CN104762437B - A kind of modified model GOR converter - Google Patents
A kind of modified model GOR converter Download PDFInfo
- Publication number
- CN104762437B CN104762437B CN201510172694.1A CN201510172694A CN104762437B CN 104762437 B CN104762437 B CN 104762437B CN 201510172694 A CN201510172694 A CN 201510172694A CN 104762437 B CN104762437 B CN 104762437B
- Authority
- CN
- China
- Prior art keywords
- oxygen
- rifles
- oxygen rifle
- furnace bottom
- existing
- 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.)
- Expired - Fee Related
Links
Abstract
The invention discloses a kind of modified model GOR converter, including furnace wall and furnace bottom thereof, described furnace bottom on a diameter line equidistantly the oxygen rifle of symmetrical three oxygen rifles and centre be positioned at the center of furnace bottom, these three existing oxygen gun-shaped are in a row, also include two oxygen rifles newly increased, five oxygen rifles altogether, these the two oxygen rifle place straight lines increased and three existing oxygen rifle place straight line parallels also lay respectively on the perpendicular bisector between adjacent existing two oxygen rifles, and five oxygen rifles are collectively forming a double isosceles trapezoid.Present invention have the beneficial effect that the counteracting force lifting surface area increase that molten steel washes away and stirs, enhance the stirring intensity turning molten steel in the stove；And improve oxygen dispersion in molten steel, also improve oxygen supply intensity, thus improve high-carbon regions lung-heat decarbonization rate simultaneously, shorten the duration of heat, decreasing the erosion to furnace bottom, thus improving the life-span of furnace bottom wind-eye life-span and converter, reducing the cost of resistance to material and equipment cost.
Description
Technical field
The present invention relates to rustless steel production technical field, particularly a kind of modified model GOR converter.
Background technology
At present, two step method in the world produces in stainless steel art, and the rustless steel of more than 70% produces by AOD.But, AOD enters the restriction of fire bars part with strict, it is impossible to meet the alloy mother solution smelting production of high-carbon, high silicon, high-sulfur more widely.In order to use more extensively, more inexpensive raw material, my company introduced the GOR smelting technique of Ukraine in 2004.
GOR converter refining stainless steel art is to carry out high alloy melt decarburization, reduction, alloying in converter, finally makes the chemical analysis of molten steel and temperature all reach specified value.Its smelting process can divide for three phases, i.e. two heats of oxidation, reduction periods.In the first stage, central canal is blown into oxygen, and ring meets and is blown into protective gas, and electric furnace just molten steel is carried out desiliconization, decarburization and intensification, this stage according to steel grade require to carry out alloy with addition of, and add Calx and carry out slag making；In second stage, the ratio being adjusted central canal oxygen and circumferential weld nitrogen by special distribution program reduces CO dividing potential drop in stove, to reach the purpose of " carbon drop guarantor's chromium ", and carries out deep decarburization；In the phase III, it is blown into straight argon (or nitrogen) to converter molten pool, adds ferrosilicon and carry out reduction deoxidation, and add fluorite and make reducing slag, carry out the reduction of rich chromium slag, and add the metal alloy material alloyings such as electrolytic manganese.
GOR is than AOD, and it differs primarily in that oxygen rifle position is different, and the oxygen rifle of AOD is positioned on shaft side and near furnace bottom, belongs to side-blown mode.And GOR has three oxygen rifles and is respectively positioned on one diameter line of furnace bottom, as it is shown in figure 1, belong to bottom-blown converter mode.Due to the difference of oxygen rifle position, GOR has relatively good blowing dynamic conditions, and the molten steel stirring dynamics smelted in molten bath is bigger, is more conducive to carbon drop, protects chromium, desulfurization, and production efficiency is higher.
It is being carried out substantial amounts of research of technique and transformation always, is striving for drawing close to international most advanced level after introducing GOR technology by my company.At present, every economic and technical norms of smelting at home, the world all reached top standard.But due to bottom-blown converter itself, its heat size is relatively larger, present aspect relatively AOD is become not have advantage at resistance to material.By analysis, the furnace life of GOR promotes and is largely determined by furnace bottom life-span of oxygen lance.
