Main iron runner cover of blast furnace

Abstract

The utility model relates to a blast furnace main iron runner cover which comprises a cover body composed of a shell and a refractory lining, the cover body is arched, a plurality of air holes are formed in the cover body, flaring sections are arranged at the two ends of the cover body, an outer retaining wall and an inner retaining wall are arranged at the two ends in the cover body along the inner wall respectively, the outer retaining wall and the inner retaining wall are arranged at intervals, and the outer retaining wall and the inner retaining wall are the same in structure. Comprising a metal wall plate, the metal wall plate is fixedly connected with a shell, a refractory material layer covers the metal wall plate, the refractory material layer and a refractory material lining form an integrated structure, and an arch-shaped channel is formed in the middle of an outer retaining wall and the middle of an inner retaining wall. The trumpet-shaped flaring can enlarge the coverage area and the shielding area, prevent air convection interference and dust escape, prevent particles entering the main iron runner cover from scattering, and improve the slag iron splashing and sucking effect. The outer retaining wall and the inner retaining wall can forcibly control the spraying speed of molten slag and iron, and kinetic energy and impact force are reduced.

Description

Technical Field

[0001] The utility model relates to the field of blast furnace auxiliary equipment, in particular to a main iron channel cover of a blast furnace. Background Art

[0002] At present, large blast furnaces all use the iron storage type main iron ditch to tap iron. When the blast furnace is in normal tapping state, a main iron ditch cover must be placed above the main iron ditch to protect the furnace front equipment around the main iron ditch. In addition, the main iron ditch cover can prevent the heat radiation of molten iron and prevent slag iron splashing and scalding for the furnace front workers.

[0003] There is a certain pressure in the blast furnace. When the slag iron is ejected from the tap hole into the main iron channel, it forms a radiating trumpet shape, with a certain kinetic energy and impact force, which washes the refractory castable lining of the inner wall of the main iron channel cover. If the main iron channel cover burns and falls into the main iron channel, it will block the hydraulic mud gun's running track, causing the blast furnace tap hole to be unable to be blocked, resulting in high-temperature molten slag and iron overflowing outside the iron tank, and even burning the iron tank car and railway. In addition, the main iron channel cover is frequently replaced, increasing the cost of spare parts.

[0004] The existing patent CN207998619U is a throttling type blast furnace main iron groove heat shield, including a metal shell with a U-shaped cross section, a cross-shaped reinforcement rib welded on the outside of the metal shell, a plurality of herringbone anchor hooks fixed on the inner wall of the metal shell, and a refractory castable lining is fixed on the inner wall of the metal shell, the herringbone anchor hooks are embedded in the refractory castable lining, and a raised throttling port is provided on the inner wall of the refractory castable lining, and the throttling port is arranged on the side where the heat shield is connected to the blast furnace tapping port. The device is an equal-width cover body with a small shielding area. Part of the slag iron mixture splashes over the heat shield and splashes on the equipment in front of the furnace, causing the parts to fail due to heat, and even lose their original functions and become scrapped. In addition, the front and rear ends of the heat shield are asymmetrical, resulting in the instability of the center of gravity during the movement of the heat shield, which is very easy to cause unhooking, and it cannot be turned around and used symmetrically. In addition, the heat shield has no air vents, which causes the castable to expand and burst and fall off due to heat, reducing the service life. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a main iron groove cover of a blast furnace, so as to improve the slag iron splashing and suction effect and prolong the service life of the main iron groove cover.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A blast furnace main iron ditch cover comprises a cover body consisting of a shell and a refractory lining, the cover body is arched, a plurality of air holes are arranged on the cover body, flaring sections are arranged at both ends of the cover body, outer retaining walls and inner retaining walls are respectively arranged along the inner wall at both ends of the cover body, the outer retaining walls and the inner retaining walls are arranged at intervals, the outer retaining walls and the inner retaining walls have the same structure, and comprise metal wall panels, the metal wall panels are fixedly connected to the shell, a refractory layer is covered on the metal wall panels, the refractory layer and the refractory lining form an integrated structure, and an arched channel is arranged in the middle of the outer retaining wall and the inner retaining wall.

[0008] The top of the expanded section is in a bell-mouth shape.

[0009] The outer retaining wall is arranged in the expansion section, and the inner retaining wall is arranged on the inner side of the outer retaining wall. The outer retaining wall and the inner retaining wall are spaced 380-420 mm apart.

[0010] The height from the top of the arched channel of the outer retaining wall to the bottom surface of the cover body is greater than the height from the top of the arched channel of the inner retaining wall to the bottom surface of the cover body.

[0011] The diameter of the air vent is 10-15 mm.

[0012] The shell and the metal wall plate are both fixedly connected with a plurality of anchor nails.

[0013] The top of the cover body is fixedly connected to the lifting ear.

[0014] Compared with the existing technology, the beneficial effects of the utility model are:

[0015] 1. The trumpet-shaped expansion can increase the coverage area and shielding area, prevent the interference of air convection and dust escape, avoid the particles entering the main iron ditch cover from flying, and improve the slag splashing and suction effect.

[0016] 2. The outer retaining wall and the inner retaining wall can forcibly control the injection speed of molten slag and iron, reduce kinetic energy and impact force, so as to solve the problem that the main iron ditch cover is often burned in the prior art, and even the blast furnace tapping port cannot be blocked.

[0017] 3. The outer retaining wall and the inner retaining wall are designed symmetrically. After one end is burned, it only needs to be rotated 180° horizontally to continue to be used, which extends the service life, has low use cost and low maintenance cost.

