CN108285947A - A kind of molten steel alloyage process in protection tapping process - Google Patents
A kind of molten steel alloyage process in protection tapping process Download PDFInfo
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- CN108285947A CN108285947A CN201710111338.8A CN201710111338A CN108285947A CN 108285947 A CN108285947 A CN 108285947A CN 201710111338 A CN201710111338 A CN 201710111338A CN 108285947 A CN108285947 A CN 108285947A
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- molten steel
- tapping
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses the molten steel alloyage process in a kind of protection tapping process, Ferrous Metallurgy steelmaking technical fields.The present invention is moved to tapping hole lower part first, by molten steel alloying device, and ladle tank is made to be located at tapping hole lower part；Secondly it, smelts electric furnace ontology when completing to tilt, the tapping protection pipe of molten steel alloying device is matched with tapping hole, the supporting plate for opening tapping hole starts to tap, and molten steel flow to ladle tank under the protective effect of tapping protection pipe by tapping hole；Finally, material alloying device is moved to the top of ladle tank, and alloy material is added into the molten steel of ladle tank from material alloying device, carries out molten steel alloying.The gas flowing for limiting molten steel surface of the present invention, alloy material is added in ladle and carries out alloying, adsorbance of the molten steel to pernicious gases such as nitrogen hydrogen in reduction tapping, alloying process, and the flowing of molten steel promotes alloying element being uniformly distributed in molten steel, the effect of the alloying of molten steel is improved, and then improves the quality of steel alloy.
Description
Technical field
The present invention relates to Ferrous Metallurgy steelmaking technical fields, more specifically to the steel in a kind of protection tapping process
Water alloyage process.
Background technology
Molten steel oxygen during external refining and continuous casting process are to steel after electric furnace smelting is tapped, nitrogen, hydrogen and temperature control very
Strictly.But molten steel is directly contacted with air in tapping process, enters molten steel so as to cause pernicious gases such as a large amount of nitrogen hydrogen,
Nitrogen is the harmful element in general steel grade, and in tapping process, exposed molten steel is in direct contact with air, to increase in molten steel
Nitrogen content, generally increase 10-20ppm.Because containing certain humidity in air, molten steel hydrogenation is will also result in, hydrogen holds in steel
It is also easy to produce white point, steel is made to generate hydrogen induced cracking；Reduce product quality.Moreover, especially adding in ladle after molten steel tapping
Enter alloy material carry out deoxidation alloying when, due to alloy part element (such as：Al, Nb, V, Ti) easily with the N element knot in molten steel
Conjunction forms nitride or carboritride, and then the severe exacerbation performance of steel, is pressed for follow-up external refining and continuous casting belt
Power, and production cost is considerably increased, reduce the quality of molten steel after alloying.It is badly in need of for the tapping of existing molten steel, alloying
Technique is developed during tapping and alloying, is protected to molten steel, improve the quality of alloying molten steel, and designs
Go out a kind of molten steel alloyage process of protection tapping process.
In addition, the influence to temperature is very big, this process probably continues 4-6 minutes, and in tapping process, molten steel is because of hot spoke
Penetrate, heat loss through convection, deoxidation alloying, ladle liner heat absorption etc. cause liquid steel temperature to reduce.For this purpose, being added using alloy in production
Heat, ladle baking and Optimized Operation etc. reduce the temperature drop in tapping process.But the radiation generated between molten steel and air dissipates
Heat and heat loss through convection do not take any measure, cause molten steel heat dissipation serious, are difficult to effectively control so as to cause molten steel temperature drop.
It is found through retrieval, in casting process, protection pipe has been used to protect molten steel, such as：The title of innovation and creation
For：Compound molten-steel protection casing tube (the patent No.：ZL99229239.5, the applying date：1999-08-20), the title of innovation and creation
For：It is a kind of be used for pouring molten steel when anti-nitrogen pick-up protection pipe (number of patent application：ZL201520734792.5, the applying date：2015-
09-22).But this protection pipe is but difficult to protect molten steel in tapping process.
In addition, innovation and creation is entitled：A kind of method (patent application preventing molten steel nitrogen pick-up in converter tapping process
Number：201010588760.0 the applying date：2010-12-15), it takes before converter tapping and in tapping process, when controlling Argon
Between and argon flow amount, be divided to two sections or be uninterruptedly blown into argon gas into ladle, until tapping terminate.To make in ladle
The argon gas discharge that air is blown into, the molten steel to ladle that prevents from tapping are contacted with air, and the molten steel in ladle is made to be in always
Argon gas guard mode, nitrogen pick-up caused by both preventing molten steel from being contacted with air, while making easily to be adsorbed on bubble surface in molten steel
[N] can be removed as the floating of Argon Bubble is discharged.Although this method can prevent molten steel nitrogen pick-up to a certain extent,
It is but to be difficult to realize carry out alloying during protecting tapping, still it is easier that alloying element and nitrogen member during tapping
Element forms nitride or carboritride.
Invention content
1. technical problems to be solved by the inivention
It is an object of the invention to overcome the problems, such as that quality of molten steel reduces after molten steel tapping, alloying in the prior art,
A kind of molten steel alloyage process protected in tapping process is provided, tapping protection pipe can protect molten steel in tapping process
Shield, material alloying device can carry out alloying, reduce absorption of the molten steel to pernicious gases such as nitrogen hydrogen in tapping, alloying process
Amount, can improve steel quality；It is possible to further reduce molten steel heat loss, steel-making energy consumption is reduced.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
Ladle tank is moved to by the molten steel alloyage process in a kind of protection tapping process of the present invention, electric furnace before tapping
Tapping hole lower part, and tapping protection pipe is assemblied on tapping hole, molten steel is under the protective effect of tapping protection pipe by tapping hole
It is flow to ladle tank, then alloy material is added into the molten steel of ladle tank, alloying is carried out to molten steel.
