CN1995405A - Treatment method for removing bonded steel slag at maintenance fire hole of top-bottom combined blown converter - Google Patents
Treatment method for removing bonded steel slag at maintenance fire hole of top-bottom combined blown converter Download PDFInfo
- Publication number
- CN1995405A CN1995405A CN 200610135137 CN200610135137A CN1995405A CN 1995405 A CN1995405 A CN 1995405A CN 200610135137 CN200610135137 CN 200610135137 CN 200610135137 A CN200610135137 A CN 200610135137A CN 1995405 A CN1995405 A CN 1995405A
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- China
- Prior art keywords
- converter
- oxygen
- fire door
- slag
- bonded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000002893 slag Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 title abstract description 14
- 239000010959 steel Substances 0.000 title abstract description 14
- 238000012423 maintenance Methods 0.000 title abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000001301 oxygen Substances 0.000 claims abstract description 57
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 239000003818 cinder Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000000523 sample Substances 0.000 abstract description 3
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 239000002699 waste material Substances 0.000 abstract 2
- 238000004140 cleaning Methods 0.000 description 3
- 230000004523 agglutinating effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a treatment method for removing bonded steel slag at a maintenance furnace mouth of a steelmaking top-bottom combined blown converter, belonging to the ferrous metallurgy converter maintenance technology. The technical problem to be solved is as follows: aiming at the problem that the converter mouth is bonded with steel slag in the oxygen blowing smelting of a combined blowing converter, the caliber of the converter mouth is continuously reduced, so that the smelting production operation of the converter is influenced, waste steel is clamped at the converter mouth when waste steel is added into the converter, a sublance for testing cannot be normally carried out, and the sublance and a testing probe are damaged occasionally. The invention adopts the technical scheme that: blowing oxygen into the converter mouth at high temperature of the converter, so that the bonded steel slag and the bonded iron-containing material at the converter mouth contact with the oxygen to react, the bonded slag tissue structure is damaged, the bonded slag tissue structure is melted and peeled off, the bonded steel slag and the bonded iron-containing material are separated from the lining of the converter mouth, the converter mouth of the converter is kept stable, and the oxygen blowing operation parameters are selected according to the size of the converter. If the top-bottom combined blown converter of 260t maintains the converter mouth and removes the bonded steel slag, the removal is completed in 4 minutes, the removal is thorough, the converter mouth is stabilized, and the guarantee is provided for improving the operation rate of the converter and increasing the yield.
Description
Technical field
The present invention relates to a kind of steel-making top and bottom combined blown converter, particularly relate to the treatment process that combined blown converter is safeguarded fire door removing bonding slag, belong to ferrous metallurgy steel-making top and bottom combined blown converter maintenance technology.
Background technology
The steel-making top and bottom combined blown converter, in converting process owing to fluctuateed by hot metal composition, the influence that furnace bottom thickness increases, the oxygen blast slag making, seethe in the molten bath, slag is excessive, often produce slag and be bonded in fire door and inwall thereof, the result makes fire door dwindle gradually, so that it is interrupted in the steel-making operation, as steel scrap often takes place when adding steel scrap and be stuck in the fire door place, sublance thermometric in the converting process, auxiliary lance probe withstands on the fire door place during sampling because of the fire door bore dwindles, cause the sublance damage accident, therefore, have to call disassembling furnace machine temporarily and skim, enlarge the fire door bore, the result both the treatment time long, be difficult to thoroughly remove the bonding slag again, this is the problem that puzzlement steel-making converter explained hereafter must not solve for a long time before the present invention did not finish.
At present, the way one that solves is by the labor cleaning usually, and because of converter high temperature, environment is difficult to artificial near operation, and the labor cleaning can not finish; The 2nd, adopt lifting machine lift heavy thing bump fire door agglutinating slag, it is low not only to handle accuracy rate, weak effect, holding time is long, and cause the damage equipment accident easily, another kind of processing mode is to use custom-designed mechanical means, it is converter slag scavenger, remove fire door bonding slag, as Chinese invention patent, application number: 00110979.0 discloses a kind of title " converter slag scavenger ", and it is that the bonding slag that utilizes a kind of mechanical means to solve fire door is removed, and its formation is to be finished by the scarfing cinder head of 2 or a shovel of 3 hydro-cylinder support and connection shape.Its main deficiency is: rotary furnace body must be stopped at level orientation in the scarfing cinder process, cleaning plant must be contained on operation level land or the platform, and the removing treatment time is long, be difficult in several minutes, finish, incur loss through delay and produce, prolong the converter smelting cycle, can not satisfy and smelt the needs of producing.
