CN104673955B - A kind of converter blowing out heat preserving method - Google Patents
A kind of converter blowing out heat preserving method Download PDFInfo
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- CN104673955B CN104673955B CN201510098466.4A CN201510098466A CN104673955B CN 104673955 B CN104673955 B CN 104673955B CN 201510098466 A CN201510098466 A CN 201510098466A CN 104673955 B CN104673955 B CN 104673955B
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- blowing out
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Abstract
The invention discloses a kind of converter blowing out heat preserving method, said method comprising the steps of: 1) prepare 79 tons of coke before baker, ignite with oxygen；2) converter body is leaned forward 50 degree, the coke that will ignite, to pour in stove, body of heater shakes to zero-bit, oxygen rifle drops to the oxygen blast at furnace bottom height 2.3 2.8 meters of rifle head combustion-supporting, opens oxygen blast atmospheric pressure and control at 0.09 0.11Mpa, and oxygen blow duration controlled at 9 11 minutes；3) fire door steel plate being sealed insulation, during insulation, body of heater shakes forward flat, leads to comburant oxygen simultaneously, and during blowing out, 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 dropping to the oxygen blast at furnace bottom height 2.3 2.8 meters of rifle head combustion-supporting, open oxygen blast atmospheric pressure and control at 0.1 0.3Mpa, oxygen blow duration controlled at 9 11 minutes.The method can effectively 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, makes converter safety and stability direct motion during whole stove labour.
Description
Technical field
The invention belongs to pneumatic 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 relatively big with market fluctuation, and iron and steel enterprise is market-oriented,
The reasonable arrangement production schedule.When market demand is less and price of steel product is on the low side, steel production enterprise can suitably be pressed
Contracting production capacity.While compression production capacity, enterprise can overhaul according to self needing reasonable arrangement relevant device, inspection
Repair and relative subject can be caused to produce equipment stopping production.The main equipment that the invention mainly relates to is converter, due to market and
Other related causes, during the whole stove of converter is used as a servant, can arrange to overhaul for 3-4 time, and each repair time controls at 2-4
My god.Owing to the repair time is the longest, furnace lining is affected by rapid heat cycle, and in causing stove, original slag blanket comes off, notably
Cause producing between backup lining brick gap.Again during blow-on, backup lining brick easily corrodes and leak accident easily occurs.Must so having
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 between backup lining brick, produce seam
The accidents such as gap.
Summary of the invention
It is an object of the invention to provide a kind of converter blowing out heat preserving method, the method can effectively solve furnace lining because of chilling
Anxious heat causes slag blanket to come off and produces the accidents such as gap between backup lining brick, and during making whole stove labour, converter safety and stability is suitable
OK.
For reaching above-mentioned purpose, 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 uses coke, baker within first 12 hours, to prepare 7-9 ton coke, contain with steel scrap bucket, be 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) converter body is slowly leaned forward 50 degree, the coke that will ignite in steel scrap bucket, once pour in stove, stove
Body shakes to zero-bit；
(3) fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.3-2.8 rice, open oxygen blast gas
Stress control is at 0.09-0.11MPa, and oxygen blow duration controlled at 9-11 minute.
3, insulation operation
(1) fire door steel plate is sealed, use full weld to process, it is ensured that the most seamless, it is ensured that to seal fire door；
(2) during insulation, body of heater should shake forward flat, leads to comburant oxygen, it is ensured that during blowing out, casing temperature is higher than simultaneously
100 DEG C, it is ensured that blow-on front furnace temperature is higher than 400 DEG C.
4, furnace operation before blow-on
Fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.3-2.8 rice, open oxygen blast atmospheric pressure
Controlling at 0.1-0.3MPa, oxygen blow duration controlled 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 away from furnace bottom height, opens oxygen blast atmospheric pressure and controls
At 0.10MPa, oxygen blow duration controlled at 10 minutes.
Preferably, in described step 3 (2), during blowing out, casing temperature is higher than 100 DEG C, it is ensured that blow-on front furnace
Temperature is higher than 400 DEG C.
Preferably, in described step 4, oxygen rifle rifle head is 2.6m away from furnace bottom height, opens oxygen blast atmospheric pressure and controls 0.20
MPa, oxygen blow duration controlled at 10 minutes.
The present invention by utilize coke burning provide furnace insulation need heat, make full use of oxygen rifle, oxygen lance,
The auxiliary equipments such as steel plate, utilize the means such as comburant oxygen simultaneously, to reach the purpose of furnace insulation during blowing out.
The method have the advantages that
1) blowing out during furnace body temperature is effectively ensured, prevents furnace lining from being affected by rapid heat cycle, original slag blanket in causing stove
Come off, notably cause producing between backup lining brick gap.
2), when again blow-on is effectively ensured, backup lining brick is difficult to corrode.
Detailed description of the invention
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 uses coke, baker within first 12 hours, to prepare 9 tons of coke, contain with steel scrap bucket, is placed on converter and puts down
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) converter body is slowly leaned forward 50 degree, the coke that will ignite in steel scrap bucket, once pour in stove, stove
Body shakes to zero-bit；
(3) fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.8 meters, open oxygen blast air pressure
Power controls at 0.11MPa, and oxygen blow duration controlled at 9 minutes.
