Blast furnace coal lance special for pulverized coal injection and provided with anti-abrasion coating

Abstract

The utility model discloses a special blast furnace coal gun with an anti-wear coating for pulverized coal injection, which comprises a gun body, the right side of the gun body is communicated with a connecting valve, the top of the gun body is communicated with a connecting air pipe, the bottom of the gun body is fixedly connected with a gun body grip, and the left side of the gun body is provided with a mounting mechanism. A spray gun barrel is arranged on the left side of the mounting mechanism and comprises a supporting pipe body. Through the cooperation of the fixing frame, the connector, the mounting block, the spring, the first connecting plate, the limiting clamping block and the second connecting plate, the blowing part can be conveniently disassembled, so that the blowing part can be quickly disassembled and replaced when being replaced, the practicability of the equipment is improved, and the practicability of the equipment is improved. And through cooperation of the third wear-resistant layer, the anti-wear layer, the first wear-resistant layer and the second wear-resistant layer, the wear resistance of the part can be improved, so that when the part is used, the overall wear resistance of the part can be improved, and the service life of the part is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnaces, in particular to a special blast furnace coal gun for coal powder injection with an anti-wear coating. Background Art

[0002] The blast furnace uses steel plates as the furnace shell and a refractory brick lining inside the shell. The blast furnace body is divided into five parts from top to bottom: furnace throat, furnace body, furnace waist, furnace belly, and furnace hearth. Due to the good technical and economic indicators of blast furnace ironmaking, simple process, large production volume, high labor productivity and low energy consumption, the iron produced by this method accounts for the vast majority of the world's total iron production.

[0003] The invention patent with patent application publication number CN201028509Y discloses a blast furnace pressurized wear-resistant coal injection gun, including a gun body and a gun head. The gun head is composed of a steel pipe and a metal ceramic lining thereof. The diameter of the gun body is slightly smaller than the diameter of the gun head part. A manual stainless steel hard-sealed ball valve is provided at the tail of the gun body and a ball valve is provided in the middle. The bottom of the inner wall of the gun head forms an irregular corrugated slope. The utility model coal injection gun has a simple structure, convenient operation, and greatly improved high-temperature thermal stability. The gun head and the gun body adopt different diameters, which greatly improves the injection pressure of the coal powder. The coal seedling is 2 to 4 times longer than that of a single-diameter coal injection gun. The ball valve is a ready-to-use and open type, which makes the operation of the coal injection gun in and out of the blast furnace hearth simpler, and no additional action is required during operation, and the sealing is safer and more reliable.

[0004] However, the above device still has some shortcomings in actual use. The most obvious one is that it is usually inconvenient to disassemble and replace the blowing parts during use. During blast furnace calcination, it is sometimes necessary to control the blowing amount of coal powder, but it will take a lot of time for the staff to replace the whole part during replacement, which may affect the calcination of the material and increase the workload of the staff. Moreover, when in use, the equipment is generally only protected against wear by a simple structure. Therefore, the anti-wear structure may not be able to effectively protect the equipment during use, which may easily reduce the protectiveness of the equipment.

[0005] Therefore, it is necessary to invent a special blast furnace coal gun for coal powder injection with an anti-wear coating to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a special blast furnace coal gun for coal powder injection with an anti-wear coating, which has the advantages of easy replacement of blowing components and effective anti-wear protection of the equipment, solving the problem that it is usually inconvenient to disassemble and replace the blowing components, and when in use, the anti-wear protection of the equipment is generally only carried out by a simple structure.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a blast furnace coal gun for coal powder injection with an anti-wear coating, comprising a gun body, the right side of the gun body is connected to a connecting valve, the top of the gun body is connected to a connecting air pipe, the bottom of the gun body is fixedly connected to a gun body handle, the left side of the gun body is provided with a mounting mechanism, the left side of the mounting mechanism is provided with a spray gun barrel, the spray gun barrel comprises a supporting tube body, the outer side of the supporting tube body is fixedly connected to an anti-wear layer, the anti-wear layer comprises a first wear-resistant layer, the outer side of the first wear-resistant layer is fixedly connected to a second wear-resistant layer, and the outer side of the second wear-resistant layer is fixedly connected to a third wear-resistant layer.

[0008] Preferably, a protective baffle is fixedly provided on the surface of the spray gun barrel, and a placement hook is fixedly connected to the right side of the top of the gun body.

[0009] Preferably, the mounting mechanism includes a fixed frame, the right side of the fixed frame is fixedly connected to the gun body, the left side of the gun body is connected to a connecting head, springs are fixedly connected to both sides of the inner cavity of the fixed frame, the opposite sides of the two springs are fixedly connected to the first connecting plates, the opposite sides of the two first connecting plates are fixedly connected to the limiting blocks, the opposite sides of the two first connecting plates are fixedly connected to the second connecting plates, and the upper and lower sides of the surface of the spray gun barrel are fixedly connected to mounting blocks.

