GB1087549A - Process of calcining gypsum - Google Patents

Process of calcining gypsum

Info

Publication number
GB1087549A
GB1087549A GB5271064A GB5271064A GB1087549A GB 1087549 A GB1087549 A GB 1087549A GB 5271064 A GB5271064 A GB 5271064A GB 5271064 A GB5271064 A GB 5271064A GB 1087549 A GB1087549 A GB 1087549A
Authority
GB
United Kingdom
Prior art keywords
vessel
gypsum
powdered
sufficient
calcined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5271064A
Inventor
Robert Colvin Blair
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BPB Ltd
Original Assignee
BPB Industries PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BPB Industries PLC filed Critical BPB Industries PLC
Priority to GB5271064A priority Critical patent/GB1087549A/en
Publication of GB1087549A publication Critical patent/GB1087549A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/02—Methods and apparatus for dehydrating gypsum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

A process for calcining gypsum, as described in the parent Specification 1,018,464, in which a layer of powdered gypsum only sufficient to cover the bottom of the calcination vessel is calcined whereupon further powdered gypsum is continuously added at the upper end of the vessel to cause calcined gypsum to be discharged through a rising conduit in communication with the lower end of the vessel by the pressure of the head of material in the vessel. The temperature of the vessel is maintained constant during the continuous addition of gypsum, e.g. by controlling the rate of addition of powdered gypsum. The vessel may be heated whilst the initial layer is being introduced. The initial layer may be sufficient to seal off the lower end of the rising conduit.
GB5271064A 1964-12-29 1964-12-29 Process of calcining gypsum Expired GB1087549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5271064A GB1087549A (en) 1964-12-29 1964-12-29 Process of calcining gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5271064A GB1087549A (en) 1964-12-29 1964-12-29 Process of calcining gypsum

Publications (1)

Publication Number Publication Date
GB1087549A true GB1087549A (en) 1967-10-18

Family

ID=10464981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5271064A Expired GB1087549A (en) 1964-12-29 1964-12-29 Process of calcining gypsum

Country Status (1)

Country Link
GB (1) GB1087549A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533528A (en) * 1983-07-15 1985-08-06 United States Gypsum Company Process for continuously calcining gypsum to low dispersed consistency stucco
US5743728A (en) * 1995-08-15 1998-04-28 Usg Corporation Method and system for multi-stage calcining of gypsum to produce an anhydrite product
US5927968A (en) * 1995-02-02 1999-07-27 United States Gypsum Company Apparatus for continuous refractoryless calcining of gypsum
US7175426B2 (en) 2004-02-27 2007-02-13 United States Gypsum Company High efficiency refractoryless kettle
US7434980B2 (en) 2004-02-27 2008-10-14 United States Gypsum Company Swinging agitator for a gypsum calcining apparatus and the like

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533528A (en) * 1983-07-15 1985-08-06 United States Gypsum Company Process for continuously calcining gypsum to low dispersed consistency stucco
US5927968A (en) * 1995-02-02 1999-07-27 United States Gypsum Company Apparatus for continuous refractoryless calcining of gypsum
US5743728A (en) * 1995-08-15 1998-04-28 Usg Corporation Method and system for multi-stage calcining of gypsum to produce an anhydrite product
US5954497A (en) * 1995-08-15 1999-09-21 Usg Corporation Method for multi-stage calcining of gypsum to produce an anhydrite product
US7175426B2 (en) 2004-02-27 2007-02-13 United States Gypsum Company High efficiency refractoryless kettle
US7434980B2 (en) 2004-02-27 2008-10-14 United States Gypsum Company Swinging agitator for a gypsum calcining apparatus and the like

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