Focus on heavy equipment
Focus on heavy equipment
The gypsum powder manufacturing plant is a production line that processes natural gypsum or industrial by-product gypsum into gypsum powder. Its main processes include crushing, grinding, calcining and other links, and finally produces standard building g
The gypsum powder manufacturing plant is a production line that processes natural gypsum or industrial by-product gypsum into gypsum powder. Its main processes include crushing, grinding, calcining and other links, and finally produces standard building g
The gypsum powder manufacturing plant is a production line that processes natural gypsum or industrial by-product gypsum into gypsum powder. Its main processes include crushing, grinding, calcining and other links, and finally produces standard building gypsum powder. This production line can not only process gypsum, but also ultra-fine powder processing of medium and low hardness, non-flammable and explosive brittle materials with Mohs hardness ≤ 6, such as calcite, chalk and more than 100 other materials. Gypsum powder is widely used in construction, building materials, industrial molds and art models, chemical agriculture, food processing, medicine and beauty, etc., and is an important industrial raw material.
The gypsum powder production line is usually divided into five parts, namely the crushing system, storage and conveying system, grinding system, calcination system and electronic control system.
Step 1. Crushing system
After the gypsum ore is mined, its particle size and specifications are different. According to the actual situation, the appropriate crushing equipment is selected for preliminary crushing treatment, and the particles are crushed to a particle size of no more than 35 mm.
Step 2. Storage and conveying system
The crushed gypsum raw materials are transported to the storage bin by the elevator. The storage bin is designed according to the material storage time requirements to ensure a stable supply of materials. At the same time, elevators are used in all links of material turnover to reduce the floor space.
Step 3. Grinding system
The raw materials in the storage bin are fed into the mill through a vibrating feeder, and the electromagnetic vibrating feeder is linked to control the material. After grinding, the powder is classified by the analyzer, and the qualified ones are sent to the cyclone collector with the air flow to become finished products, and are sent to the calcination system by a screw conveyor. The air flow circulates, and the air volume increases due to the evaporation of water, and is discharged into the environment through a bag dust collector. After grinding, the particle size reaches 80-120 mesh.
Step 4: Calcination system
After grinding, the ground gypsum powder is sent to the rotary kiln for calcination through the powder selector, and the gypsum is sent to the silo through the elevator. The material that does not meet the requirements continues to return to the mill for grinding; the system mainly includes elevators, boiling furnaces, electrostatic dust removal, Roots blowers and other equipment.
Step 5: Electrical control system
The electrical control system adopts the current advanced centralized control, DCS control or PLC control, and the control components are all selected from internationally renowned brands.
Applicable to gypsum, bentonite, diabase, limestone, dolomite, barite, talc, etc..
Raw gypsum and desulfurized gypsum are added from the feed port, and effectively contacted with the outer wall of the heat exchange tube in the cylinder. The flue gas of the boiling furnace is used as the medium to heat and calcine the desulfurized gypsum, and the calcined product is collected from the discharge port. Because of the indirect heat exchange, a higher steam local pressure can be obtained in the cylinder, which has a positive impact on the product quality. In addition, the gypsum has no direct contact with the heat carrier, which maintains the purity of the product to the greatest extent. The indirect heat exchange rotary calciner technology can effectively control the gypsum from dihydrate gypsum to hemihydrate gypsum by strictly controlling the calcination intensity. The main technology used in this process uses the boiling furnace to provide a heat source, which can minimize coal consumption and make full use of heat. It is an ideal equipment in the current industrial gypsum calcination process.
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1. High production efficiency: continuous production, close connection between each link; high degree of automation, precise control of parameters, reduced manual intervention, improved stability and consistency, and faster production speed.
2. Excellent product quality: uniform particle size, precise grading equipment and control system; high purity, multi-link impurity removal to meet the needs of different industries.
3. Good environmental protection and energy saving: closed circulation air duct system reduces dust emission; high thermal energy utilization rate, waste heat preheating raw materials, reducing energy consumption.
4. Flexible and strong adaptability: can handle a variety of gypsum raw materials, adjust parameters to adapt to characteristics; can produce products with different fineness and performance to meet the diverse needs of the market.
| Capacity(t/d) | 100 | 200 | 300 | 400 | 500 | 600 | 800 | 1000 |
|---|---|---|---|---|---|---|---|---|
| Gypsum rotary kiln | Ø2.0×24m | Ø2.4×24m | Ø2.8×26m | Ø3.0×26m | Ø3.2×26m | Ø3.4×28m | Ø3.6×28m | Ø4.0×28m |
| Baghouse dust collector | PPC96-6 | PPC96-8 | PPC128-6 | PPC128-9 | PPC96-2×9 | PPC128-2×7 | PPC128-2×9 | PPC128-2×12 |
| Raw material | Dihydrate desulfurized gypsum(dry base)≥90%, attached water content≤15%, water-soluble magnesium oxide(dry base) ≤0.5%,PH value 6-8, chloride ion content(dry base)≤500mg/kg | |||||||
| Power consumption（kw·h/t gypsum powder） | 25±5 | |||||||
| Desulfurized gypsum: gypsum powder | 1.4 : 1 | |||||||
| Setting time | Initial setting≥8min, final setting≤30min | |||||||
| Fineness | ≤5% | |||||||
| Strength（MPa） | 2 hours bending resistance≥3.0MPa, compressive strength≥6.5MPa; | |||||||
| Heat source or fuel | steam, natural gas, pulverized coal | |||||||
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