Title of Invention

A COOLING PLATE FOR SHAFT FURNACES

Abstract A cooling plate (1) for shaft furnaces, particularly blast furnaces, provided with a refractory lining, wherein the cooling plate (1) is composed of copper or a low-alloy copper alloy and is manufactured from a wrought or rolled ingot, the cooling plate having a front side (2) and a rear side (4), the cooling plate comprising grooves (3) on the front side thereof for receiving refractory material, characterized in that cooling ducts (5) on the rear side of the cooling plate, the cooling ducts being partially defined by the cooling plate and partially by sheet metal pieces (6), the cooling ducts being milled ducts in at least one of the rear side of the cooling plate and the sheet metal pieces.
Full Text

The present invention relates to cooling plates for shaft furnaces, particularly blast furnaces, provided with a refractory lining. The cooling plates are composed of copper or a low-alloy copper alloy with cooling medium ducts, wherein the cooling plates are made from a wrought or rolled ingot, and wherein the cooling plates have on one side thereof, i.e., the front side, grooves for receiving refractory material.

Cooling plates of the above-described type are disclosed in German Patent 29 07 511. In these cooling plates, the cooling ducts are provided in the wrought or rolled ingot in the form of vertically extending blind-end bores while are produced by mechanical deep drilling. Cooling plates of this type must have a relatively great thickness to make it possible to bore the roiling ducts without impairing the stability of the cooling plates. On the front sides as well as on the rear sides of the copper material must remain in the

areas of the bores in order to ensure that the cooling plates have sufficient strength. Consequently, very thick copper plates are required which are correspondingly very expensive because of the high price of copper.
Since the cooling ducts are produced by drilling into the cooling plates, only circular holes can be made. These circular blind-end bores have only relatively small surfaces at which the required heat exchange from the cooling plates to the cooling medium can take place. Consequently, only a poor heat transfer is achieved.

SUMMARY OF THE INVENTION
Therefore, it is the primary object of the present invention to construct cooling plates of the above-described type in such a way that they are less expensive and better cooling efficiencies can be achieved.
In accordance with the present invention, cooling ducts are provided on the rear sides of the cooling plates, wherein the cooling ducts are defined in part by the cooling plate itself and in part by sheet metal or sheet steel, wherein the cooling ducts are produced by milling cutting in the rear sides of the cooling plates and/or the sheet metal or sheet steel.
The configuration according to the present invention makes it possible to use substantially thinner cooling plates because it is only necessary to provide one web of suitable thickness between the front side and the cooling duct. The second part of the cooling duct can be formed by other material, such as steel, which may have a much smaller thickness.
Since the cooling ducts are produced by milling the cooling places, any desired cross-sectional shapes and patterns of the

cooling ducts may be realized. It is not necessary, as is the case in blind-end bores, to produce always straight ducts. This makes it possible to place the cooling ducts at any desired location of the cooling plates, so that the cooling plates can be cooled more uniformly.
If ducts with great widths and small depths are selected, large surface areas of the cooling plates are directly contacted by the cooling medium, so that a high heat discharge is possible
The cooling ducts provided on the cooling plate can be closed off by individual sheet metal pieces or an entire plate. It is essential that the ducts are closed off tightly, for example, by welding or screwing the sheet metal pieces or plates to the cooling plates.
It is certainly also possible to weld cooling plates constructed with the cooling ducts against a flat rear side of the cooling plate. These sheet metal pieces can be manufactured, for example, by deep-drawing or bending, so that the manufacturing costs for the cooling plates are especially low. In that case, particularly thin cooling plates can be

manufactured which, in turn, means that expensive copper can be saved.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a cross-sectional view of a cooling plate with several cooling ducts; and
Fig. 2 is a side view of a cooling plate mounted in a blast furnace.