Summary of the invention
The technical problem to be solved in the present invention is in the prior art, exist top and bottom combined blown converter fire door bonding slag to fail in time to remove, the converter mouth internal diameter dwindles gradually, so that influence converter smelting, production operation is obstructed, and when adding pan feeding or steel scrap, fire door blocks steel scrap, fire door withstands test probe during the sublance test, so that the sublance accident that is damaged.The invention provides a kind of fire door of safeguarding and remove the treatment process of bonding slag, the technical scheme that solves is, at containing metallic iron in converter mouth agglutinating slag and the adhesive, under the converter hot conditions, be blown into oxygen, metallic iron contacts the weave construction that reflection destroys fire door bonding slag or adhesive with oxygen, make the fusing of fire door bonding slag and peel off and break away from the refractory materials of its fire door liner, keep stablizing the fire door internal diameter.Top and bottom combined blown converter is safeguarded the treatment process of fire door removing bonding slag, carries out as follows:
1, the converter mouth bonding slag state during monitoring observation is smelted, fire door bonding slag dwindles bore to the limit value that harms the converter operation, and OnNow oxygen blast scarfing cinder is handled;
2, converter ordinary production finishing blowing, mobile oxygen rifle is to handling " waiting a little ";
3, adjust oxygen gun blowing scarfing cinder operation: set oxygen flow, pressure, select oxygen rifle control mode;
4, manual mode: open nitrogen envelope valve and the oxygen rifle fallen and be positioned at oxygen blast scarfing cinder rifle position, manual unlocking oxygen valve;
5, adjust oxygen gun blowing scarfing cinder scope of activity rifle position up and down, oxygen blast makes oxygen jet impact each position of bonding slag in the fire door in the fire door inwall;
6, oxygen blast is to the adhesive and the oxygen contact reacts of all containing metal iron of fire door bonding slag, and adhesive and the fusing of bonding slag are peeled off, and break away from the fire door inner lining refractory, and timing is closed oxygen, carried rifle, and the scarfing cinder processing finishes.
The present invention has following beneficial effect compared to existing technology:
1, the present invention removes fire door bonding slag, can utilize existing equipment to finish in the extremely short time, and the trouble that provides special scarfing cinder equipment to bring is provided, and has both saved and has taken the place, stokehold, saves facility investment again;
2, treatment process provided by the invention is removed fire door slag and adhesive, and the processing efficiency height is thorough again, and processing speed is fast, finishes within the several minutes; Effective, finish under the converter production normal running, do not add pan feeding and steel scrap influencing converter, guarantee the proper testing of sublance.
3, treatment process provided by the invention, overcome in the production often because of fire door bonding slag, the equipment breakdown that bore reduces to cause is many, be difficult to guarantee personal safety, solved and safeguarded that the fire door internal diameter is in standard state, for smelting cycle is shortened in converter, equipment guarantee is provided, improve converter production output and converter operating rate, 260t converter can improve 11.2 ten thousand tons of the annual production of steel, and the converter operating rate improves 5%.
Embodiment
Realize the specific embodiment of the present invention, preferred embodiment 260t top and bottom combined blown converter implements to safeguard the treatment process of fire door removing bonding slag.Below in conjunction with embodiment, described in detail:
Treatment process provided by the invention, the technical scheme and the measure that solve are: at 260t top and bottom combined blown converter fire door bonding slag or contain the adhesive of metallic iron, blow again under the hot conditions in converter, be blown into oxygen, metallic iron contacts with oxygen and reacts, destroy the weave construction of fire door bonding slag or iron content adhesive, make its fusing and peel off or break away from the refractory materials of its fire door liner, keep the fire door internal diameter stable.Safeguard the treatment process of fire door removing bonding slag, carry out as follows:
1, the 260t converter mouth bonding slag state during monitoring observation is smelted, between fire door bonding slag and scrap box one side, less than 150mm, perhaps to reach 300-400mm thick for fire door inwall bonding slag layer at revolution axial line place, and tissue starts removes the bonding slag with oxygen blown converter mouth mode;
2, bessemerize end, mobile oxygen rifle is to handling " waiting a little ";
3, adjust the oxygen rifle operation that slag is removed in oxygen blast, comprising: the oxygen flow set point adjustment is 50000Nm
3/ h, oxygen rifle control mode are selected " maintenance ";
4, manual mode of operation: open nitrogen envelope valve, the oxygen rifle is fallen the position to 20500mm rifle position, open to the oxygen blown oxygen valve of fire door inwall;
5, manual setting oxygen rifle is adjusted the bonding slag position that oxygen jet impacts the fire door inwall in 20000mm to 21000mm motion between the limit of rifle position up and down;
6, oxygen blast is to fire door bonding slag or contain adhesive and the oxygen contact reacts of metallic iron, and adhesive and slag fusing are peeled off, and break away from the fire door inner lining refractory, and oxygen blast 4 minutes is closed oxygen, carried rifle, and the scarfing cinder processing finishes.
