GB1018464A - Process of and apparatus for calcining gypsum - Google Patents
Process of and apparatus for calcining gypsumInfo
- Publication number
- GB1018464A GB1018464A GB3918662A GB3918662A GB1018464A GB 1018464 A GB1018464 A GB 1018464A GB 3918662 A GB3918662 A GB 3918662A GB 3918662 A GB3918662 A GB 3918662A GB 1018464 A GB1018464 A GB 1018464A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- gypsum
- calcined
- lower region
- conduit
- 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
Links
- 229910052602 gypsum Inorganic materials 0.000 title abstract 7
- 239000010440 gypsum Substances 0.000 title abstract 7
- 238000001354 calcination Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 230000000630 rising effect Effects 0.000 abstract 3
- 239000007789 gas Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/466—Conversion of one form of calcium sulfate to another
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/001—Calcining
- B01J6/004—Calcining using hot gas streams in which the material is moved
-
- 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
-
- 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
- C04B11/0281—Kettles; Marmites; Autoclaves
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Baking, Grill, Roasting (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
<PICT:1018464/C1/1> Gypsum is calcined by heating pulverulent gypsum in a vessel, wherein further gypsum is continuously introduced into the upper region of the vessel and calcined gypsum is thereupon discharged from the lower region of the vessel by displacement through a rising conduit leading from said lower region. The material in the vessel may be maintained in the fluidized state solely by the water vapour evolved, or by hot gases introduced into the lower region of the vessel. The evolution of water vapour is desirably maintained in the rising conduit, and air may further be introduced into the lower part of the conduit. Fig. 1 shows a suitable apparatus, wherein gypsum is introduced at 21 into vessel 11 fitted with mechanical agitator 13, the material in the vessel reaching up to level 29. The vessel is supported in combustion chamber 17, and a rising conduit 24 is provided with discharge weir 28, at about the same level as 29, to discharge calcined gypsum. In a modification (not shown) the heating is effected by hot gases introduced into the lower part of the vessel by a perforated pipe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15296861A | 1961-11-13 | 1961-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1018464A true GB1018464A (en) | 1966-01-26 |
Family
ID=22545214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3918662A Expired GB1018464A (en) | 1961-11-13 | 1962-10-16 | Process of and apparatus for calcining gypsum |
Country Status (10)
| Country | Link |
|---|---|
| BE (1) | BE624555A (en) |
| CH (1) | CH394926A (en) |
| DE (1) | DE1258321B (en) |
| DK (1) | DK115723B (en) |
| ES (1) | ES282399A1 (en) |
| FI (1) | FI47343C (en) |
| GB (1) | GB1018464A (en) |
| LU (1) | LU42643A1 (en) |
| NL (2) | NL141481B (en) |
| SE (1) | SE323614B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2001157A (en) * | 1977-07-15 | 1979-01-24 | Coal Ind | Fluidised bed combustion chambers |
| US4455285A (en) * | 1978-08-08 | 1984-06-19 | Watkins David W | Heat treatment of material |
| US4533528A (en) * | 1983-07-15 | 1985-08-06 | United States Gypsum Company | Process for continuously calcining gypsum to low dispersed consistency stucco |
| FR2581170A1 (en) * | 1985-04-25 | 1986-10-31 | United States Gypsum Co | DROWNED COMBUSTION APPARATUS AND GYPSUM CALCINATION METHOD |
| US4629419A (en) * | 1979-01-08 | 1986-12-16 | Bpb Industries Public Limited Company | Calcination method and apparatus |
| EP0282674A2 (en) * | 1986-10-30 | 1988-09-21 | BPB INDUSTRIES public limited company | Improvements in calcination apparatus |