Preferably, specific steps are as follows：
Molten steel alloying device is moved to tapping hole lower part, and makes ladle by 2-5min before S1, electric furnace smelting are completed
Tank is located at tapping hole lower part；
S2, electric furnace ontology inclination when completing is smelted, the tapping protection pipe of molten steel alloying device is matched with tapping hole,
The supporting plate for opening tapping hole starts to tap, and molten steel flow to ladle tank under the protective effect of tapping protection pipe by tapping hole；
S3, the top that material alloying device is moved to ladle tank, and conjunction is added into the molten steel of ladle tank from material alloying device
Gold material, carries out molten steel alloying.
Preferably, the step S2 is as follows：Tilting equipment, electric furnace ontology is driven to exist again when smelting completion
Run-off the straight under the action of eccentric furnace bottom, molten steel is flowed by tapping hole in tapping protection pipe in tapping process, and tapping protection pipe exists
Molten steel is protected during tapping, the internal diameter of the protection sleeve pipe of the tapping protection pipe is more than the diameter of tapping hole, steel
There is gap between the inner wall of protection sleeve pipe when water flows through protection sleeve pipe.
Preferably, the step S3 is as follows：When tap 30%-40% when, material alloying device is by alloy
Material is added to the lower part for protection pipe of tapping, and alloy material is rapidly scattered in molten steel under the action of molten steel stirs, and completes molten steel
Alloying.
Preferably, the molten steel alloying device includes buggy ladle, tapping protection pipe and material alloying device, the steel
Include protection pipe regulation and control unit, feeder regulation and control unit and ladle tank；Above-mentioned tapping protection pipe is installed on protection pipe tune
It controls on unit, protection pipe regulates and controls position of the unit for regulating and controlling tapping protection pipe, and tapping protection pipe is for right in tapping process
Molten steel is protected；Above-mentioned material alloying device is installed on feeder regulation and control unit, and feeder regulates and controls unit for regulating and controlling to close
The position of golden feeder, material alloying device into ladle tank for being added alloy material.
Preferably, the tapping protection pipe includes protection sleeve pipe and connecting sleeve, and the connecting sleeve is used for and goes out
Steel mouth connects；The cannula inlet port end of the protection sleeve pipe is connected with connecting sleeve, and constitutes the tapping protection pipe of perforation, described
Protection sleeve pipe internal diameter be more than tapping hole diameter, between having between the inner wall of protection sleeve pipe when molten steel flows through protection sleeve pipe
Gap.
Preferably, protection pipe regulation and control unit is identical with feeder regulation and control cellular construction comprising vertical telescopic machine
Structure, horizontal extension mechanism and rotating mechanism, the vertical telescoping mechanism are fixedly installed on buggy ladle, and horizontal extension mechanism is logical
Rotating mechanism rotational installation is crossed in the top of vertical telescoping mechanism.
Preferably, the protection sleeve pipe is conical pipe, and the internal diameter at the cannula inlet port end of protection sleeve pipe goes out less than casing
The internal diameter at mouth end, and the internal diameter at cannula inlet port end is more than the diameter of tapping hole.
Preferably, the tube wall of the protection sleeve pipe sets gradually shell, thermal insulation layer and refractory material layer from outside to inside.
Preferably, be provided with mounting structure at the top of the connecting sleeve, the mounting structure include boot segment and
Vertical section, boot segment make tapping hole location fit in vertical section for guiding connecting sleeve to be matched with tapping hole.
3. advantageous effect
Using technical solution provided by the invention, compared with existing known technology, there is following remarkable result：
(1) the molten steel alloyage process in a kind of protection tapping process of the invention, when tapping by tap protection pipe with
Tapping hole matches, and tapping protection pipe establishes relatively closed molten steel channel, and molten steel is flowed into tapping protection pipe by tapping hole, had
The gas flowing of molten steel surface is limited to effect, the pernicious gas limited in air is spread into molten steel, and molten steel enters ladle
Afterwards, alloy material is added in ladle and carries out alloying by material alloying device, and reducing molten steel in tapping, alloying process has nitrogen hydrogen etc.
