Burning loss prevention blast furnace tuyere small sleeve

Abstract

The utility model discloses an anti-burning-loss blast-furnace tuyere small sleeve, which belongs to the technical field of iron-making blast furnaces and comprises a tuyere small sleeve, a rectangular frame is arranged at the upper part of the front end of the tuyere small sleeve, a plurality of anchoring nails are uniformly arranged in the rectangular frame, and after the anchoring nails are arranged, the tuyere small sleeve is fixed on the tuyere small sleeve. And a layer of high-strength corundum castable is uniformly poured in the imitated rectangular frame by adopting a pouring process. On the premise that the using effect and the material quality of the tuyere small sleeve are not changed, part of refractory is added to the upper portion of the front end of the tuyere small sleeve, burning loss of the front end of the tuyere small sleeve is effectively avoided, burning loss of the tuyere small sleeve is remarkably reduced in the time period of fluctuation of the furnace condition of the blast furnace, the frequency of blast furnace damping-down sleeve replacement is greatly reduced, and the service life of the tuyere small sleeve is prolonged. And the service time of the tuyere small sleeve is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of iron-making blast furnaces, in particular to a small blast furnace tuyere sleeve that prevents burning. Background Art

[0002] The blast furnace tuyere sleeve is an important device in the blast furnace air intake system. It is made of copper and has cooling water inside. It protrudes into the furnace to prevent hot air and coal powder from directly scouring the furnace wall. Its function is to send hot air into the blast furnace. Its front end is a high-temperature environment of nearly 2000℃, the temperature of the slag iron melt is above 1400℃, and the temperature of the hot air passing through the blast furnace tuyere sleeve is also around 1250℃. The working environment of the blast furnace tuyere sleeve is extremely harsh. When the blast furnace condition is unstable and the slag skin of the furnace wall frequently falls off, the front end of the tuyere sleeve is severely burned. It needs to be replaced every week. The number of sleeves replaced each time is 3-4, and the upper burning causes 70-80% of the leakage of the tuyere sleeve.

[0003] Therefore, in view of the above problems, a small sleeve for blast furnace tuyere that prevents burning is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a blast furnace tuyere sleeve that is resistant to burning. Under the premise of not changing the use effect and material quality of the tuyere sleeve, some refractory materials are added to the upper part of the front end of the tuyere sleeve, which effectively avoids the burning of the front end of the tuyere sleeve, increases the use time of the tuyere sleeve, reduces the number of blast furnace sleeve changes, and reduces production costs.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A blast furnace tuyere sleeve for preventing burning includes a tuyere sleeve, wherein an imitation rectangular frame is arranged on the upper front end of the tuyere sleeve, and a plurality of anchoring nails are evenly arranged in the imitation rectangular frame. After the anchoring nails are arranged, a layer of high-strength corundum castable is evenly cast in the imitation rectangular frame by using a casting process.

[0007] A further improvement of the technical solution of the utility model is that the height of the imitation rectangular frame is 30 mm, the width is 80 mm and the length is 200 mm.

[0008] A further improvement of the technical solution of the utility model is that the material of the imitation rectangular frame is consistent with the material of the air outlet small sleeve.

[0009] A further improvement of the technical solution of the utility model is that the particles of the high-strength corundum castable are uniform and the particle size is not greater than 5 mm.

[0010] A further improvement of the technical solution of the utility model is that the thickness of the high-strength corundum castable after drying is consistent with the height of the imitation rectangular frame.

[0011] A further improvement of the technical solution of the utility model is that the anchoring nails are welded on the side walls of the small air outlet sleeve in the imitation rectangular frame.

[0012] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0013] 1. The utility model adds some refractory materials to the upper front end of the tuyere sleeve without changing the use effect and material quality of the tuyere sleeve, which effectively avoids the burning of the front end of the tuyere sleeve. In the period of time when the blast furnace condition fluctuates, the burning of the tuyere sleeve is significantly reduced, the number of blast furnace shutdowns and sleeve replacements is greatly reduced, and the service life of the tuyere sleeve is increased. Compared with before the transformation, the number of shutdowns and sleeve replacements is reduced by half, and the upper burned tuyere sleeve is reduced to 30%, which effectively reduces the production cost.

