GB857218A - Improvements in or relating to the production of white cement - Google Patents
Improvements in or relating to the production of white cementInfo
- Publication number
- GB857218A GB857218A GB3259/59A GB325959A GB857218A GB 857218 A GB857218 A GB 857218A GB 3259/59 A GB3259/59 A GB 3259/59A GB 325959 A GB325959 A GB 325959A GB 857218 A GB857218 A GB 857218A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- hood
- bed
- gas
- hopper
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
- C04B7/4461—Grate sintering
Abstract
857,218. White cement clinker. DYCKERHOFF ZEMENTWERKE A.G., and METALLGESELLSCHAFT A.G. Jan. 29, 1959 [March 18, 1958], No. 3259/59. Class 22. White cement clinker is produced from green pellets of the raw material of particle size 2 to 15 mm. diameter on the moving grate of a band sintering apparatus 1 by passing the pellets successively through zones 8, 9, 12, 14, 15, 16 where the sinter bed is preheated and dried, sintered, " after treated " in a reducing atmosphere above 900‹C., cooled to below an oxidising temperature and finally cooled to atmospheric temperature, the heating and cooling being by gas. The sinter bed consists of a lower grate protecting layer 3 of inert material coarser in size then the raw material green pellets in layer 5, and a top layer 7 of preburned pellets. Under hood 8 drying is at 300‹C. to 400‹C., sintering under oxidising conditions at 1000‹C. to 1400‹C. under hood 9 and before sintering at 1400‹C. to 1460‹C. in a reducing gas under hood 12 a layer 19 of finished clinker up to 4 mm. size is placed on layer 7 by hopper 11. In the " after treatment " zone 14 reducing gases at 1050‹C. are drawn through the bed at a reduced speed and in the reducing cooling zone 15 reducing gases decreasing in temperature from 400‹C. to 200‹C, are drawn through the bed at an increased speed to reduce the temperature of the upper layer to below 500‹C. A further protective layer 20 of finished clinker is added to the bed from hopper 16 before the final cooling to 100‹C. by atmospheric air in zone 17. The coarse grate particles from layer 3 are sieved and recycled to hopper 2, the fines from layer 5 are returned to hoppers 11 and 16 and the layer 5 is separated from the finished white clinker 7 and returned to hopper 6 for refeeding. The exhaust gas from hood 9 is recycled to hood 8, gas from hood 12 to hood 15, and gases from 14 and 15 are mixed with the gas in hood 9.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE857218X | 1958-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB857218A true GB857218A (en) | 1960-12-29 |
Family
ID=6789527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3259/59A Expired GB857218A (en) | 1958-03-18 | 1959-01-29 | Improvements in or relating to the production of white cement |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB857218A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3425853A (en) * | 1961-04-07 | 1969-02-04 | Lafarge Ciments Sa | Method of manufacture of super-white cement |
GB2117371A (en) * | 1982-03-25 | 1983-10-12 | Niistromproekt Tashk Ni I Pi S | Process for producing cement clinker |
ITMI20130786A1 (en) * | 2013-05-13 | 2014-11-14 | Italcementi Spa | PROCEDURE FOR COOLING OF WHITE CLINKER AND ITS APPARATUS |
EP2803651A1 (en) * | 2013-05-13 | 2014-11-19 | ITALCEMENTI S.p.A. | Process for cooling white clinker and relative apparatus |
CN108774010A (en) * | 2018-08-10 | 2018-11-09 | 江西银杉白水泥有限公司 | A kind of white cement clinker production grate-cooler |
-
1959
- 1959-01-29 GB GB3259/59A patent/GB857218A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3425853A (en) * | 1961-04-07 | 1969-02-04 | Lafarge Ciments Sa | Method of manufacture of super-white cement |
GB2117371A (en) * | 1982-03-25 | 1983-10-12 | Niistromproekt Tashk Ni I Pi S | Process for producing cement clinker |
ITMI20130786A1 (en) * | 2013-05-13 | 2014-11-14 | Italcementi Spa | PROCEDURE FOR COOLING OF WHITE CLINKER AND ITS APPARATUS |
EP2803651A1 (en) * | 2013-05-13 | 2014-11-19 | ITALCEMENTI S.p.A. | Process for cooling white clinker and relative apparatus |
CN108774010A (en) * | 2018-08-10 | 2018-11-09 | 江西银杉白水泥有限公司 | A kind of white cement clinker production grate-cooler |
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