CN106702072B - A kind of Blowing Converter method that full stove labour bottom rifle is visual - Google Patents
A kind of Blowing Converter method that full stove labour bottom rifle is visual Download PDFInfo
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- CN106702072B CN106702072B CN201510789309.8A CN201510789309A CN106702072B CN 106702072 B CN106702072 B CN 106702072B CN 201510789309 A CN201510789309 A CN 201510789309A CN 106702072 B CN106702072 B CN 106702072B
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Abstract
The present invention provides a kind of Blowing Converter method that full stove labour bottom rifle is visual, bottom rifle brick is changed to blind brick, furnace bottom lining brick and bottom rifle brick thickness increase by 200~600mm；45~55 stoves smelt steel grade selection straight carbon steel before the new new blow-on of converter for building backup lining brick by laying bricks or stones；2~4, the bottom rifle in two trunnion directions is first installed；Few slag is taken to splash soon, the mode of mending carries out furnace lining maintenance to few slag soon；Every eight hours at least primary to kiln lining thickness measuring with calibrator, it is ensured that no less than 2 visible bottom blowing element air ports；It establishes and blows visible situation and lining wear situation archives per furnace bottom；The maximum furnace life that can keep safely blowing again using economic campaign life.The present invention realizes that converter full stove labour bottom rifle is visual efficiently to be blown again, effectively clean steel and can slow down the erosion of furnace lining, promote harmful element phosphorus, the removing of sulphur and the reduction of manganese element, reduce the consumption of flux and alloy.
Description
Technical field
The invention belongs to process for making technical fields, and in particular to a kind of to keep turning for bottom rifle whole course visible within the stove labour phase
Stove blows method again.
Background technology
Converter top-bottom blowing metallurgical technology promoted and applied in the industry since 1980, since it combines top blast, bottom
The strong point of both sides is blown, existing converter is transformed in addition and is easy, only several years begin to universal in the whole world.Some countries such as day
This, has eliminated simple top-blown method.Since converter lining protection technology by slag splashing promotes and applies, the converter lining life in China increases substantially.
Also promote the development that blowing technology is answered in China simultaneously.Iron and Steel Research Geueral Inst and domestic large iron and steel enterprise the cooperation, " longevity of exploitation
Combined blown converter smelting technique (LCB) ", has had reached the world lead level for blowing field of steel-making again.Wuhan Iron and Steel Plant two is made steel 90 tons and is blown again
After converter application " long-lived combined blown converter smelting technique (LCB) ", world's combined blown converter most blast furnace for creating 15208 stoves in 1999
Age notes down, and increases year by year, more creates within 2003 29942 stove new records.In above-mentioned stove labour, blow again than having reached 100%, eventually
Point Molten Steel Cleanliness has obtained raising by a relatively large margin, and combined blown converter endpoint molten steel [C] [O] product value is 0.0028, reaches state
Border advanced level.
Although top-bottom blowing metallurgical technology rapidly develops, bottom lance life how is improved, is carried out in the world
Nearly research work in 20 years but fails always to obtain important breakthrough.In order to solve converter long-lived furnace life and bottom lance life
Relatively low contradiction uses following technical measures in the world：(1) sacrifice and blow again, protect furnace life：Since bottom lance life fails
It is synchronous to improve, it causes to be blown again than significantly declining (≤20%), is forced to abolish combined blowing process.(2) sacrifice furnace life, guarantor blows again：It blows again
Technique can guarantee steel quality, therefore abandon splashing slag technique.(3) quick-replaceable bottom-blowing air feed element technology is used：Japan is using few
The efficient converter producing technology of slag melting, average furnace life reach 5000 stoves, replace a bottom-blowing air feed element therebetween, and guarantee is blown again
Than >=90%.The 255 tons of converters of U.S. big lake steel mill use Technology of Slag Splashingfor Furnace Maintenance, and furnace life is made to reach 10000 stoves or more.It is multiple to ensure
Effect is blown, the technology of a quick-replaceable bottom-blowing air feed element is carried out using every 2000 stove.
It is above-mentioned blow control method again all and be stove labour during bottom rifle (covered, to make with clinker using recessive invisible bottom rifle
Bottom rifle is invisible), by dynamic control furnace bottom thickness come control blow again effect full stove labour blow method again, since bottom rifle can not
See, the control that the effect blown again cannot be stablized, and blows effect again and compare far from blowing effect with visual the answering of bottom rifle.