DESCRIPTION OF THE PREFERRED EMBODIMENTS
Fig. 1 of the drawing shows a cooling plate 1 which on its front side 2 has grooves 3 which are intended for receiving refractory material.
Cooling medium ducts 5 are milled into the rear side 4 of rhe-cooling plate 1. These ducts are not milled very, deep into the rear side 4, however, they have a relatively great width. The ducts 5 are closed by sheet metal or steel pieces 6. The net metal or steel pieces 6 are welded onto the cooling plate 1.
The sheet metal or steel pieces 6 simultaneously serve to receive supply and discharge lines 7 for the cooling medium. The supply and discharge lines 7 are welded into the bores 8 of the sheet metal or steel pieces 6.
Fig. 2 shows the inner wall 9 of a blast furnace with a cooling plate 1 screwed onto the inner wall 9. In this case, the rear side 4 of the cooling plate provided with the cooling medium ducts 5 is not closed by a plurality of sheet metal or steel pieces G, but by a single plate 6'.

The invention is not limited by the embodiments described above which are presented as examples only but can be modified in various ways within the scope of protection defined by the appended ^patent claims.





We Claim:
1. A cooling plate for shaft furnaces, particularly blast furnaces, provided with a refractory lining, wherein the cooling plate is composed of copper or a low-alloy copper alloy and is manufactured from a wrought or rolled ingot, the cooling plate having a front side and a rear side, the cooling plate comprising grooves on the front side thereof for receiving refractory material, further comprising cooling ducts on the rear side of Hip cooling plate, the cooling ducts being partially defined by the cooling plate and partially by sheet metal pieces, the cooling ducts being milled ducts in at least one of the rear side of the cooling plate and the sheet metal pieces.
2. The cooling plate according to claim 1, wherein the ducts are formed by deep-drawing or bending of the sheet metal pieces.
3. The cooling plate according to claim 1, wherein the ducts have a great width.

4. The cooling plate according to claim 1, wherein the ducts have a small depth.
5. ^The cooling plate according to claim 1, wherein the net metal pieces are of steel.
6. The cooling plate according to claim 1, wherein the sheet metal pieces are of copper.
7. A cooling plate for shaft furnaces, particularly blast furnaces, provided with a refractory lining, wherein the cooling plate is composed of copper or a low-alloy copper alloy and is manufactured from a wrought or rolled ingot, the cooling plate having a front side and a rear side, the cooling plate comprising grooves on the front side thereof for receiving refractory material, further comprising cooling ducts on the rear side of the cooling plate, the cooling ducts being partially defined by the cooling plate and partially by a sheet metal plate, the cooling ducts being milled ducts in at least one of the rear side of the cooling plate and the sheet metal plate.

8. The cooling plate according to claim 1, wherein the
sheet metal pieces are at least one of welded and screwed to the
cooling plate.
9. The cooling plate according to claim 7, wherein the
plate is at least one of welded and screwed to the cooling plate.
10. A cooling plate for shaft furnaces, particularly blast furnaces substantially as described hereinabove and illustrated with reference to the accompanying drawings.


Documents:

044-mas-1999-abstract.pdf

044-mas-1999-claims filed.pdf

044-mas-1999-claims granted.pdf

044-mas-1999-correspondnece-others.pdf

044-mas-1999-correspondnece-po.pdf

044-mas-1999-description(complete)filed.pdf

044-mas-1999-description(complete)granted.pdf

044-mas-1999-drawings.pdf

044-mas-1999-form 1.pdf

044-mas-1999-form 26.pdf

044-mas-1999-form 3.pdf

044-mas-1999-form 4.pdf

044-mas-1999-form 5.pdf

abs-44-mas-1999.jpg


Patent Number 210230
Indian Patent Application Number 44/MAS/1999
PG Journal Number 50/2007
Publication Date 14-Dec-2007
Grant Date 25-Sep-2007
Date of Filing 11-Jan-1999
Name of Patentee SMS SCHLOEMANN -SIEMAG AKTIENGESELLSCHAFT
Applicant Address EDUARD-SCHLOEMANN-STRASSE 4, 40237 DUSEELDORF,
Inventors:
# Inventor's Name Inventor's Address
1 KARL-HEINZ SMIALEK AUF DER PLATTE 16, 57271, HILCHENBACK,
2 HARTMUT HILLE DURERSTRASSE 142, 47447 MOERS,
3 WERNER OTREMBA ELSTERNSTRASSE 32, 46145 OBERHAUSEN,
4 DR. PETER HEINRICH ECKESDYK 13, 47608 GELDERN,
PCT International Classification Number C 21 B 7/10
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 198 01 425.2 1998-01-16 Germany