CN213203096U - Copper-iron alloy tuyere small sleeve - Google Patents
Copper-iron alloy tuyere small sleeve Download PDFInfo
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- CN213203096U CN213203096U CN202022140072.XU CN202022140072U CN213203096U CN 213203096 U CN213203096 U CN 213203096U CN 202022140072 U CN202022140072 U CN 202022140072U CN 213203096 U CN213203096 U CN 213203096U
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Abstract
The utility model discloses a copper-iron alloy tuyere small sleeve, including flange, endotheca, overcoat and divertor, the overcoat cover is established in the endotheca outside, and overcoat rear end and endotheca rear end all with flange fixed connection, its characterized in that: the front cap body is made of copper-iron alloy; the outer sleeve, the flange, the inner sleeve and the front cap body enclose an inner cavity, and the fluid director is arranged in the inner cavity; the front end of the outer sleeve is connected with the front cap body through a first annular welding line, and the front end of the inner sleeve is connected with the front cap body through a second annular welding line; the front end surface of the front cap body forms the front end surface of the copper-iron alloy tuyere small sleeve. The copper-iron alloy tuyere small sleeve has excellent electrical conductivity, thermal conductivity and ductility, improves the strength, wear resistance and corrosion resistance of the copper-iron alloy tuyere small sleeve, and prolongs the service life.
Description
Technical Field
The utility model relates to a blast furnace cooling device, in particular to a copper-iron alloy tuyere small sleeve.
Background
The blast furnace tuyere small sleeve is an important process part for air supply and coal injection of an iron-making blast furnace, hot air with the temperature of more than thousand ℃ can be conveyed into the blast furnace through the tuyere small sleeve, most of the existing tuyere small sleeve is made of pure copper through forging or casting, the existing tuyere small sleeve is in a high-temperature environment with the temperature of more than 1200 ℃, the existing tuyere small sleeve always needs to bear high-temperature scouring of the high-temperature hot air, and is often impacted and scoured by slag iron melt with the temperature of more than 1400 ℃ and high-temperature materials which circularly move at high speed, and the working temperature of the front end part of the tuyere small sleeve is more than 1500 ℃. The blast furnace tuyere small sleeve has the advantages that the front outer wall and the front end of the tuyere small sleeve are rapidly melted, burnt or abraded due to the impact and the scouring of coke particles and furnace materials rotating at a high speed in a blast furnace convolution region and the falling of slag crust, the service life of the tuyere small sleeve is rapidly reduced, when the furnace conditions are not smooth or the slag crust falls, the tuyere small sleeve is seriously abraded, the front end of the tuyere small sleeve is seriously abraded when the blast furnace conditions are not used for 1 month, the tuyere small sleeve is damaged, and the service life is short.
At present, the main measures for relieving the abrasion of the tuyere small sleeve are to weld a wear-resistant alloy, an alloy co-permeation or other alloy surface treatment method and the like on the front end of the tuyere small sleeve, although the methods improve the wear resistance of the front end of the tuyere small sleeve, the heat exchange of the tuyere small sleeve is directly influenced due to the poor heat conductivity of the wear-resistant alloy, the bonding strength of the wear-resistant alloy and the copper tuyere small sleeve is low, the heat conductivity coefficient of the wear-resistant alloy and the copper tuyere small sleeve is low, the expansion coefficient of the wear-resistant alloy and the copper tuyere small sleeve is inconsistent, and the wear-resistant alloy is easy to fall off from the copper tuyere small sleeve or is washed away by slag iron melt in the use process, so.
Disclosure of Invention
The utility model aims to solve the problem of providing a copper-iron alloy tuyere small sleeve. The copper-iron alloy tuyere small sleeve is simple in structure, good in strength, wear resistance and corrosion resistance and long in service life.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
the utility model provides a copper iron alloy tuyere small sleeve, includes flange, endotheca, overcoat and divertor, and the overcoat cover is established in the endotheca outside, and overcoat rear end and endotheca rear end all with flange fixed connection, its characterized in that: the front cap body is made of copper-iron alloy; the outer sleeve, the flange, the inner sleeve and the front cap body enclose an inner cavity, and the fluid director is arranged in the inner cavity; the front end of the outer sleeve is connected with the front cap body through a first annular welding line, and the front end of the inner sleeve is connected with the front cap body through a second annular welding line; the front end surface of the front cap body forms the front end surface of the copper-iron alloy tuyere small sleeve.
Usually, the material of the outer sleeve is copper or copper alloy; the material of the flange and the inner sleeve is copper, copper alloy or steel. The rear end of the outer sleeve is connected with the flange through a third annular welding line. The rear end of the inner sleeve can be connected with the flange through a fourth annular welding line, and the rear end of the inner sleeve can also be integrally connected with the flange.
