ZA763014B - Process and apparatus for the conversion of gypsum into calcium sulphate hemihydrate - Google Patents

Process and apparatus for the conversion of gypsum into calcium sulphate hemihydrate

Info

Publication number
ZA763014B
ZA763014B ZA763014A ZA763014A ZA763014B ZA 763014 B ZA763014 B ZA 763014B ZA 763014 A ZA763014 A ZA 763014A ZA 763014 A ZA763014 A ZA 763014A ZA 763014 B ZA763014 B ZA 763014B
Authority
ZA
South Africa
Prior art keywords
gypsum
conversion
calcium sulphate
sulphate hemihydrate
hemihydrate
Prior art date
Application number
ZA763014A
Other languages
English (en)
Inventor
A Charlet
J Coquery
F Mounier
Original Assignee
Rhone Poulenc Ind
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 Rhone Poulenc Ind filed Critical Rhone Poulenc Ind
Publication of ZA763014B publication Critical patent/ZA763014B/xx

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • 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
    • C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
    • C04B11/0283—Fluidised beds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
ZA763014A 1975-05-23 1976-05-20 Process and apparatus for the conversion of gypsum into calcium sulphate hemihydrate ZA763014B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7516119A FR2311764A1 (fr) 1975-05-23 1975-05-23 Procede et appareil pour la transformation thermique de gypse

Publications (1)

Publication Number Publication Date
ZA763014B true ZA763014B (en) 1977-04-27

Family

ID=9155595

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA763014A ZA763014B (en) 1975-05-23 1976-05-20 Process and apparatus for the conversion of gypsum into calcium sulphate hemihydrate

Country Status (11)

