GB407941A - Improvements relating to the manufacture of cement by the wet process - Google Patents
Improvements relating to the manufacture of cement by the wet processInfo
- Publication number
- GB407941A GB407941A GB2658432A GB2658432A GB407941A GB 407941 A GB407941 A GB 407941A GB 2658432 A GB2658432 A GB 2658432A GB 2658432 A GB2658432 A GB 2658432A GB 407941 A GB407941 A GB 407941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bed
- slurry
- hot gases
- grate
- kiln
- 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
- 239000004568 cement Substances 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 239000007789 gas Substances 0.000 abstract 8
- 239000002002 slurry Substances 0.000 abstract 6
- 239000000463 material Substances 0.000 abstract 5
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000011148 porous material Substances 0.000 abstract 2
- 239000000779 smoke Substances 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 230000001427 coherent effect Effects 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/2016—Arrangements of preheating devices for the charge
- F27B7/2066—Arrangements of preheating devices for the charge comprising a band transporter
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
407,941. Rotary cement kilns. NIELSEN, N., 44, Fuglebakkevej, Frederiksberg, near Copenhagen. Sept. 24, 1932, No. 26584. [Class 51 (ii).] Preheating charges.-In the manufacture of cement by the wet process, the raw slurry material is, without being nodulized, formed into a coherent layer on a gas permeable bed. For this purpose it is subjected to a preliminary heating process sufficient to cause it to become porous as a result of the formation of cracks and pores. Hot gases are then passed through the layer which is thereafter fed, without further grinding, into a kiln. A mechanical device, such as a spiked roller may be used to assist the formation of pores and cracks. When the slurry is applied to the bed in liquid form the preliminary heating may be effected by passing hot gases upwards through the bed so that they bubble through the layer of slurry. Alternatively the hot gases may be led along the surface of the slurry while the openings in the bed are kept shut by dampers or the like. In this case the slurry may be partially dewatered, or stiffened by the addition of dry material. The gas permeable bed is preferably movable and may consist of a chain grate, a rotating perforated table or cylinder of metal which may be a heat resisting alloy or covered with perforated refractory material. The hot gases are arranged to pass first through the material and then through the bed so that the bed is not exposed to extremely hot gases. The same hot gases can be used subsequently for the preliminary drying. In the arrangement shown, a kiln smoke chamber 2 at the inlet end of a rotary kiln 1 contains a grate formed by an endless band 3 having hinged flaps 9 adapted to swing into the vertical position when they reach their lower position. The smoke chamber above the grate is divided into two chambers 5, 6 in the first of which the slurry material on the grate is dried and in second 6 of which the material is subsequently further heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2658432A GB407941A (en) | 1932-09-24 | 1932-09-24 | Improvements relating to the manufacture of cement by the wet process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2658432A GB407941A (en) | 1932-09-24 | 1932-09-24 | Improvements relating to the manufacture of cement by the wet process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB407941A true GB407941A (en) | 1934-03-26 |
Family
ID=10245916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2658432A Expired GB407941A (en) | 1932-09-24 | 1932-09-24 | Improvements relating to the manufacture of cement by the wet process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB407941A (en) |
-
1932
- 1932-09-24 GB GB2658432A patent/GB407941A/en not_active Expired
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