3, insulation operation
(1) fire door steel plate is sealed, use full weld to process, it is ensured that the most seamless, it is ensured that to seal fire door；
(2) during insulation, body of heater should shake forward flat, leads to comburant oxygen, it is ensured that during blowing out, casing temperature is higher than simultaneously
100 DEG C, it is ensured that blow-on front furnace temperature is higher than 400 DEG C.
4, furnace operation before blow-on
Fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.8 meters, opens oxygen blast atmospheric pressure and controls
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 uses coke, baker within first 12 hours, to prepare 7 tons of coke, contain with steel scrap bucket, is placed on converter and puts down
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) converter body is slowly leaned forward 50 degree, the coke that will ignite in steel scrap bucket, once pour in stove, stove
Body shakes to zero-bit；
(3) fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.3 meters, open oxygen blast air pressure
Power controls at 0.09MPa, and oxygen blow duration controlled at 11 minutes.
3, insulation operation
(1) fire door steel plate is sealed, use full weld to process, it is ensured that the most seamless, it is ensured that to seal fire door；
(2) during insulation, body of heater should shake forward flat, leads to comburant oxygen, it is ensured that during blowing out, casing temperature is higher than simultaneously
100 DEG C, it is ensured that blow-on front furnace temperature is higher than 400 DEG C.
4, furnace operation before blow-on
Fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.3 meters, opens oxygen blast atmospheric pressure and controls
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 uses coke, baker within first 12 hours, to prepare 8 tons of coke, contain with steel scrap bucket, is placed on converter and puts down
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) converter body is slowly leaned forward 50 degree, the coke that will ignite in steel scrap bucket, once pour in stove, stove
Body shakes to zero-bit；
(3) fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.6 meters, open oxygen blast air pressure
Power controls at 0.10MPa, and oxygen blow duration controlled at 10 minutes.
3, insulation operation
(1) fire door steel plate is sealed, use full weld to process, it is ensured that the most seamless, it is ensured that to seal fire door；
(2) during insulation, body of heater should shake forward flat, leads to comburant oxygen, it is ensured that during blowing out, casing temperature is higher than simultaneously
100 DEG C, it is ensured that blow-on front furnace temperature is higher than 400 DEG C.
4, furnace operation before blow-on
Fall rifle oxygen blast is combustion-supporting, oxygen rifle drops to rifle head and opens oxygen at furnace bottom height 2.6 meters, opens oxygen blast atmospheric pressure and controls
At 0.2MPa, oxygen blow duration controlled at 10 minutes.
It should be noted last that, above example is only in order to illustrate technical scheme and unrestricted.Although
With reference to embodiment, the present invention is described in detail, it will be apparent to an ordinarily skilled person in the art that the present invention
Technical scheme modify or equivalent, without departure from the spirit and scope of technical solution of the present invention, it is equal
Should contain in the middle of scope of the presently claimed 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) converter body is leaned forward, the coke that will ignite, to pour in stove, body of heater shakes to zero-bit, and oxygen rifle is dropped to rifle
Head oxygen blast at furnace bottom height 2.3-2.8 rice is combustion-supporting, opens oxygen blast atmospheric pressure and controls at 0.09-0.11MPa, oxygen blow duration
Control at 9-11 minute；
3) fire door sealing insulation, during insulation, body of heater shakes forward flat, leads to comburant oxygen simultaneously, furnace shell during blowing out
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 the oxygen blast at furnace bottom height 2.3-2.8 rice of rifle head combustion-supporting, open oxygen blast atmospheric pressure control
System is at 0.1-0.3MPa, and oxygen blow duration controlled at 9-11 minute.
Method the most according to claim 1, it is characterised in that described step 1) in, amount of coke is 8 tons.
Method the most according to claim 1, it is characterised in that described step 2) in, before converter body
Incline 50 degree.
Method the most according to claim 1, it is characterised in that described step 2) in, oxygen rifle rifle head is away from stove
End height is 2.6m, opens oxygen blast atmospheric pressure and controls at 0.10MPa, and oxygen blow duration controlled at 10 minutes.
Method the most according to claim 1, it is characterised in that described step 3) in, by fire door steel plate
Use full weld to process to seal.
Method the most according to claim 1, it is characterised in that described step 4) in, oxygen rifle rifle head is away from stove
End height is 2.6m, opens oxygen blast atmospheric pressure and controls at 0.20MPa, and oxygen blow duration controlled at 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510098466.4A CN104673955B (en) | 2015-03-05 | 2015-03-05 | A kind of converter blowing out heat preserving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510098466.4A CN104673955B (en) | 2015-03-05 | 2015-03-05 | A kind of converter blowing out heat preserving method |
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| Publication Number | Publication Date |
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| CN104673955A CN104673955A (en) | 2015-06-03 |
| CN104673955B true CN104673955B (en) | 2016-11-23 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660276B (en) * | 2017-03-29 | 2019-10-29 | 鞍钢股份有限公司 | A kind of converter is let cool 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 |
| CN112410503B (en) * | 2020-11-17 | 2022-05-17 | 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 |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3351460A (en) * | 1965-01-07 | 1967-11-07 | Quigley Co | Method for prolonging the life of refractory linings in furnaces of the kaldo, linz-donowitz, de may or basic or acid converter types |
| 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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