Invention content
The present invention provides a kind of Blowing Converter method that full stove labour bottom rifle is visual, and the purpose is to keep the air port of bottom blowing element
It is visual always in the converter entire stove labour phase, so that bottom blown gas directly, is efficiently stirred and turn molten steel in the stove, on the one hand effectively drops
The oxidisability of low converter molten steel terminal oxygen value and clinker, clean steel and the erosion for slowing down furnace lining；On the other hand improve power
Condition promotes harmful element phosphorus, the removing of sulphur and the reduction of manganese element, to reduce the consumption of flux and alloy.
For this purpose, the technical solution that the present invention is taken is：
A kind of Blowing Converter method that full stove labour bottom rifle is visual, specific method are：
(1) the bottom rifle brick for building converter bottom by laying bricks or stones is all changed to the solid blind brick in no bottom rifle hole；
(2) thickness of furnace bottom lining brick and bottom rifle brick is increased by 200~600mm；
(3) 45~55 stoves before the new new blow-on of converter for building backup lining brick by laying bricks or stones, smelt steel grade and select straight carbon steel, and avoid molten steel mistake
Oxidation；
(4) after 50~100 stove of converter smelting, the online hot swap of bottom rifle is carried out；Using the quick hot swap bottom blowing of lossless furnace bottom
The method of element installs 2~4, the bottom rifle in two trunnion directions at first；The method of the lossless quick hot swap bottom blowing element of furnace bottom,
Before boring bottom rifle, ensure original thickness of slag layer, without changing furnace bottom operation；Drill bit is got near Slag Layer, drilling is interrupted, with burning
Oxygen mode handles remaining Slag Layer, with drilling machine that the processing of slag blanket hole is round and smooth after grilling thoroughly, and ensures outside drilling and bottom blowing element
Diameter has the plus tolerance of 1mm, then installs bottom blowing element, first-class pad brick, tamped bottom rifle with the gap around drilling with Martin's sand,
It seals；Stove uses as a servant the prometaphase, when the bottom blowing element that head batch uses has the air port thickness of resistance to material to be less than 500mm or is less than furnace bottom average thickness
When the when 150~200mm or stove labour latter stage bottom blowing element air port thickness of resistance to material is less than 500mm, the bottom blowing element is closed, is replaced
Sit for an examination in place of another person the bottom rifle that generation closes in bottom near tapping side slag line；Stove uses as a servant mid-term, replaces the furnace bottom thicker part of non-trunnion and slag lining
Bottom blowing element substitute and need to close the bottom blowing element of furnace bottom area of rising；Stove uses as a servant the later stage, and it is higher to replace the furnace bottom that calibrator is measured
The bottom blowing element in orientation substitutes the bottom blowing element for needing to close the furnace bottom area that rises；
(5) few slag is taken to splash soon, the mode of mending carries out furnace lining maintenance to few slag soon；Few slag is splashed after i.e. tapping soon according to clinker
Situation outwells 1/2~1/3 clinker, then splashes slag, and slag effect is splashed in raising；Few slag is mended i.e. in the way of slag fettling bottom soon to stove
Safeguarded that before slag is mended, 1/2 slag is stayed in converter, firmly splashes dystectic clinker in furnace bottom by slag mode of splashing stage by stage in bottom
And segment position, reduce the erosion of furnace bottom；
(6) every eight hours it is at least primary to kiln lining thickness measuring with calibrator, it is ensured that no less than 2 visible bottom blowing element air ports,
Dynamic adjustment catch carbon rifle position, furnace bottom decline, and catch carbon standard rifle position improves 50~100mm；Furnace bottom rising, catch carbon standard rifle position reduce
50~100mm maintains the dynamic equilibrium of converter bottom thickness；
(7) use economic campaign life that can keep the maximum furnace life blown again safely, the thickness of resistance to material is less than 500mm at air port
Bottom blowing element quantity be more than 1/3, it is seen that bottom blowing element air port be less than 2 when, carry out plan blowing out.