The adsorbance of evil gas, and the flowing of molten steel promotes alloying element being uniformly distributed in molten steel, improves the conjunction of molten steel
The effect of aurification, and then improve the quality of steel alloy；
(2) the molten steel alloyage process in a kind of protection tapping process of the invention, tap 30%-40% when, alloy adds
Alloy material is added to the lower part of tapping protection pipe glassware, and the molten steel of tapping protection pipe outflow can be stirred alloy material, add
The alloy material entered in ladle tank is rapidly melted in molten steel under the impact of molten steel, and the quick flowing and impact of molten steel promote
Alloying element being uniformly distributed in molten steel, and then improve the quality of steel alloy；
(3) the molten steel alloyage process in a kind of protection tapping process of the invention, the protection sleeve pipe for protection pipe of tapping
Internal diameter is more than the diameter of tapping hole, has gap when molten steel being made to flow through protection sleeve pipe between the inner wall of protection sleeve pipe, in tapping
In the process, the gap of molten steel and protection sleeve pipe inner wall forms good heat preservation void layer, has good heat insulation effect to molten steel,
The heat loss of molten steel is reduced, and avoids molten steel directly washing away to protection sleeve pipe inner wall, substantially increases service life；
(4) the molten steel alloyage process in a kind of protection tapping process of the invention is provided with steel ladle cover, steel on ladle tank
Be provided on backpack cover with the matched alloy material mouth of material alloying device, be additionally provided on steel ladle cover matched with tapping protection pipe
Molten steel introducing port, steel ladle cover reduce the gas flowing in ladle tank, weaken to being protected to entering the molten steel in ladle tank
Molten steel adsorbs pernicious gas in alloying process, and then improves the quality of molten steel；
(5) the molten steel alloyage process in a kind of protection tapping process of the invention, the tube wall of protection sleeve pipe is from outside to inside
Shell, thermal insulation layer and refractory material layer are set gradually, the heat-barrier material of thermal insulation layer can effectively limit molten steel in protection sleeve pipe
Heat to protection sleeve pipe external cooling, reduce the temperature loss in tapping process, and then tapping temperature can be reduced, save
Make steel energy consumption；
(6) the molten steel alloyage process in a kind of protection tapping process of the invention, be provided on connecting bottom board accommodate it is recessed
Slot, the pockets are set to the circumferential edges position of connecting bottom board, tapping hole filler in by tapping hole pipeline splash and go out
When, tapping hole filler will be injected in the pockets of connecting bottom board, reduce the quality that tapping hole filler is fallen into ladle tank,
Influence that can be to avoid tapping hole filler to steel quality, while filler is avoided to the influence during alloying, it improves
The smelting quality of molten steel；
(7) the molten steel alloyage process in a kind of protection tapping process of the invention, under the mounting structure of connecting sleeve
Portion is provided with limiting plate, limits gas and convection current occurs in molten steel surface, it is suppressed that gas violent flow in protection sleeve pipe, into
And limit the pernicious gas in air and spread into molten steel, molten steel heat loss is effectively reduced, reduces in tapping process and produces
Raw molten steel temperature drop.
Description of the drawings
Fig. 1 is the structural schematic diagram of the tapping protection pipe of the present invention；
Fig. 2 is the structural schematic diagram of the tapping protection pipe protection sleeve pipe of the present invention；
Fig. 3 is the structural schematic diagram of the pockets of the present invention；
Fig. 4 is the diagrammatic cross-section of the tapping protection pipe with mounting structure of the present invention；
Fig. 5 is the molten steel alloying device overall structure diagram of the present invention；
Fig. 6 is the overall structure diagram of the embodiment of the present invention 7；
Fig. 7 is the structural schematic diagram of the steel ladle cover of the present invention；
Fig. 8 is the structural schematic diagram of the electric furnace steel-making system of the present invention；
Fig. 9 is the flow chart of the molten steel alloyage process in a kind of protection tapping process of the present invention.
Label declaration in schematic diagram：
100, protection sleeve pipe；101, refractory material layer；102, thermal insulation layer；103, void layer；104, shell；110, casing enters
Mouth end；120, cannula exit end；
200, connecting sleeve；210, accommodating chamber；220, connecting bottom board；221, pockets；222, groove slant face；230、
Mounting structure；231, boot segment；232, vertical section；240, limiting plate；241, limiting through hole；
300, buggy ladle；310, car bottom plate is transported；321, protection pipe regulates and controls unit；322, feeder regulates and controls unit；301、
Vertical telescoping mechanism；302, horizontal extension mechanism；303, rotating mechanism；304, hold assembly；330, ladle tank；331, ladle
Lid；332, molten steel introducing port；333, entrance closing cover；334, hinge；335, alloy material mouth；336, material mouth covers；
400, electric furnace ontology；410, electric furnace steel tapping case；411, tapping hole；420, eccentric furnace bottom；430, tilting equipment；
500, material alloying device；510, feed bin；520, feeding tube.
Specific implementation mode
Hereafter to the detailed description of exemplary embodiment of the present invention with reference to attached drawing, which forms one of description
Point, it has been shown as example enforceable exemplary embodiment of the invention in the figure.Although these exemplary embodiment quilts
Fully describe in detail so that those skilled in the art can implement the present invention, it is to be understood that can realize other embodiment and
Can without departing from the spirit and scope of the present invention to the present invention various changes can be made.Hereafter to the embodiment of the present invention
More detailed description is not limited to required the scope of the present invention, and just to be illustrated and do not limit pair
The description of the features of the present invention and feature to propose to execute the best mode of the present invention, and is sufficient to make those skilled in the art
It can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.
Hereafter detailed description of the present invention and example embodiment are more fully understood in combination with attached drawing, wherein the present invention
Element and feature are identified by reference numeral.
Embodiment 1
As shown in figure 9, the molten steel alloyage process in a kind of protection tapping process of the present invention, electric furnace is before tapping by steel
Packet tank 330 is moved to 411 lower part of tapping hole, and tapping protection pipe is assemblied on tapping hole 411, and molten steel is in tapping protection pipe
Ladle tank 330 is flow to by tapping hole 411 under protective effect, then alloy material is added into the molten steel of ladle tank 330, molten steel is carried out
Alloying.The present invention specific steps are as follows：
Ladle tank 330 and tapping protection pipe are toasted during S1, electric furnace smelting, 2- before electric furnace smelting is completed
Molten steel alloying device is moved to 411 lower part of tapping hole, the preferred 2min of this implementation by 5min, and ladle tank 330 is made to be located at
411 lower part of steel mouth.