In process of production, the kinetic energy effect of the argon oxygen gas mixture that oxygen rifle is blown into, expanded by heating effect and the powerful turbulent flow souring being caused molten steel upwards to impact by gas streams buoyancy near air port and producing.Owing to being reaction zone near air port, the molten steel near air port is overheated because of fierce Oxidation, has the feature of temperature height, good fluidity, but, also the erosion to the resistance to material of furnace bottom is therefore exacerbated so that the life-span of shaft and the resistance to material of furnace bottom can not be synchronize, makes the lifting in furnace life be restricted.
Additionally, due to the demand of volume of production, oxygen supply intensity must be improved in process of production to increase tap.And original furnace bottom oxygen rifle is after having additional supply of intensity, greatly but the area that scatters is less again for the gas air-flow in bullet hole region, thus directly going out slag face, make boiling and splash aggravation in stove, the accumulated slag phenomenon causing fire door and furnace crown position is serious, not only have impact on manufacturing schedule, and cause serious precious metal loss.Further, splash, to the rice crust ferrum at fire door and furnace crown position, carry out reclaiming again smelting, more than 1000 yuan of cost of increase again per ton so that cost is significantly increased.Our company is in order to reduce cost, exclusively for this Cheng Liao technical team, carries out after tens field observations and analyzing discuss, finally determining, original oxygen gun barrel footpath is somewhat bigger than normal and the quantity principal element being to affect cost on the low side.
Summary of the invention
The goal of the invention of the present invention is in that: for above-mentioned Problems existing, it is provided that a kind of modified model GOR converter, furnace life is longer, lower in cost.
The technical solution used in the present invention is such that
A kind of modified model GOR converter, including furnace wall and furnace bottom thereof, described furnace bottom on a diameter line equidistantly the oxygen rifle of symmetrical three oxygen rifles and centre be positioned at the center of furnace bottom, these three existing oxygen gun-shaped are in a row, also include two oxygen rifles newly increased, five oxygen rifles altogether, these the two oxygen rifle place straight lines increased and three existing oxygen rifle place straight line parallels also lay respectively on the perpendicular bisector between adjacent existing two oxygen rifles, and five oxygen rifles are collectively forming a double isosceles trapezoid.
Adopting five oxygen rifles to be arranged to, double isosceles trapezoid brings has the beneficial effect that molten steel washes away and the counteracting force lifting surface area that stirs increases, and enhances the stirring intensity turning molten steel in the stove；And when ensureing that gas pressure satisfies condition, improve oxygen dispersion in molten steel, also improve oxygen supply intensity simultaneously, thus improve decarbonization rate, shorten the duration of heat, decreasing the erosion to furnace bottom, thus improve the life-span of furnace bottom wind-eye life-span and converter, reducing the cost of resistance to material and equipment cost.
After improvement, the furnace life of GOR converter has reached 231 times, belongs to domestic and international top level at present.The domestic producer totally 3 using GOR converter, respectively Baosteel Desheng, tai shan and our company, the furnace life of Baosteel Desheng is up to 200 times, the furnace life of tai shan about 150 times.And abroad, the GOR furnace life level of GOR Converter Design ground Ukraine is also only at about 150 times.
Moreover, after improvement, through overtesting, close to AOD level, (cost of resistance to material of AOD only has about 49 yuan to the GOR cost of resistance to material, the GOR converter cost of resistance to material before improvement is at about 70 yuan, and the GOR converter cost of resistance to material after improvement has been reduced to about 54 yuan, and gap has narrowed down to about 5 yuan from 21 yuan, for one throughout the year all in the company produced, this will save a very big spending.
As preferably, described oxygen rifle is be socketed, by outer tube and central canal, the bushing type nozzle formed.
Above-mentioned preferred version is carried out it is preferred that, described outer tube is Φ 36*2mm～Φ 26*2mm, and described central canal is Φ 30*3mm～Φ 20*3mm, and the circumferential weld gap between described outer tube and central canal is 1.5mm.After three oxygen rifles increase to five oxygen rifles, the distribution face of air-flow is expanded, and serves and slows down the effect that the resistance to material in local is washed away, and therefore, it can, when keeping the operating pressure in oxygen rifle gun barrel constant, suitably be reduced by the caliber of oxygen rifle.
