Gypsum Powder Manufacturing Process
The gypsum powder manufacturing process at Hengshui Decheng Machinery & Equipment Co.,Ltd follows a defined sequence to ensure product uniformity, efficiency, and environmental compliance. Below is a detailed overview of each phase.
1. Raw Material Reception and Preparation
Gypsum rock or desulfurization by‑product arrives at the plant and is screened for contaminants. After preliminary crushing, material is stockpiled in yards or silos equipped with feed conveyors.
2. Fine Grinding
Crushed gypsum is transferred to a grinding mill. The mill’s classifier adjusts to produce the desired particle size distribution, typically between 200 and 400 mesh. Real‑time monitoring of mill output ensures consistent fineness.
3. Calcination
The fine powder is fed into a rotary kiln or flash dryer. Temperatures of 150–180 °C drive off bonded water, converting gypsum dihydrate into calcium sulfate hemihydrate. Controlled residence time avoids under‑ or over‑calcination, both of which can impair setting properties.
4. Cooling and Stabilization
The hot, calcined powder passes through a cooling chamber, where indirect air prevents moisture uptake. Temperature sensors verify that powder exits at below 50 °C, preserving flowability and chemical stability.
5. Storage and Blending
Cooled powder is stored in aerated silos to prevent caking. Optional blending stations allow precise addition of setting modifiers, retarders, or strength‑enhancing fibers to tailor the final product for specific end‑use applications.
6. Packaging and Dispatch
Automated packaging lines weigh and fill bags, which are then heat‑sealed and palletized. Bulk options—such as pneumatic tanker loading—are available for large consumers. Completed orders are logged in the dispatch system and scheduled for shipment.
7. Quality Control
Throughout each stage, samples are taken to test moisture content, particle size distribution, and gypsum purity. Process parameters are adjusted in real time via the plant’s control system to maintain tight tolerances.
By following this structured manufacturing process, Hengshui Decheng Machinery & Equipment Co.,Ltd ensures its gypsum powder consistently meets technical specifications and performance requirements across a range of end‑use industries.