[0010] Preferably, a limited pulling plate is fixedly connected to the right side of the first connecting plate, and pulling plates are fixedly connected to the opposite sides of the two second connecting plates.

[0011] Preferably, the material of the first wear-resistant layer is tungsten-nickel alloy, the material of the second wear-resistant layer is metal ceramic, and the third wear-resistant layer is high-temperature wear-resistant coating.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model facilitates the disassembly of the blowing component by cooperating with the fixing frame, the connecting head, the mounting block, the spring, the first connecting plate, the limiting block and the second connecting plate, so that when replacing it, it can be quickly disassembled and replaced, thereby increasing the practicality of the equipment.

[0014] 2. The utility model can increase the wear resistance of the component through the cooperation of the third wear-resistant layer, the wear-resistant layer, the first wear-resistant layer and the second wear-resistant layer, so that when the component is in use, the overall wear resistance of the component can be increased, thereby increasing the service life of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0016] Figure 2This is an exploded perspective view of the installation mechanism of the utility model;

[0017] Figure 3 This is a cutaway perspective view of a spray gun barrel of the utility model;

[0018] Figure 4 It is a sectional stereoscopic diagram of the anti-wear layer of the local structure of the utility model.

[0019] In the figure: 1 gun body, 2 connecting air pipe, 3 placing hook, 4 connecting valve, 5 gun body handle, 6 third wear-resistant layer, 7 mounting mechanism, 8 spray gun barrel, 9 protective baffle, 10 fixing frame, 11 connecting head, 12 mounting block, 13 spring, 14 first connecting plate, 15 limiting block, 16 second connecting plate, 17 supporting tube body, 18 anti-wear layer, 19 first wear-resistant layer, 20 second wear-resistant layer. DETAILED DESCRIPTION

[0020] See also Figure 1-Figure 4 A blast furnace coal gun for coal powder injection with an anti-wear coating comprises a gun body 1, the right side of the gun body 1 is connected with a connecting valve 4, the top of the gun body 1 is connected with a connecting air pipe 2, the bottom of the gun body 1 is fixedly connected with a gun body handle 5, the left side of the gun body 1 is provided with a mounting mechanism 7, the left side of the mounting mechanism 7 is provided with a spray gun barrel 8, the spray gun barrel 8 comprises a supporting tube body 17, the outer side of the supporting tube body 17 is fixedly connected with an anti-wear layer 18, the anti-wear layer 18 comprises a first wear-resistant layer 19, the outer side of the first wear-resistant layer 19 is fixedly connected with a second wear-resistant layer 20, and the outer side of the second wear-resistant layer 20 is fixedly connected with a third wear-resistant layer 6, by providing the supporting tube body 17, the spray gun barrel 8 can be supported, and the anti-wear layer 18 can also be installed, and by providing the connecting valve 4, the amount of material entering can be adjusted so that the blast furnace can calcine the material. A protective baffle 9 is fixedly sleeved on the surface of the spray gun barrel 8, and a placement hook 3 is fixedly connected to the right side of the top of the gun body 1. By setting the protective baffle 9, the gun body 1 can be protected, and the high temperature of the blast furnace can also be prevented from affecting the gun body 1. By setting the placement hook 3, it is convenient for the user to hang the gun body 1, thereby increasing the practicability of the equipment.

[0021] The mounting mechanism 7 includes a fixed frame 10, the right side of the fixed frame 10 is fixedly connected to the gun body 1, the left side of the gun body 1 is connected to a connector 11, both sides of the inner cavity of the fixed frame 10 are fixedly connected with springs 13, the opposite sides of the two springs 13 are fixedly connected with a first connecting plate 14, the opposite sides of the two first connecting plates 14 are fixedly connected with a limiting block 15, the opposite sides of the two first connecting plates 14 are fixedly connected with a second connecting plate 16, the upper and lower sides of the surface of the spray gun barrel 8 are fixedly connected with mounting blocks 12, and by setting the second connecting plate 16, the first connecting plate 14 can be guided and limited to prevent the first connecting plate 14 from sending displacement when moving, so as to increase the stability of the first connecting plate 14 when moving.

[0022] The right side of the first connecting plate 14 is fixedly connected to a limiting pull plate, and the opposite sides of the two second connecting plates 16 are fixedly connected to pulling plates. By setting the limiting pull plate, the mounting block 12 can be limited to increase the stability of the installation of the spray gun barrel 8. By setting the pulling plate, it is convenient for the user to pull the second connecting plate 16 so that the first connecting plate 14 drives the limiting block 15 to move.

