High-durability blast furnace tuyere small sleeve

Abstract

The utility model provides a blast furnace tuyere small sleeve with high durability, which comprises a tuyere small sleeve outer cylinder, a tuyere small sleeve inner cylinder and a flange, a flow chamber is formed between the tuyere small sleeve outer cylinder and the tuyere small sleeve inner cylinder, a cooling water flow director for guiding cooling water to flow is arranged in the flow chamber, the flange is made of pure copper materials in a casting mode, and the flange is made of pure copper materials. The tuyere small sleeve outer cylinder is manufactured and formed by hot extrusion of pure copper materials, the tuyere small sleeve inner cylinder is formed by casting of stainless steel materials, the cooling water fluid director is formed by welding of carbon steel materials, and the tuyere small sleeve inner cylinder is connected with the tuyere small sleeve outer cylinder, the cooling water fluid director and the flange through the 3D cladding technology. A first 3D cladding connection point is arranged between the tuyere small sleeve inner barrel and the tuyere small sleeve outer barrel, a second 3D cladding connection point is arranged between the tuyere small sleeve inner barrel and the cooling water flow guider, and a third 3D cladding connection point is arranged between the tuyere small sleeve inner barrel and the flange. The blast furnace tuyere can greatly prolong the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting, in particular to a high-durability blast furnace tuyere small sleeve. Background Art

[0002] The iron-making or steel-making blast furnace conveys hot air into the blast furnace through the blast furnace tuyere installed on it to provide oxygen to meet the needs of smelting pig iron. The blast furnace tuyere used as the inner tuyere is close to the blast furnace combustion zone with a higher temperature (1700℃). The blast furnace tuyere must withstand the influence of thermal radiation and convection in the combustion zone, as well as the wear of the descending logistics, the abrasion of the injected coal powder, the scouring of the combustion products and airflow, as well as the splashing of iron slag and the melting of the iron flow. The blast furnace tuyere is very easy to be damaged under such harsh conditions. Therefore, the service life of the blast furnace tuyere will directly affect the operation cycle, product output and economic benefits of the iron-making blast furnace.

[0003] The tuyere sleeve of a blast furnace is an important process component for air supply and coal injection in an iron-making blast furnace. The tuyere sleeve is rapidly worn due to the wear of coke particles and furnace charge rotating at high speed in the cyclotron zone of the blast furnace and the wear of the front end and outer wall of the tuyere by the slag skin falling off. The service life of the blast furnace tuyere sleeve is sharply reduced. When the furnace condition is not smooth or the skin falls off, the blast furnace tuyere sleeve is severely worn. The copper of the front end of 25mm is worn off in less than 1 month of use. Under normal circumstances, the blast furnace tuyere sleeve should be used for more than 6 months. The existing technology to solve the wear of the tuyere sleeve mainly relies on surfacing welding of wear-resistant high nickel-chromium alloy. However, due to the poor thermal conductivity of the surfacing layer, it is easy to crack and peel off, resulting in poor use effect and short service life. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a high-durability blast furnace tuyere small sleeve, aiming to solve the technical problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A high-durability blast furnace tuyere sleeve comprises a tuyere sleeve outer cylinder, a tuyere sleeve inner cylinder arranged inside the tuyere sleeve outer cylinder, and flanges located at the outer ends of the tuyere sleeve outer cylinder and the outer ends of the tuyere sleeve inner cylinder, a flow chamber is formed between the tuyere sleeve outer cylinder and the tuyere sleeve inner cylinder, a cooling water deflector for guiding the flow of cooling water is arranged in the flow chamber, the flange is cast from pure copper material, the tuyere sleeve outer cylinder is formed by hot extrusion of pure copper material, and the tuyere sleeve inner cylinder is formed by hot extrusion of pure copper material. The cylinder is cast with stainless steel material, the cooling water deflector is welded with carbon steel material, the inner cylinder of the tuyere sleeve is respectively connected with the outer cylinder of the tuyere sleeve, the cooling water deflector and the flange by 3D cladding technology, a first 3D cladding connection point is provided between the inner cylinder of the tuyere sleeve and the outer cylinder of the tuyere sleeve, a second 3D cladding connection point is provided between the inner cylinder of the tuyere sleeve and the cooling water deflector, and a third 3D cladding connection point is provided between the inner cylinder of the tuyere sleeve and the flange.

[0007] According to one aspect of the above technical solution, a water inlet pipe is provided in the flow chamber, a water inlet and a water outlet respectively connected to the water inlet pipe and the flow chamber are penetrated through the flange, and an outlet chamber is formed between the flange and the cooling water deflector.