Generally, the flange is provided with a water inlet and a water outlet, the fluid director divides an inner cavity enclosed by the outer sleeve, the flange, the inner sleeve and the front cap body to form a water cooling channel, and two ends of the water cooling channel are respectively communicated with the water inlet and the water outlet.
The melting point of pure copper is 1083 ℃, so that the molding compound has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance; the melting point of iron is 1538 ℃, and the copper-iron alloy has good electrical conductivity, thermal conductivity and ductility, so that the melting points of copper and iron are not greatly different, copper and iron can be compatible to generate a copper-iron alloy, and the copper-iron alloy combines the advantages of copper and iron, and has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance. Compared with pure copper, the copper-iron alloy can greatly improve the hardness and the wear resistance.
Because the front cap body is positioned at the position which is most prone to failure in the blast furnace, the front cap body made of the copper-iron alloy is used as the front end of the copper-iron alloy tuyere small sleeve, and because iron elements are contained in the copper-iron alloy, slag-iron melt is not prone to corroding the front cap body or being adhered to the front cap body, overlaying operation is not needed to be carried out at the front end of the tuyere small sleeve, so that the copper-iron alloy tuyere small sleeve has excellent electrical conductivity, thermal conductivity and ductility, the strength, the wear resistance and the corrosion resistance of the copper-iron alloy tuyere small sleeve are improved, and the service life is prolonged.
As a preferred scheme of the utility model, the front cap body comprises an annular outer connecting section, an annular front cap front part and an annular inner connecting section, the front end of the annular outer connecting section is integrally connected with the outer edge of the annular front cap front part, and the rear end of the annular outer connecting section is connected with the front end of the outer sleeve through the first annular welding line; the front end of the annular inner connecting section is integrally connected with the inner edge of the front part of the annular front cap, and the rear end of the annular inner connecting section is connected with the front end of the inner sleeve through the second annular welding line. The front end of the outer sleeve retracts backwards, the rear end of the annular outer connecting section extends backwards and is connected with the front end of the outer sleeve, the annular outer connecting section can separate the first annular welding line from furnace materials, and the furnace materials are prevented from directly eroding the first annular welding line when the furnace conditions are not smooth or slag crust falls off. The front end of the inner sleeve retracts backwards, the rear end of the annular inner connecting section extends backwards to be connected with the front end of the inner sleeve, and the annular inner connecting section can separate the second annular welding line from furnace charge, so that the furnace charge is prevented from directly eroding the second annular welding line when the furnace condition is not smooth or slag crust falls off.
As a further preferable scheme of the utility model, the length (i.e. the size in the front and back direction of the copper-iron alloy tuyere small sleeve) range of the annular outer connecting section is 100-200cm, and the length (i.e. the size in the front and back direction of the copper-iron alloy tuyere small sleeve) range of the annular inner connecting section is 50-150 cm.
Compared with the prior art, the utility model, have following advantage:
the copper-iron alloy tuyere small sleeve has excellent electrical conductivity, thermal conductivity and ductility, improves the strength, wear resistance and corrosion resistance of the copper-iron alloy tuyere small sleeve, and prolongs the service life.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the copper-iron alloy tuyere small sleeve in the embodiment includes a flange 1, an inner sleeve 2, an outer sleeve 3, a fluid director 4 and a front cap body 5, wherein the outer sleeve 3 is sleeved outside the inner sleeve 2, and both a rear end 31 of the outer sleeve 3 and a rear end 21 of the inner sleeve 2 are fixedly connected with the flange 1; the front cap body 5 is made of copper-iron alloy; the outer sleeve 3, the flange 1, the inner sleeve 2 and the front cap body 5 enclose an inner cavity 6, and the fluid director 4 is arranged in the inner cavity 6; the front end 32 of the outer sleeve 3 is connected with the front cap body 5 through a first annular welding seam 7, and the front end 22 of the inner sleeve 2 is connected with the front cap body 5 through a second annular welding seam 8; the front end surface 51 of the front cap body 5 forms the front end surface of the copper-iron alloy tuyere small sleeve.
Usually, the material of the outer jacket 3 is copper or a copper alloy; the flange 1 and the inner sleeve 2 are made of copper, copper alloy or steel. The rear end 31 of the jacket 3 is connected to the flange 1 by means of a third circumferential weld 9. The rear end 21 of the inner sleeve 2 can be connected with the flange 1 through the fourth circular welding seam 10, and the rear end 21 of the inner sleeve 2 can also be integrally connected with the flange 1.
Usually, the flange 1 is provided with a water inlet 11 and a water outlet, the fluid director 4 divides an inner cavity 6 enclosed by the outer sleeve 3, the flange 1, the inner sleeve 2 and the front cap body 5 to form a water cooling channel, and two ends of the water cooling channel are respectively communicated with the water inlet 11 and the water outlet.
