CN106180597A - A kind of device and method carrying out magnesium process in tundish - Google Patents
A kind of device and method carrying out magnesium process in tundish Download PDFInfo
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- CN106180597A CN106180597A CN201610783020.XA CN201610783020A CN106180597A CN 106180597 A CN106180597 A CN 106180597A CN 201610783020 A CN201610783020 A CN 201610783020A CN 106180597 A CN106180597 A CN 106180597A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
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- Manufacture And Refinement Of Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention belongs to technical field of ferrous metallurgy, relate to a kind of device and using method carrying out magnesium process at tundish.The device of magnesium process is carried out at tundish, it is positioned at tundish bottom, including air brick (1) and electric heating vaporizer (2), air brick (1) is embedded in tundish bottom, the working lining of close source of the gas sidewall, tundish permanent layer below air brick builds electric heating vaporizer by laying bricks or stones, and vaporizer is connected with the winding-up pipeline of embedment in tundish permanent layer.The method that the present invention also provides for including the tundish of the above-mentioned device carrying out magnesium process at tundish and carrying out magnesium process at tundish.Present device is simple, and magnesium processes and can carry out smoothly, and the recovery rate of magnesium can reach more than 40%, and reduces inclusion content in melting steel content more than 20%.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, in particular it relates to one carries out magnesium process at tundish
Device and using method.
Background technology
Magnesium metal has extremely strong deoxidation, desulphurizing ability, has (1873K, magnesium more higher than calcium dissolubility in liquid steel
In carbon saturated ferrum liquid, dissolubility is 0.0532%, and calcium is 0.03%).Magnesium deoxidation products discreteness is good, MgO interparticle attraction
It is about Al2O3The 1/10 of interparticle attraction, deoxidation products is difficult to polymerization.Magnesium processes and T.O in steel can be made to reduce, and promotes cluster shape
Al2O3Field trash becomes tiny, the MgO Al of disperse2O3Field trash, cluster shape Al2O3Inclusion size typically at more than 20um,
Large-scale cluster shape Al2O3Inclusion size even can reach more than 100um, MgO Al2O3Inclusion size is generally less than 6um,
So using magnesium to process can reduce inclusion size greatly.The magnesium system deoxidation products of disperse can be nitridation during solidification of molten steel
Thing, sulfide provide homogeneous nucleation point, and inclusion size significantly refines, and the oxide of disperse is mingled with and can also weld
Pinning crystal boundary in journey, effectively facilitates Intragranular Acicular Ferrite forming core, significantly improves the toughness of welding heat affected zone.Magnesium processes improving steel
The effect of iron product performance has obtained the affirmative of lot of domestic and foreign researcher.But magnesium metal is extremely active, and boiling point is 1107 DEG C,
Vapour pressure is high (in 1873K ferrum liquid, saturated vapor pressure is about 2.02MPa), add deoxygenation of liquid steel and easily set off an explosion and splash accident,
Utilization rate is relatively low.After the method that the most domestic and international steel mill carries out magnesium process is refinement and deoxidation alloying, the mode using line feeding will
Magnesia alloy wire passes rapidly through slag blanket feeding ladle bottom, overcomes the high-vapor-pressure of magnesium with ferrostatic pressure, to improve recovery rate.
But owing to refining time is nervous, the time leaving magnesium process in actual refining process for only has 3～5 minutes, thus must this 3～
Within 5 minutes, in whole magnesia alloy wire feeding molten steel, this instantaneous feeding speed that certainly will cause magnesia alloy wire is excessive, by
In molten steel, the instantaneous content of magnesium vapor is excessive, and substantial amounts of magnesium vapor is not able to do in time to be mingled with reaction with Al2O3 and just overflows ladle
Outward, the utilization rate of magnesium vapor is on the low side.
