GB2231392A - Hanger brick for lining a furnace - Google Patents
Hanger brick for lining a furnace Download PDFInfo
- Publication number
- GB2231392A GB2231392A GB9010572A GB9010572A GB2231392A GB 2231392 A GB2231392 A GB 2231392A GB 9010572 A GB9010572 A GB 9010572A GB 9010572 A GB9010572 A GB 9010572A GB 2231392 A GB2231392 A GB 2231392A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mounting body
- hanger brick
- brick
- hanger
- suspending element
- 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.)
- Withdrawn
Links
- 239000011449 brick Substances 0.000 title claims description 57
- 239000000835 fiber Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 229910010293 ceramic material Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000011214 refractory ceramic Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/14—Supports for linings
- F27D1/145—Assembling elements
- F27D1/147—Assembling elements for bricks
- F27D1/148—Means to suspend bricks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
1 1 HANGER BRICK FOR LINING A FURNACE The invention relates to a hanger
brick for lining a furnace of the type substantially comprising refractory. ceramic material to which a suspending element, which may be connected to a carrier device of the furnace, may be secured.
Such a hanger brick is described in DE-A-2713658. The brick comprises two different refractory compositions. The first composition is a refractory concrete with a high resistance to changes in temperature. The second composition is a refractory concrete which has sufficient strength to transmit forces, e.g. due to the weight of the brick, between the suspending element and the hanger brick. In manufacture, the suspending element is pressed into the second composition before it has set. After solidification of the composition the suspending element can be screwed out of it.
A two-layer composite block is described in DE-A-2057877 which has a heatresistant layer, for instance of ceramic fibres, and a heat-insulating layer, for instance- of mineral fibres. In order to secure the composite, block, an anchor is provided which may be inserted from the heatresistant layer into a preformed opening in the composite block. The anchor may be connected by means of a suspending element, for instance a wire, to the carrier device of the firing furnace. The interruption of the heat-resistant layer of the composite block caused by the anchor is undesirable. Furthermore, there is a risk that the anchor may be lost.
2 In DE-B-1558095, the suspending elements are carrier plates having teeth which engage the lateral surface of the hanger bricks. A disadvantage of this arrangement is that the bricks are damaged.
Further hanger bricks are described in the publication: "Stand der Technik, Darstellung aus einzelnen Gebieten, herausgegeben von Mitgliedern des Reichspatentamtes, Feuerungsdeckenj K. Harraeust Carl Heymann Verlag, Berlin 1933".
It is the object of the invention to provide a hanger brick of the type referred to above which has a relatively low weight, high thermal resistance, good thermal insulation properties and to which the suspending element may be firmly secured, but does not have a multi-layer construction.
According to the present invention there is provided a hanger brick for lining a furnace, the brick substantially comprising refractory ceramic fibre material and having a mounting body irremovably embedded therein, the"mounting body including means for securing a suspending, element thereto whereby, in use, a suspending element is secured to the mounting body and connected to a carrier device of the furnace.
Due to the low bulk density of the ceramic f ibre material, e.g. about 300 to 700 kg/m3, the hanger brick has a comparatively low weight. This weight is even lower than that of so-called refractory light bricks which have a bulk density of e.g. about 800 to 1300 1 \1 3 kg/M3. The low weight has the advantage that the carrier device of the furnace to which the brick is to be attached can be constructed to bear only a relatively light load. with corresponding savings.
Due to the use of ceramic fibre materialf the hanger brick has a high heat resistancer a high resistance to changes in temperature and good heat insulation properties.
A conventional suspending element of wire type cannot normally be secured to a hanger brick of ceramic fibre material since the structure of the fibre material is not sufficiently strong to anchor such a suspending element. The mounting body,, which has a relatively large surface area and is embedded in a form-locking manner in the fibre material, is of more stable,, tougher, construction than the hanger brick. The mounting body can thus transmit the weight to a conventional wire suspending element without being ripped out of the brick.
Due to the fact that the mounting body and the suspending element are separate components,, the suspending element 9ttached to the carrier device of the firing furnace can be reused after replacing the hanger brick.
The mounting body is irremovably retained in thehanger brick. The use of this type of mounting body makes it unnecessary to have an opening in the surface of the brick directed towards the interior of the furnace.
