JPH04259315A - Method for sealing joint part in water cooled metallic material for blast furnace - Google Patents

Abstract

PURPOSE:To prevent leakage of castable refractory pressed between back face of a water cooled metallic material and an iron shell of a blast furnace by sealing joint part between the mutual water cooled metallic materials. CONSTITUTION:Cylindrical gauzes 2 having a little larger in outer diameter than in width of the joint part are bound to V-shaped studs 3 set at upper face and one side of the side faces of the water cooled metallic material 1 with wire, etc., and deformed as elliptic-state in the joint part and stuck to the side face of the water cooled metallic material 1, and then, the castable refractory is sprayed on the cylindrical gauzes 2 from inside of the furnace through a nozzle and stuck to the cylindrical gauzes 2 to seal mutually the joint part between the water cooled metallic materials. Interruption of pressing-in work caused by leakage of the pressed-in castable refractory is eliminated, and at the time of executing repairing work for blast furnace wall, blast stopping term in the blast furnace is shortened and the whole efficiency of iron-making plant is improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing joints between water-cooled hardware when installing water-cooled hardware during blast furnace construction, renovation, and blast furnace wall repair work during wind shutdown.

0002

[Prior Art] Conventionally, a castable is press-fitted into the back of water-cooled hardware to prevent the high temperature inside the blast furnace from being conducted to the blast furnace shell 7 (see FIG. 5). A seal metal fitting 8 is attached to the joint 4 between the water-cooled metal fittings 1 to prevent the castable from leaking from the joint 4 during press-fitting. In addition, as shown in FIG. 5, before attaching the water-cooled hardware 1 to the inner surface of the blast furnace, a sealing hardware 8 is fixed to the inner surface of the blast furnace of the water-cooling hardware 1 by welding 9, and a packing material 10 such as foamed polyethylene is attached to the back of the sealing hardware 8. This increased adhesion and prevented leakage of the castable.

0003

[Problems to be Solved by the Invention] In the conventional method, when transporting water-cooled hardware or attaching it to the inner surface of a blast furnace, the pre-attached sealing hardware may be deformed due to contact with other objects, etc. Due to errors, the packing material does not adhere to the surface of the adjacent water-cooled hardware, making it impossible to ensure the sealing properties of the joints, and the press-fitted castables leak from the joints. In addition, during blast furnace wall repair work when the blast furnace is closed, workers cannot enter the blast furnace, so there is a drawback that work to stop leaks cannot be done. SUMMARY OF THE INVENTION An object of the present invention is to provide a joint sealing method that prevents leakage with a 100% probability and does not require work to stop leakage, in order to solve the above-mentioned drawbacks.

0004

[Means for Solving the Problems] The present invention involves winding a wire mesh into a cylindrical shape and attaching it with wires to studs previously provided on the side and top surfaces of a water-cooled hardware, and when installing the water-cooled hardware on the inner surface of a blast furnace.
The wire mesh is brought into close contact with the side and bottom surfaces of the adjacent water-cooled hardware,
The joints between the water-cooled hardware are filled with a cylindrical wire mesh, the sprayed castable is attached to the wire mesh, the vertical and horizontal joints of the water-cooled hardware are closed, and the leakage of the castables press-fitted into the back of the water-cooled hardware is prevented. This is a joint sealing method for water-cooled metal fittings for blast furnaces.

[0005]

[Effect] The cylindrical outer diameter of the wire mesh is made slightly larger than the joint width between water-cooled hardware, so that when a water-cooled hardware is adjacent to an adjacent water-cooled hardware,
Because the cylindrical outer diameter of the wire mesh is slightly larger than the joint width, the wire mesh is deformed, and the cross section of the wire mesh becomes elliptical, and as it attempts to restore itself to a cylinder, the wire mesh can be tightly attached to the side of the adjacent water-cooled hardware, and the wire mesh can be castable. When sprayed, castable easily adheres to the mesh of wire mesh, filling the mesh and sealing joints.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for sealing joints in water-cooled hardware according to the present invention will be explained below based on the embodiments shown in FIGS. 1, 2, and 3. For example, several V-shaped studs 3 are installed in advance on the top surface and one side of the water-cooled hardware 1 as shown in FIG. and place them on the top and one side of the water-cooled hardware 1 in advance, as shown in FIG. When the water-cooled hardware 1 is installed, if the outer diameter of the cylindrical wire mesh 2 is made slightly larger than the width of the joint 4, the cylindrical wire mesh 2 deforms into an elliptical shape within the joint 4, as shown in FIG. It comes into close contact with the side surface of the adjacent water-cooled hardware 1. After all the water-cooled hardware has been installed, insert the nozzle 12 or castable spraying machine into the furnace from outside the furnace, spray castable onto the joints 4 as shown in Fig. 3, attach castable 5 to the cylindrical wire mesh 2, and spray castable into the furnace. After 5 has hardened, water-cooled hardware 1 and blast furnace shell 7
Since the castable 6 is press-fitted from the press-fit hole 11 between the two, the castable 6 does not leak from the joint 4, and a reliable seal can be achieved.

[0007]

Effects of the Invention: The joint sealing method for water-cooled hardware of the present invention makes it possible to seal the joints between water-cooled hardware with a 100% probability, and prevents interruptions in press-fitting work due to leakage of castables press-fitted into the back of water-cooled hardware. Because it can be eliminated,
It can shorten work time and improve joint quality. Therefore, especially during blast furnace wall repair work, the blast furnace downtime period can be shortened and the overall efficiency of the steelworks can be improved.

[0008]

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the joint sealing method of the present invention;

[Figure 2
] A sectional view showing the joint sealing method of the present invention,

[Figure 3]
A sectional view showing the steps of the joint sealing method of the present invention,

FIG. 4 is an elevational view showing a conventional joint sealing method;

FIG. 5 is a perspective view showing a conventional joint sealing method.

[Explanation of symbols]

1 Water-cooled hardware 2 Cylindrical wire mesh 3 V-shaped stud 4 Joints 5 Castable 6 Castable 7 Blast furnace skin 8　Seal hardware 9. Welding 10 Packing material 11 Press-fit hole 12 Nozzle.

Claims (1)

[Claims] Claim 1: A wire mesh is wound into a cylindrical shape and attached with wire to studs provided in advance on the side and top surfaces of the water-cooled hardware, and when the water-cooled hardware is attached to the inner surface of the blast furnace, the wire mesh is tightly attached to the side and bottom surfaces of the adjacent water-cooled hardware. The method is characterized in that the joints between the water-cooled hardware are filled with a cylindrical wire mesh, and the sprayed castable is attached to the wire mesh to close the vertical and horizontal joints of the water-cooled hardware to prevent leakage of the castable that is press-fitted into the back of the water-cooled hardware. A joint sealing method for water-cooled metal fittings for blast furnaces.