The operation oxygen gun blowing is removed the bonding slag, and oxygen flow is selected to set by the converter size.260t top and bottom combined blown converter set(ting)value is elected 50000Nm as
3/ h, oxygen blast clocking value are 4 minutes.
Claims (2)
1, a kind of top and bottom combined blown converter is safeguarded the treatment process of fire door removing bonding slag, carries out as follows:
(1), the converter mouth bonding slag state of monitoring observation in smelting, fire door bonding slag dwindles bore to the limit value that harms the converter operation, OnNow oxygen blast scarfing cinder is handled;
(2), converter ordinary production finishing blowing, mobile oxygen rifle is to handling " waiting a little ";
(3), adjust oxygen gun blowing scarfing cinder operation: set oxygen flow, pressure, select oxygen rifle control mode;
(4), manual mode: open nitrogen envelope valve and the oxygen rifle fallen and be positioned at oxygen blast scarfing cinder rifle position, manual unlocking oxygen valve;
(5), adjust oxygen gun blowing scarfing cinder scope of activity rifle position up and down, oxygen blast makes oxygen jet impact each position of bonding slag in the fire door in the fire door inwall;
(6), oxygen blast is to adhesive and the oxygen contact reacts of all containing metal iron of fire door bonding slag, adhesive and the fusing of bonding slag are peeled off, and break away from the fire door inner lining refractory, close oxygen, carry rifle by clocking value, scarfing cinder processing end.
2, fire door according to claim 1 is removed the treatment process of bonding slag, it is characterized in that operating parameters oxygen flow and pressure by converter size selection setting, and 260t top and bottom combined blown converter set(ting)value is elected 50000Nm as
3/ h, oxygen blast clocking value 4 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101351373A CN100463976C (en) | 2006-12-28 | 2006-12-28 | Treatment method for removing bonded steel slag at maintenance fire hole of top-bottom combined blown converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101351373A CN100463976C (en) | 2006-12-28 | 2006-12-28 | Treatment method for removing bonded steel slag at maintenance fire hole of top-bottom combined blown converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1995405A true CN1995405A (en) | 2007-07-11 |
| CN100463976C CN100463976C (en) | 2009-02-25 |
Family
ID=38250606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101351373A Expired - Fee Related CN100463976C (en) | 2006-12-28 | 2006-12-28 | Treatment method for removing bonded steel slag at maintenance fire hole of top-bottom combined blown converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100463976C (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984087A (en) * | 2010-11-18 | 2011-03-09 | 马鞍山钢铁股份有限公司 | Slag liquefaction heating process and device |
| CN101684986B (en) * | 2008-09-25 | 2011-11-16 | 攀钢集团钢铁钒钛股份有限公司 | Maintenance method of gas permeable brick of vanadium extraction converter and production method of converter vanadium extraction |
| CN103215407A (en) * | 2013-04-23 | 2013-07-24 | 邯钢集团邯宝钢铁有限公司 | Method for cleaning dry slag of assistant muzzle by flame at converter mouth |
| CN105256092A (en) * | 2015-10-26 | 2016-01-20 | 攀钢集团攀枝花钢钒有限公司 | Treating method for bonding substances at converter opening of semi-steel smelting converter |
| CN105506217A (en) * | 2016-01-22 | 2016-04-20 | 河北钢铁股份有限公司邯郸分公司 | Method for online rapid cleaning of converter lance bonded steel slag |
| CN106367557A (en) * | 2016-09-09 | 2017-02-01 | 河钢股份有限公司邯郸分公司 | Method for treating converter mouth slag through oxygen blowing by oxygen lance |
