CN104673955A - Shut-down heat preservation method for converter - Google Patents
Shut-down heat preservation method for converter Download PDFInfo
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- CN104673955A CN104673955A CN201510098466.4A CN201510098466A CN104673955A CN 104673955 A CN104673955 A CN 104673955A CN 201510098466 A CN201510098466 A CN 201510098466A CN 104673955 A CN104673955 A CN 104673955A
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- oxygen
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- coke
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Abstract
The invention discloses a shut-down heat preservation method for a shut-downconverter. The method comprises steps as follows: (1), 7-9 tons of coke is prepared before converter baking and is ignited with oxygen; (2), a body of the converter is tilted forwards by 50 degrees, the ignited coke is poured into the converter, the body is shaken to a zero position, an oxygen lance is lowered until the head of the oxygen lance is 2.3-2.8 meters higher than the bottom of the converter for oxygen blowing and combustion assistance, the oxygen blowing pressure is controlled in a range of 0.09-0.11Mpa, and the oxygen blowing time is controlled in a range of 9-11 minutes; (3) a converter opening is sealed by a steel plate for heat preservation, the body is shaken forwards to be flat during heat preservation, meanwhile, oxygen is introduced for combustion assistance, the temperature of a converter shell is higher than 100 DEG C during the show-down period, and the temperature of a converter chamber is higher than 400 DEG C before the converter is opened; (4), the head of the oxygen lance is lowered to be 2.3-2.8 meters higher than the bottom of the converter for oxygen blowing and combustion assistance before the converter is opened, the oxygen blowing pressure is controlled in a range of 0.1-0.3Mpa, and the oxygen blowing time is controlled in a range of 9-11 minutes. The method can effectively eliminate the accidents of slag cover falling and occurrence of seams between converter lining bricks caused by sudden cooling and sudden heating of a converter lining and the like, so that the converter can operate safely and stably during the whole converter campaign period.
Description
Technical field
The invention belongs to converter steelmaking field, particularly relate to a kind of converter blowing out heat preserving method.
Background technology
Along with steel market continued downturn, price of steel product is comparatively large with market fluctuation, and iron and steel enterprise is market-oriented, the reasonable arrangement production program.When market demand is less and price of steel product is on the low side, steel production enterprise suitably can compress production capacity.While compression production capacity, enterprise can overhaul according to self needing reasonable arrangement relevant device, and maintenance can cause relative subject production unit to stop production.The main equipment that the present invention relates generally to is converter, and due to market and other related causes, during the whole stove labour of converter, can arrange to overhaul for 3-4 time, each repair time controls at 2-4 days.Because the repair time is relatively partially long, furnace lining affects by rapid heat cycle, causes original slag blanket in stove to come off, notably causes producing gap between backup lining brick.Again during blow-on, backup lining brick easily corrodes and easily leak accident occurs.So be necessary to take a kind of blowing out heat preserving method, solve furnace lining and cause slag blanket to come off because of rapid heat cycle and produce the accidents such as gap between backup lining brick.
Summary of the invention
The object of the present invention is to provide a kind of converter blowing out heat preserving method, the method effectively can solve furnace lining and causes slag blanket to come off because of rapid heat cycle and produce the accidents such as gap between backup lining brick, converter safety and stability direct motion during whole stove is used as a servant.
For achieving the above object, present invention employs following technical scheme:
A kind of converter blowing out heat preserving method, said method comprising the steps of:
1, baker material prepares
Baker material adopts coke, and baker prepares 7-9 ton coke for first 12 hours, with steel scrap bucket splendid attire, is placed on converter platform, ignites with oxygen.
2, furnace operation before blowing out
(1) after spattering slag, in stove, remaining slag is outwelled in stove slag basin;
(2) slowly leaned forward by converter body 50 degree, by the coke ignited in steel scrap bucket, once pour in stove, body of heater shakes to zero-bit;
(3) fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.3-2.8 rice, open oxygen blast atmospheric pressure and control at 0.09-0.11Mpa, oxygen blow duration controls at 9-11 minute.