CN202447616U discloses a kind of single current wide and thick slab tundish air curtain barricade wall, is being provided with together at the bottom of tundish bag
The air curtain barricade wall built by laying bricks or stones with magnesia dispersive air brick, the tunger tube one end being embedded in tundish containment wall coating connects air curtain
Barricade, the other end draw tundish bag along on tunger tube by snap joint and connection by metal hose, metal hose another
End is connected with spinner flowmeter, regulation valve, air relief valve successively, and air relief valve is connected on stable-pressure device.Air curtain barricade wall is used to show
Write the cleanliness factor improving molten steel, [O] content be reduced to 11.3ppm by 14.5ppm,；Micro inclusions total amount by 7.92/
Mm2 is reduced to 6.04/mm2；Oxide total inclusion content is reduced to 0.0046% from 0.0062%；Large Inclusions from
5.79mg/10kg be reduced to 4.16mg/10kg.Field trash can be promoted floating-upward process from the argon of disperse air brick blowout
Growing up removal, air curtain barricade wall technology can improve Tundish Flow Field simultaneously, but argon is owing to being noble gas, will not be with field trash
React, it is impossible to play the effect of Oxide Metallurgy.The document of the openest report does not the most process magnesium and air curtain keeps off
The technology that wall technology combines.
Summary of the invention
For solving problem above, the present invention provides a kind of apparatus and method carrying out magnesium process at tundish, utilizes inertia
Magnesium powder is jetted in tundish vaporizer by carrier gas, and magnesium powder is Quick-gasifying in vaporizer, and the magnesium steam bubble of generation is by ventilative
Brick enters in molten steel, with Al in magnesium vapor bubble floating-upward process2O3Generate, etc. being mingled with to react, the field trash that size is tiny, play
Refinement is mingled with and the effect of sulfide nodularization, and noble gas and magnesium vapor play the effect of air curtain barricade wall in floating-upward process
Really, can dross inclusion adsorption and improve Tundish Flow Field, and all molten steel is carried out magnesium process in whole casting process, magnesium powder
Instantaneous feed quantity is little, and in molten steel, the instantaneous content of magnesium vapor is the least, magnesium vapor meeting and Al2O3React smoothly etc. being mingled with, Du
Absolutely blast and splash accident, can improve the utilization rate of magnesium vapor.
The present invention provides a kind of device and using method carrying out magnesium process at tundish, and concrete device is as it is shown in figure 1, wrap
Include 1 air brick, 2 electric heating vaporizers, 3 heating resistor rods, 4, bakie working lining, 5, tundish permanent layer, 6, winding-up pipeline,
7, effusion meter, 8, Pressure gauge, 9 buffering gas tanks, 10 valves, 11 powder spraying systems, 12 power supplys, L be air brick length, W be air brick
Width, H are air brick height.
The present invention provides a kind of device carrying out magnesium process at tundish, is positioned at tundish bottom, including air brick (1) and
Electric heating vaporizer (2), air brick (1) is embedded in tundish bottom, near the working lining of source of the gas sidewall, below air brick in
Between bag permanent layer build electric heating vaporizer by laying bricks or stones, vaporizer is connected with the winding-up pipeline of embedment in tundish permanent layer.
Preferably, described air brick is magnesium carbonaceous air brick, and described air brick is disperse formula or slot-type ventilating brick.
Preferably, the upper ventilative face of air brick flushes with or slightly higher than bakie working lining upper surface, air brick lower surface with
Tundish permanent layer contacts, and air brick width is 5-15cm, and air brick length is identical with the width of the working lining of tundish bottom.
Owing to the upper ventilative face of air brick flushes with or slightly higher than bakie working lining upper surface, air brick lower surface and tundish permanent layer
Contact, so the height of air brick approximates the thickness of bakie working lining.
