GB786500A - A method and apparatus for the production of lightweight aggregate - Google Patents
A method and apparatus for the production of lightweight aggregateInfo
- Publication number
- GB786500A GB786500A GB31902/54A GB3190254A GB786500A GB 786500 A GB786500 A GB 786500A GB 31902/54 A GB31902/54 A GB 31902/54A GB 3190254 A GB3190254 A GB 3190254A GB 786500 A GB786500 A GB 786500A
- Authority
- GB
- United Kingdom
- Prior art keywords
- kiln
- heated
- burners
- shoot
- aggregate
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
- C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
- C04B20/061—Expanding clay, perlite, vermiculite or like granular materials in rotary kilns
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
786,500. Porous compositions. SOUTHERN LIGHTWEIGHT AGGREGATE CORPORATION. Nov. 4, 1954 [July 20, 1954], No. 31902/54. Class 70. [Also in Groups XI and XII] A lightweight aggregate is prepared by passing the raw material, e.g., clay, shale, or argillaceous or non-argillaceous slate, downwardly through a rotating inclined kiln to be heated by combustion products prior to exposure near the lower end of the kiln to a short concentrated flame from burner apparatus, to cause it to expand, and passing a substantially restricted flow of secondary air over the material discharging from the kiln to prevent agglomeration of the particles of the aggregate and to produce a reducing atmosphere within the kiln. Apparatus for carrying the process into effect may comprise an inclined rotating cylindrical kiln 10, (see Group XII), heated by a pair of burners 30, 31 (see Group XI), adapted to produce a short high temperature flame within the lower end of the kiln, the combustion gases from which pass through the kiln to a stack 12. Crushed raw material is fed via a shoot 19 into the upper end of the kiln 10 to be heated to about 600‹ to 1200‹F. in a first zone extending for about 25 per cent of the length of the kiln, and to about 1700‹ to 1900‹F. in a second zone extending for about two thirds of the kiln length. The material then passes into the intense heating zone of the burners 30, 31 to be heated quickly to about 2200‹ to 2250‹F. and thereby expanded, and at the outlet end of the kiln it is cooled by the incoming combustion air and is discharged by a shoot 41. The burners 30, 31 are supplied with pulverulent coal and the ash thereof is stated to be incorporated in the outer layers of the aggregate particles and to assist in preventing agglomeration of the latter. Secondary air enters the lower end of the kiln and its flow is restricted by individually pivoted slats 92 suspended beneath a platform 40 so as to be displaceable by the material discharging through the shoot 41.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US786500XA | 1954-07-20 | 1954-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB786500A true GB786500A (en) | 1957-11-20 |
Family
ID=22145407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31902/54A Expired GB786500A (en) | 1954-07-20 | 1954-11-04 | A method and apparatus for the production of lightweight aggregate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB786500A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2150271A (en) * | 1983-11-24 | 1985-06-26 | Williamson Cliff Limited | Rotary kiln and cooler lifters |
| GB2261938A (en) * | 1991-11-29 | 1993-06-02 | Robin Anthony Kyffin | Heat treatment of expansible material to form lightweight aggregate |
| US5482458A (en) * | 1991-11-29 | 1996-01-09 | Kyffin; Robin A. | Heat treatment of expansible materials to form lightweight aggregate |
-
1954
- 1954-11-04 GB GB31902/54A patent/GB786500A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2150271A (en) * | 1983-11-24 | 1985-06-26 | Williamson Cliff Limited | Rotary kiln and cooler lifters |
| GB2261938A (en) * | 1991-11-29 | 1993-06-02 | Robin Anthony Kyffin | Heat treatment of expansible material to form lightweight aggregate |
| US5482458A (en) * | 1991-11-29 | 1996-01-09 | Kyffin; Robin A. | Heat treatment of expansible materials to form lightweight aggregate |
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