Beneficial effects of the present invention are：
By using blind brick, it is therefore prevented that bottom brick deviates, and condition is created to be smoothed out bottom rifle hot swap；Pass through early period
Strengthen lining brick sintering operation technology, avoids the rapid erosion of stove labour initial stage lining brick, the dynamic equilibrium loss of furnace lining；Pass through nothing
The technology of the quick hot swap bottom blowing element of furnace bottom is damaged, single bottom blowing element service life is enhanced about more than once；Splashed soon by few slag,
The mode of mending carries out furnace lining maintenance to few slag soon, the dynamic equilibrium loss of furnace bottom, visual to realize the full stove labour bottom rifle of converter
It efficiently blows again, effectively reduces the oxidisability of converter molten steel terminal oxygen value and clinker, clean steel and the erosion for slowing down furnace lining；Together
Shi Youli promotes harmful element phosphorus, the removing of sulphur and the reduction of manganese element, reduces the consumption of flux and alloy, this is metallurgical boundary
It is pioneering in terms of full stove labour blows research again.
Specific implementation mode
With 260 tons of top and bottom combined blown converters, at 0.6 diameter of bottom for evenly distributed 10 bottom blowing elements：
1, bottom rifle brick is all changed to solid blind brick；And by furnace bottom thickness increase 450mm, to make furnace bottom overall thickness by
1100mm increases to 1550mm.
2, new stove uses as a servant preceding 50 stove, smelts steel grade and selects straight carbon steel, forbids Molten Steel over-oxidation, reinforces furnace lining and safeguards and splash slag behaviour
Make, 50 stoves terminate, furnace bottom rising 100mm, and rest part furnace lining does not have erosion, and are sintered good.
3, converter runs 50 stoves, symmetrical to open near trunnion using the method for the quick hot swap bottom blowing element of lossless furnace bottom
Four bottom blowing elements.
4, it splashes slag mode to splash soon using few slag, according to clinker situation after tapping, outwells 1/2~1/3 clinker, then
Slag is splashed, slag effect is splashed in raising.If production interval is longer, few slag is taken to mend soon, furnace bottom is carried out in the way of slag fettling bottom
It safeguards, before slag is mended, 1/2 slag is stayed in converter, is firmly splashed dystectic clinker in furnace bottom and segment by slag mode of splashing stage by stage
Position.
5, every eight hours it is primary to kiln lining thickness measuring with calibrator, in conjunction with manually to the supervision of furnace lining, and ensure to be not less than 2
It can be seen that bottom blowing element air port, dynamic adjusts catch carbon rifle position, and 2 teams and groups are less than for visible bottom blowing element air port on duty, to behaviour
Workmanship carries out performance appraisal.
6, the 1500th stove outputs steel side slag line two bottom blowing elements nearby, closes and corrode more serious bottom blowing element two.The
3500 stoves open positive tapping side and positive iron making side bottom blowing element, simultaneously close off ineffective two bottom blowing elements of correspondence of bottom blowing；
4000 stoves, 4500 stoves, 5000 stoves, 5500 stoves, 6000 stoves and 6500 stoves use bottom blowing element tuyere bottom thickness relatively respectively
Thick bottom blowing element substitutes the bottom blowing element for needing to close the furnace bottom area that rises, and stove labour reaches 7000 stoves, and furnace lining is torn in blowing out open.
