CN103008636B - Gun insertion type stopper rod device and method using same for absorbing inclusions at gate - Google Patents
Gun insertion type stopper rod device and method using same for absorbing inclusions at gate Download PDFInfo
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- CN103008636B CN103008636B CN201310021124.3A CN201310021124A CN103008636B CN 103008636 B CN103008636 B CN 103008636B CN 201310021124 A CN201310021124 A CN 201310021124A CN 103008636 B CN103008636 B CN 103008636B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003780 insertion Methods 0.000 title claims abstract description 5
- 230000037431 insertion Effects 0.000 title claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims abstract description 103
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 67
- 239000010959 steel Substances 0.000 claims abstract description 67
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229910052786 argon Inorganic materials 0.000 claims abstract description 32
- 238000007664 blowing Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000010813 municipal solid waste Substances 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 18
- 238000001179 sorption measurement Methods 0.000 claims description 12
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009749 continuous casting Methods 0.000 abstract description 13
- 230000003749 cleanliness Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000024121 nodulation Effects 0.000 abstract 1
- -1 aluminum-zirconium-carbon Chemical compound 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention provides a gun insertion type stopper rod device and a method using the same for absorbing inclusions at a gate. The device mainly comprises an absorption gun, a hollow stopper rod, a hot argon blowing device, horizontal clamps and a vertical lifting frame, the absorption gun is of a hollow bamboo-shaped structure and inserted into the hollow stopper rod of a long cylindrical structure, the upper end of the hollow stopper rod is fixed by the corresponding horizontal clamp, one end of the hot argon blowing device is connected on an external hot argon pipeline while the other end of the hot argon blowing device is inserted into a hollow pipe at the top of the hollow stopper rod, one end of the stopper rod horizontal clamp is connected with the vertical lifting frame while the other end thereof is mutually clamped with the hollow stopper rod, and one end of the absorption gun horizontal clamp is connected with the vertical lifting frame while the other end thereof is mutually clamped with the absorption gun. The method using the device for absorbing the inclusions at the gate includes the steps of gun insertion, argon sealing, gun descending, absorption and gun replacement. The device is scientific in structural design, part of time for gate changing is saved, smooth pouring of continuous casting is benefitted by using the device for absorbing sundries, molten steel cleanliness is improved, and gate nodulation probability is decreased.
Description
Technical field
The present invention relates to manufacture and the application of continuous casting stopper, especially relate to a kind of plug in rifle
Formula stopper device and by its method at mouth of a river place dross inclusion adsorption.Be specially adapted to the steel grade that nozzle clogging easily appears in steel plant's cast aluminum killed steel, Aluminum steel, Ti-containing steel and rare earth steel etc.
Background technology
Continuous casting is important procedure in metallurgical production process, and as the important refractory nozzle connecting tundish and crystallizer, being called as " neck " of continuous casting, having the effect of forming a connecting link, is the important step guaranteeing continuous casting stable operation.In steel plant's casting process, often there is dross and cause nozzle blocking in middle water containing opening and submersed nozzle, affects cast and the slab quality of continuous casting.Along with the improvement of continuous casting process and the exploitation of refractory material, have the service life at the mouth of a river and significantly improved, but, can A1 be there is in casting cycle
2o
3and other element dross phenomenon of part, especially the Al killed steel of casting, containing Al steel, containing Ti steel and rare earth steel time, clogging is very serious, annoyings continuous casting working procedure always.Nozzle clogging or blocking not only reduce the production efficiency of conticaster, affect whole casting process, and are the one of the main reasons causing steel products defect.
Nippon installs central layer additional in the submersed nozzle body that insulating materials is made, and before cast, by central layer electrified regulation, improves mouth of a river inner wall temperature, thus avoids sharply declining the Al caused because of steel contacts mouth of a river inner wall temperature
2o
3adhere to.Sumitomo Metal Industries develop and utilize tundish ledge to make molten steel produce the technology of eddy current, and the steady flowing of molten steel, effectively inhibits the gathering of nozzle blocking thing.Japanese kobe steel develops a kind of novel submersed nozzle with air cooling and electromagnetic mixing apparatus, mouth of a river outer wall is processed with the dark ring-shaped groove of 10mm to increase frigorimeter area, can realizes overall process Prepared by Low Superheat Pouring, avoid nozzle blocking.Weirton steel plant of the U.S. have carried out a large amount of productive experiment and have alleviated Submerged Nozzle Clogging Course, take the measures such as molding casting can reduce the generation of field trash, thus improve Cleanliness of Molten Steel.