3, insulation operation
(1) fire door steel plate is sealed, adopt full weld process, guarantee seamless around, ensure to seal fire door;
(2) between soak, body of heater should shake forward flat, and logical comburant oxygen, guarantees that furnace shutdown period casing temperature is higher than 100 DEG C, guarantee that blow-on front furnace temperature is higher than 400 DEG C simultaneously.
4, furnace operation before blow-on
Fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.3-2.8 rice, open oxygen blast atmospheric pressure and control at 0.1-0.3Mpa, oxygen blow duration controls at 9-11 minute.
Preferably, in described step 1, the standby amount of coke of institute is 8 tons.
Preferably, in described step 2 (3), oxygen rifle rifle head is 2.6m apart from furnace bottom height, and open oxygen blast atmospheric pressure and control at 0.10Mpa, oxygen blow duration controlled at 10 minutes.
Preferably, in described step 3 (2), furnace shutdown period casing temperature, higher than 100 DEG C, guarantees that blow-on front furnace temperature is higher than 400 DEG C.
Preferably, in described step 4, oxygen rifle rifle head is 2.6m apart from furnace bottom height, and open oxygen blast atmospheric pressure and control at 0.20Mpa, oxygen blow duration controlled at 10 minutes.
The present invention to be burnt the heat providing furnace insulation to need by utilizing coke, makes full use of the utility appliance such as oxygen rifle, oxygen lance, steel plate, utilizes the means such as comburant oxygen, to reach the object of furnace shutdown period furnace insulation simultaneously.
The present invention has following beneficial effect:
1) effectively ensure furnace shutdown period furnace body temperature, prevent furnace lining from affecting by rapid heat cycle, cause original slag blanket in stove to come off, notably cause producing gap between backup lining brick.
2), when effectively ensureing blow-on again, backup lining brick not easily corrodes.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
Embodiment 1
A kind of converter blowing out heat preserving method, said method comprising the steps of:
1, baker material prepares
Baker material adopts coke, and baker prepares 9 tons of coke in first 12 hours, with steel scrap bucket splendid attire, is placed on converter platform, ignites with oxygen.
2, furnace operation before blowing out
(1) after spattering slag, in stove, remaining slag is outwelled in stove slag basin;
(2) slowly leaned forward by converter body 50 degree, by the coke ignited in steel scrap bucket, once pour in stove, body of heater shakes to zero-bit;
(3) fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.8 meters of, open oxygen blast atmospheric pressure and control at 0.11Mpa, oxygen blow duration controlled at 9 minutes.
3, insulation operation
(1) fire door steel plate is sealed, adopt full weld process, guarantee seamless around, ensure to seal fire door;
(2) between soak, body of heater should shake forward flat, and logical comburant oxygen, guarantees that furnace shutdown period casing temperature is higher than 100 DEG C, guarantee that blow-on front furnace temperature is higher than 400 DEG C simultaneously.
4, furnace operation before blow-on
Fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.8 meters of, open oxygen blast atmospheric pressure and control at 0.3Mpa, oxygen blow duration controlled at 9 minutes.
Embodiment 2
A kind of converter blowing out heat preserving method, said method comprising the steps of:
1, baker material prepares
Baker material adopts coke, and baker prepares 7 tons of coke in first 12 hours, with steel scrap bucket splendid attire, is placed on converter platform, ignites with oxygen.
2, furnace operation before blowing out
(1) after spattering slag, in stove, remaining slag is outwelled in stove slag basin;
(2) slowly leaned forward by converter body 50 degree, by the coke ignited in steel scrap bucket, once pour in stove, body of heater shakes to zero-bit;
(3) fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.3 meters of, open oxygen blast atmospheric pressure and control at 0.09Mpa, oxygen blow duration controlled at 11 minutes.
