Metallurgical apparatus – Means for treating ores or for extracting metals – By means applying heat to work – e.g. – furnace
Patent
1983-06-27
1987-06-30
Rutledge, L. Dewayne
Metallurgical apparatus
Means for treating ores or for extracting metals
By means applying heat to work, e.g., furnace
266193, C21B 710
Patent
active
046764879
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to ferrous metallurgy, and particularly to cooling plates for metallurgical furnaces.
The invention may prove most advantageous in cooling metallurgical furnaces, and particularly blast furnaces.
DESCRIPTION OF THE PRIOR ART
Known in the art is a cooling plate for metallurgical furnaces (Polish Patent Specification No. 65,896), comprising a metallic plate proper provided with openings filled with a refractory material, and a cooling pipe built thereinto.
More specifically, the cooling plate comprises a metallic plate provided with ribs or tie-plates disposed at a right angle to the surface thereof and forming blind openings or pockets, the metallic plate proper serving as a bottom portion thereof, while their open portions form a front side facing the furnace chamber. The openings are filled with firebricks.
During operation of the cooling plate of the above construction, there occur thermal stresses in the ribs of tie-plates forming blind openings, said stresses being caused by thermal expansion of the firebricks. Since the above tie-plates are disposed parallel to one another, during the operation of the cooling plate of such a design, bricks crack and fall out, thereby resulting in the formation of a non-uniform thermal field in the body of the metallic plate proper, and in premature damaging thereof. In other words, the service life of such cooling plates is limited.
SUMMARY OF THE INVENTION
The invention resides in a cooling plate for metallurgical furnaces, wherein, due to equalizing the temperature (thermal) field through the metallic portion thereof, the rate of heat removal is increased and thermal stresses in the metallic portion of the plate are decreased, thereby increasing the service life of the cooling plate.
The object set forth is attained in a cooling plate for metallurgical furnaces, comprising a metallic plate proper provided with openings filled with a refractory material, and a cooling pipe built thereinto. According to the invention said openings extend horizontally through the plate thickness so that the metallic plate is S-shaped, said openings having the form of a trapezium in the vertical plane, and the cooling pipe follows the configuration of said metallic plate.
During the operation of such a cooling plate, due to the fact that in the metallic plate proper the openings extend horizontally through the plate thickness so that the metallic plate is S-shaped, there is ensured uniform and intensive cooling of the metallic portion thereof. Since in the vertical plane the openings have the form of a trapezium, if the plate is mounted so that the trapezium is directed with the smaller base thereof into the furnace chamber, openings are held therewithin even after the damage of the lining, the firebricks in said. Since the cooling pipe follows, the configuration of the metallic plate proper, during the operation of the inventive structure, the intensity of heat removal in this metallic plate proper is increased, thermal stresses are reduced, wear resistance of the cooling plate is improved, and consequently the service life thereof is prolonged.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is further explained in terms of a specific example of an embodiment thereof with reference to the accompanying drawings, in which:
FIG. 1 is a rear view of a cooling plate of the invention, and
FIG. 2 is a sectional view of a cooling plate of the invention along the line 2--2 in FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
A cooling plate comprises a metallic plate 1 proper having, for mounting considerations, a vertical side a and a horizontal side b. The metallic plate 1 may be constructed from such ferrous alloys as cast iron and steel, and from such alloys of non-ferrous metals as copper, bronze, etc. Openings 2 are made through the thickness of the plate 1 and horizontally extending. As can be seen in FIG. 1, the openings 2 do not cover the whole width of the plate 1. As a result, the metallic plate 1 is S-shaped. In the vert
REFERENCES:
patent: 3379427 (1968-04-01), Zherebin et al.
S. M. Andonjev et al. "Okhlazdenie domennykhpechey," 1972, Mettallurgia (Moskva), p. 217.
Ioshpa Vladimir G.
Kudinov Gennady A.
Lysenko Evgeny E.
Nekrasov Ignaty N.
Shokul Anatoly A.
Kastler S.
Rutledge L. Dewayne
Vnipichermetenergoochistka
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