METHOD OF CURING GYPSUM CALCINATION PRODUCT Russian patent published in 2018 - IPC C04B11/02 C04B11/28 C04B28/14 C04B40/00 

Abstract RU 2671375 C2

FIELD: chemistry.

SUBSTANCE: invention relates to a method of conditioning stucco, which comprises steps of supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate hemihydrate and/or calcium sulphate anhydrite, as well as calcium sulphate dihydrate; and conditioning the stucco particles at a temperature of at least 100 °C and humidity of at least 70 %. During the step of conditioning the stucco particles, the bulk density of the stucco particles in the reaction vessel is at least 1 g/cm3. Moisture content of at least 70 % is ensured by the release of molecules of chemically bound water from the calcium sulphate dihydrate particles.

EFFECT: technical result is a decrease in the total setting time while maintaining the fluidity of the stucco suspension in the early stages of the process.

15 cl, 6 tbl, 18 ex

Similar patents RU2671375C2

Title Year Author Number
METHOD OF PRODUCING MIXTURE OF VERY LOW CONSISTENCY ALPHA AND BETA GYPSUM PLASTER 2007
  • Ju K'Jang
  • Linn Majkl R.
  • Song Vejksin Dehvid
  • Liu Kingks'Ja
  • Klaud Majkl Li
RU2458014C2
METHOD OF PRODUCING GYPSUM 2008
  • Turkki Tar'Ja
  • Khejska Perttu
  • Khagel'Berg Pasi
  • Laakso Vejkko
RU2448049C2
GYPSUM PRODUCT AND PREPARATION METHOD THEREOF 2008
  • Aksela Rejo
  • Grenfors Outi
  • Khagel'Berg Pasi
  • Khejska Perttu
  • Kangaslakhti Khanna-Mari
  • Kerjalja Jori
  • Reunanen Jarmo
  • Tirronen Ehsko
  • Turkki Tar'Ja
RU2448906C2
CALCIUM SULPHATE-BASED PRODUCTS WITH INCREASED WATER RESISTANCE 2010
  • Fisher Robin
RU2543008C2
METHOD FOR PRODUCING PHOSPHORIC ACID AND CALCIUM SULFATE OF A QUALITY SUITABLE FOR THE PROCESS OF OBTAINING CLINKER FOR COMMERCIAL AND INDUSTRIAL USE OF CALCIUM SULFATE 2021
  • Stockhoff, Peter
  • Helmle, Stefan
  • Rivas Villarreal, Deyvi Javier
  • Daheim, Nicolai
RU2798658C1
METHOD FOR PRODUCING GYPSUM-CONTAINING BUILDING MATERIAL AND BUILDING MATERIAL PREPARED THEREBY WITH KETENE DIMERS AS HYDROPHOBING AGENT 2014
  • Gerig Uve
  • Meller Klaus
  • Shinabek Mikhael
  • Pikhler Martin
  • Pakush Joakhim
  • Yans Ekkekhard
RU2655055C2
METHOD FOR PRODUCTION OF GYPSUM BINDING AGENT 2006
RU2351557C2
METHOD AND DEVICE FOR CALCINATION OF GYPSUM UNDER PRESSURE 2009
  • Ljuan Uehngi
  • Liu Ksingksia
RU2506227C2
METHOD OF PRODUCING PREFABRICATED CONSTRUCTION MATERIAL 2015
  • Gerig Uve
  • Yans Ekkekhard
  • Shinabek Mikhael
  • Pikhler Martin
  • Pekmezdzhi Akif
  • Ergin Mekhmet
RU2691239C2
INTEGRATED METHOD OF PROFITABLE AND INDUSTRIAL UTILIZATION OF CALCIUM SULFATE WITH OBTAINING RARE EARTH ELEMENTS IN THE PRODUCTION OF PHOSPHORIC ACID 2021
  • Helmle, Stefan
  • Stockhoff, Peter
  • Daheim, Nicolai
RU2800449C1

RU 2 671 375 C2

Authors

Bigene Sedrik

Dates

2018-10-30Published

2015-01-08Filed