[0008] According to one aspect of the above technical solution, the outer cylinder of the tuyere sleeve includes a cylinder body and a closing portion connected to the cylinder body away from the flange, the closing portion is integrally connected to the inner end of the inner cylinder of the tuyere sleeve, and the cooling water deflector includes a first annular baffle plate, a second annular baffle plate, and a third annular baffle plate which are arranged in sequence from the closing portion toward the water outlet, and the first annular baffle plate, the second annular baffle plate, and the third annular baffle plate are connected by a separating sleeve.

[0009] According to one aspect of the above technical solution, a first vortex water chamber is formed between the first annular baffle plate and the closed portion, a second vortex water chamber is formed between the second annular baffle plate and the first annular baffle plate, a third vortex water chamber is formed between the third annular baffle plate and the second annular baffle plate, a reciprocating flow water chamber is formed between the separating sleeve and the inner cylinder of the air outlet sleeve, and a first notch connecting the third vortex water chamber and the reciprocating flow water chamber is provided on the separating sleeve.

[0010] According to one aspect of the above technical solution, a second notch is provided on the third annular baffle plate to connect the reciprocating water chamber and the outlet chamber.

[0011] According to one aspect of the above technical solution, the first 3D cladding connection point is located at the inner cylinder of the tuyere sleeve at the outlet chamber, and the second 3D cladding connection point is located at the inner cylinder of the tuyere sleeve close to the first annular baffle plate.

[0012] According to one aspect of the above technical solution, both ends of the inner cylinder of the tuyere sleeve are penetrated, and the inner cylinder of the tuyere sleeve forms a vent for conveying hot air.

[0013] According to one aspect of the above technical solution, one end of the water inlet pipe away from the flange is connected to the first cyclone water chamber.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, the outer cylinder and flange of the tuyere small sleeve are formed by hot extrusion of pure copper material, the inner cylinder of the tuyere small sleeve is cast by stainless steel material, and the cooling water guide is welded by carbon steel material. At the same time, all components are connected by 3D cladding technology. This design structure can avoid sand holes and sand marks that appear during the casting of cast copper cavity blast furnace tuyere and cast copper cross-flow blast furnace tuyere. The body wall is smooth, which reduces the wear of descending logistics, the abrasion of coal powder injection, the scouring of combustion products and airflow, and greatly reduces the degree of damage. Moreover, the wear-resistant layer is very thin and has good thermal conductivity. The heat is quickly conducted and dissipated, which greatly improves the service life of the blast furnace tuyere. After actual use, the service life of the blast furnace tuyere can reach more than 10 months, reducing the number of replacement and maintenance times of the blast furnace tuyere, ensuring the normal production of the blast furnace, so it has good use value and economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of a high-durability blast furnace tuyere small sleeve in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of part A;

[0018] Figure 3 for Figure 1 A magnified view of part B;

[0019] Figure 4 for Figure 1 Front view of the middle flange

[0020] Description of main component symbols:

[0021]

[0022]

[0023] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] See also Figures 1 to 4 , shown is a high-durability blast furnace tuyere sleeve in an embodiment of the utility model, comprising a tuyere sleeve outer cylinder 10, a tuyere sleeve inner cylinder 20 arranged inside the tuyere sleeve outer cylinder 10, and a flange 50 located at the outer end of the tuyere sleeve outer cylinder 10 and the outer end of the tuyere sleeve inner cylinder 20, a flow chamber is formed between the tuyere sleeve outer cylinder 10 and the tuyere sleeve inner cylinder 20, a cooling water deflector 30 for guiding the flow of cooling water is provided in the flow chamber, the flange 50 is cast from pure copper material, the tuyere sleeve outer cylinder 10 is formed by hot extrusion of pure copper material, and the tuyere The small sleeve inner cylinder 20 is cast with stainless steel material, the cooling water deflector 30 is welded with carbon steel material, the tuyere small sleeve inner cylinder 20 is respectively connected with the tuyere small sleeve outer cylinder 10, the cooling water deflector 30 and the flange 50 by 3D cladding technology, a first 3D cladding connection point 61 is provided between the tuyere small sleeve inner cylinder 20 and the tuyere small sleeve outer cylinder 10, a second 3D cladding connection point 62 is provided between the tuyere small sleeve inner cylinder 20 and the cooling water deflector 30, and a third 3D cladding connection point 63 is provided between the tuyere small sleeve inner cylinder 20 and the flange 50.