The impact of outlet shapes on mouth of a river result of use is mainly reflected in steel flow on the impact depth of crystallizer molten steel, for meeting the needs of high pulling rate sheet blank continuous casting, Tian Naiyuan etc. develop a kind of four side opening mouths of a river being called as dissipative type, reduce the impact depth of molten steel and field trash, be conducive to the floating of field trash, the effect of prevention of immersed nozzle clogging can be played to a certain extent.Zhao Guangrong etc. think that appropriate design mouth of a river inner-cavity structure is conducive to improving the blocking of mouth of a river inner chamber, and the traditional straight cavate mouth of a river inner-cavity structure molten steel and mouth of a river inwall direct contact surface in drainage process amass large, A1
2o
3also large Deng field trash sticking probability, be modified into the stepped annular formula inner chamber mouth of a river and dicyclo step type water gap, alleviated A1
2o
3adhere to Deng field trash.The research such as Chen Chongfeng is thought when surface roughness is more than 0.3mm, the viscous partial failure in molten steel boundary layer, and the protective effect of viscous layer disappears, the Al in steel
2o
3be easy to enrichment Deng field trash, therefore mouth of a river working face should be smooth as far as possible.Su Long etc. think from material research, put forth effort to develop ZrB
2, the nonmetal oxide material such as BN, ZrO-CaO-C material, low carbon materials (carbon <5%), without silicon Al
2o
3the mouth of a river of the materials such as-C material and C and Si free materials, drops into practice and has certain anti-clogging effect.
How what current various method was mainly studied improves gate structure if being, how to prevent and to slow down nozzle clogging, and to the flow direction of field trash and the dross mouth of a river consider considerably less, fundamentally do not solve the problem of nozzle clogging blocking.Be mingled with the slotting gun-type stopper absorption that the present invention proposes, avoid nozzle clogging, the method improving Cleanliness of Molten Steel has no report, and this invention has unique novelty.
Summary of the invention
Goal of the invention of the present invention is the many deficiencies for prior art, one is to provide a kind of slotting gun-type stopper device, two are to provide a kind of use inserts the method for gun-type stopper device at mouth of a river place dross inclusion adsorption, object by absorption rifle, the field trash flowing through the mouth of a river is adsorbed in time and fixed, and solves the problem that nozzle clogging improves Cleanliness of Molten Steel simultaneously.Be specially adapted to the continuous casting stopper rod multifunction technology upgrading of existing steel plant and measures to reform, promote the construction of clean steel platform.
The present invention is by the following technical solutions:
A kind of slotting gun-type stopper device, comprises the lifting motor be connected with horizontal clamper, it is characterized in that, described device is primarily of absorption rifle, hollow stopper, hot argon-blowing device, horizontal clamper and vertical lift frame composition;
A. described absorption rifle is hollow nodular structure, its outer surface is provided with many fins or groove, the inner base of absorption rifle manufactures by common resistance to material material, it is the special coat of resistance to material of 1 ~ 5mm that its outer surface is provided with thickness, absorption rifle inserts in hollow stopper, its upper end is connected with horizontal clamper, in the insertion mouth of a river, lower end;
B. described hollow stopper is elongated cylindrical structure, and be divided into caput and excellent body, caput is helical structure, and caput is connected with excellent body by screw thread, and the inside of hollow stopper is provided with the hollow tube coordinating absorption rifle to insert, and hollow stopper upper end and horizontal clamper are fixed;
C. described hot argon-blowing device is made up of supply air line and nozzle, and nozzle one end is connected on external heat argon gas pipeline, and the other end inserts in the hollow tube at hollow stopper top;
D. described horizontal clamper is made up of the horizontal clamper of stopper and the horizontal clamper of absorption rifle, and the horizontal clamper one end of stopper is connected with vertical lift frame, and the other end and hollow stopper fold to be held; The horizontal clamper of absorption rifle, one end is connected with vertical lift frame, and the other end clamps mutually with absorption rifle;
E. described vertical lift frame is tubular structure, is fixed on the sidewall of tundish.
Preferably, described absorption rifle is bamboo pole shape, is divided into single-unit type or more piece type structure, is threaded connection between the joint of more piece type structure and joint.
