Gipscalcination in überhitzter Dampfatmosphäre. Ein neues Verfahren mit verringertem Energiaufwand and verbesserter Produktqualität

Stig Stenström, M Hermansson

Research output: Contribution to journalArticlepeer-review


Gypsum calcination in superheated steam is investigated. It is shown that superheated steam positively influences the formation of hemihydrate and avoids formation of anhydrite. By measuring the specific surface area the products are shown mainly to consist of alpha-hemihydrate. By recovering the heat of vaporization a specific energy use of 379 kJ/kg dihydrate can be obtained. This is substantially lower than the energy used both in existing alpha-hemihydrate and beta-hemihydrate processes. A process flow-sheet is proposed based on the presented results.
Original languageGerman
Pages (from-to)467
Issue number9
Publication statusPublished - 1992

Subject classification (UKÄ)

  • Chemical Engineering

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