[0028] It can be understood that the outer cylinder 10 and flange 50 of the tuyere sleeve of the utility model are made of pure copper material by hot extrusion, the inner cylinder 20 of the tuyere sleeve is cast by stainless steel material, and the cooling water deflector 30 is welded by carbon steel material. At the same time, all components are connected by 3D cladding technology. This design structure can avoid sand holes and sand marks that appear during the casting of cast copper cavity blast furnace tuyere and cast copper cross-flow blast furnace tuyere. The body wall is smooth, which reduces the wear of descending logistics, the abrasion of coal powder spraying, the scouring of combustion products and airflow, and greatly reduces the degree of damage. Moreover, the wear-resistant layer is very thin and has good thermal conductivity. The heat is quickly conducted and dissipated, which greatly improves the service life of the blast furnace tuyere. After actual use, the service life of the blast furnace tuyere can reach more than 10 months, reducing the number of replacement and maintenance times of the blast furnace tuyere, and ensuring the normal production of the blast furnace. Therefore, it has good use value and economic value.

[0029] Specifically, a water inlet pipe 21 is provided in the flow chamber, and a water inlet 51 and a water outlet 52 which are respectively connected to the water inlet pipe 21 and the flow chamber are penetrated on the flange 50, and an outlet chamber 22 is formed between the flange 50 and the cooling water deflector 30; the end of the water inlet pipe 21 away from the flange 50 is connected to the first vortex water chamber 35; the outer cylinder 10 of the tuyere sleeve includes a cylinder body 11, a closing portion 12 connected to the side of the cylinder body 11 away from the flange 50, and the closing portion 12 is integrally connected with the inner end of the inner cylinder 20 of the tuyere sleeve, and the cooling water deflector 30 includes a first annular baffle plate 31 which is sequentially arranged from the closing portion 12 toward the water outlet 52 , a second annular baffle plate 32, and a third annular baffle plate 33, the first annular baffle plate 31, the second annular baffle plate 32, and the third annular baffle plate 33 are connected by a separating sleeve 34; a first vortex water chamber 35 is formed between the first annular baffle plate 31 and the closed portion 12, a second vortex water chamber 36 is formed between the second annular baffle plate 32 and the first annular baffle plate 31, a third vortex water chamber 37 is formed between the third annular baffle plate 33 and the second annular baffle plate 32, a reciprocating water chamber 38 is formed between the separating sleeve 34 and the inner cylinder 20 of the tuyere sleeve, and a first notch 71 is provided on the separating sleeve 34 to connect the third vortex water chamber 37 and the reciprocating water chamber 38.

[0030] It can be understood that in this embodiment, a water inlet 51 and a water outlet 52 are provided on the surface of the flange 50, wherein the water inlet 51 is directly connected to the water inlet pipe 21, and the cooling water enters the flow chamber and is introduced into the first vortex water chamber 35 by the water inlet pipe 21, and then the cooling water spirally flows from the first vortex water chamber 35 into the second vortex water chamber 36, and the cooling water spirally flows in the second vortex water chamber 36 into the third vortex water chamber 37, and finally flows from the first notch 71 on the separation sleeve 34 to the round-trip vortex water chamber. The cooling water spirally flows in the first vortex water chamber 35 to cool the outer cylinder 10 of the tuyere sleeve, the inner cylinder 20 of the tuyere sleeve, and the closing portion 12, and the spiral flow in the second vortex water chamber 36 and the third vortex water chamber 37 can cool the outer cylinder 10 of the tuyere sleeve, and the spiral flow in the round-trip vortex water chamber can cool the inner cylinder 20 of the tuyere sleeve.

[0031] Furthermore, the third annular baffle plate 33 is provided with a second notch 72 connecting the reciprocating water chamber 38 and the outlet chamber 22 .

[0032] It can be understood that after the cooling water is cooled in the vortex water chamber, it flows out to the outlet chamber 22 through the second notch 72. The spiral flow of the cooling water in the outlet chamber 22 can cool the outer cylinder 10 of the tuyere sleeve and the inner cylinder 20 of the tuyere sleeve close to the flange 50, and finally flows out from the water outlet 52.

[0033] Preferably, the first 3D cladding connection point 61 is located at the outlet chamber 22 of the inner cylinder 20 of the tuyere sleeve, and the second 3D cladding connection point 62 is located at the inner cylinder 20 of the tuyere sleeve close to the first annular baffle plate 31 .

