CN105296709B - One kind springs up formula molten iron drossing method - Google Patents
One kind springs up formula molten iron drossing method Download PDFInfo
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- CN105296709B CN105296709B CN201410253742.5A CN201410253742A CN105296709B CN 105296709 B CN105296709 B CN 105296709B CN 201410253742 A CN201410253742 A CN 201410253742A CN 105296709 B CN105296709 B CN 105296709B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The present invention provides one kind and springs up formula molten iron drossing method, and two jet guns insert molten iron from hot-metal bottle plan vertical, and two rifle spacing are tank mouth radius 1/2, and insertion position is at the radius of tank mouth 1/2, the 2.5m of insertion depth 0.5；Control air supply intensity >=2NL/ (mint), pressure ＞ 0.7MPa；A jet guns air supply intensity is controlled at 2NL/ (mint), B jet guns air supply intensity to molten iron rolling exposed surface is progressively increased to contact with molten iron tank skin, A rifles are adjusted to again it is identical with B rifle air supply intensities, to molten iron rolling bare area be more than molten iron tank mouth 1/2 when start to skim；End jet gun of skimming is extracted to be continued to be blown more than 30s after molten iron；Jet gun is lifted with hoist, alignment pin is left the 210mm of positioning hole 190, hoist traversing reached to two rifle spacing declines again during tank mouth radius length, alignment pin is fallen into new positioning hole.The present invention can shorten slag-removing time, and sulfur content is returned in converter when effectively reducing iron loss and desulphurization and slag skimming.
Description
Technical field
The invention belongs to hot-metal bottle slag skimming process field, without using poly- after more particularly to a kind of desulfurizing iron, desiliconization, dephosphorization
Slag agent, but the blowing gas formation gush phenomenon from jet gun is utilized, push molten iron tank deck slag to skimming gate, and then be easy to take off
Slag and reduce molten iron loss method.
Background technology
After desulfurizing iron, dephosphorization, desiliconization, to prevent subsequent handling " returning sulphur ", " rephosphorization ", increase metallurgy lime consumption etc. from asking
Topic occurs, it is necessary to which the top slag after dephosphorization, desiliconization and desophorization for hot metal is removed.For top slag is smoothly removed, current Normal practice is the poly- slag of input
Agent, becomes sticky by the top slag of good fluidity, recycles manipulator to concentrate and removes, sometimes because indivedual steel grades are to the tight of sulfur content
Lattice requirement, particularly with pure magnesium powder sulfur removal technology is blown, the dilute amount of slag is small, generally requires repeatedly to put into Slag conglomeration agent.So, not only increase
Plus Slag conglomeration agent consumption, and molten iron can be increased take off damage.Therefore, top slag how quickly, is at low cost removed, especially without using poly-
Slag agent, has huge realistic meaning and economic value for reduction steel technology.
Patent CN03211240.8 provides a kind of hot-metal bottle side blow slag gathering device, and its structure is that centre is porous core, thoroughly
Gaseous core outer layer is refractory masses, adds iron sheet to fix in the outside of refractory masses, and the bottom of slag gathering device is equipped with breather pipe, leads to
Quick connection part is housed, slag gathering device is fixed on the side wall of hot-metal bottle by flange, by side-blown slag gathering device on tracheae,
Inert gas is blown into molten iron, the buoyancy produced by means of gas in molten iron is made after the slag aggregation on molten iron jar liquid surface, then
Reduce iron-holder in its slag by skimming, so as to reach reduction iron loss, reduce the purpose of consumption.But it is saturating that this method is used
Difficulty is built in gaseous core restricted lifetime, increase tank lining cutting, and side-blown positional distance skimming gate is farther out, it is difficult to form effectively poly- to residue
Collection.