Oxygen rifle gun barrel change little after, each duration of heat shortens, and enhances denitrification ability, decreases the consumption of argon, thus reducing production cost.Further, also effectively reduce every oxygen rifle gas flow and pressure thereof, can effectively reduce splash.
The outer tube of described oxygen rifle is before transformation, and for Φ 38*2.5mm, central canal is Φ 30*3mm, and circumferential weld gap is 1.5mm.
Above-mentioned preferred version is carried out it is preferred that, described outer tube is Φ 32*2mm, and described central canal is Φ 25*3mm, and the circumferential weld gap between described outer tube and central canal is 1.5mm.
As preferably, the spacing between three existing oxygen rifles is 650～700mm, and the distance between the oxygen rifle newly increased and three existing oxygen rifle place straight lines is 300-500mm.
Above-mentioned preferred version is carried out it is preferred that, the spacing between three existing oxygen rifles is 675mm, and the distance between the oxygen rifle newly increased and three existing oxygen rifle place straight lines is 400mm.
As preferably, described furnace bottom is built by laying bricks or stones for the straight line fissure of displacement in the scope between five oxygen rifles, starts to be that herringbone is built by laying bricks or stones to surrounding from the centrage of this scope again after finishing building five oxygen rifle in-scopes.
Building by laying bricks or stones about furnace bottom, is to increase technological difficulties after oxygen rifle.Owing to 5 oxygen rifles become double isosceles trapezoid to arrange, cannot being that herringbone is built by laying bricks or stones between two deoxygenation rifles, the fissure of displacement and crushing strength between brick and brick reduce, and fastness is affected.For solving this problem, first picking up from spacing degree of accuracy between oxygen rifle and oxygen rifle, installation site 100% must reach pitch requirements.After oxygen rifle spacing reaches degree of accuracy, when building by laying bricks or stones, scope between two volley of rifle fires adopts the straight line fissure of displacement to build by laying bricks or stones, after finishing building two volley of rifle fire in-scopes, it is that herringbone is built by laying bricks or stones to surrounding from centrage again, this masonry way is former never, belongs to pioneering, the problem solving the gap between brick and brick and crushing strength dexterously.
Accompanying drawing explanation
Fig. 1 is oxygen rifle layout in existing GOR converter.
Fig. 2 be the present invention GOR converter in oxygen rifle layout.
Fig. 3 is the cross-sectional view of the oxygen rifle being labeled as 3 in the present invention.
Labelling in figure: 1 is furnace wall, 2 is furnace bottom, and 3 is oxygen rifle, and 3-1 is outer tube, manages centered by 3-2.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment:
As shown in Figure 2, a kind of modified model GOR converter, including furnace wall 1 and furnace bottom 2 thereof, described furnace bottom 2 on a diameter line equidistantly the oxygen rifle 3 of symmetrical three oxygen rifles 3 and centre be positioned at the center of furnace bottom 2, these three existing oxygen rifle 3 shapes are in a row, also include two oxygen rifles 3 newly increased, five oxygen rifles 3 altogether, these the two oxygen rifle 3 place straight lines increased and three existing oxygen rifle 3 place straight line parallels also lay respectively on the perpendicular bisector between adjacent existing two oxygen rifles 3, and five oxygen rifles 3 are collectively forming a double isosceles trapezoid.
As it is shown on figure 3, described outer tube 3-1 is Φ 32*2mm, described center 3-2 is Φ 25*3mm, and the circumferential weld gap between described outer tube 3-1 and central canal 3-2 is 1.5mm.Except the preferred size of the present embodiment, outer tube 3-1 can also choose Φ 35*2mm, Φ 34*2mm, Φ 33*2mm, Φ 31*2mm, Φ 30*2mm, Φ 29*2mm, Φ 28*2mm, Φ 27*2mm equivalence, central canal 3-2 can also choose Φ 29*3mm, Φ 28*3mm, Φ 27*3mm, Φ 26*3mm, Φ 24*3mm, Φ 23*3mm, Φ 22*3mm, Φ 21*3mm etc., will not enumerate in this specification.
Spacing between three existing oxygen rifles 3 is 675mm, and the distance between the oxygen rifle 3 newly increased and three existing oxygen rifle 3 place straight lines is 400mm.