[0034] It can be understood that in order to achieve better effect of 3D cladding connection, each 3D cladding connection point needs to be evenly arranged, and the position of the third 3D cladding connection point 63 (and between the flange 50 and the inner cylinder 20 of the tuyere sleeve) is fixed. Therefore, the second 3D cladding connection point 62 is arranged on the inner cylinder 20 of the tuyere sleeve close to the first annular baffle to ensure the stability of the other end of the blast furnace tuyere sleeve, and then the first 3D cladding connection point 61 is arranged at the outlet chamber 22 to ensure the stability of the middle part of the blast furnace tuyere sleeve.

[0035] Furthermore, two ends of the inner cylinder 20 of the tuyere sleeve are penetrated, and the inner cylinder 20 of the tuyere sleeve forms a vent 40 for conveying hot air.

[0036] In summary, the high-durability blast furnace tuyere small sleeve in the above-mentioned embodiments of the utility model has a service life of more than 10 months, which reduces the number of replacement and maintenance times of the blast furnace tuyere and ensures the normal production of the blast furnace. Therefore, it has good use value and economic value.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A high-durability blast furnace tuyere sleeve, characterized in that: The invention comprises an outer cylinder of a tuyere sleeve, an inner cylinder of a tuyere sleeve arranged inside the outer cylinder of the tuyere sleeve, and flanges located at the outer ends of the outer cylinder of the tuyere sleeve and the outer ends of the inner cylinder of the tuyere sleeve, a flow chamber is formed between the outer cylinder of the tuyere sleeve and the inner cylinder of the tuyere sleeve, a cooling water guide for guiding the flow of cooling water is arranged in the flow chamber, the flange is cast by pure copper material, the outer cylinder of the tuyere sleeve is formed by hot extrusion of pure copper material, and the inner cylinder of the tuyere sleeve is formed by stainless steel The cooling water guide is formed by casting with carbon steel material, the cooling water guide is formed by welding with carbon steel material, the inner cylinder of the tuyere sleeve is respectively connected with the outer cylinder of the tuyere sleeve, the cooling water guide and the flange by adopting 3D cladding technology, a first 3D cladding connection point is provided between the inner cylinder of the tuyere sleeve and the outer cylinder of the tuyere sleeve, a second 3D cladding connection point is provided between the inner cylinder of the tuyere sleeve and the cooling water guide, and a third 3D cladding connection point is provided between the inner cylinder of the tuyere sleeve and the flange.

2. The high-durability blast furnace tuyere sleeve according to claim 1 is characterized in that: A water inlet pipe is arranged in the flow chamber, a water inlet and a water outlet are respectively provided on the flange and are connected with the water inlet pipe and the flow chamber, and an outlet chamber is formed between the flange and the cooling water guide.

3. The high-durability blast furnace tuyere sleeve according to claim 2 is characterized in that: The outer cylinder of the tuyere sleeve includes a cylinder body and a closing portion connected to the cylinder body away from the flange. The closing portion is integrally connected to the inner end of the inner cylinder of the tuyere sleeve. The cooling water deflector includes a first annular baffle plate, a second annular baffle plate, and a third annular baffle plate which are arranged in sequence from the closing portion toward the water outlet. The first annular baffle plate, the second annular baffle plate, and the third annular baffle plate are connected by a separating sleeve.

4. The high-durability blast furnace tuyere sleeve according to claim 3 is characterized in that: A first vortex water chamber is formed between the first annular baffle plate and the closed portion, a second vortex water chamber is formed between the second annular baffle plate and the first annular baffle plate, a third vortex water chamber is formed between the third annular baffle plate and the second annular baffle plate, a reciprocating flow water chamber is formed between the separating sleeve and the inner cylinder of the tuyere sleeve, and a first notch is provided on the separating sleeve to connect the third vortex water chamber and the reciprocating flow water chamber.

5. The high-durability blast furnace tuyere sleeve according to claim 4 is characterized in that: The third annular baffle plate is provided with a second notch communicating with the reciprocating water chamber and the outlet chamber.

6. The high-durability blast furnace tuyere sleeve according to claim 3 is characterized in that: The first 3D cladding connection point is located at the inner cylinder of the tuyere sleeve where the outlet chamber is located, and the second 3D cladding connection point is located at the inner cylinder of the tuyere sleeve near the first annular baffle plate.

7. The high-durability blast furnace tuyere sleeve according to claim 1 is characterized in that: The two ends of the inner cylinder of the tuyere sleeve are penetrated, and the inner cylinder of the tuyere sleeve forms a vent for conveying hot air.

8. The high-durability blast furnace tuyere sleeve according to claim 4 is characterized in that: One end of the water inlet pipe away from the flange is connected to the first cyclone water chamber.

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