Preferably, described vaporizer is electric heating vaporizer；Vaporizer is built by laying bricks or stones with magnesia carbon refractory, vaporizer height
For 5-15cm, the width of vaporizer and length are slightly less than width and the length of air brick.The width of described vaporizer and length
Being slightly less than width and the length of air brick, those skilled in the art can set according to practical situation, the width of such as vaporizer
With width and the length 0.1～3cm that length is less than air brick；The width of such as vaporizer and length less than air brick width and
Length 0.1cm, 0.3cm, 0.5cm, 0.7cm, 0.9cm, 1cm, 1.2cm, 1.4cm, 1.6cm, 1.8cm, 2cm, 2.2cm,
2.4cm, 2.6cm, 2.8cm and the scope of above-mentioned any two numerical value composition.
Preferably, at gasification 1-15 electric heating type resistor rod of indoor location.It is furthermore preferred that resistor rod material is carbon silicon
Matter, resistor rod uses external power source to provide electric energy.
The present invention also provides for a kind of tundish, including the above-mentioned device carrying out magnesium process at tundish, it is characterised in that
Tundish bottom and bakie working lining embedment air brick (1) near source of the gas sidewall, below air brick
Tundish permanent layer (5) is built by laying bricks or stones vaporizer (2), in tundish permanent layer (5), imbeds a winding-up pipeline (6), injection tube
One end, road is connected with vaporizer (2), and the other end stretches out along sidewall permanent layer and is connected with powder spraying system (11).By winding-up pipeline
(6) winding-up magnesium powder in vaporizer (2), does carrier gas with argon.Preferably, the other end of winding-up pipeline stretches out along sidewall permanent layer
And be connected with powder spraying system (11) by tundish outflow gauge (7), Pressure gauge (8), buffering gas tank (9), valve (10).
Preferably, described air brick is magnesium carbonaceous air brick, and described air brick is disperse formula or slot-type ventilating brick.
Preferably, the upper ventilative plane of air brick is slightly above the upper surface of bakie working lining (4), under air brick (1)
Surface contacts with tundish permanent layer (5), and the width of air brick (1) is 5-15cm, the length of air brick (1) and tundish bottom
Working lining width is identical,
Preferably, described vaporizer is electric heating vaporizer；It is furthermore preferred that vaporizer (2) is built with magnesia carbon refractory
Building, the height of vaporizer (2) is 5-15cm, and the width of vaporizer (2) and length are slightly less than width and the length of air brick 1, with
Facilitate the installation of air brick and fix.
Preferably, internally installed 1-15 the electric heating type resistor rod (3) of vaporizer (2)；It is furthermore preferred that resistor rod
(3) material is that carbon is siliceous, and resistor rod (3) uses external power source (12) to provide electric energy, at the tundish near vaporizer (2)
Sidewall opens the hole connection that a hole, resistor rod (3) and power supply (12) are opened by tundish sidewall.
The present invention also provides for a kind of method carrying out magnesium process at tundish, comprises the following steps:
1), after tundish has been built by laying bricks or stones, continuous casting platform is hung,
2) use coal gas to dry bag 3-5 hour, turn on the power simultaneously, vaporizer is heated to more than 1150 DEG C,
3) after continuous casting is opened and watered, opening valve, set winding-up flow, powder spraying system is blown into gas noble gas and magnesium powder
Changing room, wherein the winding-up flow of argon is 3～20NL/Min, and the speed that sprays into of magnesium powder is 3～500g/Min.Magnesium is in vaporizer
Being gasified, magnesium vapor and argon are blown in tundish by air brick, and the Argon Bubble of even dispersion and magnesium bubble are from air brick
Surface is overflowed, and magnesium bubble reacts with field trash, MgO, MgO Al of generation2O3Inclusion diameter is respectively less than 6um, and size is thin
Little, the MgS of generation is mingled with for spherical sulfide, and during steel plate rolling, MgS is mingled with along steel plate rolling Direction distortion less, sulfur after rolling
The length/width ratio of compound is less, advantageously reduces steel plate anisotropy, MgO, MgO Al2O3Solidification of molten steel process can be become
The forming core particle of middle sulfide, the precipitation of beneficially I, III class sulfide.