Preferably, described horizontal clamper comprises the horizontal clamper of stopper and the horizontal clamper of absorption rifle, one end of the horizontal clamper of stopper, the horizontal clamper of absorption rifle is slidably connected with vertical lift frame respectively, and the other end is clamped on hollow stopper and absorption rifle respectively successively.
Preferably, described vertical lift frame is made up of fall way and fixed head, and fall way is connected with horizontal clamper, and fixed head is fixed on tundish sidewall, by the height of vertical lift frame adjustment clamper.
Use inserts the method for gun-type stopper device at mouth of a river place dross inclusion adsorption, and its method of operating is:
A. rifle is inserted: before centre is unwrapped and watered, more piece is adsorbed rifle and is threaded connection, be fixed on horizontal clamper, adjusting vertical lifting frame, make the hollow tube of absorption rifle centering hollow stopper, will adsorb rifle and insert in hollow stopper, rifle rifle head upon adsorption stops after arriving hollow plug caput position;
B. argon envelope: open argon gas pipeline, pass into hot argon gas, make argon gas be blown in hollow tube from the nozzle of stopper head, form stable argon atmospher on the one hand, blocks air and infiltrates along gap, play sealing function, make absorption rifle have uniform temperature on the other hand;
C. fall rifle: open hollow stopper, centre is unwrapped and is watered, and after MOLTEN STEEL FLOW is stable, reduces vertical lift frame, absorption rifle is inserted in the mouth of a river, starts the field trash adsorbed in molten steel;
D. adsorb: molten steel flows into submersed nozzle from tundish upper nozzle, the field trash of wherein sweeping along collides with absorption rifle, forms complicated high-melting-point salt, sticks on absorption rifle;
E. change rifle: after absorption rifle is stained with field trash, extract absorption rifle, lay down the absorption rifle joint being stained with field trash, absorption rifle is reinserted in hollow stopper, continue operation.
Adopt technique scheme, compared with prior art, slotting gun-type stopper assembling device of the present invention, scientific structure design, saved the time that part changes the mouth of a river, and it is easy to adjust, quick to adsorb rifle, is conducive to the suitable of continuous casting and waters.With it at mouth of a river place dross inclusion adsorption, its significant effect is:
1) improve Cleanliness of Molten Steel.Make molten steel enter crystallizer before obtain further purification, very favourable to raising casting blank solidification quality.
2) nozzle clogging probability is reduced.Flowed through the field trash at the mouth of a river by absorption rifle absorption major part, greatly reduce nozzle clogging probability, slow down the erosion of refractory material, reduce the cost of resistance to material;
3) continuous casting operation technique is optimized.
4) the present invention adsorbs with inserting gun-type stopper device the method be mingled with at mouth of a river place, and operating procedure is simple and practical, reduces the financial cost of the resistance to material of continuous casting, improves slab quality, for continuous, efficient, stable cast purifying of steel is laid a good foundation.
Accompanying drawing explanation
Fig. 1 is using state figure of the present invention, is mouth of a river removal of inclusions schematic diagram.
Fig. 2 is that the present invention inserts gun-type stopper structural representation.
Fig. 3 is that the present invention one saves absorption rifle structural representation.
