CN206486558U - A kind of electric furnace for protecting tapping - Google Patents
A kind of electric furnace for protecting tapping Download PDFInfo
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- CN206486558U CN206486558U CN201720183509.3U CN201720183509U CN206486558U CN 206486558 U CN206486558 U CN 206486558U CN 201720183509 U CN201720183509 U CN 201720183509U CN 206486558 U CN206486558 U CN 206486558U
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- tapping
- molten steel
- electric furnace
- protection
- pipe
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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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Abstract
The utility model discloses a kind of electric furnace for protecting tapping, belong to Ferrous Metallurgy steelmaking technical field.Electric furnace of the present utility model includes electric furnace body and tapping protection pipe; tapping hole is provided with electric furnace body; tapping protection pipe is installed on tapping hole; the cannula inlet port end of protection sleeve pipe is connected with connection member; and the tapping protection pipe of insertion is constituted, the internal diameter of the protection sleeve pipe for protection pipe of tapping is more than the diameter of tapping hole；Specific tapping method is that molten steel flow to protection sleeve pipe by tapping hole through connection member, and tapping protection pipe is protected during tapping to molten steel, has gap between the inwall of protection sleeve pipe when molten steel flows through protection sleeve pipe.The utility model sets up relative closed molten steel channel; molten steel is flowed into tapping protection pipe by tapping hole; the gas flowing of molten steel surface is limited, adsorbance of the molten steel to pernicious gases such as nitrogen hydrogen is reduced, the molten steel temperature drop in tapping process is reduced while improving steel quality.
Description
Technical field
The utility model is related to Ferrous Metallurgy steelmaking technical field, more specifically to a kind of electricity for protecting tapping
Stove.
Background technology
Electric arc furnaces (electric arc furnace) is the high melt ore and metal produced using electrode arc
Electric furnace, therefore also known as electric furnace.In electric furnace gas discharge formation electric arc when energy concentrate very much, arc area temperature 3000 DEG C with
On.Electric furnace has greater flexibility during smelting than other converters, and it is miscellaneous that it can effectively remove desulfuration, phosphorus etc.
Matter；And the furnace temperature of electric arc furnaces is easily controlled during smelting, suitable for smelting superior alloy steel.
After molten steel is tapped through electric furnace smelting external refining and continuous casting process to the control of oxygen in steel, nitrogen, hydrogen and temperature very
Strictly.But, helpless to protecting just about for molten steel in tapping process, molten steel directly connects with air during electric furnace steel tapping
Touch, so as to cause the pernicious gases such as substantial amounts of nitrogen hydrogen to enter molten steel, be degrading the performance of steel, be follow-up external refining and continuous casting belt
Carry out pressure, and considerably increase production cost, reduce product quality.
Nitrogen is the harmful element in general steel grade, and in tapping process, exposed molten steel is directly contacted with air, so as to increase
Nitrogen content in molten steel, typically increases 10-20ppm.Because containing certain humidity in air, molten steel hydrogenation, hydrogen will also result in
White point is easily produced in steel, steel is produced hydrogen induced cracking；Reduce product quality.It is badly in need of the tapping work for existing electric furnace
Skill, develops the electric furnace protected in tapping process to molten steel, so as to being protected in molten steel tapping process, it is to avoid steel
Objectionable impurities of the water in absorption air during tapping.
Influence to temperature is very big, and this process probably continues 4-6 minutes, in tapping process, and molten steel is because of heat radiation, right
Flow heat dissipation, deoxidation alloying, ladle liner heat absorption etc. cause liquid steel temperature to reduce.Therefore, using alloy heating, ladle in production
Temperature drop in baking and Optimized Operation etc., reduction tapping process.But, to the heat loss through radiation produced between molten steel and air and convection current
Any measure is not taken in radiating, causes molten steel radiating serious, so as to cause molten steel temperature drop to be difficult to effective control.
Find, in casting process, molten steel is protected using protection pipe, such as through retrieval：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：It is a kind of to prevent the method (patent application of molten steel nitrogen pick-up in converter tapping process
Number：201010588760.0, the applying date：2010-12-15), take before converter tapping and in tapping process, during control Argon
Between and argon flow amount, be divided to two sections or argon gas be uninterruptedly blown into ladle, until tapping terminate.So that in ladle
The argon gas discharge that air is blown into, prevents tapping from, to the molten steel and air contact in ladle, the molten steel in ladle is in all the time
Argon gas guard mode, the nitrogen pick-up for both having prevented molten steel from being caused with air contact, while making easily to adsorb in bubble surface in molten steel
[N] can be discharged and be removed with the floating of Argon Bubble.Although this method can prevent molten steel nitrogen pick-up to a certain extent,
It is but to be difficult in tapping process protect molten steel.
