Gypsum powder complete equipment is an industrial system used to process natural gypsum or industrial by-product gypsum (such as desulfurization gypsum, phosphogypsum) into gypsum powder for construction. It is widely used in building materials, cement retarders, putty powder, gypsum board and other fields. The core process flow includes crushing → grinding → calcination → drying → packaging. The entire system is operated by multiple functional modules in coordination, and has the characteristics of automation, environmental protection, and scale.
Equipment composition and process flow
|System module | Core equipment | Function description | Technical features|
|Crushing system | Jaw crusher, impact crusher | Crushing large gypsum raw materials (≤ 500mm) to ≤ 10mm particle size | Suitable for high hardness materials, uniform discharge, low maintenance cost|
|Grinding system | Raymond mill (YGM series), vertical mill (LM series), European version mill (MTW series) | Grind crushed materials to a fineness of 80-3000 mesh | Vertical mill integrates crushing, drying, grinding, and grading, reducing energy consumption by more than 30%; Raymond mill is suitable for processing medium and fine powders, with adjustable discharge particle size|
|Calcination system | Boiling furnace, rotary kiln | Control gypsum crystal form at 190-800 ℃, remove crystallization water to generate β - hemihydrate gypsum | Boiling furnace has high thermal efficiency and precise temperature control, suitable for desulfurization gypsum; Rotary kiln is suitable for large-scale continuous production|
|Drying system | Rotary drum dryer, rotary flash dryer | Reduce raw material moisture (feed moisture ≤ 15%) | Adopt hot air counterflow/parallel flow heat transfer, equipped with automatic temperature control and dust removal system|
|Electrical Control System | DCS/PLC Automation Control System | Achieve full process automatic monitoring, parameter adjustment, and fault alarm | Support remote operation, data traceability, in compliance with Industry 4.0 standards|
|Dust removal system | Pulse bag filter, cyclone separator | Collect dust generated during the production process to ensure emission standards | Dust recovery rate>99%, meeting national environmental standards|
|Packaging System | Gypsum Powder Automatic Packaging Machine (Vertical/Horizontal) | Integrated Measurement, Bag Making, Sealing, and Stacking Operations | Adopting Spiral Measurement+PLC Control, Accuracy ± 0.2%, Supports Ton Bag/Small Bag Packaging|
Note: Equipment selection should be comprehensively configured based on the type of raw materials (natural gypsum/desulfurization gypsum), production capacity requirements (50000-500000 tons/year), and finished product fineness (such as 120 mesh, 200 mesh, 325 mesh). Due to the concentration of the building materials industry in Linyi, Shandong, local suppliers such as Linyi Yuanteng Machinery and Anqiu Boyang Machinery provide customized whole line solutions.
Typical application scenarios
Architectural gypsum powder: used for interior wall putty, plastering mortar, gypsum board raw materials, with a fineness requirement of 80-120 mesh.
Cement retarder: Use desulfurization gypsum powder to adjust the setting time of cement, with a fineness of ≥ 200 mesh.
Paper faced gypsum board: linked with gypsum board production line, providing high-purity and low impurity board core raw materials.
Utilization of industrial by-product gypsum: desulfurization gypsum from thermal power plants and phosphogypsum from phosphate chemical plants are processed and utilized as resources, in line with the national "dual carbon" policy orientation.
Current technological trends and challenges
Trend:
The equipment is developing towards intelligence and integration, such as the "one click start" fully automatic production line;
The waste heat recovery system and energy-saving boiling furnace have become standard equipment;
Digital twin technology is used for equipment operation and maintenance prediction, reducing downtime rates.
Challenge:
The high moisture content and impurities of desulfurization gypsum increase the cost of pretreatment;
Small manufacturers have low levels of automation in their equipment and fail to meet dust control standards;
The preparation of high fineness (>3000 mesh) gypsum powder has high energy consumption and requires optimization of the grading system.