Molten iron pot narrow gap gas-blowing slag-removing device and operating procedure disclosed in application number 200710015162.2, the hot-metal bottle are narrow
Seam gas-blowing slag-removing device has one by first hydraulic cylinder and second hydraulic cylinder, the first ultrasonic transformer and the second ultrasonic transformer and turning joint structure
Into mechanical arm, mechanical arm be provided with blowpipe, blowpipe be provided with gas connection pipe and nozzle, nozzle is narrow slit shape nozzle, its grasp
It is as technique:A. gas connection pipe nitrogen tube or air compressor have been connected into first；B. hot-metal bottle is tilted one in position of skimming
Determine after angle, the top of the slag distance of narrow slit shape nozzle and hot-metal bottle is adjusted by amplitude-variable mechanical arm, then pass through narrow slit shape nozzle
To top of the slag nitrogen-blow or compressed air, liquid slag is driven to outside molten iron tank mouth.The narrow slit that this method is used is blown same
It is difficult to ensure that difficulty is built in service life, increase tank lining cutting, and due to some air blowing, top slag can only be blown out " falcate ", bent moon
Two ends top slag, which is removed, still to acquire a certain degree of difficulty.
The blowing slag-removing equipment for molten iron pretreatment that application number 201010272903.7 is provided, is arranged on hot-metal bottle Cinder Machine and puts down
On platform, it includes guide rail, pivoting support, adjustable seats, guide roller, jockey sprocket, lifting drive, lift cart, air blowing
Bar and refractory segment.Guide rail is inclined above hot-metal bottle, and lift cart is arranged on guide rail, and lifting drive is by leading
Moved up and down to chain gear transmission lift cart along guide rail.Pivoting support is connected in the middle part of guide upper, adjustable seats connection guide rail, is led
Guide rail bottom is arranged on to roller, pivoting support and adjustable seats, which are each attached to, skims on machine platform.Inflatable bar is arranged on lifting
On dolly, refractory segment is connected to inflatable bar bottom.When Cinder Machine works, inflatable bar is inserted into nitrogen blowing in ladle.With
The progress for process of skimming, the quantity of slag is constantly reduced, and molten iron exposed surface constantly expands, until slag is almost removed completely.But due to this
The jet gun of method is tilting insertion molten iron, inevitable under natural gravity effect in spite of the effect of guide rail and bearing
Certain amount of deflection is produced, and refractory material only possesses insulation ability, jet gun upper epidermis refractory material is in pulling force effect
Under easily produce micro-crack, molten iron erosive velocity can be accelerated, the service life of jet gun insertion portion can be greatly shortened.
Application number 200520039594.3 discloses a kind of device for removing slag, including job platform, telescoping mechanism, blow slag rifle,
Rotating mechanism, elevating mechanism；Job platform, which is provided with track；Telescoping mechanism, including billy gate, drive mechanism；Activity is small
Car is arranged on the track of job platform, and is connected with drive mechanism；Slag rifle is blown, is arranged on billy gate；By flexible
Mechanism makes to blow slag rifle accurately in place；Rotating mechanism includes motor, and its one end is connected to billy gate, and connection telescoping mechanism is with blowing
Slag rifle, adjustment blows slag rifle gas and is blown into angle；Elevating mechanism includes reversing frame, drive mechanism；Described reversing frame one end activity
Job platform is connected to, its one end is connected to drive mechanism, and described track is arranged on the reversing frame.Pass through spray before skimming
Rifle is blown, the iron ladle lip region that the scum silica frost of ladle Background Region is driven, then is mechanically removed.This method
Jet mode is also tilting insertion, and persistently baking effect is lower it is difficult to ensure that jet gun permanency shape for molten iron below.And should
Spray gun is with can not doing left and right in the horizontal direction mobile, it is difficult to which residue is brought together.
A kind of top blast auxiliary equipment of metallurgical external slag-removing treatment technology disclosed in application number 200620007154.4, by
Source of the gas, pipeline, air jet system are constituted, and source of the gas coupled by pipeline with air jet system, air jet system on metallurgical tank top or
The top spray gun that outside portion is set up.Top spray gun is 1-3 branch, top spray gun or is rotary or is parallel-moving type；Source of the gas or for reproducibility,
Or be neutral or be inert gas.When gas is blown into molten iron, heated gas expands and driven on molten iron rapidly
Gush, cause molten iron face exposed.The jet gun of this method is also tilting insertion molten iron, unavoidably to produce certain amount of deflection, cause
Jet gun upper epidermis refractory material is produced micro-crack under a stretching force, accelerate molten iron and corrode, shorten the jet gun life-span.And
The spray gun can not be moved left and right in the horizontal direction during skimming, so in latter stage of skimming, i.e. level of residue not Football Association's quantity of slag
1/5 when, only rely on increasing air supply intensity be difficult residue is brought together, and air supply intensity exceed certain value after again meeting
Cause the danger of molten iron splash.
