Blast furnace taphole

Abstract

The utility model discloses a blast furnace iron notch, which belongs to the technical field of iron-making blast furnace stokehole iron notches, solves the problems of short service life and serious accidents of the blast furnace iron notch, and comprises a blast furnace iron notch arranged on a furnace shell of a blast furnace body, a first frame arranged on the outer side of the blast furnace iron notch, and a second frame arranged on the inner side of the blast furnace iron notch, the centers of the first frame and the second frame are concentric with the center line of the blast furnace iron notch, the first frame and the second frame are rectangular, and a mud sleeve is arranged in the second frame. According to the utility model, various defects of the existing blast furnace iron notch are overcome, the application effects of safety, stability, simplicity, convenience, high efficiency and long service life are achieved, and terrible accidents caused by burning loss of the blast furnace iron notch and influence on long-term stable and smooth operation of the furnace condition are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of blast furnace iron mouth at blast furnace, specifically relates to a blast furnace iron mouth. BACKGROUND

[0002] Blast furnace iron mouth maintenance is one of the most important links in steel production, which is directly related to the normal operation and production efficiency of blast furnace. The iron mouth is the iron outlet of the blast furnace, and its quality directly affects the flow and stability of molten iron. Therefore, maintaining the good state of the iron mouth is of great significance for continuous production of the blast furnace. However, iron mouth maintenance faces a series of challenges, including high temperature, thermal stress, chemical corrosion and other factors, which make the iron mouth maintenance work complex and difficult. The importance of blast furnace iron mouth maintenance lies in its direct impact on the production efficiency and stability of the blast furnace.

[0003] The blast furnace iron mouth is the key position of the blast furnace iron discharge. Once the iron mouth has problems, it will lead to poor iron discharge or even production stoppage, which seriously affects the operation of the entire steel production line. Therefore, timely detection and solution of the iron mouth problem is crucial to ensure the continuous production of the blast furnace. Blast furnace iron mouth maintenance faces many challenges, including working conditions in high temperature environment. The internal temperature of the blast furnace is extremely high, and the iron mouth is even higher. The maintenance and repair work of the staff needs to be carried out in the extremely high temperature environment, which brings great difficulty and danger to the maintenance work. At the same time, the thermal expansion and thermal stress of materials in high temperature environment will also aggravate the wear and damage of the iron mouth, increasing the difficulty and complexity of the maintenance work. The iron mouth also faces the challenge of chemical corrosion and other factors. There are a large number of corrosive gases and substances in the blast furnace, such as hydrogen sulfide, oxygen, etc. These substances will cause corrosion to the materials of the iron mouth, leading to the damage and wear of the iron mouth. Therefore, in addition to the thermal stress in high temperature environment, the iron mouth also needs to resist the damage from chemical corrosion, which puts higher requirements on the maintenance of the iron mouth. In summary, the importance of blast furnace iron mouth operation is self-evident, which is directly related to the production efficiency and stability of the blast furnace. Therefore, steel enterprises need to increase investment and attention to iron mouth maintenance work, take effective measures to ensure the good state of the blast furnace iron mouth, and thus ensure the continuous production of the blast furnace.

[0004] In the normal production process of the blast furnace, the hot load of the iron notch area is large, not only withstands the scouring of high-temperature slag and iron, the extrusion of mud bubbles, but also is scoured by high-temperature gas and chemically eroded, therefore, the iron notch area is a relatively weak part of the blast furnace body. The iron notch mud sleeve is the end surface of the iron notch in contact with the mud gun, and the mud sleeve needs to be complete, and the gun head needs to be tightly matched with the mud sleeve when the opening is blocked. In the actual tapping operation, with the increase of the smelting intensity of the blast furnace, the maintenance of the iron notch and the integrity of the mud sleeve need to be further improved, if the mud sleeve is damaged due to problems, mud running, iron notch spattering, and even blast furnace wind reduction and blowing off for blocking will be caused when blocking, and a long time is consumed in the process of processing the mud sleeve, thereby affecting the normal production of the blast furnace. Practical new type content

[0005] The purpose of the present utility model is to provide a blast furnace iron notch to solve the problems of short service life of the blast furnace iron notch and occurrence of vicious accidents.

[0006] The technical scheme of the present utility model is: a blast furnace iron notch, comprising a blast furnace iron notch opened on a blast furnace body shell, a first frame is arranged outside the blast furnace iron notch, a second frame is arranged inside the blast furnace iron notch, the centers of the first frame and the second frame are concentric with the center line of the blast furnace iron notch, the first frame and the second frame are both rectangular, and a mud sleeve is arranged in the second frame.

[0007] As a further improvement of the present utility model, a cooling wall is arranged between the blast furnace iron notch and the blast furnace body, and a plurality of cooling wall water pipes are uniformly arranged on the cooling wall.

[0008] As a further improvement of the present utility model, a tuyere platform is arranged above the blast furnace iron notch, and a heat-resistant sprayed material is arranged between the tuyere platform and the top of the cooling wall.

