling kiln is widely used in our nation with the advantages of small, simple, great output, small occupied area, easy control, perfect gypsum microstructure, stable physical properties and low running cost. It has been sold to Thailand, Uzbekistan, Tajikistan and Tanzania.

Gypsum powder can be used as: paper-faced gypsum board, plastering gypsum mortar, gypsum strips, gypsum blocks,self-leveling gypsum mortar, laminated board, various decorative boards, etc. Low energy consumption for gypsum production: about one-fourth of that of cement production. It is the most popular green, environmentally friendly and livable building material in the world today!

The gypsum powder production line with natural gypsum as raw material is equipped with a variety of advanced technical equipment at home and abroad. The gypsum stone is crushed into granule less than 25mm with crusher. It’s stored in raw material silo,then conveyed into grinding mill to make gypsum powder. The powder is classified through a classifier. The qualified powder in required fineness shall be carried to the calciner, while the unqualified powder shall be returned to the grinding mill for furhter process.

Production flow chart

STEP1. crushing system 

The size and specifications of gypsum ores are different after mining, and the applicable crushing equipment is selected for preliminary crushing treatment according to the actual situation, and the particles with particle size not greater than 35mm are broken.

STEP2. storage conveying system 

The crushed gypsum raw material is transported to the storage bin by the elevator. The storage bin is designed according to the requirements of the material storage time to ensure the stable supply of materials. At the same time, all parts of the material turnover are using lifts to reduce the floor area.

STEP3. grinding system 

The grinding process is the core process of gypsum powder production. The gypsum raw material in the storage bin enters the grinding machine through the vibration feeder for finishing. The electromagnetic vibration feeder is set under the storage bin, which is interlocked with the mill to adjust the supply of materials in time according to the running condition of the mill.

The material is uniformly and continuously fed into the mill by the electromagnetic vibration feeder for grinding.

The pulverized gypsum powder is blown out by the air flow from the mill blower and graded by the analytical machine above the main engine. The powder with the fineness meeting the specifications enters the large cyclone collector with the air flow, and is discharged as the finished product through the powder outlet pipe after collection.

The finished product falls into the screw conveyor and is transported to the next system for calcining. The air flow flows from the return duct of the cyclone collector into the blower. The whole air path system is closed circulation and flows under negative pressure. Due to the water contained in the ground raw materials and the evaporation into gas during the grinding process, resulting in an increase in the air volume in the circulating air path, the increased air volume is introduced from the pipe between the large cyclone collector and the blower to the bag dust collector, and then discharged into the environment to ensure that the environment is clean.

The particle size of the material through the grinding system is changed from 0-30mm to 80-120 mesh, which meets the requirements of the fineness of gypsum powder.

STEP4. calcining system 

After grinding is completed, the pulverized gypsum powder is sent to the rotary kiln for calcining by the powder separator, the plaster of Paris is sent to the storage storage by the elevator, and the materials that do not meet the requirements are continued to be returned to the mill for grinding; The system mainly includes lifting machine, boiling furnace, electrostatic dust removal, Roots fan and other equipment.

STEP5. electrical control system 

The electrical control system adopts the current advanced centralized control, DCS control or PLC control, and the control components are selected internationally well-known brand products