Our company has the technology of establishing wet process alpha producing line, the raw material can be both chemical and natural gypsum, the heating resources can be both coal and natural gas, and the heating will be delivered to product both though steam and thermal oil, it is depend on the requirement of customers.
With this technology, you will ge good shape crystal, and the data sheet of the final alpha will be as following:
Consistency: 32-40%,
Initial setting time: More than 2 minutes (can be adjusted)
Final setting time: 7-10 minutes (can be adjusted)
2 hours bending strength: More than 6.0MPa
Expansion coefficient 0.2-0.5%
The final product can be used in building material field and other precision moulding field, and if the raw material is natural gypsum, it can be used for dental plaster too.
This system need low investment, and will save energy, which is your best choice for making alpha plaster powder.