[0009] As a further improvement of the present utility model, a protective cover is arranged on the cooling wall.

[0010] The beneficial effects of the present utility model are as follows: the rectangular first frame can protect the blast furnace iron notch from the radiant heat of the furnace skin during the tapping process, prevent the furnace skin from opening and cracking, and avoid the burnout of the iron notch frame caused by the scouring of the blast furnace iron notch area during the tapping process, and also avoid the opening of the second frame; after the installation of the second frame, the iron notch channel can be prevented from being damaged by the iron penetration, the mud sleeve can be easily made, the blast furnace iron notch channel can be protected from being damaged, and the damage of the blast furnace iron notch channel, the iron notch frame and the furnace skin can be prevented.

[0011] The second frame is welded and installed at the center line of the iron notch inside the blast furnace iron notch frame, the first frame is welded at the outside of the blast furnace iron notch frame, and the first frame and the second frame are used in combination, which can not only ensure the integrity of the blast furnace iron notch passage (the blast furnace iron notch passage is not easy to be burnt out) and prolong the service life of the blast furnace iron notch, but also solve the problems of long repair time after the mud sleeve is damaged and thermal load cracking of the furnace skin, and the mud sleeve is convenient, simple, time-saving, labor-saving and safe to operate.

[0012] The utility model discloses short time, save the manual cost, prolong the service life of blast furnace iron notch. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the structure front view of the utility model;

[0014] Fig. 2 It is the structure left view of the utility model;

[0015] Fig. 3 It is the structure plan view of the utility model.

[0016] In the drawing: 1 - first frame;2 - second frame;3 - blast furnace iron notch;4 - tuyere platform;5 - heat - resistant spray material;6 - cooling wall water pipe;7 - protective cover;8 - furnace shell;9 - mud sleeve;10 - cooling wall. DETAILED DESCRIPTION

[0017] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0018] As Figs. 1-3 The utility model discloses a blast furnace iron notch, including the blast furnace iron notch 3 that sets up on the blast furnace body furnace shell 8, the blast furnace iron notch 3 outside is equipped with the first frame 1, the blast furnace iron notch 3 inside is equipped with the second frame 2, and the first frame 1 and the second frame 2 center are concentric with the blast furnace iron notch 3 center line, and the first frame 1 and the second frame 2 are all rectangular, and the second frame 2 is equipped with the mud sleeve 9 in.

[0019] The blast furnace iron notch 3 and the blast furnace body are equipped with the cooling wall 10, and the cooling wall 10 is evenly distributed with a plurality of cooling wall water pipes 6. The blast furnace iron notch 3 is provided with a tuyere platform 4, and the tuyere platform 4 and the top of the cooling wall 10 are provided with heat -resistant spray material 5. The cooling wall 10 is provided with a protective cover 7.

[0020] Example 1,

[0021] The actual size of the first frame 1 and the second frame 2 is set according to the matching degree of the size of the blast furnace taphole 3, and must be set below the protection plate of the blast furnace taphole 3, the first frame 1 is welded outside the blast furnace taphole 3, the second frame 2 is welded and installed inside the blast furnace taphole 3, and the length, width and height of the second frame 2 are 600mm*400mm*200mm. The welding and installation requirements are: the centers of the first frame 1 and the second frame 2 are aligned with the center line of the blast furnace taphole 3 for welding, the first frame 1 and the second frame 2 are welded and anchored for pouring, the second frame 2 is poured with high-strength castable mud sleeve 9, the overall plane is 200mm higher than the frame of the blast furnace taphole 3, and the mud bubble and the opening machine base are designed and adjusted. In normal production, if the mud sleeve 9 is damaged, only the inside of the second frame 2 is repaired, which is convenient for maintaining the normal operation of the blast furnace taphole 3. The cooling wall water pipe 6 includes a cooling wall water pipe and a pipe connection.

Claims

1. A blast furnace taphole, comprising a taphole formed on the furnace shell of the blast furnace body, characterized in that: The blast furnace taphole (3) is provided with a first frame (1) on the outside and a second frame (2) on the inside. The center of the first frame (1) and the second frame (2) are concentric with the center line of the blast furnace taphole (3). The first frame (1) and the second frame (2) are both rectangular. The second frame (2) is provided with a mud sleeve (9).

2. The blast furnace taphole according to claim 1, characterized in that: A cooling wall (10) is provided between the blast furnace taphole (3) and the blast furnace body, and multiple cooling wall water pipes (6) are evenly distributed on the cooling wall (10).

3. The blast furnace taphole according to claim 2, characterized in that: A tuyere platform (4) is provided above the blast furnace taphole (3), and a heat-resistant spray coating (5) is provided between the tuyere platform (4) and the top of the cooling wall (10).

4. A blast furnace taphole according to claim 3, characterized in that: The cooling wall (10) is provided with a protective cover (7).

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