S2,400 inclination of electric furnace ontology when completing is smelted, by the tapping protection pipe of molten steel alloying device and tapping hole 411
It matches, the supporting plate for opening tapping hole 411 starts to tap, and molten steel is flowed under the protective effect of tapping protection pipe by tapping hole 411
To ladle tank 330；Tilting equipment 430, electric furnace ontology 400 is driven to be sent out under the action of eccentric furnace bottom 420 again when smelting completion
Raw to tilt, molten steel is flowed by tapping hole 411 in tapping protection pipe in tapping process, and tapping protection pipe is during tapping to steel
Water is protected, and the internal diameter of the protection sleeve pipe 100 of the tapping protection pipe is more than the diameter of tapping hole 411, and molten steel flows through protection
There is when casing 100 between the inner wall of protection sleeve pipe 100 gap；When molten steel tapping 96%, the support of tapping hole 411 is closed
Plate, electric furnace ontology 400 with 3 °/s return inclines to horizontal position, to avoid or reduce clinker flow into ladle, Jin Ershi from tapping hole 411
Existing slag free tapping.
Material alloying device 500 is moved to the top of ladle tank 330, and regulates and controls charging by S3, driving feeder regulation and control unit 322
Device regulates and controls unit 322 so that material alloying device 500 is inserted into ladle tank 330, when tap 30%-40% when, the present embodiment is preferred
33%, alloy material is added to the lower part of tapping protection pipe material alloying device 500, and alloy material is rapid under the action of molten steel stirs
Be scattered in molten steel, complete the alloying of molten steel.The flowing of molten steel promotes alloying element being uniformly distributed in molten steel, carries
The high quality of steel alloy so that the alloying element in molten steel is quickly uniformly distributed, and then improves the quality of molten steel.And
Reduce as far as possible alloying element (such as：Al, Nb, V, Ti) it is combined to form nitride or carbon nitrogen with the N element in molten steel
Compound, and then improve the quality of molten steel after alloying.
The electric furnace steel-making system of the present invention includes electric furnace ontology 400 and molten steel alloying device, is arranged on electric furnace ontology 400
There is tapping hole 411, the tapping protection pipe of the molten steel alloying device is matched with tapping hole 411, and electric furnace is during tapping
Molten steel is protected, and carries out molten steel alloying in ladle tank 330, flowing, the stirring of molten steel promote alloying element and exist
Being uniformly distributed in molten steel improves the quality of steel alloy.
Electric furnace ontology 400 includes electric furnace steel tapping case 410, eccentric furnace bottom 420 and tilting equipment 430, the electric furnace steel tapping
It is provided with tapping hole 411 on case 410, tilting equipment 430 is driven during tapping, electric furnace ontology 400 is in eccentric furnace bottom 420
Into line tilt under effect, and drive electric furnace steel tapping case 410 into line tilt simultaneously so that molten steel flow to electric furnace by electric furnace ontology 400
In steel box 410, the position of the then protection pipe regulation and control regulation and control tapping protection pipe of unit 321 so that tapping protection pipe and tapping hole
411 centerings, then drive vertical telescoping mechanism 301 so that the connecting sleeve 200 for protection pipe of tapping is matched with tapping hole 411；And
The supporting plate of tapping hole 411 is opened afterwards, and molten steel is flowed to by tapping hole 411 in tapping protection pipe, and in the protection of tapping protection pipe
It taps under effect.By tapping, protection pipe is matched with tapping hole 411, and it is logical that tapping protection pipe establishes relatively closed molten steel
Road, molten steel are flowed by tapping hole 411 in tapping protection pipe, are effectively limited the gas flowing of molten steel surface, are limited air
In pernicious gas spread into molten steel, reduce alloying element as far as possible and combined to form nitride with the N element in molten steel
Or carboritride, and then improve the quality of molten steel after alloying.And reduce the thermal loss of molten steel, it is basic herein
On, electric furnace production efficiency is improved, is shortened the heat, utilization rate of equipment and installations is improved；And due to reducing tapping temperature, to reduce
Erosion degree of the molten steel to electric furnace, extends electric furnace system service life of equipment.
In conjunction with Fig. 1 and Fig. 5, molten steel alloying device of the invention includes buggy ladle 300, tapping protection pipe and material alloying
Device 500, the buggy ladle 300 include transport car bottom plate 310, protection pipe regulation and control unit 321 and ladle tank 330 (such as Fig. 5 institutes
Show)；Wheel is installed on transport car bottom plate 310, is convenient for the movement of buggy ladle 300；The ladle tank 330 is fixedly installed on fortune
On defeated car bottom plate 310,330 opening upwards of ladle tank.
The structure that the protection pipe regulation and control unit 321 regulates and controls unit 322 with feeder is identical comprising vertical telescopic machine
Structure 301, horizontal extension mechanism 302 and rotating mechanism 303, the vertical telescoping mechanism 301 are fixedly installed in buggy ladle 300
It transports on car bottom plate 310, horizontal extension mechanism 302 is rotatablely installed by rotating mechanism 303 in the upper of vertical telescoping mechanism 301
Portion, under the action of rotating mechanism 303, horizontal extension mechanism 302 can be rotated centered on vertical telescoping mechanism 301, described
End set of the horizontal extension mechanism 302 far from vertical telescoping mechanism 301 has hold assembly 304, and the hold assembly 304 is for pressing from both sides
Hold tapping protection pipe.Protection pipe regulates and controls unit 321 and in the both sides of ladle tank 330, i.e., feeder regulation and control unit 322 is respectively arranged
Protection pipe regulates and controls unit 321 and the bottom of feeder regulation and control unit 322 is fixed on transport car bottom plate 310.
