CN223705632U

CN223705632U - Blast furnace iron notch

Info

Publication number: CN223705632U
Application number: CN202520050309.5U
Authority: CN
Inventors: 魏万虎; 祁占林; 王正鹏
Original assignee: Jiugang Group Yuzhong Iron And Steel Co ltd
Current assignee: Jiugang Group Yuzhong Iron And Steel Co ltd
Priority date: 2025-01-09
Filing date: 2025-01-09
Publication date: 2025-12-23
Anticipated expiration: 2035-01-09

Abstract

The utility model discloses a blast furnace iron notch, which belongs to the technical field of iron-making blast furnace front iron notch, solves the problems of short service life and malignant accidents of the blast furnace iron notch, comprises the blast furnace iron notch arranged on a furnace shell of a blast furnace body, the outside of the blast furnace iron notch is provided with a first frame, the inside of the blast furnace iron notch is provided with a second frame, 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. The utility model solves various defects existing in the existing blast furnace taphole, achieves the application effects of safety, stability, simplicity, convenience, high efficiency and long service life, and avoids the serious accident of burning loss of the blast furnace taphole, thereby affecting the long-term stable and smooth running of the furnace condition.

Description

Blast furnace iron notch

Technical Field

The utility model belongs to the technical field of a tap hole in front of an iron-making blast furnace, and particularly relates to a tap hole of the blast furnace.

Background

The maintenance of a blast furnace tap hole is one of the vital links in the steel production, and is directly related to the normal operation and production benefits of the blast furnace, and the tap hole is a tap hole of the blast furnace, and the quality condition of the tap hole directly influences the flow and stability of molten iron. Thus, maintaining the well-being of the tap hole is of vital importance for continuous production of the blast furnace, however, tap hole maintenance faces a series of challenges including high temperature, thermal stress, chemical attack, etc., which make tap hole maintenance work complicated and difficult. The importance of blast furnace tap hole maintenance is that it directly affects the production efficiency and stability of the blast furnace.

The tapping hole of the blast furnace is a key position for tapping the blast furnace, and once the tapping hole is in a problem, the tapping is not smooth and even the production is stopped, so that the operation of the whole steel production line is seriously influenced. Therefore, timely finding and solving the problem of the iron notch is important to ensuring the continuous production of the blast furnace. Blast furnace tap maintenance presents a number of challenges, including operating conditions in high temperature environments. The internal temperature of the blast furnace is extremely high, particularly at the tap hole, and the staff needs to carry out maintenance and repair work in an extremely high-temperature environment, which brings great difficulty and danger to the maintenance work. Meanwhile, the problems of thermal expansion, thermal stress and the like of materials in a high-temperature environment can further increase the abrasion and damage of a tap hole, and the difficulty and complexity of maintenance work are increased. The iron notch also faces challenges due to chemical attack and the like. There are large amounts of corrosive gases and substances, such as hydrogen sulfide, oxygen, etc., in the blast furnace, which can attack the material of the tap hole, resulting in increased damage and wear of the tap hole. Thus, in addition to thermal stresses in high temperature environments, the tap hole also needs to be resistant to damage from chemical attack, which places higher demands on tap hole maintenance. In view of the above, the importance of the operation of the tap hole of the blast furnace is self-evident, and it is directly related to the production efficiency and stability of the blast furnace. Therefore, iron and steel enterprises need to increase investment and importance on the maintenance work of the iron notch, and effective measures are taken to ensure the good state of the iron notch of the blast furnace, so that the continuous production of the blast furnace is ensured.

In the normal production process of the blast furnace, the heat load of the iron notch area is large, and the iron notch area not only bears the scouring of high-temperature slag iron and the extrusion of mud bubbles, but also is subjected to the scouring of high-temperature gas and chemical erosion, so that the iron notch area is a weaker part of the blast furnace body. The iron notch mud sleeve is an end surface of the iron notch, which is contacted with the mud gun, the mud sleeve is required to be complete, and the gun head is required to be closely matched with the mud sleeve during plugging. In actual tapping operation, with the improvement of the smelting intensity of the blast furnace, the maintenance of a tap hole and the integrity of a mud sleeve need to be further improved, if the mud sleeve is damaged due to the occurrence of problems, the mud can be run out during plugging, the tap hole is splashed, and the blast furnace is subjected to wind reduction and wind break plugging when serious, so that the normal production of the blast furnace is influenced due to long time consumption in the process of treating the mud sleeve.

Disclosure of utility model

The utility model aims to provide a blast furnace iron notch so as to solve the problems of short service life and severe accidents of the blast furnace iron notch.

The technical scheme is that the blast furnace iron notch comprises a blast furnace iron notch arranged on a furnace shell of a blast furnace body, a first frame is arranged on the outer side of the blast furnace iron notch, a second frame is 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.

As a further improvement of the 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 distributed on the cooling wall.

As a further improvement of the utility model, a tuyere platform is arranged above the blast furnace iron notch, and a heat-resistant spray paint is arranged between the tuyere platform and the top of the cooling wall.