Country Link
US (1) US4247518A (fr)
JP (1) JPS52795A (fr)
BR (1) BR7603245A (fr)
DE (1) DE2622994B2 (fr)
FR (1) FR2311764A1 (fr)
GB (2) GB1549030A (fr)
GR (1) GR58250B (fr)
IT (1) IT1061560B (fr)
MX (1) MX3470E (fr)
TR (1) TR19196A (fr)
ZA (1) ZA763014B (fr)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2727544C2 (de) * 1977-06-18 1987-01-22 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Verfahren zum Trocknen und Brennen von Gips-Dihydrat zu Gips-Halbhydrat
CH645083A5 (de) * 1980-05-20 1984-09-14 Escher Wyss Ag Verfahren und vorrichtung zum rekalzinieren einer calciumkarbonat enthaltenden schlaemme.
JPS5745335A (en) * 1980-09-02 1982-03-15 Mitsui Eng & Shipbuild Co Ltd Heating fluidized bed reactor
US4475884A (en) * 1982-11-30 1984-10-09 The United States of America as represented by the United States _Department of Energy Reversed flow fluidized-bed combustion apparatus
US4503018A (en) * 1983-02-14 1985-03-05 Davy Mckee Corporation Desulfurization of phosphogypsum
US4533528A (en) * 1983-07-15 1985-08-06 United States Gypsum Company Process for continuously calcining gypsum to low dispersed consistency stucco
CA1258961A (fr) * 1984-09-17 1989-09-05 Yoshihiko Kudo METHODE DE PREPARATION DE GYPSE SEMI-HYDRATE DE FORME .alpha.
US4946658A (en) * 1986-11-06 1990-08-07 Florida Institute Of Phosphate Research Addition of pyritic materials to feed mix for desulfurization of phosphogypsum
DE3721421A1 (de) * 1987-06-29 1989-01-12 Deutsche Filterbau Verfahren zum herstellen von trockenen kalzium-sulfatdihydraten aus rauchgasgips
DE3738301A1 (de) * 1987-11-11 1989-05-24 Peters Ag Claudius Verfahren und vorrichtung zum brennen von gips
GB2214836B (en) * 1988-02-08 1991-06-26 Bpb Industries Plc Improvements in method and apparatus for calcination
US4917024A (en) * 1989-05-24 1990-04-17 Florida Institute Of Phosphate Research Coal fired power plant with pollution control and useful byproducts
US5198029A (en) * 1989-08-01 1993-03-30 Gte Products Corporation Apparatus for coating small solids
GB8917963D0 (en) * 1989-08-05 1989-09-20 Scras Apparatus for repeated automatic execution of a thermal cycle for treatment of biological samples
DD296058A5 (de) * 1990-02-19 1991-11-21 Veb Zementwerke Ruedersdorf,De Verfahren zum dehydratisieren von anfallgipsen
US5143698A (en) * 1990-03-05 1992-09-01 Uop Apparatus for internal backmix cooling
FR2660303B1 (fr) * 1990-03-27 1992-07-17 Electricite De France Procede et dispositif de formation d'oxyde de calcium.
US5139749A (en) * 1990-06-22 1992-08-18 Tas, Inc. Fluidized calcining process
DE4109743C2 (de) * 1991-03-25 1995-03-23 Escher Wyss Gmbh Verfahren zur thermischen Behandlung von feuchten Hydraten
AT397929B (de) * 1992-12-04 1994-08-25 Chemiefaser Lenzing Ag Verfahren und anlage zur trocknung und anschliessenden spaltung
US5743728A (en) * 1995-08-15 1998-04-28 Usg Corporation Method and system for multi-stage calcining of gypsum to produce an anhydrite product
DE19606075C2 (de) * 1996-02-19 2000-02-17 Sulzer Chemtech Gmbh Verfahren und Vorrichtungen zur thermischen Behandlung von Gips
DE19627249C2 (de) * 1996-07-08 2002-01-17 Sicowa Verfahrenstech Verfahren zur Herstellung von praktisch phasenreinem Calciumsulfat-beta-Halbhydrat
FR2836913B1 (fr) 2002-03-08 2006-11-24 Lafarge Platres Dispositif de sechage et/ou cuisson de gypse
EP1726575A1 (fr) * 2005-05-27 2006-11-29 Promat International N.V. Procédé pour la préparation du plâtre et plâtre obtenu
WO2007084346A2 (fr) * 2006-01-13 2007-07-26 Certainteed Gypsum, Inc. Système et procédé destinés à la production de plâtre de type alpha par récupération de chaleur
US8388926B2 (en) 2006-01-13 2013-03-05 Certainteed Gypsum, Inc. System and method for the production of gypsum using heat recovery
UA103890C2 (uk) * 2008-02-19 2013-12-10 Юнайтед Стейтс Джипсум Компані Спосіб та пристрій для кальцинування гіпсу під тиском
EP2163532A1 (fr) * 2008-09-11 2010-03-17 Claudius Peters Technologies GmbH Procédé et installation destinés à la fabrication de plâtre dur
US7897134B1 (en) * 2009-08-07 2011-03-01 Alstom Technology Ltd System and method for calcining gypsum
CN102491659B (zh) * 2011-12-02 2013-03-27 宋乐柱 一种流化床式石膏煅烧装置
CN115594428B (zh) * 2022-10-26 2023-11-24 宜都兴发化工有限公司 一种磷石膏mvr干燥装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498405A (en) * 1946-03-11 1950-02-21 Jeffrey Mfg Co Continuous vibrating reaction chamber
US2797908A (en) * 1956-05-10 1957-07-02 Zubrzycki Boleslaw Joseph Zoning device for horizontal fluo-solid beds
NL274784A (fr) * 1961-02-14
NL136768C (fr) * 1962-02-27
US3869256A (en) * 1972-09-28 1975-03-04 Atomic Energy Commission Continuous fluid bed reactor for fissionable material
GB1504282A (en) * 1974-02-16 1978-03-15 Farrel Bridge Ltd Methods of and apparatus for treating particulate material with a gas

Also Published As

Publication number Publication date
MX3470E (es) 1980-12-09
FR2311764B1 (fr) 1980-07-11
DE2622994B2 (de) 1978-05-24
GB1549030A (en) 1979-08-01
DE2622994C3 (fr) 1979-01-18
GR58250B (en) 1977-08-31
DE2622994A1 (de) 1976-12-09
GB1549029A (en) 1979-08-01
JPS52795A (en) 1977-01-06
IT1061560B (it) 1983-04-30
JPS5413437B2 (fr) 1979-05-30
TR19196A (tr) 1978-06-01
US4247518A (en) 1981-01-27
BR7603245A (pt) 1977-01-25
FR2311764A1 (fr) 1976-12-17

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