Utility model content
1. the utility model technical problem to be solved
The purpose of this utility model be to overcome in the prior art electric furnace be difficult to protect molten steel in tapping process,
A kind of electric furnace for protecting tapping is provided；, can be in tapping process to molten steel by installing tapping protection pipe on tapping hole
Protected, reduce adsorbance of the molten steel to pernicious gases such as nitrogen hydrogen；It is possible to further reduce molten steel heat loss, reduction
Make steel energy consumption.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the utility model is provided is：
A kind of electric furnace for protecting tapping of the present utility model, including electric furnace body and tapping protection pipe, described electric furnace
Be provided with body on tapping hole, described tapping hole and tapping protection pipe be installed, the tapping protection pipe include protection sleeve pipe and
Connection member, described connection member is used to be connected with tapping hole；The cannula inlet port end of described protection sleeve pipe and connection member
It is connected, and constitutes the tapping protection pipe of insertion, molten steel flow to protection sleeve pipe, described protection sleeve pipe by tapping hole through connection member
Internal diameter be more than the diameter of tapping hole, there is gap between the inwall of protection sleeve pipe when the molten steel is flowed through protection sleeve pipe.
Preferably, electric furnace steel tapping case is provided with electric furnace body, the bottom of electric furnace steel tapping case is provided with tapping hole, described
The angle of tapping hole and vertical direction is ε, and ε is electric furnace steel tapping inclination angle, and tapping protection pipe and tapping hole are coaxial.
Preferably, the protection sleeve pipe of tapping protection pipe is conical pipe, and the internal diameter at the cannula inlet port end of protection sleeve pipe is less than
The internal diameter at cannula exit end, and the diameter of the internal diameter more than tapping hole at cannula inlet port end.
Preferably, accommodating chamber is offered in the connection member of tapping protection pipe, accommodating chamber is used to be sleeved on the outer of tapping hole
Portion.
Preferably, the tube wall of described protection sleeve pipe sets gradually shell, thermal insulation layer and refractory masses from outside to inside.
Preferably, positioning element is fixed with described tapping hole, connection member and the positioning element of protection pipe of tapping can
Dismounting connection, tapping protection pipe is installed on positioning element by connection member.
Preferably, positioning element includes positioning cylinder and assembling projection, and positioning cylinder is used for the outside for being sleeved on tapping hole；
Described assembling projection is arranged at the bottom of positioning cylinder.
Preferably, it is provided with mounting structure at the top of connection member, the component intrados of described mounting structure and positioning
Cylinder is engaged；Described mounting structure is provided with the fitting recess being engaged with assembling projection；Rotation mounting structure makes fitting recess
It is adapted to the assembling projection of positioning element, connection member is installed on positioning element.
3. beneficial effect
The technical scheme provided using the utility model, compared with existing known technology, with following remarkable result：
(1) a kind of electric furnace for protecting tapping of the present utility model, electric furnace body and tapping protection pipe, described electric furnace sheet
It is provided with body on tapping hole, described tapping hole and tapping protection pipe is installed, the internal diameter of protection sleeve pipe is more than the straight of tapping hole
Footpath, has gap, the cannula inlet port end of protection sleeve pipe and company when the molten steel is flowed through protection sleeve pipe between the inwall of protection sleeve pipe
Relay part is connected, and molten steel flow to protection sleeve pipe by tapping hole through connection member, is protected during being tapped to molten steel,
Reduce adsorbance of the molten steel to pernicious gases such as nitrogen hydrogen in air；
(2) a kind of electric furnace for protecting tapping of the present utility model, the internal diameter of the protection sleeve pipe for protection pipe of tapping is more than
The diameter of steel mouthful, has gap when the molten steel is flowed through protection sleeve pipe between the inwall of protection sleeve pipe, during tapping, molten steel
Good insulation void layer is formed with the space of protection sleeve pipe inwall, there is good heat insulation effect to molten steel, molten steel is reduced
Heat loss, and avoid molten steel to protection sleeve pipe inwall directly washing away, substantially increase service life；
(3) angle of a kind of electric furnace for protecting tapping of the present utility model, tapping hole and vertical direction is ε, and tapping is protected
The angle of pillar and vertical direction is also ε, and the holding for protection pipe of being tapped during tapping is vertical, and molten steel is flowed into out by tapping hole
After steel protection pipe, molten steel is vertical to be flowed out by tapping protection pipe, reduces molten steel and protection sleeve pipe inwall is washed away, improving makes
Use the life-span；
(4) a kind of electric furnace for protecting tapping of the present utility model, the tube wall of protection sleeve pipe sets gradually outer from outside to inside