3, insulation operation
(1) fire door steel plate is sealed, adopt full weld process, guarantee seamless around, ensure to seal fire door;
(2) between soak, body of heater should shake forward flat, and logical comburant oxygen, guarantees that furnace shutdown period casing temperature is higher than 100 DEG C, guarantee that blow-on front furnace temperature is higher than 400 DEG C simultaneously.
4, furnace operation before blow-on
Fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.3 meters of, open oxygen blast atmospheric pressure and control at 0.1Mpa, oxygen blow duration controlled at 11 minutes.
Embodiment 3
A kind of converter blowing out heat preserving method, said method comprising the steps of:
1, baker material prepares
Baker material adopts coke, and baker prepares 8 tons of coke in first 12 hours, with steel scrap bucket splendid attire, is placed on converter platform, ignites with oxygen.
2, furnace operation before blowing out
(1) after spattering slag, in stove, remaining slag is outwelled in stove slag basin;
(2) slowly leaned forward by converter body 50 degree, by the coke ignited in steel scrap bucket, once pour in stove, body of heater shakes to zero-bit;
(3) fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.6 meters of, open oxygen blast atmospheric pressure and control at 0.10Mpa, oxygen blow duration controlled at 10 minutes.
3, insulation operation
(1) fire door steel plate is sealed, adopt full weld process, guarantee seamless around, ensure to seal fire door;
(2) between soak, body of heater should shake forward flat, and logical comburant oxygen, guarantees that furnace shutdown period casing temperature is higher than 100 DEG C, guarantee that blow-on front furnace temperature is higher than 400 DEG C simultaneously.
4, furnace operation before blow-on
Fall rifle oxygen blast combustion-supporting, oxygen rifle is dropped to rifle head and open oxygen apart from furnace bottom height 2.6 meters of, open oxygen blast atmospheric pressure and control at 0.2Mpa, oxygen blow duration controlled at 10 minutes.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, will be understood by those skilled in the art that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. a converter blowing out heat preserving method, said method comprising the steps of:
1) prepare 7-9 ton coke before baker, ignite with oxygen;
2) leaned forward by converter body, by the coke ignited, pour in stove, body of heater shakes to zero-bit, and oxygen rifle is dropped to rifle head combustion-supporting apart from the oxygen blast of furnace bottom height 2.3-2.8 rice, open oxygen blast atmospheric pressure and control at 0.09-0.11Mpa, oxygen blow duration controls at 9-11 minute;
3) fire door is sealed insulation, between soak, body of heater shakes forward flat, simultaneously logical comburant oxygen, and furnace shutdown period casing temperature is higher than 100 DEG C, and blow-on front furnace temperature is higher than 400 DEG C;
4), before blow-on, oxygen rifle is dropped to rifle head combustion-supporting apart from the oxygen blast of furnace bottom height 2.3-2.8 rice, open oxygen blast atmospheric pressure and control at 0.1-0.3Mpa, oxygen blow duration controls at 9-11 minute.
2. method according to claim 1, is characterized in that, described step 1) in, amount of coke is 8 tons.
3. method according to claim 1, is characterized in that, described step 2) in, converter body is leaned forward 50 degree.
4. method according to claim 1, is characterized in that, described step 2) in, oxygen rifle rifle head is 2.6m apart from furnace bottom height, and open oxygen blast atmospheric pressure and control at 0.10Mpa, oxygen blow duration controlled at 10 minutes.
5. method according to claim 1, is characterized in that, described step 3) in, adopt full weld process to seal fire door steel plate.