Above-mentioned tapping protection pipe is installed on protection pipe regulation and control unit 321, and protection pipe regulation and control unit 321 is for regulating and controlling out
The position of steel protection pipe, tapping protection pipe is for protecting molten steel in tapping process；Above-mentioned material alloying device 500 is pacified
Loaded on feeder regulation and control unit 322, feeder regulates and controls position of the unit 322 for regulating and controlling material alloying device 500, material alloying
For device 500 for alloy material to be added into ladle tank 330, which includes feed bin 510 and feeding tube 520,
Feed bin 510 is set to the top of feeding tube 520, and alloy material is added in feed bin 510, and alloy material can be by charge pipe
Road 520 is added into molten steel, and carries out alloying to molten steel.
In conjunction with shown in Fig. 1, tapping protection pipe includes protection sleeve pipe 100 and connecting sleeve 200, the protection sleeve pipe 100
Internal diameter be more than tapping hole 411 diameter, between having between the inner wall of protection sleeve pipe 100 when molten steel being made to flow through protection sleeve pipe 100
Gap；Connecting sleeve 200 offers accommodating chamber 210 for being connect with tapping hole 411 in connecting sleeve 200, the accommodating chamber 210
Outside for being sleeved on tapping hole 411.Moreover, the accommodating chamber 210 is cylindrical cavity, the internal diameter of cylindrical cavity is big
Internal diameter in cannula inlet port end 110.
The cannula inlet port end 110 of the protection sleeve pipe 100 of the present embodiment is connected with connecting sleeve 200, and constitutes going out for perforation
Steel protection pipe, when connecting sleeve 200 is sleeved on 411 outside of tapping hole, protection sleeve pipe 100 keeps coaxial with tapping hole 411, i.e.,
The axle center of protection sleeve pipe 100 is with the axle center of tapping hole 411 on same straight line.After opening tapping hole 411, molten steel is made in gravity
Under, molten steel flow to protection sleeve pipe 100 by tapping hole 411 through connecting sleeve 200, and the internal diameter of protection sleeve pipe 100 is more than tapping hole
411 diameter has gap when molten steel being made to flow through protection sleeve pipe 100 between the inner wall of protection sleeve pipe 100 so that molten steel not with guarantor
The inner wall of protecting pipe 100 contacts or molten steel is not exclusively contacted with the inner wall of protection sleeve pipe 100, to reduce molten steel to protecting
Washing away for 100 inner wall of protecting pipe, improves service life.
Under the guiding of prior art inertial thinking, often directed thinking thinks existing technical staff, in the mistake of tapping
It need not be protected in journey, even if having paid close attention to the protection in tapping process, it is also difficult to imagine using tapping protection pipe pair
Molten steel in tapping process is protected, therefore the tapping protection pipe in tapping process proposed by the present invention has broken the prior art
Technology prejudice, have significant progress.Even so, the molten steel in tapping process is protected even if there is technical staff to pay close attention to
Shield, then in order to improve the protecting effect in tapping process, prevents molten steel from being contacted with air, and existing technical staff often will
Protection sleeve pipe 100 is set as isometrical with tapping hole 411, to avoid in molten steel and the protection sleeve pipe 100 in protection sleeve pipe 100
Gap is generated between wall, because there is gap molten steel will necessarily be made to be contacted with air, in order to obtain preferable protecting effect, existing skill
Protection sleeve pipe 100 and tapping hole 411 are necessarily set as isometrical by the technical staff of art；But design but greatly reduces in this way
The service life of protection sleeve pipe 100 is not only not achieved preferable protecting effect, increases production cost instead.The invention
Property the internal diameter for proposing protection sleeve pipe 100 be more than tapping hole 411 diameter, when molten steel being made to flow through protection sleeve pipe 100 with protection
There is gap between the inner wall of casing 100, during tapping, avoid molten steel directly washing away to 100 inner wall of protection sleeve pipe,
To substantially increase service life.At the same time, it is empty to form good heat preservation for the gap of molten steel and 100 inner wall of protection sleeve pipe
Gap reduces the heat loss of molten steel with good heat insulation effect.
Protection sleeve pipe 100 is conical pipe, and the internal diameter at the cannula inlet port end 110 of protection sleeve pipe 100 is less than cannula exit end
120 internal diameter (as shown in Figure 1), and the internal diameter at cannula inlet port end 110 is more than the diameter of tapping hole 411；The present embodiment middle sleeve
The diameter for the tapping hole 411 that the internal diameter of arrival end 110 is 1.5 times；The tapping hole 411 that the internal diameter at cannula exit end 120 is 3.0 times
Diameter.The internal diameter that the internal diameter at cannula inlet port end 110 is less than cannula exit end 120 effectively limits cross-ventilation, prevents sky
Gas violent flow in protection sleeve pipe 100, tapping protection pipe establish relatively closed molten steel channel, effectively limit molten steel table
The gas in face flows, and to which the pernicious gas limited in air is spread into molten steel, greatly reduces molten steel adsorption of nitrogen hydrogen etc.
Pernicious gas, and in the case that cross-ventilation is smaller, only the air in protection sleeve pipe 100 can't produce steel quality
It is raw to influence.And the flowing of molten steel promotes alloying element being uniformly distributed in molten steel, and reduce alloy as far as possible
Element is combined to form nitride or carboritride with the N element in molten steel, and then improves the quality of molten steel after alloying.
At the same time, in tapping process since molten steel exposes in air, molten steel makes because of heat radiation, heat loss through convection for steel-making
Molten steel generates larger temperature drop during tapping, by taking electric furnace as an example, molten steel temperature drop is even up to during electric furnace steel tapping
50-80℃.The design limitation of protection sleeve pipe 100 air conducts heat in the convection current of molten steel surface in the present embodiment, reduces molten steel
It is dropped in the temperature of protection sleeve pipe 100.Molten steel by tapping hole 411 after being flowed out, due to the reduction of molten steel pressure itself so that molten steel
It can be spread when flowing in ladle tank 330, that is, the diameter for flowing to molten steel when in ladle tank 330 is more than steel at tapping hole 411
The internal diameter of the diameter of stream, cannula inlet port end 110 can also keep molten steel flowing to simultaneously less than the internal diameter at cannula exit end 120
Gap still is kept with 100 inner wall of protection sleeve pipe when bottom, to improve the service life of protection sleeve pipe 100, and forms tool
There is the gap insulating layer of good heat preservation effect, therefore there is significant progress.
