Technical note: This guide provides general educational information. Actual plant design and operating limits must be established through representative testing, supplier documentation, safety review and site-specific engineering.
What Calcination Changes
- Gypsum dihydrate releases part of its chemically combined water to form hemihydrate
- The crystal form and surface condition influence water demand, setting and strength
- Overheating, under-calcination and variable feed can create unstable plaster
Variables to Control
- Feed purity, moisture and particle size
- Calciner temperature profile and residence time
- Fuel and air balance
- Product cooling and storage
- Grinding or classification after calcination
- Routine laboratory checks and trend analysis
Next Step
For a plant-specific review, provide raw-material data, process flow, equipment details, product specification and current operating results.