6. method according to claim 1, is characterized in that, described step 4) in, oxygen rifle rifle head is 2.6m apart from furnace bottom height, and open oxygen blast atmospheric pressure and control at 0.20Mpa, oxygen blow duration controlled at 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510098466.4A CN104673955B (en) | 2015-03-05 | 2015-03-05 | A kind of converter blowing out heat preserving method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510098466.4A CN104673955B (en) | 2015-03-05 | 2015-03-05 | A kind of converter blowing out heat preserving method |
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| CN104673955A true CN104673955A (en) | 2015-06-03 |
| CN104673955B CN104673955B (en) | 2016-11-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419052A (en) * | 2017-07-14 | 2017-12-01 | 新疆八钢铁股份有限公司 | The furnace drying method after fire proof material of furnace lining is changed in 120t converters |
| CN108660276A (en) * | 2017-03-29 | 2018-10-16 | 鞍钢股份有限公司 | Converter cooling and secondary blow-in method |
| CN112410503A (en) * | 2020-11-17 | 2021-02-26 | 山东钢铁股份有限公司 | Converter mouth plugging method |
| CN113667791A (en) * | 2021-08-23 | 2021-11-19 | 攀钢集团攀枝花钢钒有限公司 | Heat preservation method for metallurgical converter |
| CN114196796A (en) * | 2021-12-06 | 2022-03-18 | 山西太钢不锈钢股份有限公司 | Method for thermally replacing furnace bottom of high-flow top-bottom combined blowing converter |
| CN115109886A (en) * | 2022-07-11 | 2022-09-27 | 广东韶钢松山股份有限公司 | Heat preservation method for long-time shutdown of converter |
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| GB1134699A (en) * | 1965-01-07 | 1968-11-27 | Quigley Co | Improvements in or relating to metallurgical converter furnaces |
| JPS55138014A (en) * | 1979-04-11 | 1980-10-28 | Nippon Steel Corp | Method of repairing steel outlet port at converter |
| CN2756639Y (en) * | 2004-11-11 | 2006-02-08 | 鞍钢集团新钢铁有限责任公司 | Heat insulation device for repairing steel-smelting furnace lining |
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2015
- 2015-03-05 CN CN201510098466.4A patent/CN104673955B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1134699A (en) * | 1965-01-07 | 1968-11-27 | Quigley Co | Improvements in or relating to metallurgical converter furnaces |
| JPS55138014A (en) * | 1979-04-11 | 1980-10-28 | Nippon Steel Corp | Method of repairing steel outlet port at converter |
| CN2756639Y (en) * | 2004-11-11 | 2006-02-08 | 鞍钢集团新钢铁有限责任公司 | Heat insulation device for repairing steel-smelting furnace lining |
Non-Patent Citations (2)
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| 周宇杰 等: "邯钢5_高炉热风炉保温实践", 《2008年中小高炉炼铁学术年会论文集》 * |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660276A (en) * | 2017-03-29 | 2018-10-16 | 鞍钢股份有限公司 | Converter cooling and secondary blow-in method |
| CN108660276B (en) * | 2017-03-29 | 2019-10-29 | 鞍钢股份有限公司 | Converter cooling and secondary blow-in method |
| CN107419052A (en) * | 2017-07-14 | 2017-12-01 | 新疆八钢铁股份有限公司 | The furnace drying method after fire proof material of furnace lining is changed in 120t converters |
| CN112410503A (en) * | 2020-11-17 | 2021-02-26 | 山东钢铁股份有限公司 | Converter mouth plugging method |
| CN113667791A (en) * | 2021-08-23 | 2021-11-19 | 攀钢集团攀枝花钢钒有限公司 | Heat preservation method for metallurgical converter |
| CN114196796A (en) * | 2021-12-06 | 2022-03-18 | 山西太钢不锈钢股份有限公司 | Method for thermally replacing furnace bottom of high-flow top-bottom combined blowing converter |
| CN115109886A (en) * | 2022-07-11 | 2022-09-27 | 广东韶钢松山股份有限公司 | Heat preservation method for long-time shutdown of converter |
| CN115109886B (en) * | 2022-07-11 | 2023-10-20 | 广东韶钢松山股份有限公司 | Heat preservation method for long-time shutdown of converter |
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| CN104673955B (en) | 2016-11-23 |
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