The content of the invention
The present invention provides one kind and springs up formula molten iron drossing method, is after desulfurizing iron, desiliconization, dephosphorization, without using poly- slag
Agent, but drive molten iron to spring up from bottom to top using plug-in type spray gun blowing gas, pushing top slag to skimming gate is easy to what is skimmed
New method, its purpose is intended to shorten slag-removing time, reduces residue and iron loss.
Therefore, the solution that the present invention is taken is：
One kind springs up formula molten iron drossing method, it is characterised in that concrete operation step is：
1st, jet gun is inserted：Two jet guns of A, B insert molten iron, two jet gun spacing from hot-metal bottle plan vertical simultaneously
Control is inserted perpendicularly into position when hot-metal bottle is steady at the radius of tank mouth 1/2 1/2 or so of hot-metal bottle port radius length, inserts
Depth 0.5-2.5m, and the line of two jet guns is vertical with traffic direction of skimming.
2nd, jet is operated：Start supply before the muzzle insertion molten iron of two jet guns of A, B, control air supply intensity >=2NL/
(mint), pressure ＞ 0.7MPa；Control A jet guns air supply intensity at 2NL/ (mint), it is strong that B jet guns progressively increase supply
Degree, until after molten iron rolling exposed surface is contacted with molten iron tank skin, then A jet guns air supply intensity is increased until being supplied with B jet guns
Intensity is identical；Then two jet gun air supply intensities of A, B are progressively increased, until molten iron rolling bare area is more than molten iron tank mouth 1/
2, stability contorting air supply intensity starts to skim at 4-6NL/ (mint)；At the end of skimming, jet gun is extracted to be continued to spray after molten iron
Blow more than 30s and close down gas again.
3rd, skim cooperation：With the progress skimmed, the remaining quantity of slag is fewer and fewer, and gas springs up the remaining slag of a distance increasingly
Far, approach at the end of skimming, increase two jet gun spacing of A, B, spacing is increased to tank mouth radius length；Concrete operations are：Profit
Jet gun is lifted with hoist, alignment pin is left the positioning hole 190-210mm on operating platform, hoist is slowly moved along crossbeam
It is dynamic, to prevent jet gun large-amplitude sloshing, until two jet gun spacing decline again when reaching hot-metal bottle tank mouth radius length, make positioning
Pin falls into new positioning hole, and the move distance of skimming of control Cinder Machine only does level side less than hot-metal bottle tank mouth radius length
To linear reciprocating motion.
Beneficial effects of the present invention are：
1st, the present invention inserts jet gun from hot-metal bottle plan vertical, so as to avoid because gun body is long in natural gravity effect
Under generation amount of deflection problem, make mechanical structure simpler.
2nd, the jet gun that the present invention is inserted can carry out moving left and right for horizontal direction in working condition, be more beneficial for gathering
Slag, makes to skim more thoroughly, especially in residue, advantage becomes apparent, and not only can effectively shorten slag-removing time, and greatly subtract
Sulfur content is returned in converter when light iron loss and desulphurization and slag skimming.
Brief description of the drawings
Fig. 1 is to spring up formula molten iron drossing structural scheme of mechanism.
In figure：Crossbeam 1, hoist 2, air supply hose 3, alignment pin 4, positioning hole 5, operating platform 6, A jet guns 71, B sprays
Air gun 72, hot-metal bottle 8.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1：
Molten iron top quantity of slag 3kg/t, the headroom of hot-metal bottle 8 compares 0.13,1400 DEG C of molten iron temperature with tank mouth diameter.
Hot-metal bottle 8 tilts 23 °.Start hoist 2 to start to fall A jet guns 71 and B jet guns 72, make alignment pin 4 accurate
The positioning hole 5 fallen on operating platform 6, lower rifle opens the steam supply valve of air supply hose 3, control air supply intensity 3NL/ (min simultaneously
T), pressure 0.75MPa.