%I-- 4 In a preferred embodiment of the invention the mounting body is substantially of ceramic material whose bulk density is substantially higher than the bulk density of the hanger brick. The use of refractory, ceramic material for the mounting body is desirable since the mounting body is then also resistant to high thermal stresses. These occur, for instance, when the hanger brick is fired after being moulded in a vacuumsuction process together with the embedded mounting body or bodies. Due to this firing, shrinkage in subsequent use is prevented. Due to the shrinkage of the ceramic material on the firing, the mounting body is tightly embedded in the fibre material. Since the mounting body is separate from the suspending element, the suspending element does not need to be subjected to the firing process. Its heat resistance thus needs to be matched only to those temperatures to which the side of the hanger brick which, in use, is remote from the interior of the furnace is subjected.
In one embodiment of the invention the mounting body has an opening to receive the suspending element which is exposed at a surface of the hanger brick. The installatio n of the hanger brick us thus simplified since the point to which a suspending element is to be secured may be easily identified. The means for securing a suspending element preferably includes an opening, particularly a threaded opening, in the mounting body for receiving a suspending element which is exposed at a surface of the hanger brick. Alternatively the connection between the mounting body and the suspending element may be of bayonet or split pin type.
The invention also embraces such a hanger brick to which a suspending element is secured and a furnace whose roof is lined with such hanger bricks.
Further features and advantages will be apparent from the following description of a specific embodiment of the invention, given by way of example with reference to the single accompanying drawing which is a perspective view of a hanger brick in accordance with the invention for lining a firing furnace.
A parallelopipedal hanger brick 1 of stable, regular shape comprises refractory, ceramic fibre material. It has a bulk density in the region of 250 kg/m3, or more.
Embedded in the hanger brick 1 in a form-locking manner is a mounting body 2 embedded in such a way that it cannot be removed from the hanger brick without destroying the hanger brick.
The mounting body 2 is prefabricated from a ceramic material. Its bulk, density is substantially larger 3 than that of the hanger bricki for example, 4000 kg/m The mounting body 2 has a frusto-conical section 3 whose smaller end face 4 is in registry with the upper surface 5 of the hanger brick 1. At the larger end of the frusto-conical section 3 is an annular flange 6. The conical surface 7 of the frusto-conical section 3 and the annular flange 6 bear the weight of the hanger brick 1 acting in the direction G. Thus the load is spread over a relatively large surface on the mounting 6 body.
Provided in the end f ace of the mounting body 2 is a threaded bore, which is not shown. Releasably screwed into it is a suspending element 8. The suspending element 8 consists of a piece of metal wire which at one end has an external screw thread, not shown, corresponding to the threaded bore in the mounting body 2. An eye 9 is formed at the other end of the suspending element 8 by bending it. The suspending element 8 and thus the hanger brick 1 are, in use. suspended by means of the eye 9 from a carrier device attached to a furnace. The carrier device is not shown.
Other releasable connections can also be employed between the mounting body 2 and the suspending element 8 instead of the threaded connection.
The hanger brick 1 may be manufactured in a vacuumsuction process. The mounting body 2 is inserted in the fibre material composition whilst it is still liquid. Subsequently. the composition is dried and sets in the desired shape. The hanger brick 1 is then fired, which substafttially prevents shrinkage of the hanger brick 1 in use and secures the mounting body 2 in the fibre material. The hanger brick 1 is then brought to its desired dimensions by machining. A ceramic bonder is finally applied to the hanger brick 1 which hardens its surfaces.
i 7
Claims (10)
1. A hanger brick for lining a furnacer the brick substantially comprising refractory ceramic fibre material and having a mounting body irremovably embedded therein, the mounting body including means for securing a suspending element thereto whereby, in user a suspending element is secured to the mounting body and connected to a carrier device of the furnace.
2. A hanger brick as claimed in claim 1, wherein the mounting body is substantially of ceramic material.
3. A hanger brick as claimed in claim 1 or 2, wherein the bulk density of the mounting body is substantially higher than the bulk density of the hanger brick.
4. A hanger brick as claimed in any one of the preceding claims, wherein the means for securing a suspending element includes an opening in the mounting body which is exposed at a surface of the hanger brick.
