Gypsum powder is one of the top five gel material, occupies an important position in the national economy, gypsum powder production line natural the dihydrate gypsum ore (Gypsum Fibrosum) or industrial by-product gypsum is calcined and pulverized after a certain temperature heating, the dihydrate gypsumdehydration decomposition, the obtained product, β-hemihydrate gypsum as a main component of the building plaster (pass of plaster of Paris).
Gypsum powder production works gypsum Fibrosum, gypsum added from the inlet, effective contact with the heat transfer tube outer wall of the cylinder body, the use of fluidized bed combustion boiler flue gas as the medium of FGD gypsum heating calcined and calcined products collected from the discharge port. Because the sake of the indirect heat exchanger, the cylinder body can be obtained a high steam partial pressure, which have a positive impact on product quality, in addition, the gypsum is no direct contact with the heat carrier, to maintain maximum product purity. Indirect heat exchange Rotary the calcined machine technology can effectively control the by strict control calcined strength to plaster off from dihydrate gypsum hemihydrate gypsum. This process uses advanced technology, the use of fluidized bed furnace to provide heat, minimize coal consumption and make full use of the heat, Nissan 100-1000 tonnes, is ideal industrial gypsum calcination process equipment.
Gypsum powder production process
Crusher to the large size of the gypsum ore broken into small pieces particles of less than 30mm, transport to the mill for grinding required by the classifiers achieve the product after grinding fineness gypsum cornstarch into the the boiling furnace for calcination,the rest back to the mill grinding until qualified again. Qualified calcined gypsum powder into the clinker storage memory or into the products workshop use.
Gypsum powder production process and equipment selection
According to the technological requirements of building gypsum powder production line is usually divided into five parts, namely a crushing system, grinding system, calcined system, storage material handling systems and electronic control systems.
1:Crushing systemgypsum raw material through the feeder into the crusher, crusher large size gypsum ore broken into less than 30mm small particles spare. According to the size of the gypsum raw materials and different production needs, you can select the corresponding specifications crusher, jaw crusher usually choose PE, PC hammer crusher, PF impact crusher, etc.. In order to protect the environment clean, can be equipped with a dust removal equipment to meet environmental emission requirements.
2:Raw material feeding
The crushed gypsum material hoist transport to the storage silos spare. Storage silos according to the requirements of the design specifications of the material storage time, to ensure a stable supply of materials.
3:Grinding system
Material evenly by the electromagnetic vibrating feeder continuously fed into the mill for grinding. The gypsum cornstarch after grinding mill blower bulging Merry blown out of the the host above analysis machine grading. Fineness in line with the specifications of the powder into the cyclone collector with the airflow, collected by a powder discharge pipe shall be finished. Finished products fall into the screw conveyor, the conveyor to the next system calcined. The entire air duct system is a closed loop, from the introduction of the pipeline between the large cyclone collector and blower baghouse, to remove the dust in the air, and then discharged into the environment, to ensure a clean environment. After grinding system of materials by the particle diameter of 0 – 30 mm, was changed to 80 to 120 mesh, to comply with the requirements of the gypsum powder fineness.
4:Calcining system
The system includes a hoist, boiling furnace, electrostatic dust, Roots blowers and other equipment. Boiling furnace of the most widely used building gypsum calcining equipment, compact equipment, the production capacity of simple structure, difficult to damage the device compact, small footprint, low energy consumption, easy to operate, easy to achieve automatic control, product quality, cooked gypsum phase composition ideal physical properties of stable investment in infrastructure Province, seven advantages of low operating costs, is widely used in the calcining process of natural gypsum and chemical gypsum.
5:Electrical control system
The electrical control system adopts advanced centralized control, DCS or PLC control, various control components are selected internationally famous brand products.
Gypsum powder product technical indicators
(1) quality: meet or exceed national building plaster standards (GB9776-2008) requirements.
(2) fineness :80-200 mesh sieve more than 10%.
(3) The flexural strength (raw materials directly): ≥ 1.6Mpa; compressive strength: ≥ 3.0Mpa.
(4) Major phase component:Hemihydrates content: ≥ 60% adjustable
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