A jet guns 71 and B jet guns 72 are inserted perpendicularly into molten iron, A jet guns 71 and B jets simultaneously from the top of hot-metal bottle 8
The spacing of rifle 72 is tank mouth radius length 1/2, and insertion depth is the 1/2 of molten iron depth.The air supply intensity of A jet guns 71 is constant, progressively
The air supply intensity of B jet guns 72 is increased to 5NL/ (mint), now molten iron rolling, liquid level is exposed.A jet guns 71 are supplied by force again
Degree is adjusted to 5NL/ (mint), and for a period of time, now molten iron bare area visually has been above tank mouth to stability contorting air supply intensity
1/2, start to skim.
When the not enough former quantity of slag 1/3 of level of residue, the lifting A of hoist 2 jet guns 71 and B jet guns 72 leave alignment pin 4
The about 200mm of positioning hole 5 on operating platform 6, slowly hoist 2 is moved along crossbeam 1, by A jet guns 71 and the spacing of B jet guns 72
The tank mouth radius length of hot-metal bottle 8 is adjusted to, declines hoist 2, alignment pin 4 is fallen into new positioning hole 5.Continue to skim until knot
Beam, carries rifle, and continues to supply 1min.
Embodiment 2：
Molten iron top quantity of slag 5kg/t, the headroom of hot-metal bottle 8 compares 0.16,1350 DEG C of molten iron temperature with tank mouth diameter.
Hot-metal bottle 8 tilts 24 °.Start hoist 2 to start to fall A jet guns 71 and B jet guns 72, make alignment pin 4 accurate
The positioning hole 5 fallen on operating platform 6, lower rifle opens the steam supply valve of air supply hose 3, control air supply intensity 2NL/ (min simultaneously
T), pressure 0.70MPa.
A jet guns 71 and B jet guns 72 are inserted perpendicularly into molten iron, A jet guns 71 and B jets simultaneously from the top of hot-metal bottle 8
The spacing of rifle 72 is tank mouth radius length 1/2, and insertion depth is the 2/3 of molten iron depth.The air supply intensity of A jet guns 71 is constant, progressively
The air supply intensity of B jet guns 72 is increased to 6NL/ (mint), now molten iron rolling, liquid level is exposed.A jet guns 71 are supplied by force again
Degree is adjusted to 6NL/ (mint), and for a period of time, now molten iron bare area visually has been above tank mouth to stability contorting air supply intensity
1/2, start to skim.
When the not enough former quantity of slag 1/3 of level of residue, the lifting A of hoist 2 jet guns 71 and B jet guns 72 leave alignment pin 4
The about 200mm of positioning hole 5 on operating platform 6, slowly hoist 2 is moved along crossbeam 1, by A jet guns 71 and the spacing of B jet guns 72
The tank mouth radius length of hot-metal bottle 8 is adjusted to, declines hoist 2, alignment pin 4 is fallen into new positioning hole 5.Hot-metal bottle 8 tilts 1- again
3 °, continue to skim until end, carries rifle, and continues to supply 2min.
Embodiment 3：
Molten iron top quantity of slag 10kg/t, the headroom of hot-metal bottle 8 compares 0.2,1300 DEG C of molten iron temperature with tank mouth diameter.
Hot-metal bottle 8 tilts 25 °.Start hoist 2 to start to fall A jet guns 71 and B jet guns 72, make alignment pin 4 accurate
The positioning hole 5 fallen on operating platform 6, lower rifle opens the steam supply valve of air supply hose 3, control air supply intensity 2NL/ (min simultaneously
T), pressure 0.70MPa.
A jet guns 71 and B jet guns 72 are inserted perpendicularly into molten iron, A jet guns 71 and B jets simultaneously from the top of hot-metal bottle 8
The spacing of rifle 72 is tank mouth radius length 1/2, and insertion depth is the 3/4 of molten iron depth.The air supply intensity of A jet guns 71 is constant, progressively
The air supply intensity of B jet guns 72 is increased to 6NL/ (mint), now molten iron rolling, liquid level is exposed.A jet guns 71 are supplied by force again
Degree is adjusted to 6NL/ (mint), and for a period of time, now molten iron bare area visually has been above tank mouth to stability contorting air supply intensity
1/2, start to skim.