[0014] 2. The utility model greatly alleviates the number of times the blast furnace burns the sleeve, especially when the furnace condition fluctuates greatly, the slag skin is unstable, and the slag skin falls off frequently. The use of the tuyere sleeve provided by the utility model plays a positive role in stabilizing the furnace condition, and the annual profit is about 700,000 yuan. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the structure of a small sleeve for blast furnace tuyere that prevents burning provided in the embodiment of the utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of a small sleeve of a blast furnace tuyere that prevents burning in an embodiment of the utility model. Figure 2 ;

[0018] Among them, 1. Small air vent cover; 2. Imitation rectangular frame; 3. Anchor nails. DETAILED DESCRIPTION

[0019] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0023] like Figure 1 , 2 As shown, a blast furnace tuyere sleeve to prevent burning includes a tuyere sleeve 1, a simulated rectangular frame 2 is arranged at the upper front end of the tuyere sleeve 1, and a plurality of anchoring nails 3 are evenly arranged in the simulated rectangular frame 2. After the anchoring nails 3 are arranged, a layer of high-strength corundum castable is evenly poured in the simulated rectangular frame 2. After a layer of high-strength corundum castable is evenly poured in the simulated rectangular frame 2, it is slowly dried so that the high-strength corundum castable is tightly combined with the anchoring nails 3 to achieve the best effect. During the welding and pouring process, the welding should be uniform, flat, smooth and free of burrs, the high-strength corundum castable should be properly dry and wet, the particles should be uniform and not too large, preferably 5mm, and rapid cooling and heating should be avoided during the baking process.

[0024] Further, the height of the imitation rectangular frame 2 is 30mm, the width is 80mm, and the length is 200mm. Specifically, a imitation rectangular frame 2 with a height of 30mm, a width of 80mm, and a length of 200mm is welded using copper plates, welding rods, and copper bars of the same material as the tuyere small sleeve 1.

[0025] Furthermore, the size of the imitation rectangular frame 2 is set according to the size of the tuyere cover 1, and the imitation rectangular frame 2 of different sizes is set to be different.

[0026] Furthermore, the material of the imitation rectangular frame 2 is consistent with the material of the air outlet cover 1.

[0027] Furthermore, the particles of the high-strength corundum castable are uniform, and the particle size is no greater than 5 mm.

[0028] Furthermore, the thickness of the high-strength corundum castable after drying is consistent with the height of the imitation rectangular frame 2 .

[0029] Furthermore, the anchoring nails 3 are welded to the side wall of the air outlet small sleeve 1 in the imitation rectangular frame 2 .

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A blast furnace tuyere sleeve for preventing burning, comprising a tuyere sleeve (1), characterized in that: An imitation rectangular frame (2) is provided at the upper front end of the tuyere sleeve (1), and a plurality of anchoring nails (3) are evenly arranged in the imitation rectangular frame (2). After the anchoring nails (3) are arranged, a layer of high-strength corundum castable material is evenly cast in the imitation rectangular frame (2) by using a casting process.

2. The anti-burning blast furnace tuyere sleeve according to claim 1, characterized in that: The imitation rectangular frame (2) has a height of 30 mm, a width of 80 mm and a length of 200 mm.

3. The anti-burning blast furnace tuyere sleeve according to claim 1, characterized in that: The material of the imitation rectangular frame (2) is consistent with the material of the air outlet small cover (1).

4. The anti-burning blast furnace tuyere sleeve according to claim 1, characterized in that: The particles of the high-strength corundum castable are uniform, and the particle size is no greater than 5 mm.

5. The anti-burning blast furnace tuyere sleeve according to claim 1, characterized in that: The thickness of the high-strength corundum castable after drying is consistent with the height of the imitation rectangular frame (2).

6. The anti-burning blast furnace tuyere sleeve according to claim 1, characterized in that: The anchoring nails (3) are welded to the side wall of the air outlet small sleeve (1) inside the imitation rectangular frame (2).

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