[0023] The material of the first wear-resistant layer 19 is tungsten-nickel alloy, the material of the second wear-resistant layer 20 is metal ceramic, and the third wear-resistant layer 6 is high-temperature wear-resistant coating.

[0024] When in use, the user first connects the gas supply pipe with the connecting gas pipe 2, and then connects the feeding pipe with the connecting valve 4, so that the gun body 1 blows the coal powder into the blast furnace so that the blast furnace can calcine the material. When it is necessary to replace the spray gun barrel 8 of the corresponding model, the user first pulls the second connecting plate 16 through the pulling plate. The second connecting plate 16 drives the first connecting plate 14 to move when moving, so that the first connecting plate 14 can pull the limiting block 15 out of the mounting block 12, so as to release the limiting of the spray gun barrel 8 by the mounting block 12. After releasing the limiting, the user removes the spray gun barrel 8 from the connecting head 11, and then installs the spray gun barrel 8 of the corresponding model. By setting the first wear-resistant layer 19 , which can increase the overall wear resistance of the spray gun barrel 8, and also increase the melting resistance and overall strength of the spray gun barrel 8, and also increase the corrosion resistance of the spray gun barrel 8. By setting the second wear-resistant layer 20, it can cooperate with the first wear-resistant layer 19 to increase the overall wear resistance of the spray gun barrel 8, and also increase the bending resistance and overall toughness of the spray gun barrel 8, and also increase the weather resistance and high temperature resistance of the spray gun barrel 8. By setting the third wear-resistant layer 6, it can cooperate with the first wear-resistant layer 19 and the second wear-resistant layer 20 to increase the wear resistance of the spray gun barrel 8, and also increase the overall strength and pressure resistance of the spray gun barrel 8, and also increase the oxidation resistance and high temperature resistance of the spray gun barrel 8.

[0025] To sum up: the special blast furnace coal gun for coal powder injection with anti-wear coating, through the coordinated use of the gun body 1, the connecting air pipe 2, the placement hook 3, the connecting valve 4, the gun body handle 5, the third wear-resistant layer 6, the mounting mechanism 7, the spray gun barrel 8 and the protective baffle 9, solves the problem that it is usually inconvenient to disassemble and replace the blowing parts, and when in use, the equipment is generally only protected against wear through a simple structure.

Claims

1. A blast furnace coal gun for coal powder injection with an anti-wear coating, comprising a gun body (1), characterized in that: The right side of the gun body (1) is connected to a connecting valve (4), the top of the gun body (1) is connected to a connecting air pipe (2), the bottom of the gun body (1) is fixedly connected to a gun body handle (5), the left side of the gun body (1) is provided with a mounting mechanism (7), the left side of the mounting mechanism (7) is provided with a spray gun barrel (8), the spray gun barrel (8) comprises a supporting tube body (17), the outer side of the supporting tube body (17) is fixedly connected to an anti-wear layer (18), the anti-wear layer (18) comprises a first wear-resistant layer (19), the outer side of the first wear-resistant layer (19) is fixedly connected to a second wear-resistant layer (20), and the outer side of the second wear-resistant layer (20) is fixedly connected to a third wear-resistant layer (6).

2. The blast furnace coal gun for coal powder injection with an anti-wear coating according to claim 1, characterized in that: A protective baffle (9) is fixedly sleeved on the surface of the spray gun barrel (8), and a placement hook (3) is fixedly connected to the right side of the top of the gun body (1).

3. The blast furnace coal gun for coal powder injection with an anti-wear coating according to claim 1, characterized in that: The mounting mechanism (7) comprises a fixing frame (10), the right side of the fixing frame (10) is fixedly connected to the gun body (1), the left side of the gun body (1) is connected to a connector (11), both sides of the inner cavity of the fixing frame (10) are fixedly connected to springs (13), the opposite sides of the two springs (13) are fixedly connected to a first connecting plate (14), the opposite sides of the two first connecting plates (14) are fixedly connected to a limiting block (15), the opposite sides of the two first connecting plates (14) are fixedly connected to a second connecting plate (16), and the upper and lower sides of the surface of the spray gun barrel (8) are fixedly connected to mounting blocks (12).

4. The blast furnace coal gun for coal powder injection with an anti-wear coating according to claim 3 is characterized in that: The right side of the first connecting plate (14) is fixedly connected to a limited pull plate, and the opposite sides of the two second connecting plates (16) are both fixedly connected to a pull plate.

5. The blast furnace coal gun for coal powder injection with an anti-wear coating according to claim 1, characterized in that: The material of the first wear-resistant layer (19) is a tungsten-nickel alloy, the material of the second wear-resistant layer (20) is a metal ceramic, and the third wear-resistant layer (6) is a high-temperature wear-resistant coating.

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