GB886602A - Method for the dehydration of gypsum and for the hydration of gypsum anhydride - Google Patents
Method for the dehydration of gypsum and for the hydration of gypsum anhydrideInfo
- Publication number
- GB886602A GB886602A GB18560A GB18560A GB886602A GB 886602 A GB886602 A GB 886602A GB 18560 A GB18560 A GB 18560A GB 18560 A GB18560 A GB 18560A GB 886602 A GB886602 A GB 886602A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gypsum
- dehydrated
- dehydration
- heating zone
- layers
- 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 10
- 239000010440 gypsum Substances 0.000 title abstract 10
- 230000018044 dehydration Effects 0.000 title abstract 3
- 238000006297 dehydration reaction Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 150000008064 anhydrides Chemical class 0.000 title 1
- 230000036571 hydration Effects 0.000 title 1
- 238000006703 hydration reaction Methods 0.000 title 1
- 238000010438 heat treatment Methods 0.000 abstract 4
- 239000007789 gas Substances 0.000 abstract 3
- 229910052925 anhydrite Inorganic materials 0.000 abstract 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 150000004683 dihydrates Chemical class 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000011343 solid material Substances 0.000 abstract 1
- 239000004449 solid propellant Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
In a method for the dehydration of gypsum one or more layers of gypsum are placed on a continuous grate and conveyed through a heating zone in which heating at 150 DEG to 1000 DEG C. is effected by means of a chemical reaction in, or sensible heat of, gas passing through the grate and the gypsum either from bottom to top or from top to bottom. Hot gases, e.g. from oil-fired equipment, or combustible gases, may be used. The gypsum may be in layers of different granular size, and may be mixed with solid fuel and materials which increase or decrease the setting time of the resulting dehydrated gypsum when mixed with water, or make it more workable. The heating zone may be sub-divided into zones of different temperature, and the product may be cooled with air to fix the degree of dehydration. Agglomerates of gypsum dihydrate and anhydrite may be dehydrated, and raw gypsum or partially dehydrated gypsum may be added to the material being dehydrated during its passage through the heating zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18560A GB886602A (en) | 1960-01-04 | 1960-01-04 | Method for the dehydration of gypsum and for the hydration of gypsum anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18560A GB886602A (en) | 1960-01-04 | 1960-01-04 | Method for the dehydration of gypsum and for the hydration of gypsum anhydride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB886602A true GB886602A (en) | 1962-01-10 |
Family
ID=9699895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18560A Expired GB886602A (en) | 1960-01-04 | 1960-01-04 | Method for the dehydration of gypsum and for the hydration of gypsum anhydride |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB886602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3996333A (en) * | 1975-08-28 | 1976-12-07 | Southwire Company | Method for dehydrating ores |
-
1960
- 1960-01-04 GB GB18560A patent/GB886602A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3996333A (en) * | 1975-08-28 | 1976-12-07 | Southwire Company | Method for dehydrating ores |
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