| CN106591531A (en) * | 2016-12-09 | 2017-04-26 | 河钢股份有限公司承德分公司 | Method for preventing converter oxygen lances from adhering to steel slag |
| CN108359765A (en) * | 2018-03-30 | 2018-08-03 | 山东钢铁股份有限公司 | A kind of blowing method for purging converter mouth dry slag |
| CN108842026A (en) * | 2018-08-21 | 2018-11-20 | 成渝钒钛科技有限公司 | The method for improving steel-making vanadium extraction rate |
| CN109576445A (en) * | 2018-11-27 | 2019-04-05 | 唐山钢铁集团有限责任公司 | The method for cleaning of RH lower channel and alloy feed opening dross |
| CN110117690A (en) * | 2019-06-11 | 2019-08-13 | 首钢京唐钢铁联合有限责任公司 | Method for purging dephosphorization trunnion sleeve steel |
| CN112226568A (en) * | 2020-09-18 | 2021-01-15 | 包头钢铁（集团）有限责任公司 | Production control method for preventing sublance top furnace mouth |
| CN114015829A (en) * | 2021-10-20 | 2022-02-08 | 阳春新钢铁有限责任公司 | Method for cleaning slag adhered on converter cap |
| CN115386674A (en) * | 2022-08-02 | 2022-11-25 | 湖南华菱涟源钢铁有限公司 | Method for removing converter mouth slagging |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002332513A (en) * | 2001-05-09 | 2002-11-22 | Kobe Steel Ltd | Method for removing metal on nose of melting vessel furnace |
-
2006
- 2006-12-28 CN CNB2006101351373A patent/CN100463976C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684986B (en) * | 2008-09-25 | 2011-11-16 | 攀钢集团钢铁钒钛股份有限公司 | Maintenance method of gas permeable brick of vanadium extraction converter and production method of converter vanadium extraction |
| CN101984087A (en) * | 2010-11-18 | 2011-03-09 | 马鞍山钢铁股份有限公司 | Slag liquefaction heating process and device |
| CN101984087B (en) * | 2010-11-18 | 2012-07-04 | 马鞍山钢铁股份有限公司 | Slag liquefaction heating process and device |
| CN103215407A (en) * | 2013-04-23 | 2013-07-24 | 邯钢集团邯宝钢铁有限公司 | Method for cleaning dry slag of assistant muzzle by flame at converter mouth |
| CN105256092A (en) * | 2015-10-26 | 2016-01-20 | 攀钢集团攀枝花钢钒有限公司 | Treating method for bonding substances at converter opening of semi-steel smelting converter |
| CN105506217A (en) * | 2016-01-22 | 2016-04-20 | 河北钢铁股份有限公司邯郸分公司 | Method for online rapid cleaning of converter lance bonded steel slag |
| CN106367557A (en) * | 2016-09-09 | 2017-02-01 | 河钢股份有限公司邯郸分公司 | Method for treating converter mouth slag through oxygen blowing by oxygen lance |
| CN106591531A (en) * | 2016-12-09 | 2017-04-26 | 河钢股份有限公司承德分公司 | Method for preventing converter oxygen lances from adhering to steel slag |
| CN108359765A (en) * | 2018-03-30 | 2018-08-03 | 山东钢铁股份有限公司 | A kind of blowing method for purging converter mouth dry slag |
| CN108842026A (en) * | 2018-08-21 | 2018-11-20 | 成渝钒钛科技有限公司 | The method for improving steel-making vanadium extraction rate |
| CN109576445A (en) * | 2018-11-27 | 2019-04-05 | 唐山钢铁集团有限责任公司 | The method for cleaning of RH lower channel and alloy feed opening dross |
| CN110117690A (en) * | 2019-06-11 | 2019-08-13 | 首钢京唐钢铁联合有限责任公司 | Method for purging dephosphorization trunnion sleeve steel |
| CN112226568A (en) * | 2020-09-18 | 2021-01-15 | 包头钢铁（集团）有限责任公司 | Production control method for preventing sublance top furnace mouth |
| CN114015829A (en) * | 2021-10-20 | 2022-02-08 | 阳春新钢铁有限责任公司 | Method for cleaning slag adhered on converter cap |
| CN114015829B (en) * | 2021-10-20 | 2023-01-13 | 阳春新钢铁有限责任公司 | Method for cleaning slag adhered on converter cap |
| CN115386674A (en) * | 2022-08-02 | 2022-11-25 | 湖南华菱涟源钢铁有限公司 | Method for removing converter mouth slagging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100463976C (en) | 2009-02-25 |
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