5. A hanger brick as claimed in claim 4, wherein the opening in the mounting body is screw threaded.
6. A hanger brick as claimed in one of the preceding claims, wherein the mounting body is frusto-conically shaped and its smaller end face is in registry with a surface of the hanger brick.
7. A hanger brick as claimed in one of the preceding claims, wherein the mounting body has an outwardly extending annular flange within the fibre material.
7,
8 8. A hanger brick substantially as herein specifically described with reference to the accompanying drawing.
9. A hanger brick as claimed in any one of the preceding claims including a suspending element secured to the mounting body.
c
10. A furnace including a roof lined with hanger bricks as claimed in claim 9, each suspending element being secured to a respective carrier device of the furnace.
t Published 1990 atThe Patent Office. State House. 6671 High Holborn. London WC1R 4TP. Further copies maybe obtainedfromThe Patent Office. Stiles Branch, St Mary Cray, Orpington. Kent BR5 3RD. Printed by Multiplex techniques ltd, St Maxy Cray, Kent, Con. 1187
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3915703A DE3915703A1 (en) | 1989-05-13 | 1989-05-13 | HANGING STONE FOR LINING A FURNACE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9010572D0 GB9010572D0 (en) | 1990-07-04 |
| GB2231392A true GB2231392A (en) | 1990-11-14 |
Family
ID=6380631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9010572A Withdrawn GB2231392A (en) | 1989-05-13 | 1990-05-11 | Hanger brick for lining a furnace |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE3915703A1 (en) |
| FR (1) | FR2646895A1 (en) |
| GB (1) | GB2231392A (en) |
| IT (1) | IT9047925A1 (en) |
| YU (1) | YU67590A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1548975A (en) * | 1975-09-03 | 1979-07-18 | Produits Refractaires | Assembly element consisting of refracotry metrials |
| GB2040415A (en) * | 1979-01-11 | 1980-08-28 | Morgan Refractories Ltd | Improvements in refractory lining units |
| GB2046417A (en) * | 1979-04-09 | 1980-11-12 | Gen Signal Corp | Industrial furnace with ceramic insulating modules having internal grid support |
| US4580974A (en) * | 1985-04-05 | 1986-04-08 | Kaiser Aluminum & Chemical Corporation | Melting furnace cover |
| EP0327821A1 (en) * | 1988-02-06 | 1989-08-16 | Abicht, Roland, Ing. grad. | Securing device for parts and/or mats made from ceramic fibre materials for use in an industrial furnace |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3568611A (en) * | 1968-11-12 | 1971-03-09 | Johns Manville | Furnace construction |
| DD206313A3 (en) * | 1981-09-24 | 1984-01-18 | Inst Zement | FIRE-RESISTANT PORCELAIN ANCHOR WITH HOLDING ARMATURE |
-
1989
- 1989-05-13 DE DE3915703A patent/DE3915703A1/en not_active Ceased
-
1990
- 1990-04-06 YU YU00675/90A patent/YU67590A/en unknown
- 1990-05-08 IT IT047925A patent/IT9047925A1/en not_active Application Discontinuation
- 1990-05-09 FR FR9005760A patent/FR2646895A1/en active Pending
- 1990-05-11 GB GB9010572A patent/GB2231392A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1548975A (en) * | 1975-09-03 | 1979-07-18 | Produits Refractaires | Assembly element consisting of refracotry metrials |
| GB2040415A (en) * | 1979-01-11 | 1980-08-28 | Morgan Refractories Ltd | Improvements in refractory lining units |
| GB2046417A (en) * | 1979-04-09 | 1980-11-12 | Gen Signal Corp | Industrial furnace with ceramic insulating modules having internal grid support |
| US4580974A (en) * | 1985-04-05 | 1986-04-08 | Kaiser Aluminum & Chemical Corporation | Melting furnace cover |
| EP0327821A1 (en) * | 1988-02-06 | 1989-08-16 | Abicht, Roland, Ing. grad. | Securing device for parts and/or mats made from ceramic fibre materials for use in an industrial furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9010572D0 (en) | 1990-07-04 |
| IT9047925A0 (en) | 1990-05-08 |
| YU67590A (en) | 1991-08-31 |
| FR2646895A1 (en) | 1990-11-16 |
| IT9047925A1 (en) | 1991-11-08 |
| DE3915703A1 (en) | 1990-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |