CN111378800A - Method for randomly adjusting air inlet area of blast furnace tuyere - Google Patents
Method for randomly adjusting air inlet area of blast furnace tuyere Download PDFInfo
- Publication number
- CN111378800A CN111378800A CN201811651460.5A CN201811651460A CN111378800A CN 111378800 A CN111378800 A CN 111378800A CN 201811651460 A CN201811651460 A CN 201811651460A CN 111378800 A CN111378800 A CN 111378800A
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- CN
- China
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- phi
- tuyere
- blast furnace
- air inlet
- inner diameter
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a method for randomly adjusting the air inlet area of a blast furnace air inlet, 1) making a small-end air inlet bushing with an inner diameter phi 100mm in advance for standby, 2) during the production of a blast furnace, generally installing the small air inlet bushing with an inner diameter phi 125mm or phi 120mm, if the air inlet area needs to be reduced during the operation of the blast furnace, installing the air inlet bushing with an inner diameter phi 100mm, 3) if the air inlet area needs to be continuously adjusted to 0.259 square meter, before installing the air inlet bushing, cutting the small end of the air inlet bushing by a brick cutting machine by 10mm, changing the inner diameter of the air inlet bushing from phi 100mm to phi 105mm, 4) cutting the small end of the bushing by 10mm according to the different requirements of the air inlet area of the blast furnace, thereby changing the inner diameter of the air inlet bushing into phi 105mm, phi 110mm, phi 115mm, phi 120mm, 125mm and the like, the method is suitable for different requirements of blast furnace operation and meets the requirement of blast furnace production.
Description
Technical Field
The invention relates to a method for randomly adjusting the air inlet area of a blast furnace tuyere.
Background
When the blast area of the former eight-steel new area A, B, C blast furnace needs to be adjusted, the tuyere small sleeve is replaced by frequently utilizing the damping down opportunity. For example, the tuyere small sleeve with the inner diameter phi 125mm is replaced by the tuyere small sleeve with the diameter phi 120mm or phi 115mm, so as to adjust the air inlet area of the blast furnace tuyere and meet the operation requirement of the blast furnace. However, the adjustment operation is complicated and the labor intensity of workers is high.
Disclosure of Invention
The invention aims to provide a method for randomly adjusting the air inlet area of a blast furnace tuyere, which can randomly adjust and change the air inlet area of the tuyere along with the production requirement of the blast furnace and is convenient for the blast furnace to adjust the operation system in time.
The invention aims to realize the method, which can randomly adjust the air inlet area of the blast furnace tuyere, and comprises the following steps of 1) manufacturing a tuyere lining with a small end and an inner diameter phi 100mm in advance for later use, wherein the tuyere lining is in a conical cylinder shape; the shape and length of the tuyere lining are matched with the inner diameter of the tuyere small sleeve;
2) when the blast furnace is produced, the tuyere small sleeve is generally provided with a tuyere small sleeve with the inner diameter phi 125mm or phi 120mm, the air inlet area of the blast furnace is respectively 0.368 square meter and 0.339 square meter, if the air inlet area needs to be reduced in the blast furnace operation, a tuyere lining with the inner diameter phi 100mm is additionally arranged, so that the air inlet inner diameter of the tuyere is changed from phi 120mm to phi 100mm, and the air inlet area of the blast furnace is correspondingly reduced to 0.236 square meter;
3) if the blast furnace needs to continuously adjust the air inlet area to 0.259 square meters, before the tuyere lining is installed, a brick cutting machine is used for cutting off the small end of the tuyere lining by 10mm, and the inner diameter of the tuyere lining is changed from phi 100mm to phi 105mm, so that the operation requirement of the blast furnace is met;
4) according to the different demands of blast furnace air inlet area, use the brick cutting machine to cut off 10mm length with the tuyere bush stub in proper order, can change the tuyere bush internal diameter into phi 105mm, phi 110mm, phi 115mm, phi 120mm, phi 125mm and so on the tuyere small jacket of different internal diameter sizes, adapt to the different demands of blast furnace operation, satisfy blast furnace production.
The invention adopts high-temperature high-strength wear-resistant ceramic castable to manufacture and additionally install a tuyere lining capable of adjusting the air inlet diameter, and the performance indexes of the high-temperature high-strength wear-resistant ceramic castable are that the refractoriness is more than or equal to 1790 ℃, AL2O3 is more than or equal to 70%, the bulk density is more than or equal to 2.75g/cm3, the breaking strength is 110 ℃, × 24h is more than or equal to 12MPa, 1400 ℃ × 3h is more than or equal to 14MPa, the compressive strength is 110 ℃, × 24h is more than or equal to 50MPa, 1400 × 3h is more than or equal to 150MPa, the line change after burning is 1400 × 3h +/-0.1%, the safe use temperature is 1500 ℃, and the tuyere lining can be randomly adjusted according to the production needs of a blast furnace to change.
Compared with the prior art, the method does not need to replace the tuyere small sleeve, and the tuyere lining is directly installed in after the blowpipe is disassembled. The invention reduces the operation time and improves the work efficiency, and the invention does not need the operation step of pulling out and reinstalling the tuyere small sleeve, thereby greatly accelerating the operation progress. The danger source is few: only two kinds of high-temperature materials and coal gas exist, the danger is low, and personal injury safety accidents are not easy to happen. Only tuyere stock of one or two internal diameter sizes, e.g., phi 125mm, phi 120mm, needs to be stocked. Reduce the reserve volume and occupy less fund amount.
