GB874818A - Process and apparatus for producing cement of low alkali content - Google Patents
Process and apparatus for producing cement of low alkali contentInfo
- Publication number
- GB874818A GB874818A GB35732/59A GB3573259A GB874818A GB 874818 A GB874818 A GB 874818A GB 35732/59 A GB35732/59 A GB 35732/59A GB 3573259 A GB3573259 A GB 3573259A GB 874818 A GB874818 A GB 874818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- alkali
- gases
- supplied
- grate
- 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
- C04B7/60—Methods for eliminating alkali metals or compounds thereof, e.g. from the raw materials or during the burning process; methods for eliminating other harmful components
Abstract
874,818. Cement manufacture. POLYSIUS G.m.b.H. Oct. 21, 1959 [Oct. 24, 1958], No. 35732/59. Class 22. [Also in Group XII] Low alkali content cement is produced by first drying the raw material in alkali free gases from a rotary kiln 1 and/or external gases such as hot air in a chamber 5, then heating the dried material in chamber 6 with the alkali containing waste gases from the kiln and finally calcining the material in the rotary kiln. The granular raw material from hopper 3 is fed in a thin layer by a conveyer grate 2 through the chamber 5 which is supplied with hot air from a cooler 8, then through chamber 6 which is supplied with hot gases from the kiln 1. Calcining is effected in the rotary kiln 1 and the calcined clinker is cooled on an endless belt 8 which is divided into two chambers by a movable flap 9, and supplied with cold air via pipe 12. The waste gases from chamber 6 are electrically filtered to remove alkali and dust and may be circulated to the drying chamber and/or grinding apparatus. Alkali dust is separated from the preheated granules by a sieve mounted at the discharge end of the grate 2 and the preheated chamber 6 may contain stationary or movable rakes. The separated dust is collected in a collecting chamber below the grate 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE874818X | 1958-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB874818A true GB874818A (en) | 1961-08-10 |
Family
ID=6817014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35732/59A Expired GB874818A (en) | 1958-10-24 | 1959-10-21 | Process and apparatus for producing cement of low alkali content |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB874818A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1445564A1 (en) * | 2003-02-10 | 2004-08-11 | Polysius AG | Process and installation for heat treatment of mineral raw materials |
| DE102004023686B4 (en) * | 2004-05-13 | 2009-06-25 | Dorst, Helmut, Dipl.-Ing. | Device for producing cement clinker |
-
1959
- 1959-10-21 GB GB35732/59A patent/GB874818A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1445564A1 (en) * | 2003-02-10 | 2004-08-11 | Polysius AG | Process and installation for heat treatment of mineral raw materials |
| DE102004023686B4 (en) * | 2004-05-13 | 2009-06-25 | Dorst, Helmut, Dipl.-Ing. | Device for producing cement clinker |
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