Embodiment 2
The substance of the present embodiment with embodiment 1, the difference is that：The tube wall of protection sleeve pipe 100 from outside to inside according to
Secondary setting shell 104, thermal insulation layer 102 and refractory material layer 101 (as shown in Figure 2)；The shell 104 is with higher machinery
The steel construction of intensity is made, and the thermal insulation layer 102 is made of heat-barrier material, and wherein heat-barrier material is glass fibre, asbestos, rock
Cotton or silicate or combinations of the above；The heat-barrier material of thermal insulation layer 102 can effectively limit molten steel in protection sleeve pipe 100
Heat to 100 external cooling of protection sleeve pipe, reduce the temperature loss in tapping process, and then tapping temperature can be reduced,
Save steel-making energy consumption.The refractory material layer 101 is set to the inner wall of protection sleeve pipe 100, and refractory material layer 101 has fire proofed wood
Material is made, and can effectively resist washing away and corroding for molten steel.The thermal insulation layer 102 is set to shell 104 and refractory material layer
Between 101.
Embodiment 3
The substance of the present embodiment with embodiment 2, the difference is that：It is also set up between shell 104 and thermal insulation layer 102
There is void layer 103 (as shown in Figure 2), i.e., is provided with gap between shell 104 and thermal insulation layer 102, and constitute void layer 103, it should
Void layer 103 can be vacuum condition, can also will be filled with the void layer 103 of arbitrary gas, the void layer 103 of the present embodiment
In filled with air.Void layer 103 between shell 104 and thermal insulation layer 102 changes the heat transfer condition of protection sleeve pipe 100, to
Limit molten steel in protection sleeve pipe 100 reduces the thermal loss in molten steel tapping process to external heat transfer.
Embodiment 4
The substance of the present embodiment with embodiment 1, the difference is that：The connection bottom that connecting sleeve 200 passes through bottom
Plate 220 is connected with cannula inlet port end 110, and through-hole is provided on connecting bottom board 220, and the through-hole is corresponding with cannula inlet port end 110 to be set
It sets, the accommodating chamber 210 of connecting sleeve 200 is penetrated through by above-mentioned through-hole and protection sleeve pipe 100 so that molten steel can be by tapping hole 411
It is flow in protection sleeve pipe 100 through accommodating chamber 210, and protective effect is realized to molten steel.It is provided with pockets on connecting bottom board 220
221, which is set to the circumferential edges position (as shown in Figure 3) of connecting bottom board 220.
Electric furnace is before tapping, to prevent molten steel from flowing directly to corrode supporting plate on supporting plate, usual going out on supporting plate top
Filler is filled inside 411 pipe of steel mouth, these fillers are taken out between supporting plate and molten steel on the pipeline from tapping hole 411
Go out supporting plate, opens after tapping hole 411 under molten steel gravity, filler can be squeezed splash by tapping hole 411 and gone out by molten steel, be sprayed
The filler splashed is eventually fallen into ladle tank 330, is then melted in high-temperature molten steel.But it is a large amount of due to containing in filler
Impurity, fusing into the filler of high-temperature molten steel will cause harmful element to enter in molten steel, be degrading the performance of steel, be the outer essence of follow-up stove
Refining brings pressure；Therefore, for the steelmaking process of electric furnace, the tapping protection pipe of electric furnace steel making tapping is devised, is connected
Pockets 221 are provided on bottom plate 220, which is set to the circumferential edges position of connecting bottom board 220, filler
When splash in by 411 pipeline of tapping hole goes out, spray regime is radial, and filler will be injected in the appearance of connecting bottom board 220
It receives in groove 221 so that partial filler will not fall into ladle tank 330, reduces influence of the filler to steel quality, keeps away simultaneously
Exempted from filler to the influence during alloying, improved the smelting quality of molten steel, reduce smelting cost, have significantly into
Step.
Embodiment 5
The substance of the present embodiment with embodiment 4, the difference is that：The medial surface of pockets 221 inclines for groove
The angle of inclination on inclined-plane 222, the groove slant face 222 is 45 °, and groove slant face 222 is so that in filler along radial spray
When penetrating, filler is more easy to fall into pockets 221, further reduces filler and falls into ladle, and then avoids and fill out
Material reduces smelting cost to the influence during alloying.
Embodiment 6
The substance of the present embodiment with embodiment 1, the difference is that：The top of connecting sleeve 200 is provided with assembly
Component 230, the mounting structure 230 include boot segment 231 and vertical section 232 (as shown in Figure 4), and boot segment 231 has one
The internal diameter of fixed taper, i.e. 231 top of boot segment is more than the internal diameter of 231 bottom of boot segment, and 231 top internal diameter of boot segment is larger,
So that the top of connecting sleeve 200 is easier to coordinate with tapping hole 411, after 231 top of boot segment coordinates with tapping hole 411,
Continue to move up tapping protection pipe, tapping hole 411 can be assemblied under the action of boot segment 231 in vertical section 232；Therefore boot segment
231 for guiding connecting sleeve 200 to be matched with tapping hole 411, and makes 411 location fit of tapping hole in vertical section 232.It is described
232 lower part of vertical section be provided with limiting plate 240, limiting plate 240 is provided centrally with limiting through hole 241, the limiting through hole 241
Internal diameter is between the internal diameter and outer diameter of tapping hole 411, i.e. the internal diameter of tapping hole 411<The internal diameter of limiting through hole 241<Tapping hole
411 outer diameter；So that limiting plate 240 can limit the limit that moves down of tapping hole 411, and it can guarantee normal tapping.
