GB764537A - Improvements relating to the burning of materials containing sulphates - Google Patents
Improvements relating to the burning of materials containing sulphatesInfo
- Publication number
- GB764537A GB764537A GB9149/54A GB914954A GB764537A GB 764537 A GB764537 A GB 764537A GB 9149/54 A GB9149/54 A GB 9149/54A GB 914954 A GB914954 A GB 914954A GB 764537 A GB764537 A GB 764537A
- Authority
- GB
- United Kingdom
- Prior art keywords
- burnt
- sulphates
- lime
- materials
- present
- 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
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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Sulphates, present in lime or lime sludge which is burnt, are reduced by an agent introduced into the lime after they have been at least partly calcined but while they are still being burnt. The size of the reducing agent particles must be such that they are not small enough to be burnt in the flame, or too coarse e.g. above 2 mms., that incomplete reaction with the sulphates results. Agents specified are, coke coal, oil and gas, and they may be admitted with the fuel.ALSO:Sulphates, present in materials containing also calcium carbonate which are burnt for making cement, are reduced by an agent introduced into the materials after they have been at least partly calcined but while they are still being burnt. Reducing agents e.g. coke, coal, oil or gas, may be blown through the discharge end of the kiln, and must be large enough to contact the materials and not be burnt in the flame, but they should not be so coarse that they do not react completely with all the sulphate present, e.g. not greater than 2 mms. size. They may be admitted with the fuel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK764537X | 1953-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB764537A true GB764537A (en) | 1956-12-28 |
Family
ID=8152687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9149/54A Expired GB764537A (en) | 1953-03-28 | 1954-03-29 | Improvements relating to the burning of materials containing sulphates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB764537A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3044756A (en) * | 1960-02-10 | 1962-07-17 | Dow Chemical Co | Production of cement |
| US3087790A (en) * | 1959-09-04 | 1963-04-30 | Iowa State College Res Found | Reductive decomposition of calcium sulfate |
| FR2184591A1 (en) * | 1972-03-10 | 1973-12-28 | Inst Przemyslu Wiazacych | Calcium hydroxide prepn - by calcining raw materials /industrial waste with carbon before slaking |
| US4225573A (en) * | 1979-01-12 | 1980-09-30 | Idemitsu Kosan Company Limited | Process for reductive calcining of magnesium sulfate |
| US4781903A (en) * | 1985-09-13 | 1988-11-01 | Institut Francais Du Petrole | Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with elemental sulfur |
| US4855117A (en) * | 1985-09-13 | 1989-08-08 | Institut Francais Du Petrole | Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with elemental sulfur |
-
1954
- 1954-03-29 GB GB9149/54A patent/GB764537A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3087790A (en) * | 1959-09-04 | 1963-04-30 | Iowa State College Res Found | Reductive decomposition of calcium sulfate |
| US3044756A (en) * | 1960-02-10 | 1962-07-17 | Dow Chemical Co | Production of cement |
| FR2184591A1 (en) * | 1972-03-10 | 1973-12-28 | Inst Przemyslu Wiazacych | Calcium hydroxide prepn - by calcining raw materials /industrial waste with carbon before slaking |
| US4225573A (en) * | 1979-01-12 | 1980-09-30 | Idemitsu Kosan Company Limited | Process for reductive calcining of magnesium sulfate |
| US4781903A (en) * | 1985-09-13 | 1988-11-01 | Institut Francais Du Petrole | Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with elemental sulfur |
| US4855117A (en) * | 1985-09-13 | 1989-08-08 | Institut Francais Du Petrole | Process for removing sulfur oxides from a gas by means of an absorption mass regenerable by reaction with elemental sulfur |
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