Claims (1)
1. a kind of Blowing Converter method that full stove labour bottom rifle is visual, it is characterised in that：
(1) the bottom rifle brick for building converter bottom by laying bricks or stones is all changed to the solid blind brick in no bottom rifle hole；
(2) thickness of furnace bottom lining brick and bottom rifle brick is increased by 200~600mm；
(3) 50 stoves before the new new blow-on of converter for building backup lining brick by laying bricks or stones, smelt steel grade and select straight carbon steel, and avoid Molten Steel over-oxidation；
(4) after 50~100 stove of converter smelting, the online hot swap of bottom rifle is carried out；2~4, the bottom rifle in two trunnion directions is first installed；
The method of the lossless quick hot swap bottom blowing element of furnace bottom ensures original thickness of slag layer before boring bottom rifle, makees without changing furnace bottom
Industry；Drill bit is got near Slag Layer, interrupts drilling, remaining Slag Layer is handled with oxygen mode is burnt, with drilling machine by slag after grilling thoroughly
Layer hole processing is round and smooth, ensures that drilling and bottom blowing element outer diameter have the plus tolerance of 1mm, then installs bottom blowing element, first-class pad brick,
Bottom rifle is tamped with the gap around drilling with Martin's sand, is sealed；Stove uses as a servant the prometaphase, when the bottom blowing element that head batch uses has air port
When the thickness of resistance to material is less than 500mm or is less than furnace bottom 150~200mm of average thickness or stove uses as a servant the resistance to material in latter stage bottom blowing element air port
When thickness is less than 500mm, the bottom blowing element is closed, replaces the bottom rifle that the bottom near tapping side slag line sits for an examination in place of another person generation to close；In stove labour
Phase, the bottom blowing element for replacing the furnace bottom thicker part of non-trunnion and slag lining substitute the bottom blowing member for needing to close the furnace bottom area that rises
Part；Stove uses as a servant the later stage, and the bottom blowing element for replacing the higher orientation of furnace bottom that calibrator is measured substitutes the bottom for needing to close the furnace bottom area that rises
Blow element；
(5) few slag is taken to splash soon, the mode of mending carries out furnace lining maintenance to few slag soon；Few slag is splashed after i.e. tapping soon according to clinker shape
Condition outwells 1/2~1/3 clinker, then splashes slag, and slag effect is splashed in raising；Few slag is mended i.e. in the way of slag fettling bottom soon to furnace bottom
Safeguarded, before slag is mended, 1/2 slag is stayed in converter, by stage by stage splash slag mode dystectic clinker is firmly splashed in furnace bottom and
Segment position；
(6) every eight hours it is at least primary to kiln lining thickness measuring with calibrator, it is ensured that no less than 2 visible bottom blowing element air ports, adjustment
Catch carbon rifle position, furnace bottom decline, and catch carbon standard rifle position improves 50~100mm；Furnace bottom rising, catch carbon standard rifle position reduction by 50~
100mm；
(7) bottom blowing element quantity of the thickness of resistance to material less than 500mm is more than 1/3 at air port, it is seen that bottom blowing element air port is less than 2
When, carry out plan blowing out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510789309.8A CN106702072B (en) | 2015-11-17 | 2015-11-17 | A kind of Blowing Converter method that full stove labour bottom rifle is visual |
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|---|---|---|---|
| CN201510789309.8A CN106702072B (en) | 2015-11-17 | 2015-11-17 | A kind of Blowing Converter method that full stove labour bottom rifle is visual |
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| CN106702072A CN106702072A (en) | 2017-05-24 |
| CN106702072B true CN106702072B (en) | 2018-08-31 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363877A (en) * | 2018-12-25 | 2020-07-03 | 新疆八一钢铁股份有限公司 | Method for prolonging service life of furnace lining of steel-making converter |
| CN110578033B (en) * | 2019-09-24 | 2021-11-23 | 张家港宏昌钢板有限公司 | Converter bottom blowing replacement method |
| CN113249541A (en) * | 2021-04-23 | 2021-08-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Furnace protection method of bottom blowing powder injection converter |
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| CN101338350A (en) * | 2008-08-07 | 2009-01-07 | 武汉钢铁(集团)公司 | Element protection process by bottom-blowing gas supply |
| CN101487070A (en) * | 2009-02-23 | 2009-07-22 | 钢铁研究总院 | Method for improving combined blown converter campaign length by metal furnace cinder composite mushroom |
| CN102399931A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Hot replacement method of bottom blowing element of top-bottom combined blown converter |
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| CN101338350A (en) * | 2008-08-07 | 2009-01-07 | 武汉钢铁(集团)公司 | Element protection process by bottom-blowing gas supply |
| CN101487070A (en) * | 2009-02-23 | 2009-07-22 | 钢铁研究总院 | Method for improving combined blown converter campaign length by metal furnace cinder composite mushroom |
| CN102399931A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Hot replacement method of bottom blowing element of top-bottom combined blown converter |
| CN103451361A (en) * | 2013-08-21 | 2013-12-18 | 山西太钢不锈钢股份有限公司 | Bottom blowing gas supply method for stainless steel converter and stainless steel converter bottom thereof |
| CN104099442A (en) * | 2014-07-16 | 2014-10-15 | 首钢总公司 | Arrangement method for bottom blowing guns of converter and top-bottom combined blowing converter |
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