Described furnace bottom 2 is built by laying bricks or stones for the straight line fissure of displacement in the scope between five oxygen rifles 3, starts to be that herringbone is built by laying bricks or stones to surrounding from the centrage of this scope again after finishing building five oxygen rifle 3 in-scopes.
Below, enumerate the beneficial effect that the present invention brings by some data informations to be further detailed.
Before transformation, the outer tube 3-1 of oxygen rifle 3 is Φ 38*2.5mm, and central canal 3-2 is Φ 30*2mm, and the circumferential weld gap between outer tube 3-1 and central canal 3-2 is 1.5mm.The operating pressure of central canal 3-2 is 1MPa, and oxygen flow is 98.15Nm3/min；The operating pressure of circumferential weld is 0.8MPa, and nitrogen flow is 19.35m3/ min, the time every time smelted is 95min.Flow rate calculation formula is general knowledge known in this field, does not just list in detail.
After transformation, such as the present embodiment, described outer tube 3-1 is Φ 32*2mm, and described central canal 3-2 is Φ 25*3mm, and the circumferential weld gap between described outer tube 3-1 and central canal 3-2 is 1.5mm.Keeping operating pressure constant, oxygen flow is 94.5Nm3/ min, nitrogen flow is 19.35m3/ min, single has shortened to 80min the duration of heat, and the production efficiency of every stove improves 15%.
From embodiment it can be seen that the oxygen rifle 3 after improving decreases central canal 3-2 oxygen flow, add the shield gas flow rate in circumferential weld between outer tube 3-1 and central canal 3-2 so that oxygen rifle 3 good cooling results, can effectively improve furnace bottom 2 life-span of oxygen lance.
In reduction denitrification process, the scattered Argon Bubble of low speed is also easier to absorption atom N, and not only denitrification ability strengthens, it is also possible to reduce argon consumption, reduces production cost.Before transformation, the consumption of argon is 32 kgs/tonne of steel；After transformation, the consumption of argon is 26 kgs/tonne of steel, and therefore often one ton of steel of refining can save 6 kilograms of argon.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (6)
- null1. a modified model GOR converter，Including furnace wall (1) and furnace bottom (2) thereof，Described furnace bottom (2) on a diameter line equidistantly the oxygen rifle (3) of symmetrical three oxygen rifles (3) and centre be positioned at the center of furnace bottom (2)，These three existing oxygen rifle (3) shapes are in a row，It is characterized in that: also include two oxygen rifles (3) newly increased，Five oxygen rifles (3) altogether，These two oxygen rifle (3) place straight lines and three existing oxygen rifle (3) the place straight line parallels increased also lay respectively on the adjacent perpendicular bisector having between two oxygen rifles (3)，Five oxygen rifles (3) are collectively forming a double isosceles trapezoid，Described furnace bottom (2) is built by laying bricks or stones for the straight line fissure of displacement in the scope between five oxygen rifles (3)，Start to be that herringbone is built by laying bricks or stones to surrounding from the centrage of this scope again after finishing building five oxygen rifle (3) in-scopes.
- 2. a kind of modified model GOR converter according to claim 1, it is characterised in that: described oxygen rifle (3) is be socketed, by outer tube (3-1) and central canal (3-2), the bushing type nozzle formed.
- 3. a kind of modified model GOR converter according to claim 2, it is characterized in that: described outer tube (3-1) is Φ 36*2mm～Φ 26*2mm, described central canal (3-2) is Φ 30*3mm～Φ 20*3mm, and the circumferential weld gap between described outer tube (3-1) and central canal (3-2) is 1.5mm.
- 4. a kind of modified model GOR converter according to claim 3, it is characterised in that: described outer tube (3-1) is Φ 32*2mm, and described central canal (3-2) is Φ 25*3mm, and the circumferential weld gap between described outer tube (3-1) and central canal (3-2) is 1.5mm.
- 5. a kind of modified model GOR converter according to claim 1, it is characterized in that: the spacing between three existing oxygen rifles (3) is 650～700mm, the distance between the oxygen rifle (3) newly increased and three existing oxygen rifle (3) place straight lines is 300-500mm.
