Kaldo stack repair panel

Abstract

The utility model discloses a kaldo furnace smoke hood repair plate relates to metal smelting equipment field, including the shell that the appearance is suitable for the upper half body of smoke hood, and the inner wall of shell is provided with ramming material layer, can improve the service life after single maintenance while reducing the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting equipment, specifically a repair plate for a Kaldor furnace fume hood. Background Technology

[0002] A Kaldor furnace is a type of equipment used for metal smelting. It mainly consists of a furnace body, transmission system, lance system, fume hood, and flue. The fume hood, as a crucial component in the Kaldor furnace used to collect the furnace gases generated during the smelting process, directly affects the overall operational stability of the equipment. Specifically, for example... Figure 1 As shown, the fume hood A has an overall trumpet-shaped structure. Its lower end is connected to the furnace opening of the furnace body, and its upper end is connected to the flue B to form a circulation channel for the furnace gas to be discharged from the furnace. In terms of material and specifications, existing fume hoods are usually made of Q245R steel, and the steel plate thickness is designed to be 8mm to meet the structural support and high temperature resistance requirements of the foundation.

[0003] In the actual smelting operation of the Kaldor furnace, the fume hood A needs to be continuously exposed to the high-temperature environment and corrosive flue gas generated by smelting. Under this condition for a long time, the upper part of the pipe wall of the inclined fume hood A ( Figure 1 The tube wall on the upper left side of the core wire in the tube is subjected to the scouring of high-temperature flue gas, and the burning and corrosion phenomena are more prominent, which seriously shortens the service life of the fume hood and affects the operation of the equipment.

[0004] Currently, the common repair method for burnt sections of fume hoods is to weld and patch them with steel fiber rammed earth. However, this method has the following drawbacks: the entire repair process requires furnace shutdown; due to the tight repair schedule, the rammed earth covering the damaged areas of the fume hood may not dry properly, has poor density, and the rammed earth layer may be uneven in thickness, causing burnt sections to reappear in less than a month after repair. Furthermore, frequent repairs of fume hoods using rammed earth will severely impact production efficiency; replacing the entire fume hood would not only require high equipment purchase and disassembly / reassembly labor costs but would also reduce equipment production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a repair plate for a Kaldor furnace hood, which reduces maintenance costs and improves maintenance efficiency.

[0006] This utility model can be achieved through the following technical solution: a Kaldor furnace hood repair plate, comprising a shell whose shape is adapted to the upper half of the hood, and a ramming material layer is provided on the inner wall of the shell.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] Since the shell and ramming material layer are prepared in advance, there are no problems with poor drying and uneven thickness of the ramming material that occur with temporary preparation. The service life of the repaired fume hood is significantly improved. Moreover, the repair process only involves cutting off the burned parts and welding the repair plate. The repair time is short, reducing the Kaldo furnace downtime and minimizing the impact of Kaldo furnace downtime on production. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a fume hood and flue in the prior art;

[0010] Figure 2 , 3 This is a three-dimensional structural diagram of the repair plate in this utility model;

[0011] Figure 4 This is a partial cross-sectional structural diagram of the repair plate in this utility model;

[0012] Figure 5 This is a schematic diagram of the U-shaped frame in this utility model;

[0013] Figure 6 This is a schematic diagram of the two U-shaped frames in the orthogonal state in this utility model. Detailed Implementation

[0014] Please see Figure 1-6 As shown, a Kaldor furnace hood repair plate includes a shell 10 whose shape is adapted to the upper half of the hood A, and a ramming material layer 20 is provided on the inner wall of the shell 10. When the upper half of the hood A is burned, the entire upper half of the hood A is cut off, and then the shell 10 is welded to the cut-off position of the hood A to repair the hood A. Since the shell 10 and the ramming material layer 20 are prepared in advance, there are no problems such as insufficient drying and uneven thickness of the ramming material that occur when prepared on-site. The service life of the repaired hood A is significantly improved. Moreover, the repair process only involves the steps of cutting off the burned part and welding the repair plate, which shortens the repair time, reduces the downtime of the Kaldor furnace, and reduces the impact of the Kaldor furnace downtime on production.

[0015] Furthermore, a U-shaped frame 21 is provided inside the ramming material layer 20. The frame surface of the U-shaped frame 21 is perpendicular to the inner wall of the shell 10, and the free ends of the two arms of the U-shaped frame 21 are welded to the inner wall of the shell 10. The U-shaped frame 21 is made of 310 stainless steel and is used to increase the strength of the ramming material layer 20.

[0016] The free ends of the two arms of the U-shaped frame 21 are provided with mutually spaced claws 211, which are welded to the inner wall of the housing 10. The two claws 211 can extend in opposite directions, and the surfaces of the two claws 211 can be perpendicular to or coplanar with the frame surface of the U-shaped frame 21. The former provides stronger support for the frame surface of the U-shaped frame 21. By providing claws 211, the welding area between the U-shaped frame 21 and the inner wall of the housing 10 is increased, and welding operations are also more convenient.

[0017] The U-shaped frames 21 are arranged orthogonally in pairs. The orthogonal arrangement of the two U-shaped frames 21 makes reasonable use of the space inside the ramming material layer 20. At the same time, the U-shaped frames 21 also support each other, which makes the structure strong and further increases the strength of the ramming material layer 20 and improves the service life of the ramming material layer 20.

[0018] The edges of the ramming material layer 20 are spaced apart from the edges of the shell 10. This arrangement allows the shell 10 to be cut into a repair plate of the corresponding shape and size according to the size of the burned part after the burnt part of the fume hood A is cut off, and then aligned and welded with the cut-off part of the fume hood A.

[0019] In this application, the outer shell 10 is made of 310 stainless steel with a steel plate thickness of 12mm, the tamping material layer 20 has a thickness of 10cm, and the raw material of the tamping material layer 20 is steel fiber tamping material.

Claims

1. A repair plate for a Kaldor furnace hood, characterized in that: It includes a shell (10) whose shape is adapted to the upper half of the fume hood (A), and the inner wall of the shell (10) is provided with a ramming material layer (20).

2. The Kaldor furnace hood repair plate according to claim 1, characterized in that: A U-shaped frame (21) is provided inside the ramming material layer (20). The frame surface of the U-shaped frame (21) is perpendicular to the inner wall of the shell (10). The free ends of the two arms of the U-shaped frame (21) are welded to the inner wall of the shell (10).

3. The Kaldor furnace hood repair plate according to claim 2, characterized in that: The free ends of the two arms of the U-shaped frame (21) are provided with claws (211) that are far apart from each other, and the claws (211) are welded to the inner wall of the shell (10).

4. The Kaldor furnace hood repair plate according to claim 3, characterized in that: The U-shaped frames (21) are arranged orthogonally in pairs.

5. The Kaldor furnace hood repair plate according to claim 1, characterized in that: The distance between each edge of the ramming material layer (20) and each edge of the shell (10) is arranged.

Images