In figure, absorption rifle 1; Hot argon-blowing device 2; Hollow stopper 3; Horizontal clamper 4; Vertical lift frame 5; Molten steel 6; Tundish 7; The mouth of a river 8; Crystallizer 9; Shrinkage pool 10; Screw thread joint 11.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
See Fig. 1-3, a kind of slotting gun-type stopper device, by absorption rifle 1, hot argon-blowing device 2, hollow stopper 3, vertical lift frame 5, horizontal clamper 4 forms.Described absorption rifle 1 in bamboo pole shape, by rifle head with keep fit to form.Divide two types, one is single-unit type, and the rifle head part inserted in molten steel adopts special resistance to material, and body of a gun part adopts common resistance to material, is applicable to the situation that foreign substance in molten steel is less, need not change rifle.Another kind is more piece type, and overall point some joints, save and be connected by screw thread 11 between joint, every material-saving matter is all the resistance to material of speciality, is applicable to the situation that foreign substance in molten steel is more, need to change rifle.Absorption rifle 1 appearance has some fins or groove, or has a large amount of salient point or shrinkage pool 10, or fin, groove, salient point, shrinkage pool 10 any combination, be convenient to adsorb a large amount of field trash.Absorption rifle 1 specialized parts inner base is common resistance to material, material be aluminium-carbonaceous, aluminum-zirconium-carbon matter, vitreous silica matter, magnesium-carbonaceous or aluminium-calcareous etc. one of them; Outer surface has the coat of special resistance to material, and thickness is 1 ~ 5mm, and material is both combination one or any of calcium oxide, magnesia, zirconia, silica.
Hollow stopper 3 is elongated cylindrical, is fixed on the vertical lift frame 5 of tundish 7, and hollow stopper 3 inside is hollow tube, and hollow tube coordinates absorption rifle 1 to insert, and bottom caput is connected with excellent body by screw thread, detachably.Hollow stopper 3 material is the one in aluminium-carbonaceous, aluminum-zirconium-carbon matter or vitreous silica matter.
Hot argon-blowing device 2 is made up of supply air line and nozzle, and nozzle one end is connected on external heat argon gas pipeline, and the other end inserts in the hollow tube at hollow stopper 3 top.
Horizontal clamper 4 comprises the horizontal clamper of stopper and the horizontal clamper of absorption rifle, the horizontal clamper of stopper is arranged in parallel with the horizontal clamper of absorption rifle, one end is connected with vertical lift frame, the other end clamps hollow stopper 3 and absorption rifle 1 respectively, horizontal clamper 4 can move horizontally, and regulates horizontal range by moving horizontally.
Vertical lift frame 5 is made up of steel pipe and fixation steel plate, and steel-pipe welding is on fixed head, and fixed head is fixed on the sidewall of tundish 7, is connected with horizontal clamper 4.
Remove the method for inclusion content in melting steel at mouth of a river place with slotting gun-type stopper device:
More piece adsorbed after rifle 1 connected by screw thread 11, be fixed on horizontal clamper 4, adjusting vertical lifting frame 5, inserted by absorption rifle 1 in hollow stopper 3, rifle head drops to stopper head place to be stopped; Pass into hot argon gas, the hollow tube of sealed hollow stopper 3.Then open hollow stopper 3, tundish 7 is opened and is watered, and after MOLTEN STEEL FLOW is stable, reduces vertical lift frame 5, makes absorption rifle 1 insert certain depth in the mouth of a river 8, start to adsorb the field trash in molten steel 6; When field trash be adsorbed to a certain amount of after, absorption rifle 1 can be extracted, lay down absorption rifle 1 and be stained with a joint of field trash, then reinserted in hollow stopper 3, continue to use.
Concrete operation step is as follows:
Step 1: plug in rifle.Before centre is unwrapped and watered, more piece is adsorbed rifle 1 and connected by screw thread 11, be fixed on horizontal clamper 4, adjusting vertical lifting frame 5, make the hollow tube of absorption rifle 1 centering hollow stopper 3, absorption rifle 1 is inserted, arrive behind stopper head position until rifle head and stop;
Step 2: argon seals.Open argon gas pipeline, pass into the hot argon gas of 1300 DEG C, the ventilation flow rate of argon gas is 1.2L/min, make argon gas be blown in hollow tube from the nozzle of stopper head, form stable argon atmospher on the one hand, block air and infiltrate along gap, play sealing function, make absorption rifle have uniform temperature on the other hand;
Step 3: fall rifle.Open hollow stopper 3, tundish 7 is opened and is watered, and after MOLTEN STEEL FLOW is stable, is fallen by the crane of clamping absorption rifle 15 low, makes absorption rifle 1 insert certain depth in molten steel;
Step 4: absorption.Molten steel flows into submersed nozzle from tundish upper nozzle 8, and the field trash of wherein sweeping along collides with absorption rifle 1, forms complicated high-melting-point salt, sticks on absorption rifle 1.