Shell, thermal insulation layer and refractory masses, the heat-barrier material of thermal insulation layer can effectively limit the heat of molten steel in protection sleeve pipe to guarantor
Protecting pipe external cooling, reduces the temperature loss in tapping process, and then can reduce tapping temperature, saves steel-making energy consumption；
(5) a kind of electric furnace for protecting tapping of the present utility model, is provided with void layer, space between shell and thermal insulation layer
Layer changes the heat transfer condition of protection sleeve pipe, and limiting molten steel in protection sleeve pipe, to external heat transfer, reduces molten steel tapping process
In thermal loss, reduction steel-making energy consumption；
(6) pockets are provided with a kind of electric furnace for protecting tapping of the present utility model, connecting bottom board, the receiving is recessed
Groove is arranged at the circumferential edges position of connecting bottom board, and tapping hole filler is when the splash in tapping hole pipeline goes out, and tapping hole is filled out
Material will be injected in the pockets of connecting bottom board, is reduced the quality that tapping hole filler is fallen into ladle tank, can be avoided out
Influence of the steel mouthful filler to steel quality, improves the smelting quality of molten steel；
(7) mounting structure is provided with the top of a kind of electric furnace for protecting tapping of the present utility model, connection member, is assembled
Component is provided with the fitting recess being engaged with assembling projection, and rotation mounting structure fits the assembling projection of fitting recess and positioning element
Match somebody with somebody, connection member can be sleeved on to the outside of positioning cylinder, then rotating engagement, make the fitting recess of connection member convex with assembling
Block is interspersed, i.e., mounting structure is connected on the assembling projection of positioning element, so that connection member is installed on into location division
On part；
(8) a kind of electric furnace for protecting tapping of the present utility model, the bottom of the mounting structure of connection member sets limited
Position plate, limiting plate moves down limit for control assembling projection, limits gas and occurs convection current in molten steel surface, it is suppressed that gas
The violent flow in protection sleeve pipe, and then limit the pernicious gas in air and spread into molten steel, effectively reduce molten steel heat
Loss, reduces the molten steel temperature drop produced in tapping process.
Brief description of the drawings
Fig. 1 is the structural representation of tapping protection pipe of the present utility model；
Fig. 2 is the structural representation of tapping protection pipe protection sleeve pipe of the present utility model；
Fig. 3 is the structural representation of pockets of the present utility model；
Fig. 4 is the assembling structure schematic diagram of positioning element of the present utility model and connection member；
Fig. 5 assembles the structural representation of projection for tapping protection tube-connecting part of the present utility model；
Fig. 6 protects the structural representation of tube-connecting part for tapping of the present utility model；
Fig. 7 protects the cross-sectional view of tube-connecting part for tapping of the present utility model；
Fig. 8 is overall structure diagram of the present utility model；
Fig. 9 is tapping protection pipe of the present utility model and the assembling schematic diagram of tapping hole；
Figure 10 is the assembling schematic diagram of embodiment 9；
Figure 11 is inclination schematic diagram when embodiment 9 is tapped.
Label declaration in schematic diagram：
100th, protection sleeve pipe；101st, refractory masses；102nd, thermal insulation layer；103rd, void layer；104th, shell；110th, sleeve pipe enters
Mouth end；120th, cannula exit end；
200th, connection member；210th, accommodating chamber；220th, connecting bottom board；221st, pockets；222nd, groove slant face；230、
Mounting structure；231st, fitting recess；232nd, component intrados；240th, limiting plate；
300th, positioning element；310th, cylinder is positioned；320th, projection is assembled；321st, projection extrados；
400th, electric furnace body；410th, electric furnace steel tapping case；411st, tapping hole；420th, eccentric furnace bottom；430th, tilting equipment.
Embodiment
Hereafter the detailed description to exemplary embodiment of the present utility model with reference to accompanying drawing, and the one of accompanying drawing formation description
Part, shows the enforceable exemplary embodiment of the utility model as example in the figure.Although these exemplary realities
Apply example to be described in sufficient detail to enable those skilled in the art to implement the utility model, it is to be understood that it can be realized
His embodiment and can various changes can be made to the utility model in the case where not departing from spirit and scope of the present utility model.Hereafter
More detailed description to embodiment of the present utility model is not limited to required scope of the present utility model, and only
In order to be illustrated and do not limit the characteristics of to the utility model and feature description, it is of the present utility model to propose to perform
Best mode, and be sufficient so that those skilled in the art and can implement the utility model.Therefore, scope of the present utility model only by
Appended claims are limited.
Hereafter detailed description of the present utility model and example embodiment can be more fully understood with reference to accompanying drawing, wherein this reality
Identified with new element and feature by reference.