NL/Min is flux unit, refers to that gas flow per minute under the status of criterion rises number.
Working lining at tundish bottom and close source of the gas sidewall is slotted and embeds magnesium carbonaceous air brick, and described air brick is
Disperse formula or slot-type ventilating brick, the upper ventilative face of air brick flushes with or slightly higher than bakie working lining upper surface, under air brick
Surface contacts with tundish permanent layer, and air brick width is 5-15cm, the width of the working lining of air brick length and tundish bottom
Spending identical, the tundish permanent layer below air brick builds electric heating vaporizer by laying bricks or stones, and vaporizer is built by laying bricks or stones with magnesia carbon refractory,
Vaporizer height is 5-15cm, and the width of vaporizer and length are slightly less than width and the length of air brick, to facilitate air brick
Installing fixing, at gasification 1-15 electric heating type resistor rod of indoor location, resistor rod material is that carbon is siliceous, and resistor rod uses outside
Power supply provides electric energy, opens a hole, resistor rod and power supply at the tundish sidewall near vaporizer and is opened by tundish sidewall
Hole connect；Imbedding a winding-up pipeline in tundish permanent layer, winding-up pipeline one end is connected with vaporizer, other end edge
Sidewall permanent layer is stretched out and the effusion meter, Pressure gauge, buffering gas tank, the valve that pass through outside tundish is connected with powder spraying system.Dust
System is jetted magnesium powder by winding-up pipeline in vaporizer, does carrier gas with noble gas.
After tundish as shown in Figure 1 has been built by laying bricks or stones, hang continuous casting platform, before beginning to use, use coal gas to dry bag 3-5 little
Time, turning on the power simultaneously, vaporizer is heated to more than 1150 DEG C, continuous casting is opened after watering, and opens valve, sets winding-up flow,
Powder spraying system is blown into vaporizer noble gas and magnesium powder, and wherein the winding-up flow of argon is 3～20NL/Min, the spray of magnesium powder
Entering speed is 3～500g/Min, and magnesium is gasified in vaporizer, and magnesium vapor and argon are blown in tundish by air brick,
Argon Bubble and the magnesium bubble of even dispersion overflow from air brick surface, and magnesium bubble and field trash occur following the most 3. formula to react,
MgO, MgO Al generated2O3Inclusion diameter is respectively less than 6um, and size is tiny, and the MgS of generation is mingled with for spherical sulfide, steel plate
During rolling, MgS is mingled with along steel plate rolling Direction distortion less, and the length/width ratio of rolling after cure thing is less, advantageously reduces steel
Plate anisotropy, MgO, MgO Al2O3The forming core particle of sulfide, beneficially I, III class sulfur during solidification of molten steel can be become
The precipitation of compound.
3Mg+Al2O3=3MgO+2Al is 1.
MgO+Al2O3=MgO Al2O3 ②
Mg+S=MgS is 3.
Inert gas bubbles and magnesium vapor are steeped oneself-meeting and are formed air curtain in tundish, play the effect of air curtain barricade wall, can improve steel
Liquid mobility, promotes molten steel to raise up flowing, decreases the generation of molten steel short-circuit flow.The buoyancy of bubble produces the phenomenon of airlift pump,
The collision being conducive to field trash is removed, and bubble with capture clip foreign material, and can drive inclusion floating to remove in floating-upward process.
Advantages of the present invention
1, the present invention carries out magnesium process in tundish, can be carried out magnesium and process in whole casting process, and magnesium processes
Time is long, sprays into the magnesium powder amount in molten steel the fewest in the corresponding unit interval, and magnesium processes and can carry out smoothly, can improve magnesium
Recovery rate, the recovery rate of magnesium can reach more than 40%.
