Stave cooler

Abstract

A stave cooler used for cooling a furnace wall of a metallurgical furnace such as a blast furnace, having a structure in which cooling pipes to cool a metal base are cast on the side opposite the furnace interior side of the metal base and a heat resistant steel plate having openings or a lamination of heat resistant steel plates having openings is cast, in a prescribed thickness, in the furnace interior side surface of the metal base. It is acceptable to form the lamination suitably into a rectangular parallelepiped and cast it, in a plurality, in the furnace interior side of the metal base. The wear rate of the furnace interior side surface of the stave cooler is small, and its structure prevents the heat resistant steel plate(s) from falling out by thermal expansion of the stave cooler proper or wearing locally.

Description

technical field [0001] The present invention relates to a plate cooler for cooling a furnace body by being attached to the furnace wall of a metallurgical furnace such as a blast furnace, an electric arc furnace or the like. Background technique [0002] Plate coolers as furnace wall cooling units of metallurgical furnaces such as blast furnaces, electric arc furnaces, etc. are subject to wear or cracks due to continuous use. When the plate cooler is subjected to such wear or cracks, its cooling capacity is reduced, the heat load on the furnace shell increases, and the increased heat load causes cracks in the furnace shell. [0003] Generally speaking, plate coolers are constructed in the following way, as Figure 7 As shown, the cooling tubes 2 are embedded by casting in the plate cooler base metal (usually ductile iron) which forms the plate cooler body 1 on the opposite side from the inside of the furnace, and refractory bricks 9 as refractory material Is integrally cast...

AI Technical Summary

Problems solved by technology

Therefore, the work efficiency of manufacturing is very low

[0016] In addition, since the stainless steel block having a wedge-shaped cross-sectional shape is inserted into the dovetail groove, and the mortar in between is used to adjust the gap, the support strength for the stainless steel block is low, so the stainless steel block may fall due to thermal deformation of the plate cooler

[0017] On the other hand, a stainless steel block having a quadrangular cross-sectional shape is supported only by welding on the surface, so when the welded part breaks due to the difference in thermal expansion coefficients of the stainless steel and ductile iron as the base metal, or because they are worn away by the falling of the material , the stainless steel block may fall like a wedge-shaped cross-section shaped stainless steel block

[0018] In addition, when the stainless steel block is made of rolled stainless steel material, its manufacturing cost is high

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