Step 5: change rifle.If Cleanliness of Molten Steel is higher, one is watered secondary interior without the need to changing rifle; If steel quality is poor, after cast a period of time, absorption rifle is stained with field trash, then extract absorption rifle by vertical lift frame, note regulating argon flow amount simultaneously, make MOLTEN STEEL FLOW keep stable, lay down the joint being stained with field trash, change a joint, reinsert in stopper, continue to use.
Gun-type stopper device inserted by embodiment 1 single-unit type
The present embodiment is inserted gun-type stopper device and is seen Fig. 3, this slotting gun-type stopper device is applicable to the situation that foreign substance in molten steel is less, need not change rifle, its absorption rifle 1 is single-unit type, the long 1900mm of the body of a gun, diameter 25mm, the wherein long 250mm of rifle head part, the outer surface of rifle head is provided with a large amount of shrinkage pool 10, and the effect of shrinkage pool 10 is a large amount of field trashes of absorption.Body of a gun refractory material is conventional aluminium-carbonaceous manufacture, and rifle head is special refractory material, and wherein matrix is aluminium-carbonaceous, and the outer surface of rifle head is provided with the coat of special resistance to material, and coat thickness is 4mm, and material is calcium oxide.
Gun-type stopper device to go out dross inclusion adsorption method at the mouth of a river is inserted by single-unit type
Before the tundish 7 be positioned at above crystallizer 9 is opened and watered, be fixed on by absorption rifle 1 on horizontal clamper 4, adjusting vertical lifting frame 5, inserted by absorption rifle 1 in hollow stopper 3, rifle head drops to stopper head place to be stopped; Pass into hot argon gas, the hollow tube of sealed hollow stopper 3; Open hollow stopper 3, tundish 7 is opened and is watered, after MOLTEN STEEL FLOW is stable, reduces vertical lift frame 5, make absorption rifle 1 insert 250mm in the mouth of a river 8, field trash in molten steel 6 reacts with the top layer material of absorption rifle 1, generate high-melting-point complex inclusion, and be attracted in shrinkage pool 10, after to be cast, extract absorption rifle 1 to clear up, substantially increase Cleanliness of Molten Steel.
Gun-type stopper device inserted by embodiment 3 more piece type
See that Fig. 2 the present embodiment has made a kind of slotting gun-type stopper, be applicable to the situation that foreign substance in molten steel is more, need to change rifle, its absorption rifle 1 is more piece type structure, the long 2000mm of rifle, diameter 25mm, be divided into 5 joints, often save long 400mm, every head successively has screw thread 11, and the outer surface of absorption rifle is provided with a large amount of shrinkage pools 10, and shrinkage pool 10 is used for adsorbing a large amount of field trash.The matrix of absorption rifle 1 is aluminium-carbonaceous, and outer surface has the coat of special resistance to material, and thickness is 4mm, and material is calcium oxide and magnesia.
Gun-type stopper device to go out dross inclusion adsorption method at the mouth of a river is inserted by more piece type
Before the centre be positioned at above crystallizer 9 is unwrapped and watered, more piece adsorbed after rifle 1 connected by screw thread 11, be fixed on horizontal clamper 4, adjusting vertical lifting frame 5, will adsorb rifle and insert in hollow stopper 3, rifle head drops to hollow plug caput place to be stopped, open the nozzle of hot argon-blowing device 2, pass into hot argon gas, the hollow tube of sealed hollow stopper 3, then hollow stopper 3 is opened, tundish 7 is opened and is watered, after MOLTEN STEEL FLOW is stable, reduce vertical lift frame 5, absorption rifle 1 is made to insert 300mm in the mouth of a river 8, field trash in molten steel reacts with the top layer material of absorption rifle 1, generate high-melting-point complex inclusion, and be attracted in shrinkage pool 10, after a period of time to be cast, absorption rifle 1 is stained with field trash, then extract absorption rifle 1 by vertical lift frame 5, regulate argon flow amount simultaneously, MOLTEN STEEL FLOW is made to keep stable, lay down the absorption rifle joint being stained with field trash, change a joint, reinsert in hollow stopper 3, continue to use.