The front cap body 5 comprises an annular outer connecting section 51, an annular front cap front part 52 and an annular inner connecting section 53, the front end 511 of the annular outer connecting section 51 is integrally connected with the outer edge 521 of the annular front cap front part 52, and the rear end 512 of the annular outer connecting section 51 is connected with the front end 32 of the outer sleeve 3 through a first annular welding seam 7; the front end 531 of the annular inner connecting section 53 is integrally connected with the inner rim 522 of the annular front cap front portion 52, and the rear end 532 of the annular inner connecting section 53 is connected with the front end 22 of the inner sleeve 2 through the second annular weld 8. The front end 32 of the outer sleeve 3 retracts backwards, the rear end of the annular outer connecting section 51 extends backwards and is connected with the front end 32 of the outer sleeve 3, the annular outer connecting section 51 can separate the first annular welding seam 7 from furnace materials, and the furnace materials are prevented from directly eroding the first annular welding seam 7 when the furnace conditions are not smooth or the slag crust falls off. The front end 22 of the inner sleeve 2 retracts backwards, the rear end of the annular inner connecting section 53 extends backwards to be connected with the front end 22 of the inner sleeve 2, and the annular inner connecting section 53 can separate the second annular welding line 8 from furnace charge, so that the furnace charge is prevented from directly eroding the second annular welding line 8 when the furnace condition is not smooth or the slag crust falls off.
The length of the annular outer connecting section 51 (i.e. the dimension in the front-rear direction of the copper-iron alloy tuyere small sleeve) was 120cm, and the length of the annular inner connecting section 53 (i.e. the dimension in the front-rear direction of the copper-iron alloy tuyere small sleeve) was 50 cm.
The melting point of pure copper is 1083 ℃, so that the molding compound has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance; the melting point of iron is 1538 ℃, and the copper-iron alloy has good electrical conductivity, thermal conductivity and ductility, so that the melting points of copper and iron are not greatly different, copper and iron can be compatible to generate a copper-iron alloy, and the copper-iron alloy combines the advantages of copper and iron, and has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance. Compared with pure copper, the copper-iron alloy can greatly improve the hardness and the wear resistance.
Because the front cap body 5 is positioned at the position which is most prone to failure in the blast furnace, the front cap body 5 made of copper-iron alloy is used as the front end of the copper-iron alloy tuyere small sleeve, and because iron elements are contained in the copper-iron alloy, slag-iron melt is not prone to corroding the front cap body 5 or being prone to adhering to the front cap body 5, overlaying operation at the front end of the tuyere small sleeve is not needed, so that the copper-iron alloy tuyere small sleeve has excellent electric conductivity, thermal conductivity and ductility, meanwhile, the strength, the wear resistance and the corrosion resistance of the copper-iron alloy tuyere small sleeve are improved, and the service life is prolonged.
In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (3)
1. The utility model provides a copper iron alloy tuyere small sleeve, includes flange, endotheca, overcoat and divertor, and the overcoat cover is established in the endotheca outside, and overcoat rear end and endotheca rear end all with flange fixed connection, its characterized in that: the front cap body is made of copper-iron alloy; the outer sleeve, the flange, the inner sleeve and the front cap body enclose an inner cavity, and the fluid director is arranged in the inner cavity; the front end of the outer sleeve is connected with the front cap body through a first annular welding line, and the front end of the inner sleeve is connected with the front cap body through a second annular welding line; the front end surface of the front cap body forms the front end surface of the copper-iron alloy tuyere small sleeve.
2. The copper-iron alloy tuyere small sleeve according to claim 1, characterized in that: the front cap body comprises an annular outer connecting section, an annular front cap front part and an annular inner connecting section, the front end of the annular outer connecting section is integrally connected with the outer edge of the annular front cap front part, and the rear end of the annular outer connecting section is connected with the front end of the outer sleeve through the first annular welding line; the front end of the annular inner connecting section is integrally connected with the inner edge of the front part of the annular front cap, and the rear end of the annular inner connecting section is connected with the front end of the inner sleeve through the second annular welding line.
3. The copper-iron alloy tuyere small sleeve according to claim 2, characterized in that: the length range of the annular outer connecting section is 100-200cm, and the length range of the annular inner connecting section is 50-150 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022140072.XU CN213203096U (en) | 2020-09-26 | 2020-09-26 | Copper-iron alloy tuyere small sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022140072.XU CN213203096U (en) | 2020-09-26 | 2020-09-26 | Copper-iron alloy tuyere small sleeve |
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| Publication Number | Publication Date |
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| CN213203096U true CN213203096U (en) | 2021-05-14 |
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| CN202022140072.XU Active CN213203096U (en) | 2020-09-26 | 2020-09-26 | Copper-iron alloy tuyere small sleeve |
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| CN (1) | CN213203096U (en) |
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- 2020-09-26 CN CN202022140072.XU patent/CN213203096U/en active Active
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