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

The utility model has the advantages that after the rectangular first frame is installed, the radiation heat of the blast furnace iron notch on the furnace skin in the tapping process can be protected, the open welding and shattering of the furnace skin can be avoided, the impact of the scouring of the blast furnace iron notch area on the iron notch frame in the tapping process can be avoided, meanwhile, the open welding of the second frame can be avoided, after the second frame is installed, the iron notch is burnt out by the iron seepage of the front section of the iron notch channel, the mud sleeve can be conveniently manufactured, the blast furnace iron notch channel is protected from being damaged easily, and the damage of the blast furnace iron notch channel, the iron notch frame and the furnace skin can be avoided.

The second frame is welded and installed on the central line of the iron notch on the inner side of the iron notch frame, the first frame is welded on the outer side of the iron notch frame, and the first frame and the second frame are combined for use, so that the integrity of a iron notch channel of the blast furnace (the iron notch channel is not easy to burn out) can be guaranteed, the service life of the iron notch of the blast furnace is prolonged, the problems of long repair time, furnace skin heat load shatter and the like after the mud sleeve is damaged can be solved, and the method is convenient, simple and short in time consumption when the mud sleeve is repaired, and the labor intensity and the safety operation performance are improved.

The utility model has the advantages of short time consumption, labor cost saving and prolonged service life of the blast furnace iron notch. The utility model solves various defects existing in the existing blast furnace taphole, achieves the application effects of safety, stability, simplicity, convenience, high efficiency and long service life, and avoids the serious accident of burning loss of the blast furnace taphole, thereby affecting the long-term stable and smooth running of the furnace condition.

Drawings

FIG. 1 is a front elevational view of the structure of the present utility model;

FIG. 2 is a left side view of the structure of the present utility model;

Fig. 3 is a top view of the structure of the present utility model.

In the drawing, 1-first frame, 2-second frame, 3-blast furnace iron notch, 4-tuyere platform, 5-heat-resistant spray paint, 6-cooling wall water pipe, 7-protective cover, 8-furnace shell, 9-mud sleeve and 10-cooling wall.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1-3, a blast furnace iron notch comprises a blast furnace iron notch 3 arranged on a furnace shell 8 of a blast furnace body, a first frame 1 is arranged on the outer side of the blast furnace iron notch 3, a second frame 2 is arranged on the inner side of the blast furnace iron notch 3, the centers of the first frame 1 and the second frame 2 are concentric with the center line of the blast furnace iron notch 3, the first frame 1 and the second frame 2 are rectangular, and a mud sleeve 9 is arranged in the second frame 2.

A cooling wall 10 is arranged between the blast furnace iron notch 3 and the blast furnace body, and a plurality of cooling wall water pipes 6 are uniformly distributed on the cooling wall 10. A tuyere platform 4 is arranged above the blast furnace iron notch 3, and a heat-resistant spray paint 5 is arranged between the tuyere platform 4 and the top of the cooling wall 10. The cooling wall 10 is provided with a protective cover 7.

Example 1,

The actual sizes of the first frame 1 and the second frame 2 are set according to the matching degree condition of the sizes of the blast furnace iron notch 3, the actual sizes are required to be arranged below a protection plate of the blast furnace iron notch 3, the first frame 1 is welded on the outer side of the blast furnace iron notch 3, the second frame 2 is welded and installed on the inner side of the blast furnace iron notch 3, and the length, width and height of the second frame 2 are 600mm multiplied by 400mm multiplied by 200mm. The welding installation requirements are that the centers of the first frame 1 and the second frame 2 are aligned with the central line of the blast furnace iron notch 3 for welding, the first frame 1 and the second frame 2 are welded, anchored, grabbed and poured, the second frame 2 is internally poured with a high-strength pouring material into a mud sleeve 9, the whole plane is 200mm higher than the frame of the blast furnace iron notch 3, and the design and the adjustment of mud bubbles and a tapping machine base are carried out. In normal production, if the mud sleeve 9 is damaged, only the inside of the second frame 2 is repaired, so that the normal operation of the blast furnace taphole 3 is convenient to maintain. The stave water pipe 6 includes a stave water pipe and a header thereof.

Claims

1. A blast furnace iron notch comprises a blast furnace iron notch arranged on a furnace shell of a blast furnace body, and is characterized in that a first frame (1) is arranged on the outer side of the blast furnace iron notch (3), a second frame (2) is arranged on the inner side of the blast furnace iron notch (3), the centers of the first frame (1) and the second frame (2) are concentric with the center line of the blast furnace iron notch (3), the first frame (1) and the second frame (2) are rectangular, and a mud sleeve (9) is arranged in the second frame (2).

2. The blast furnace taphole according to claim 1, wherein a cooling wall (10) is arranged between the blast furnace taphole (3) and the blast furnace body, and a plurality of cooling wall water pipes (6) are uniformly distributed on the cooling wall (10).

3. A blast furnace iron notch according to claim 2, wherein a tuyere platform (4) is arranged above the blast furnace iron notch (3), and a heat-resistant spray paint (5) is arranged between the tuyere platform (4) and the top of the cooling wall (10).

4. A blast furnace tap hole according to claim 3, wherein a protective cover (7) is provided on the cooling wall (10).