Gun-type stopper device inserted by embodiment 5 fin single-unit type
Made a kind of single-unit type and inserted gun-type stopper, be applicable to the situation that foreign substance in molten steel is less, need not change rifle, its absorption rifle 1 is single-unit type, and the long 1900mm of rifle, diameter 25mm, the wherein long 250mm of rifle head part, rifle head has a large amount of fin, adsorbable a large amount of field trash.Body of a gun refractory material is conventional aluminium-carbonaceous, and rifle head is special refractory material, and wherein matrix is aluminum-zirconium-carbon matter, and outer surface has the coat of special resistance to material, and thickness is 4mm, and material is calcium oxide.
Gun-type stopper to go out dross inclusion adsorption method at the mouth of a river is inserted by fin single-unit type
Before the tundish 7 be positioned at above crystallizer 9 is opened and watered, be fixed on by absorption rifle 1 on horizontal clamper 4, adjusting vertical lifting frame 5, inserted by absorption rifle 1 in hollow stopper 3, rifle head drops to stopper head place to be stopped; Open hot argon-blowing device 2 and pass into hot argon gas, the hollow tube of sealed hollow stopper 3; Open hollow stopper 3, tundish 7 is opened and is watered, after MOLTEN STEEL FLOW is stable, reduces vertical lift frame 5, make absorption rifle 1 insert 250mm in the mouth of a river, field trash in molten steel reacts with the top layer material of absorption rifle 1, generate high-melting-point complex inclusion, and be attracted to fin place, after to be cast, to draw guns cleaning, substantially increase Cleanliness of Molten Steel.
Gun-type stopper inserted by embodiment 6 fin more piece type
Made a kind of slotting gun-type stopper, be applicable to the situation that foreign substance in molten steel is more, need to change rifle, its absorption rifle 1 is more piece type, the long 2000mm of rifle, diameter 25mm, is divided into 5 joints, often saves long 400mm, every head successively has screw thread 11, and absorption rifle 1 has a large amount of fin, adsorbable a large amount of field trash.Absorption rifle 1 matrix is aluminum-zirconium-carbon matter, and outer surface has the coat of special resistance to material, and thickness is 4mm, and material is calcium oxide and magnesia.
The method of gun-type stopper at mouth of a river place dross inclusion adsorption is inserted by fin more piece type
Before the tundish 7 be positioned at above crystallizer 9 is opened and watered, more piece adsorbed after rifle connected by screw thread 11, be fixed on horizontal clamper 4, adjusting vertical lifting frame 5, inserted by absorption rifle 1 in hollow stopper 3, rifle head drops to stopper head place to be stopped; Pass into hot argon gas, the hollow tube of sealed hollow stopper 3; Open hollow stopper, tundish 7 is opened and is watered, after MOLTEN STEEL FLOW is stable, reduce vertical lift frame 5, make absorption rifle 1 insert 300mm in the mouth of a river, the field trash in molten steel reacts with the top layer material of absorption rifle 1, generates high-melting-point complex inclusion, and be attracted to fin place, after a period of time to be cast, absorption rifle 1 is stained with field trash, then extract absorption rifle by vertical lift frame 5, regulate argon flow amount simultaneously, make MOLTEN STEEL FLOW keep stable, lay down the joint being stained with field trash, change a joint, reinsert in stopper, continue to use.
Specific embodiments of the invention are only above; although the present invention discloses as above with preferred embodiment; but the present invention is not limited thereto; the changes that any person skilled in the art can think of; not departing from design philosophy of the present invention and scope; various change and retouching are carried out to the present invention, all should drop within protection scope of the present invention.
