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.
Main Differences
- Alpha hemihydrate generally forms denser, more regular crystals under controlled pressure or solution conditions
- Beta hemihydrate is commonly produced by dry calcination and generally has higher water demand
- Lower water demand can support higher hardened density and strength when other variables are controlled
Selection Factors
- Required strength and surface finish
- Casting or building-material application
- Raw-material quality
- Capital and operating complexity
- Cycle time and quality-control capability
Next Step
For a plant-specific review, provide raw-material data, process flow, equipment details, product specification and current operating results.