Device for fixing and sealing stave plates for a blast furnace

• US 4,336,925 A
• Filed: 06/05/1980
• Issued: 06/29/1982
• Est. Priority Date: 06/06/1979
• Status: Expired due to Term

• Current Assignee: Technilor, Usinor
• Original Assignee: Technilor, Usinor
• Inventors: Cordier, Jean A., Rollot, Pierre H., Briche, Raymond L.
• Primary Examiner(s): Peters, G. O.
• Application Number:
  US06/156,623
• Time in Patent Office: 754 Days
• Field of Search: 266/190, 266/193, 266/194, 122/6 A, 122/6 B
• US Class Current: 266/193
• CPC Class Codes: C21B 7/10 Cooling; Devices therefor

Abstract

The device permits the fixing of a stave plate to the armour shell of the blast furnace by means of a washer and a cup-shaped ring which are welded externally both to the shell and to protecting sleeves for inner water circulating tubes which are extended to outside the shell.

The sealing is achieved by the interposition under compression of a preformed flexible apertured rectangular joint element and a preformed circular joint element of silicone elastomer or like plastics material, between the shell and the stave plate with adhesion on the bearing faces. It is completed by an injected mass and an annular joint element between the water circulating tubes and the corresponding protecting sleeves.

The device is completed by the provision of packing products respectively between the inner wall of the shell and the stave plates and in gaps between two adjacent stave plates.

Claims

1. In a blast furnace comprising an armour shell, stave plates disposed in superimposed rings adjacent an inner face of the shell, said stave plates each having an inner cooling fluid circulating tube which extends out of upper and lower parts of the stave plate inside respective protecting sleeves, said tubes extending through orifices provided in the shell;

the improvement wherein, for the purpose of fixing and sealing the stave plates, in said lower parts of the stave plates, the protecting sleeves are extended through the shell, and a washer is welded to each sleeve in said lower part and to the shell for fixing the sleeve, said washers welded to the sleeves constituting an assembly which both fixes the stave plates and maintains under compression between the stave plates and the inner face of the shell a continuous sealing belt, which belt comprises a juxtaposition of substantially rectangular joint elements, preformed of a silicone elastomer by molding, each of which joint elements comprises in a lower part thereof a heel which is engaged and gripped between the plate on which it is mounted and an upper part of a stave plate located immediately therebelow each of which joint elements substantially fits the shape of said lower part of the corresponding stave plate and defines an aperture for the passage of a corresponding sleeve and, in said upper parts of the stave plates, the sleeves are also extended out of the shell and a cup-shaped ring is welded both to each sleeve in said upper part and to the shell and forms an assembly which constitutes means both for fixing the stave plates to the shell and for maintaining under compression between the stave plates and the inner face of the shell substantially circular flat joint elements each of which joint elements surrounds a corresponding sleeve of said upper part of the stave plates.

2. The blast furnace claimed in claim 1, wherein the substantially rectangular joint elements have hollow bodies embedded in their mass in the course of the molding thereof.

3. The blast furnace claimed in claim 1, or 2, further comprising, in the region of an end portion of each sleeve outside the shell, a fixed abutment rigid with the corresponding tube, an annular joint element surrounding the tube and compressed between an end edge of the sleeve and the fixed abutment, an annular asbestos gasket interposed between the sleeve and the tube, and a flexible material in an injected state between the tube and the sleeve therefor and between said asbestos gasket and the annular joint element.

4. The blast furnace claimed in claim 1, or 2, comprising packing products interposed respectively between the inner face of the shell and the stave plates and in gaps between immediately adjacent stave plates.

5. The blast furnace claimed in claim 4, wherein said packing products between the inner face of the shell and the stave plates comprise a flexible refractory concrete based on magnesium oxide which resists CO.

6. The blast furnace claimed in claim 4, wherein said packing products in the gaps between adjacent stave plates comprise a fluidtight fibrous cement of refractory fibers in a ceramic binder.