Claims (5)
1. a slotting gun-type stopper device, comprises the lifting motor be connected with horizontal clamper, it is characterized in that, described device is primarily of absorption rifle, hollow stopper, hot argon-blowing device, horizontal clamper and vertical lift frame composition;
A. described absorption rifle is hollow nodular structure, its outer surface is provided with many fins or groove, the inner base of absorption rifle manufactures by common resistance to material material, it is the special coat of resistance to material of 1 ~ 5mm that its outer surface is provided with thickness, absorption rifle inserts in hollow stopper, its upper end is connected with horizontal clamper, in the insertion mouth of a river, lower end;
B. described hollow stopper is elongated cylindrical structure, and be divided into caput and excellent body, caput is helical structure, and caput is connected with excellent body by screw thread, and the inside of hollow stopper is provided with the hollow tube coordinating absorption rifle to insert, and hollow stopper upper end and horizontal clamper are fixed;
C. described hot argon-blowing device is made up of supply air line and nozzle, and nozzle one end is connected on external heat argon gas pipeline, and the other end inserts in the hollow tube at hollow stopper top;
D. described horizontal clamper is made up of the horizontal clamper of stopper and the horizontal clamper of absorption rifle, and the horizontal clamper one end of stopper is connected with vertical lift frame, and the other end and hollow stopper fold to be held; The horizontal clamper of absorption rifle, one end is connected with vertical lift frame, and the other end clamps mutually with absorption rifle;
E. described vertical lift frame is tubular structure, is fixed on the sidewall of tundish.
2. slotting gun-type stopper device according to claim 1, is characterized in that, described absorption rifle is bamboo pole shape, is divided into single-unit type or more piece type structure, is threaded connection between the joint of more piece type structure and joint.
3. slotting gun-type stopper device according to claim 1, it is characterized in that, described horizontal clamper comprises the horizontal clamper of stopper and the horizontal clamper of absorption rifle, one end of the horizontal clamper of stopper, the horizontal clamper of absorption rifle is slidably connected with vertical lift frame respectively, and the other end is clamped on hollow stopper and absorption rifle respectively successively.
4. slotting gun-type stopper device according to claim 1, it is characterized in that, described vertical lift frame is made up of fall way and fixed head, and fall way is connected with horizontal clamper, fixed head is fixed on tundish sidewall, by the height of vertical lift frame adjustment clamper.
5. with slotting gun-type stopper device in a method for mouth of a river place dross inclusion adsorption, it is characterized in that, its method of operating is:
A. rifle is inserted: before centre is unwrapped and watered, more piece is adsorbed rifle and is threaded connection, be fixed on horizontal clamper, adjusting vertical lifting frame, make the hollow tube of absorption rifle centering hollow stopper, will adsorb rifle and insert in hollow stopper, rifle rifle head upon adsorption stops after arriving hollow plug caput position;
B. argon envelope: open argon gas pipeline, pass into hot argon gas, make argon gas be blown in hollow tube from the nozzle of stopper head, form stable argon atmospher on the one hand, blocks air and infiltrates along gap, play sealing function, make absorption rifle have uniform temperature on the other hand;
C. fall rifle: open hollow stopper, centre is unwrapped and is watered, and after MOLTEN STEEL FLOW is stable, reduces vertical lift frame, absorption rifle is inserted in the mouth of a river, starts the field trash adsorbed in molten steel;
D. adsorb: molten steel flows into submersed nozzle from tundish upper nozzle, the field trash of wherein sweeping along collides with absorption rifle, forms complicated high-melting-point salt, sticks on absorption rifle;
E. change rifle: after absorption rifle is stained with field trash, extract absorption rifle, lay down the absorption rifle joint being stained with field trash, absorption rifle is reinserted in hollow stopper, continue operation.
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| CN201310021124.3A CN103008636B (en) | 2013-01-21 | 2013-01-21 | Gun insertion type stopper rod device and method using same for absorbing inclusions at gate |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105935749A (en) * | 2016-06-28 | 2016-09-14 | 山东钢铁股份有限公司 | Method for eliminating flocculating flow blocking of upper nozzle of tundish |
| CN106493347B (en) * | 2016-10-25 | 2018-07-06 | 华北理工大学 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
| CN108176844B (en) * | 2018-01-15 | 2019-07-05 | 山东钢铁股份有限公司 | A kind of device and method for clearing up tundish upper nozzle dross object |
| CN109226731B (en) * | 2018-09-07 | 2021-03-02 | 宁国市宏达电炉有限公司 | Bottom pouring intermediate frequency holding furnace with automatic sprue gate cleaning function |
| CN110218835A (en) * | 2019-06-06 | 2019-09-10 | 山东钢铁股份有限公司 | The device and smelting process of inclusion removal under a kind of slag interface |
| CN112024865B (en) * | 2020-11-03 | 2021-02-02 | 北京科技大学 | Stopper rod, tundish and method for removing inclusions in liquid metal |
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