[0018] 4. The breathing holes can fully discharge the moisture in the castable from the shell to avoid cracks or large-scale falling off of the castable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a side view of the utility model.

[0021] Figure 3 It is an internal schematic diagram of the utility model.

[0022] Figure 4 A schematic diagram of the shell.

[0023] In the figure: cover body 1, air vent 2, expansion section 3, outer retaining wall 4, inner retaining wall 5, metal wall panel 6, refractory layer 7, anchor nails 8, lifting ears 9, shell 11, refractory lining 12. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means more than two.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] like Figure 1-Figure 4 A blast furnace main iron ditch cover includes a cover body 1 composed of a shell body 11 and a refractory lining 12. The cover body 1 is arched and is provided with a plurality of air holes 2. Both ends of the cover body 1 are provided with expansion sections 3. Both ends of the cover body 1 are provided with outer retaining walls 4 and inner retaining walls 5 along the inner wall, respectively. The outer retaining walls 4 and the inner retaining walls 5 are arranged at intervals. The outer retaining walls 4 and the inner retaining walls 5 have the same structure and include metal wall panels 6. The metal wall panels 6 are fixedly connected to the shell body 11. A refractory layer 7 is covered on the metal wall panels 6. The refractory layer 7 and the refractory lining 11 form an integrated structure. An arched channel 7 is provided in the middle of the outer retaining wall 4 and the inner retaining wall 5.

[0027] The top of the flared section 3 is a trumpet-shaped one, which increases the heat dissipation area, helps to concentrate the splashing slag iron, and helps the splashing slag iron to spread in a concentrated manner toward the center of the iron flow groove.

[0028] The outer retaining wall 4 is arranged in the expansion section 3, and the inner retaining wall 5 is arranged on the inner side of the outer retaining wall 4. The outer retaining wall 4 and the inner retaining wall 5 are spaced 380-420 mm apart.

[0029] The height from the top of the arched channel 7 of the outer retaining wall 4 to the bottom of the cover body 1 is greater than the height from the top of the arched channel of the inner retaining wall 4 to the bottom of the cover body 1. The slag ejected by the outer retaining wall 4 and the inner retaining wall 5 is decelerated twice, so that its kinetic energy is completely lost.

[0030] The diameter of the air vent 2 is 10-15 mm.

[0031] A plurality of anchoring nails 8 are fixedly connected to the shell 11 and the metal wall plate 6 .

[0032] The top of the cover body 1 is fixedly connected to a lifting ear 9 .

[0033] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is now described clearly and completely. However, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. In combination with the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example

[0035] A blast furnace main iron channel cover comprises a cover body 1 consisting of a shell 11 and a refractory lining 12. The cover body 1 is arched and provided with a plurality of air holes 2. The diameter of the air holes 2 is 10 mm.

[0036] The two ends of the cover body 1 are provided with a flared section 3, and the top of the flared section 3 is a trumpet shape. The two ends of the cover body 1 are respectively provided with an outer retaining wall 4 and an inner retaining wall 5 along the inner wall, the outer retaining wall 4 is arranged in the flared section 3, and the inner retaining wall 5 is arranged on the inner side of the outer retaining wall 4, and the outer retaining wall 4 and the inner retaining wall 5 are spaced 400mm apart.

[0037] The outer retaining wall 4 and the inner retaining wall 5 have the same structure, including a metal wall plate 6, which is fixedly connected to the shell 11, and a refractory layer 7 is covered on the metal wall plate 6, and the refractory layer 7 and the refractory lining 11 form an integral structure, and an arched channel 7 is provided in the middle of the outer retaining wall 4 and the inner retaining wall 5. The arched channel 7 of the outer retaining wall 4 is 200 mm higher than the arched channel of the inner retaining wall 4.

[0038] A plurality of anchoring nails 8 are fixedly connected to the shell 11 and the metal wall plate 6 .

[0039] The top of the cover body 1 is fixedly connected to a lifting ear 9 .

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace main iron channel cover, characterized in that: The invention comprises a cover body consisting of a shell and a refractory lining, the cover body is arched, a plurality of air holes are arranged on the cover body, flared sections are arranged at both ends of the cover body, outer retaining walls and inner retaining walls are respectively arranged along the inner wall at both ends inside the cover body, the outer retaining walls and the inner retaining walls are arranged at intervals, the outer retaining walls and the inner retaining walls have the same structure, and comprise metal wall panels, the metal wall panels are fixedly connected to the shell, a refractory layer is covered on the metal wall panels, the refractory layer and the refractory lining form an integrated structure, and an arched channel is arranged in the middle of the outer retaining wall and the inner retaining wall.

2. A blast furnace main iron channel cover according to claim 1, characterized in that: The top of the flared section is in a bell-mouth shape.

3. A blast furnace main iron channel cover according to claim 1, characterized in that: The outer retaining wall is arranged in the expansion section, and the inner retaining wall is arranged on the inner side of the outer retaining wall. The outer retaining wall and the inner retaining wall are spaced 380-420 mm apart.

4. A blast furnace main iron channel cover according to claim 1, characterized in that: The height from the top of the arched channel of the outer retaining wall to the bottom surface of the cover body is greater than the height from the top of the arched channel of the inner retaining wall to the bottom surface of the cover body.

5. A blast furnace main iron channel cover according to claim 1, characterized in that: The diameter of the air vent is 10-15 mm.

6. A blast furnace main iron channel cover according to claim 1, characterized in that: The shell and the metal wall plate are both fixedly connected with a plurality of anchor nails.

7. A blast furnace main iron channel cover according to claim 1, characterized in that: The top of the cover body is fixedly connected to the lifting ear.

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