2, magnesium is processed by the present invention and air curtain barricade wall technology carries out Integration ofTechnology, and the advantage of both technology is combined,
Play refinement field trash, sulfide nodularization, improve Tundish Flow Field structure, the effect promoting the floating of field trash to remove, can disappear
Except the large scale of more than 10um is mingled with, and reduce inclusion content in melting steel content more than 20%.
3, present device is simple, carries out less change at former tundish and just can realize this technology, it is not necessary to complicated
With expensive equipment.
Accompanying drawing explanation
Fig. 1 is a kind of device schematic diagram carrying out magnesium process at tundish.
Fig. 2 is the partial enlarged drawing of the AA section of Fig. 1.
Detailed description of the invention
Hereinafter citing adapting device schematic diagram 1,2 carry out the device of magnesium process and using method is done to a kind of at tundish
Further illustrate.
Embodiment 1
Make a device carrying out magnesium process at tundish as shown in Figure 1, at tundish bottom with near source of the gas side
The bakie working lining fluting embedment magnesium carbonaceous air brick 1 of wall, described air brick is disperse formula air brick, and the upper of air brick is breathed freely
Plane is slightly above the upper surface of bakie working lining 4, and the lower surface of air brick 1 contacts with tundish permanent layer 5, air brick 1
Width is 10cm, and the length of air brick 1 is identical with tundish bottom working lining width, permanent at the tundish below air brick
Building electric heating vaporizer 2 by laying bricks or stones in layer 5, vaporizer 2 is built by laying bricks or stones with magnesia carbon refractory, and the height of vaporizer 2 is 8cm, vaporizer 2
Width and length be slightly less than width and the length of air brick 1, to facilitate the installation of air brick and fixing, in vaporizer 2
10 electric heating type resistor rods 3 are installed in portion, and the material of resistor rod 3 is that carbon is siliceous, and resistor rod 3 uses external power source 12 to provide electricity
Can, open, at the tundish sidewall near vaporizer 2, the hole that a hole, resistor rod 3 and power supply 12 are opened by tundish sidewall
Connect；Imbedding a winding-up pipeline 6 in tundish permanent layer 5, winding-up pipeline one end is connected with vaporizer 2, and the other end is along side
Wall permanent layer stretches out and passes through tundish outflow gauge 7, Pressure gauge 8, buffering gas tank 9, valve 10 are connected with powder spraying system 11.Logical
Cross injection tube road 6 to jet in vaporizer 2 magnesium powder, do carrier gas with argon.
After tundish as implied above has been built by laying bricks or stones, hang continuous casting platform, before beginning to use, use coal gas to dry bag 3-5 little
Time, turn on the power 12 simultaneously, vaporizer is heated to 1200 DEG C standby.Molten steel does not carry out Calcium treatment, steel at refine station
Bag hangs in continuous casting station, opens after watering, and opens valve 10, and argon winding-up flow set is 5NL/Min, and the speed that sprays into of magnesium powder is
50g/Min, powder spraying system is blown into vaporizer argon and magnesium powder, and in vaporizer, magnesium is gasified, and magnesium vapor and argon pass through
Air brick is blown in tundish, and magnesium bubble occurs the reaction of above-mentioned the most 3. formula with field trash, plays inclusion modification
Effect, Argon Bubble and the magnesium bubble of even dispersion overflow from air brick surface, form air curtain barricade wall, play optimization Tundish Flow Field
Structure, promotes the effect of inclusion floating.By doing inclusion analysis in stocking sampling, field trash type is MgO, MgO
Al2O3, MgS class be mingled with, do not find cluster-shaped Al2O3Class is mingled with, MgO, MgO Al2O3Inclusion size is respectively less than 6um, in steel
Total oxygen content reduces by more than 20%, and sulphide inculsion is I, III class sulphide inculsion, does not finds that II class of intercrystalline precipitation is mingled with.
In tundish, carry out magnesium process serve good effect.