Detailed Description
A method for adjusting the air intake area of a blast furnace tuyere at will, 1) making a tuyere lining with a small end diameter phi 100mm for standby in advance, wherein the tuyere lining is in a conical cylinder shape; the shape and length of the tuyere lining are matched with the inner diameter of the tuyere small sleeve;
2) when the blast furnace is produced, the tuyere small sleeve is generally provided with a tuyere small sleeve with the inner diameter phi 125mm or phi 120mm, the air inlet area of the blast furnace is respectively 0.368 square meter and 0.339 square meter, if the air inlet area needs to be reduced in the blast furnace operation, a tuyere lining with the inner diameter phi 100mm is additionally arranged, so that the air inlet inner diameter of the tuyere is changed from phi 120mm to phi 100mm, and the air inlet area of the blast furnace is correspondingly reduced to 0.236 square meter;
3) if the blast furnace needs to continuously adjust the air inlet area to 0.259 square meters, before the tuyere lining is installed, a brick cutting machine is used for cutting off the small end of the tuyere lining by 10mm, and the inner diameter of the tuyere lining is changed from phi 100mm to phi 105mm, so that the operation requirement of the blast furnace is met;
4) according to the different demands of blast furnace air inlet area, use the brick cutting machine to cut off 10mm length with the tuyere bush stub in proper order, can change the tuyere bush internal diameter into phi 105mm, phi 110mm, phi 115mm, phi 120mm, phi 125mm and so on the tuyere small jacket of different internal diameter sizes, adapt to the different demands of blast furnace operation, satisfy blast furnace production.
Claims (1)
1. A method for adjusting the air intake area of a blast furnace tuyere at will is characterized in that 1) a tuyere lining with a small end and an inner diameter phi 100mm is manufactured in advance for standby application, and the tuyere lining is in a conical cylinder shape; the shape and length of the tuyere lining are matched with the inner diameter of the tuyere small sleeve;
2) when the blast furnace is produced, the tuyere small sleeve is generally provided with a tuyere small sleeve with the inner diameter phi 125mm or phi 120mm, the air inlet area of the blast furnace is respectively 0.368 square meter and 0.339 square meter, if the air inlet area needs to be reduced in the blast furnace operation, a tuyere lining with the inner diameter phi 100mm is additionally arranged, so that the air inlet inner diameter of the tuyere is changed from phi 120mm to phi 100mm, and the air inlet area of the blast furnace is correspondingly reduced to 0.236 square meter;
3) if the blast furnace needs to continuously adjust the air inlet area to 0.259 square meters, before the tuyere lining is installed, a brick cutting machine is used for cutting off the small end of the tuyere lining by 10mm, and the inner diameter of the tuyere lining is changed from phi 100mm to phi 105mm, so that the operation requirement of the blast furnace is met;
4) according to the different demands of blast furnace air inlet area, use the brick cutting machine to cut off 10mm length with the tuyere bush stub in proper order, can change the tuyere bush internal diameter into phi 105mm, phi 110mm, phi 115mm, phi 120mm, phi 125mm and so on the tuyere small jacket of different internal diameter sizes, adapt to the different demands of blast furnace operation, satisfy blast furnace production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811651460.5A CN111378800A (en) | 2018-12-31 | 2018-12-31 | Method for randomly adjusting air inlet area of blast furnace tuyere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811651460.5A CN111378800A (en) | 2018-12-31 | 2018-12-31 | Method for randomly adjusting air inlet area of blast furnace tuyere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111378800A true CN111378800A (en) | 2020-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811651460.5A Pending CN111378800A (en) | 2018-12-31 | 2018-12-31 | Method for randomly adjusting air inlet area of blast furnace tuyere |
Country Status (1)
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| CN (1) | CN111378800A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340209A (en) * | 1981-04-13 | 1982-07-20 | Kaiser Steel Corporation | Adjustable tuyere |
| CN102234696A (en) * | 2010-04-21 | 2011-11-09 | 重庆钢铁(集团)有限责任公司 | Method of increasing air quantity when blast furnace blows in without damping down |
| CN102605123A (en) * | 2011-12-09 | 2012-07-25 | 秦皇岛首秦金属材料有限公司 | Method for controlling smelting intensity of blast furnace by using air inlet linings |
| CN102994676A (en) * | 2012-12-20 | 2013-03-27 | 武钢集团昆明钢铁股份有限公司 | Small wear-resistant bush for blast-furnace tuyere and manufacture method thereof |
| CN206721241U (en) * | 2017-04-21 | 2017-12-08 | 重庆钢铁(集团)有限责任公司 | A kind of blast furnace tuyere small sleeve |
| CN108359760A (en) * | 2017-10-24 | 2018-08-03 | 新疆八钢铁股份有限公司 | Large blast furnace maintains the operating procedure of direct motion using low-heat state strength coke |
-
2018
- 2018-12-31 CN CN201811651460.5A patent/CN111378800A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340209A (en) * | 1981-04-13 | 1982-07-20 | Kaiser Steel Corporation | Adjustable tuyere |
| CN102234696A (en) * | 2010-04-21 | 2011-11-09 | 重庆钢铁(集团)有限责任公司 | Method of increasing air quantity when blast furnace blows in without damping down |
| CN102605123A (en) * | 2011-12-09 | 2012-07-25 | 秦皇岛首秦金属材料有限公司 | Method for controlling smelting intensity of blast furnace by using air inlet linings |
| CN102994676A (en) * | 2012-12-20 | 2013-03-27 | 武钢集团昆明钢铁股份有限公司 | Small wear-resistant bush for blast-furnace tuyere and manufacture method thereof |
| CN206721241U (en) * | 2017-04-21 | 2017-12-08 | 重庆钢铁(集团)有限责任公司 | A kind of blast furnace tuyere small sleeve |
| CN108359760A (en) * | 2017-10-24 | 2018-08-03 | 新疆八钢铁股份有限公司 | Large blast furnace maintains the operating procedure of direct motion using low-heat state strength coke |
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Application publication date: 20200707 |
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