When the not enough former quantity of slag 1/3 of level of residue, the lifting A of hoist 2 jet guns 71 and B jet guns 72 leave alignment pin 4
The about 200mm of positioning hole 5 on operating platform 6, slowly hoist 2 is moved along crossbeam 1, by A jet guns 71 and the spacing of B jet guns 72
The tank mouth radius length of hot-metal bottle 8 is adjusted to, declines hoist 2, alignment pin 4 is fallen into new positioning hole 5.Hot-metal bottle 8 tilts 1- again
3 °, continue to skim until end, carries rifle, and continues to supply 3min.
The iron loss of embodiment 1,2,3 is respectively 0.75t/ tanks, 0.67t/ tanks, 0.96t/ tanks.
Claims (1)
1. one kind springs up formula molten iron drossing method, it is characterised in that concrete operation step is：
(1) jet gun is inserted：Two jet guns of A, B insert molten iron, two jet gun spacing controls from hot-metal bottle plan vertical simultaneously
System is inserted perpendicularly into position when hot-metal bottle is steady at the radius of tank mouth 1/2, insertion depth the 1/2 of hot-metal bottle port radius length
0.5-2.5m, and the line of two jet guns is vertical with traffic direction of skimming；
(2) jet is operated：Start supply before the muzzle insertion molten iron of two jet guns of A, B, control air supply intensity >=2NL/
(mint), pressure ＞ 0.7MPa；Control A jet guns air supply intensity is identical with B jet guns, and then B jet guns progressively increase confession
Gas intensity, until molten iron rolling exposed surface contacted with molten iron tank skin after, then increase A jet guns air supply intensity up to B jet guns
Air supply intensity is identical；Then two jet gun air supply intensities of A, B are progressively increased, until molten iron rolling bare area is more than hot-metal bottle
Mouth 1/2, stability contorting air supply intensity starts to skim at 4-6NL/ (mint)；At the end of skimming, it is follow-up that jet gun extracts molten iron
Continuous injection more than 30s closes down gas again；
(3) skim cooperation：With the progress skimmed, the remaining quantity of slag is fewer and fewer, and it is more and more remote that gas springs up the remaining slag of distance,
At the end of skimming, two jet gun spacing of A, B are increased, spacing is increased to tank mouth radius length；Concrete operations are：Utilize calabash
Reed hangs lifting jet gun, the alignment pin on jet gun is left the positioning hole 190-210mm on operating platform, and hoist is along crossbeam
It is slow mobile, to prevent jet gun large-amplitude sloshing, until two jet gun spacing decline again when reaching hot-metal bottle tank mouth radius length,
Alignment pin is set to fall into new positioning hole, the move distance of skimming of control Cinder Machine is only done less than hot-metal bottle tank mouth radius length
The linear reciprocating motion of horizontal direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410253742.5A CN105296709B (en) | 2014-06-09 | 2014-06-09 | One kind springs up formula molten iron drossing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410253742.5A CN105296709B (en) | 2014-06-09 | 2014-06-09 | One kind springs up formula molten iron drossing method |
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| CN105296709A CN105296709A (en) | 2016-02-03 |
| CN105296709B true CN105296709B (en) | 2017-07-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108193021B (en) * | 2018-03-07 | 2023-03-17 | 上海梅山工业民用工程设计研究院有限公司 | Double-gun device for continuous desulfurization blowing desulfurizer of steel plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2797380Y (en) * | 2005-02-06 | 2006-07-19 | 宝山钢铁股份有限公司 | Device for scooping up slag |
| CN2841671Y (en) * | 2005-04-11 | 2006-11-29 | 武汉钢铁股份有限公司第一炼钢厂 | A kind of metallurgical furnace top blast utility appliance that treatment technology is used that removes the gred outward |
| CN101100702A (en) * | 2007-07-30 | 2008-01-09 | 莱芜钢铁集团有限公司 | Molten iron pot narrow gap gas-blowing slag-removing device and operation technique thereof |
| CN101928801B (en) * | 2010-09-02 | 2012-09-12 | 宝钢工程技术集团有限公司 | Blowing slag-removing equipment for molten iron pretreatment |
| CN103114177B (en) * | 2013-03-12 | 2014-12-17 | 武汉钢铁(集团)公司 | Gas-blowing and slag-gathering spray gun for assisting slag-off of molten iron and using method of spray gun |
| CN203200299U (en) * | 2013-03-15 | 2013-09-18 | 上海梅山钢铁股份有限公司 | Air blowing gun used for blowing air and removing dregs |
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