Embodiment 2
Other are with embodiment 1, and difference is:
Air brick width is 5cm, and vaporizer height is 5cm, at gasification 1 electric heating type resistor rod of indoor location.
The width of vaporizer and length are less than width and length 0.1cm of air brick.
Use coal gas to dry bag 4 hours, turn on the power simultaneously, vaporizer is heated to 1150 DEG C.
Continuous casting is opened after watering, and opens valve, sets winding-up flow, and powder spraying system is blown into gasification noble gas and magnesium powder
Room, wherein the winding-up flow of argon is 3NL/Min, and the speed that sprays into of magnesium powder is 3g/Min.
Embodiment 3
Other are with embodiment 1, and difference is:
Air brick width is 15cm, and vaporizer height is 10cm, at gasification 5 electric heating type resistor rods of indoor location.
The width of vaporizer and length are less than width and length 0.3cm of air brick.
Use coal gas to dry bag 3 hours, turn on the power simultaneously, vaporizer is heated to 1180 DEG C.
Continuous casting is opened after watering, and opens valve, sets winding-up flow, and powder spraying system is blown into gasification noble gas and magnesium powder
Room, wherein the winding-up flow of argon is 10NL/Min, and the speed that sprays into of magnesium powder is 100g/Min.
Embodiment 4
Other are with embodiment 1, and difference is:
Air brick width is 7cm, and vaporizer height is 15cm, at gasification 15 electric heating type resistor rods of indoor location.
The width of vaporizer and length are less than width and length 0.5cm of air brick.
Use coal gas to dry bag 4 hours, turn on the power simultaneously, vaporizer is heated to 1230 DEG C.
Continuous casting is opened after watering, and opens valve, sets winding-up flow, and powder spraying system is blown into gasification noble gas and magnesium powder
Room, wherein the winding-up flow of argon is 20NL/Min, and the speed that sprays into of magnesium powder is 200g/Min.
Embodiment 5
Other are with embodiment 1, and difference is:
Air brick width is 12cm, and vaporizer height is 12cm, at gasification 8 electric heating type resistor rods of indoor location.
The width of vaporizer and length are less than width and length 2cm of air brick.
Use coal gas to dry bag 5 hours, turn on the power simultaneously, vaporizer is heated to 1250 DEG C.
Continuous casting is opened after watering, and opens valve, sets winding-up flow, and powder spraying system is blown into gasification noble gas and magnesium powder
Room, wherein the winding-up flow of argon is 15NL/Min, and the speed that sprays into of magnesium powder is 500g/Min.
Claims (10)
1. carry out a device for magnesium process at tundish, be positioned at tundish bottom, including air brick (1) and electric heating vaporizer
(2), air brick (1) is embedded in tundish bottom, the working lining of close source of the gas sidewall, and the tundish permanent layer below air brick is built
Building vaporizer, vaporizer is connected with the winding-up pipeline of embedment in tundish permanent layer.
2. tundish as claimed in claim 1 carries out the device of magnesium process, it is characterised in that described air brick is that magnesium carbonaceous is saturating
Gas brick.
3. tundish as claimed in claim 1 or 2 carries out the device of magnesium process, it is characterised in that described air brick is disperse
Formula or slot-type ventilating brick.
4. tundish as claimed in claim 1 or 2 carries out the device of magnesium process, it is characterised in that the upper ventilative face of air brick
Flushing with or slightly higher than bakie working lining upper surface, air brick lower surface contacts with tundish permanent layer, and air brick width is 5-
15cm, air brick length is identical with the width of the working lining of tundish bottom.
5. the tundish as described in any one of Claims 1 to 4 carries out the device of magnesium process, it is characterised in that described vaporizer
For electric heating vaporizer；Vaporizer is built by laying bricks or stones with magnesia carbon refractory, and vaporizer height is 5-15cm, the width of vaporizer and length
Degree is slightly less than width and the length of air brick.