- 6. a kind of modified model GOR converter according to claim 5, it is characterised in that: the spacing between three existing oxygen rifles (3) is 675mm, and the distance between the oxygen rifle (3) newly increased and three existing oxygen rifle (3) place straight lines is 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510172694.1A CN104762437B (en) | 2015-04-14 | 2015-04-14 | A kind of modified model GOR converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510172694.1A CN104762437B (en) | 2015-04-14 | 2015-04-14 | A kind of modified model GOR converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104762437A CN104762437A (en) | 2015-07-08 |
| CN104762437B true CN104762437B (en) | 2016-07-06 |
Family
ID=53644527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510172694.1A Expired - Fee Related CN104762437B (en) | 2015-04-14 | 2015-04-14 | A kind of modified model GOR converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104762437B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938790A (en) * | 1969-02-20 | 1976-02-17 | Eisenwerk-Gesellschaft Maximilianshutte Mbh | Method and converter for refining pig-iron into steel |
| CN101435660A (en) * | 2008-12-30 | 2009-05-20 | 山东泰山钢铁集团有限公司 | Masonry method of stainless steel smelting GOR furnace bottom |
| CN103014223A (en) * | 2012-12-25 | 2013-04-03 | 四川西南不锈钢有限责任公司 | Method for prolonging service life of GOR converter bottom |
| 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 |
-
2015
- 2015-04-14 CN CN201510172694.1A patent/CN104762437B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938790A (en) * | 1969-02-20 | 1976-02-17 | Eisenwerk-Gesellschaft Maximilianshutte Mbh | Method and converter for refining pig-iron into steel |
| CN101435660A (en) * | 2008-12-30 | 2009-05-20 | 山东泰山钢铁集团有限公司 | Masonry method of stainless steel smelting GOR furnace bottom |
| CN103014223A (en) * | 2012-12-25 | 2013-04-03 | 四川西南不锈钢有限责任公司 | Method for prolonging service life of GOR converter bottom |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104762437A (en) | 2015-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108251592B (en) | A kind of converter smelting method of extremely low phosphoretic steel | |
| CN104831153B (en) | The preparation method of V150 grade of steel high-strength tenacity casing steels | |
| CN104328338B (en) | Small-scale finish-rolled twisted steel and production method thereof | |
| CN105018855B (en) | Method for producing circular sulfur-resistant pipeline steel billet for oil and gas collection and transmission | |
| CN108004369A (en) | It is a kind of improve steel scrap enter stove than method for making steel | |
| CN108647407A (en) | A kind of pneumatic steelmaking flue gas analysis carbon determination method | |
| CN110343801A (en) | A kind of the bottom rifle method for arranging and bottom blowing method of the big converter molten pool stirring of top and bottom complex blowing | |
| CN100354433C (en) | Converter smelting method | |
| CN103060510A (en) | High scrap ratio smelting method by adopting gas to heat | |
| CN104060021B (en) | A kind of low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique | |
| CN103555889A (en) | Device and method for quickly removing occluded foreign substances in molten steel | |
| CN103571999A (en) | Method for smelting nitrogen-controlling martensite stainless steel through total molten iron | |
| CN103160637A (en) | Low-phosphorous steel smelting method of mixed blowing of oxygen and nitrogen of top blowing oxygen lance of converter | |
| CN102191357B (en) | Method and improved device for argonoxygen refining of low-carbon ferrochrome | |
| CN105200315B (en) | A kind of production method of anchor bar steel | |
| CN109234489A (en) | The control method of catch carbon stage nitrogen increased amount is reduced when a kind of converter smelting mild steel | |
| US9809868B2 (en) | Straight barrel type vacuum refining device and method for use the same | |
| JP5453751B2 (en) | Ladle for refining molten steel and method for refining molten steel | |
| CN112266999A (en) | Energy-saving and efficient vanadium extraction process | |
| CN103014223B (en) | Method for prolonging service life of GOR converter bottom | |
| CN104762437B (en) | A kind of modified model GOR converter | |
| CN207498409U (en) | A kind of RH refining furnaces dip pipe | |
| CN105734198B (en) | A kind of preparation method of the phosphorous weathering steel of electricity converter smelting | |
| CN104846150A (en) | Method for smelting low-aluminium moulded steel | |
| CN204630364U (en) | Bath smelting furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20170316 Granted publication date: 20160706 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170916 Granted publication date: 20160706 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20200414 |