Tapping hole 411 is matched with the limiting through hole 241 at 240 center of limiting plate, and molten steel is flowed out by tapping hole 411, molten steel
Inflow protection sleeve pipe 100 through 240 center of limiting plate；The limiting plate 240 moves down limit for tapping hole 411, avoids assembling
During tapping hole 411 be packed into connecting sleeve 200 depth it is too deep, improve efficiency of assembling while, avoid connecting sleeve
200 with 411 damaged in collision of tapping hole.
At the same time, during molten steel is tapped, molten steel flows to protection sleeve pipe 100 by tapping hole 411, due to molten steel
There is gap, molten steel surface air body can be driven to flow between the accommodating chamber 210 in protection sleeve pipe 100 and connecting sleeve 200,
And make gas that convection current occur in molten steel surface.The limiting plate 240 is while limit to the accommodating chamber in connecting sleeve 200
210 spaces are split, and 210 space of accommodating chamber is divided into 2 independent spaces, limit gas in molten steel surface generation pair
Stream, it is suppressed that gas violent flow in protection sleeve pipe 100, and then limit the pernicious gas in air and spread into molten steel；
At the same time, the convection current for also limiting air in molten steel surface is conducted heat, and the temperature for reducing molten steel in protection sleeve pipe 100 drops, drop
Temperature drop in low tapping process.
Embodiment 7
The substance of the present embodiment with embodiment 1, the difference is that：Steel ladle cover 331 is provided on ladle tank 330,
Be provided on steel ladle cover 331 with 500 matched alloy material mouth 335 of material alloying device, be additionally provided with and tap on steel ladle cover 331
The matched molten steel introducing port 332 (as shown in Figure 6) of protection pipe.
Molten steel introducing port 332 is provided on steel ladle cover 331, molten steel introducing port 332 is matched with tapping protection pipe；The molten steel
Introducing port 332 is provided with entrance closing cover 333 (as shown in Figure 7) with matching.During tapping, entrance closing cover is first opened
333, then tapping protection pipe is inserted into ladle tank 330, realize molten steel when flowing to ladle tank 330 by tapping hole 411 whole process into
Row protection, avoids molten steel from being contacted with air in ladle tank 330, and then reduce the impurity in molten steel.And avoid tapping
In the process, molten steel radiates outward, reduces the thermal loss in tapping process.Entrance closing cover 333 is used for after tapping, is closed
Molten steel introducing port 332 is closed, to prevent molten steel from being radiated outward by molten steel introducing port 332, above-mentioned entrance closing cover 333 passes through hinge
334 are rotatablely connected with steel ladle cover 331, and entrance closing cover 333 can be axis rotation with hinge 334.
Alloy material mouth 335 is provided on steel ladle cover 331, which matches with material alloying device 500, that is, closes
The feeding tube 520 of golden feeder 500 can pass through steel ladle cover 331 by alloy material mouth 335, and be inserted into ladle tank 330.Described
Material mouth capping 336 with matching is provided in alloy material mouth 335, material mouth capping 336 is by passing through hinge 334 and steel ladle cover
331 rotation connections, material mouth capping 336 can be axis rotation with hinge 334.After alloy is added in material alloying device 500, material can be closed
Mouth capping 336 avoids air from being entered in ladle tank 330 by material mouth capping 336, and then molten steel is avoided to be adsorbed in ladle tank 330
Pernicious gas.After ladle tank 330 is capped, while argon gas can be blasted into ladle tank 330 so that in just in ladle tank 330
Pressure condition, and then air is avoided to be spread into ladle tank 330.
Embodiment 8
The substance of the present embodiment with embodiment 1, the difference is that：The material alloying device 500 is obliquely installed,
Material alloying device 500 is used to alloy material being added to the lower part of tapping protection pipe, specific to describe：Material alloying device 500 adds
Pipe material 520 extend to tapping protection pipe cannula exit end 120 lower part, when tap 30%-40% when, the present embodiment is preferred
35%, material alloying device 500 by alloy material be added to tapping protection pipe lower part, material alloying device 500 by alloy material be added to
In ladle tank 330, the molten steel of tapping protection pipe outflow can be stirred alloy material, and alloy material is fast under the action of molten steel stirs
Speed is scattered in molten steel, and the quick flowing and impact of molten steel promote alloying element being uniformly distributed in molten steel, complete steel
The alloying of water, and then improve the quality of steel alloy.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case of from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described here.In addition, background technology is intended to Development Status and meaning in order to illustrate this technology,
It is not intended to limit the application field of the present invention or the application and the present invention.
More specifically, although exemplary embodiment of the present invention has been described herein, the invention is not limited in
These embodiments, but include those skilled in the art according to the detailed description of front it can be appreciated that it is modified, omit,
Any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement.In claim
Restriction can widely be explained according to the language used in claim, and be not limited in foregoing detailed description or in reality
The example described during this application is applied, these examples should be considered as nonexcludability.For example, in the present invention, term is " preferably
Ground " not exclusively, preferably, here it means that " but be not restricted to that ".It is in office where method or process claims
In any step for enumerating can execute in any order and be not limited to the sequence proposed in claim.Therefore, of the invention
Range should only be determined by appended claims and its legal equivalents, rather than by descriptions and examples given above Lai
It determines.