| US5743954A (en) * | 1995-02-02 | 1998-04-28 | United States Gypsum Company | Method 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 |
| 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 |
| EP2254837A1 (en) * | 2008-02-19 | 2010-12-01 | United States Gypsum Company | Method and apparatus for pressurized calcination of gypsum |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1488665A (en) * | 1973-11-27 | 1977-10-12 | Bpb Industries Ltd | Calcining calcium sulphate dihydrate |
| US4161390A (en) * | 1977-06-16 | 1979-07-17 | United States Gypsum Company | Calcining kettle having multi-pass heating system |
| US4188186A (en) * | 1978-06-22 | 1980-02-12 | Combustion Engineering, Inc. | Automatic calcining kettle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2485317A (en) * | 1943-01-29 | 1949-10-18 | Standard Oil Dev Co | Method of manufacturing plaster of paris |
| GB610439A (en) * | 1946-04-05 | 1948-10-15 | Reginald George Franklin | Improvements in and relating to the dehydration of particulate calcium sulphate |
| FR928217A (en) * | 1946-05-17 | 1947-11-21 | System and method for drying or heat treatment | |
| GB855131A (en) * | 1955-12-01 | 1960-11-30 | Smidth & Co As F L | Improvements relating to apparatus and installations for the cooling of cement or other material which can be fluidised |
-
0
- NL NL285104D patent/NL285104A/xx unknown
- BE BE624555D patent/BE624555A/xx unknown
-
1962
- 1962-10-16 GB GB3918662A patent/GB1018464A/en not_active Expired
- 1962-11-05 NL NL285104A patent/NL141481B/en not_active IP Right Cessation
- 1962-11-05 LU LU42643D patent/LU42643A1/xx unknown
- 1962-11-06 CH CH1296362A patent/CH394926A/en unknown
- 1962-11-09 DK DK483362A patent/DK115723B/en unknown
- 1962-11-10 FI FI201562A patent/FI47343C/en active
- 1962-11-12 ES ES282399A patent/ES282399A1/en not_active Expired
- 1962-11-13 SE SE1218062A patent/SE323614B/xx unknown
- 1962-11-13 DE DEB69612A patent/DE1258321B/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2001157A (en) * | 1977-07-15 | 1979-01-24 | Coal Ind | Fluidised bed combustion chambers |
| GB2001157B (en) * | 1977-07-15 | 1982-07-07 | Coal Ind | Improvements in or relating to fluidised beds |
| US4455285A (en) * | 1978-08-08 | 1984-06-19 | Watkins David W | Heat treatment of material |
| US4629419A (en) * | 1979-01-08 | 1986-12-16 | Bpb Industries Public Limited Company | Calcination method and apparatus |
| US4533528A (en) * | 1983-07-15 | 1985-08-06 | United States Gypsum Company | Process for continuously calcining gypsum to low dispersed consistency stucco |
| FR2581170A1 (en) * | 1985-04-25 | 1986-10-31 | United States Gypsum Co | DROWNED COMBUSTION APPARATUS AND GYPSUM CALCINATION METHOD |
| EP0282674A2 (en) * | 1986-10-30 | 1988-09-21 | BPB INDUSTRIES public limited company | Improvements in calcination apparatus |
| EP0282674A3 (en) * | 1986-10-30 | 1988-12-28 | Bpb Industries Public Limited Company | Improvements in calcination apparatus |
| US5743954A (en) * | 1995-02-02 | 1998-04-28 | United States Gypsum Company | Method for continuous refractoryless calcining of gypsum |
| 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 |
| EP2254837A1 (en) * | 2008-02-19 | 2010-12-01 | United States Gypsum Company | Method and apparatus for pressurized calcination of gypsum |
| EP2254837A4 (en) * | 2008-02-19 | 2012-01-25 | United States Gypsum Co | Method and apparatus for pressurized calcination of gypsum |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1258321B (en) | 1968-01-04 |
| CH394926A (en) | 1965-06-30 |
| ES282399A1 (en) | 1963-02-01 |
| NL141481B (en) | 1974-03-15 |
| LU42643A1 (en) | 1963-01-05 |
| FI47343B (en) | 1973-07-31 |
| NL285104A (en) | |
| DK115723B (en) | 1969-11-03 |
| BE624555A (en) | 1963-03-01 |
| SE323614B (en) | 1970-05-04 |
| FI47343C (en) | 1973-11-12 |
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