6. the tundish as described in any one of Claims 1 to 5 carries out the device of magnesium process, it is characterised in that in vaporizer
1-15 electric heating type resistor rod is installed；Resistor rod material is that carbon is siliceous, and resistor rod uses external power source to provide electric energy.
7. a tundish, including the device carrying out magnesium process at tundish described in any one of claim 1～6, its feature
It is,
Tundish bottom and bakie working lining embedment air brick (1) near source of the gas sidewall, in the centre below air brick
Bag permanent layer (5) is built by laying bricks or stones vaporizer (2), in tundish permanent layer (5), imbeds a winding-up pipeline (6), pipeline one of jetting
End is connected with vaporizer (2), and the other end stretches out along sidewall permanent layer and is connected with powder spraying system (11)；By winding-up pipeline (6)
In vaporizer (2), winding-up magnesium powder, does carrier gas with argon；Preferably, the other end of winding-up pipeline stretches out also along sidewall permanent layer
It is connected with powder spraying system (11) by tundish outflow gauge (7), Pressure gauge (8), buffering gas tank (9), valve (10).
8. tundish as claimed in claim 7, it is characterised in that the upper ventilative plane of air brick is slightly above bakie working lining
(4) upper surface, the lower surface of air brick (1) contacts with tundish permanent layer (5), and the width of air brick (1) is 5-15cm, thoroughly
The length of gas brick (1) is identical with tundish bottom working lining width.
9. tundish as claimed in claim 7, it is characterised in that described vaporizer is electric heating vaporizer；It is furthermore preferred that gas
Changing room (2) to build by laying bricks or stones with magnesia carbon refractory, the height of vaporizer (2) is 5-15cm, and width and the length of vaporizer (2) are smaller
Width and length in air brick 1；
Internally installed 1-15 electric heating type resistor rod (3) at vaporizer (2)；The material of resistor rod (3) is that carbon is siliceous, resistance
Rod (3) uses external power source (12) to provide electric energy, opens a hole, resistor rod at the tundish sidewall near vaporizer (2)
(3) connect with the hole opened by tundish sidewall of power supply (12).
10. the method carrying out magnesium process at tundish, comprises the following steps:
1), after tundish has been built by laying bricks or stones, continuous casting platform is hung,
2) use coal gas to dry bag 3-5 hour, turn on the power simultaneously, vaporizer is heated to more than 1150 DEG C,
3) after continuous casting is opened and watered, opening valve, set winding-up flow, powder spraying system is blown into gasification noble gas and magnesium powder
Room, wherein the winding-up flow of argon is 3～20NL/Min, and the speed that sprays into of magnesium powder is 3～500g/Min.
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| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding device protected by double-layer air curtain |
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| CN100467622C (en) * | 2006-11-24 | 2009-03-11 | 周建安 | Molten steel desulfurizing process of bottom blowing superfine magnesium powder |
| CN101574730B (en) * | 2009-06-16 | 2011-11-16 | 武汉科技大学 | Method for cleaing molten steel for continuous casting tundish by air curtain retaining wall method |
| CN102399944A (en) * | 2011-12-29 | 2012-04-04 | 天津市万路科技有限公司 | Desulfurization treatment method for molten iron |
| CN103555889B (en) * | 2013-10-24 | 2015-05-27 | 钢铁研究总院 | Device and method for quickly removing occluded foreign substances in molten steel |
| CN206047038U (en) * | 2016-08-31 | 2017-03-29 | 山东钢铁股份有限公司 | A kind of device and tundish that magnesium process is carried out in tundish |
-
2016
- 2016-08-31 CN CN201610783020.XA patent/CN106180597B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding device protected by double-layer air curtain |
| CN115161433B (en) * | 2022-07-22 | 2023-12-15 | 北京科技大学 | Ladle wire feeding device with double-layer air curtain protection |
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| CN106180597B (en) | 2018-03-09 |
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