Claims (10)
1. the molten steel alloyage process in a kind of protection tapping process, it is characterised in that：Electric furnace is before tapping by ladle tank (330)
It is moved to tapping hole (411) lower part, and tapping protection pipe is assemblied on tapping hole (411), guarantor of the molten steel in tapping protection pipe
Ladle tank (330) is flow to by tapping hole (411) under shield effect, then alloy material is added into the molten steel of ladle tank (330), to molten steel
Carry out alloying.
2. the molten steel alloyage process in a kind of protection tapping process according to claim 1, it is characterised in that：Specifically
Steps are as follows：
Molten steel alloying device is moved to tapping hole (411) lower part, and makes steel by 2-5min before S1, electric furnace smelting are completed
Packet tank (330) is located at tapping hole (411) lower part；
S2, electric furnace ontology (400) inclination when completing is smelted, by the tapping protection pipe of molten steel alloying device and tapping hole (411)
It matches, the supporting plate for opening tapping hole (411) starts to tap, and molten steel is under the protective effect of tapping protection pipe by tapping hole
(411) it flow to ladle tank (330)；
S3, the top that material alloying device (500) is moved to ladle tank (330), and from material alloying device (500) to ladle tank
(330) alloy material is added in molten steel, carries out molten steel alloying.
3. the molten steel alloyage process in a kind of protection tapping process according to claim 2, it is characterised in that：Described
Step S2 is as follows：Tilting equipment (430) is driven again when smelting completion, and electric furnace ontology (400) is in eccentric furnace bottom
(420) run-off the straight under the action of, molten steel is flowed by tapping hole (411) in tapping protection pipe in tapping process, protection pipe of tapping
Molten steel is protected during tapping, the internal diameter of the protection sleeve pipe (100) of the tapping protection pipe is more than tapping hole
(411) diameter has gap when molten steel flows through protection sleeve pipe (100) between the inner wall of protection sleeve pipe (100).
4. the molten steel alloyage process in a kind of protection tapping process according to claim 2, it is characterised in that：Described
Step S3 is as follows：When tap 30%-40% when, material alloying device (500) by alloy material be added to tapping protect
The lower part of pipe, alloy material are rapidly scattered in molten steel under the action of molten steel stirs, and complete the alloying of molten steel.
5. according to the molten steel alloyage process in a kind of protection tapping process of claim 1-4 any one of them, feature exists
In：The molten steel alloying device includes buggy ladle (300), tapping protection pipe and material alloying device (500), the ladle
Vehicle (300) includes protection pipe regulation and control unit (321), feeder regulation and control unit (322) and ladle tank (330)；Above-mentioned tapping is protected
Pillar is installed on protection pipe regulation and control unit (321), and protection pipe regulates and controls position of the unit (321) for regulating and controlling tapping protection pipe,
Tapping protection pipe is for protecting molten steel in tapping process；Above-mentioned material alloying device (500) is installed on feeder tune
It controls on unit (322), feeder regulates and controls position of the unit (322) for regulating and controlling material alloying device (500), material alloying device
(500) it is used to that alloy material to be added into ladle tank (330).
6. the molten steel alloyage process in a kind of protection tapping process according to claim 5, it is characterised in that：Described
Protection pipe of tapping includes protection sleeve pipe (100) and connecting sleeve (200), and the connecting sleeve (200) is used for and tapping hole
(411) it connects；The cannula inlet port end (110) of the protection sleeve pipe (100) is connected with connecting sleeve (200), and constitutes perforation
Tapping protection pipe, the internal diameter of the protection sleeve pipe (100) is more than the diameter of tapping hole (411), and molten steel flows through protection sleeve pipe
(100) there is when between the inner wall of protection sleeve pipe (100) gap.
7. the molten steel alloyage process in a kind of protection tapping process according to claim 5, it is characterised in that：Described
It is identical with feeder regulation and control unit (322) structure that protection pipe regulates and controls unit (321) comprising vertical telescoping mechanism (301), level
Telescoping mechanism (302) and rotating mechanism (303), the vertical telescoping mechanism (301) are fixedly installed on buggy ladle (300),
Horizontal extension mechanism (302) is rotatablely installed by rotating mechanism (303) in the top of vertical telescoping mechanism (301).
8. the molten steel alloyage process in a kind of protection tapping process according to claim 6, it is characterised in that：Described
Protection sleeve pipe (100) is conical pipe, and the internal diameter at the cannula inlet port end (110) of protection sleeve pipe (100) is less than cannula exit end
(120) internal diameter, and the internal diameter of cannula inlet port end (110) is more than the diameter of tapping hole (411).
9. the molten steel alloyage process in a kind of protection tapping process according to claim 6, it is characterised in that：Described
The tube wall of protection sleeve pipe (100) sets gradually shell (104), thermal insulation layer (102) and refractory material layer (101) from outside to inside.
10. the molten steel alloyage process in a kind of protection tapping process according to claim 6, it is characterised in that：It is described
Connecting sleeve (200) at the top of be provided with mounting structure (230), the mounting structure (230) include boot segment (231) and
Vertical section (232), boot segment (231) make tapping hole for guiding connecting sleeve (200) to be matched with tapping hole (411)
(411) location fit is in vertical section (232).
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| CN201710111338.8A CN108285947B (en) | 2017-02-28 | 2017-02-28 | A kind of molten steel alloyage process in protection tapping process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115090867A (en) * | 2022-07-18 | 2022-09-23 | 江苏盐电铸业有限公司 | Casting pouring system and pouring method thereof |
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|---|---|
| CN108285947B (en) | 2019-09-27 |
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