Embodiment 1
With reference to shown in Fig. 1 and Fig. 8, a kind of electric furnace for protecting tapping of the present utility model, including electric furnace body 400 and go out
Steel protection pipe, electric furnace body 400 includes electric furnace steel tapping case 410, eccentric furnace bottom 420 and tilting equipment 430, described electric furnace steel tapping
It is provided with case 410 on tapping hole 411, tapping hole 411 and tapping protection pipe (as shown in Figure 8) is installed, described tapping protection
Pipe can be that to be fixedly connected can also be detachably connected with tapping hole 411.Tilting equipment 430, electricity are driven during tapping
Furnace body 400 enters line tilt in the presence of eccentric furnace bottom 420, and drives electric furnace steel tapping case 410 to enter line tilt simultaneously so that steel
Water is flow in electric furnace steel tapping case 410 by electric furnace body 400, and is flowed out by the tapping hole 411 of electric furnace steel tapping case 410.
Protection pipe of tapping includes protection sleeve pipe 100 and connection member 200, and the internal diameter of described protection sleeve pipe 100 is more than
The diameter of steel mouthfuls 411, has gap when the molten steel is flowed through protection sleeve pipe 100 between the inwall of protection sleeve pipe 100；Connection member
200 are used to be connected with tapping hole 411, and accommodating chamber 210 is offered in connection member 200, and the accommodating chamber 210 is used to be sleeved on out
The outside of steel mouthful 411.Moreover, described accommodating chamber 210 is cylindrical cavity, the internal diameter of cylindrical cavity is more than cannula inlet port end
110 internal diameter.
The cannula inlet port end 110 of the protection sleeve pipe 100 of the present embodiment is connected with connection member 200, and constitutes going out for insertion
Steel protection pipe, when connection member 200 is sleeved on into 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.Open after tapping hole 411, molten steel is made in gravity
Under, molten steel flow to protection sleeve pipe 100 by tapping hole 411 through connection member 200, and the internal diameter of protection sleeve pipe 100 is more than tapping hole
411 diameter, has gap when the molten steel is flowed through protection sleeve pipe 100 between the inwall of protection sleeve pipe 100 so that molten steel not with guarantor
The inwall contact of protecting pipe 100, or inwall of the molten steel not exclusively with protection sleeve pipe 100 are contacted, so as to reduce molten steel to guarantor
Washing away for the inwall of protecting pipe 100, 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, thus the utility model proposes tapping process in tapping protection pipe broken existing
The technology prejudice of technology, with significant progressive.Even so, even if there is technical staff to pay close attention to the molten steel in tapping process
Protection, then in order to improve the protecting effect in tapping process, prevent molten steel and air contact, existing technical staff is often
Protection sleeve pipe 100 and tapping hole 411 are set to it is isometrical, so as to avoid the molten steel and protection sleeve pipe 100 in protection sleeve pipe 100
Space is produced between inwall, it is existing in order to obtain preferable protecting effect because there is space to make molten steel and air contact
Protection sleeve pipe 100 and tapping hole 411 are necessarily set to isometrical by the technical staff of technology；But, so design is but substantially reduced
The service life of protection sleeve pipe 100, preferable protecting effect is not reached not only, production cost is added on the contrary.This practicality is new
The creative internal diameter for proposing protection sleeve pipe 100 of type is more than the diameter of tapping hole 411, when the molten steel is flowed through protection sleeve pipe 100
There is gap between the inwall of protection sleeve pipe 100, during tapping, it is to avoid molten steel is to the straight of the inwall of protection sleeve pipe 100
Connect and wash away, so as to substantially increase service life.At the same time, the space of molten steel and the inwall of protection sleeve pipe 100 forms good
Space is incubated, it has good heat insulation effect, reduces the heat loss of molten steel.
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 diameter of the internal diameter more than tapping hole 411 at cannula inlet port end 110；The present embodiment middle sleeve
The internal diameter of arrival end 110 is the diameter of 1.5 times of tapping hole 411；The internal diameter at cannula exit end 120 is 3.0 times of tapping hole 411
Diameter.The internal diameter that the internal diameter at cannula inlet port end 110 is less than cannula exit end 120 effectively limit cross-ventilation, prevent sky
Gas violent flow in protection sleeve pipe 100, tapping protection pipe sets up relative closed molten steel channel, effectively limit molten steel table
The gas flowing in face, so that the pernicious gas limited in air spreads into molten steel, greatly reduce molten steel has to nitrogen hydrogen etc.
The adsorbance of evil gas, and in the case of cross-ventilation is less, only the air in protection sleeve pipe 100 can't be to molten steel
Quality produces influence.
At the same time, steel-making is in tapping process because molten steel exposes in atmosphere, and molten steel causes because of heat radiation, heat loss through convection
Molten steel produces 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 of protection sleeve pipe 100 limits convection heat transfer' heat-transfer by convection of the air in molten steel surface in the present embodiment, reduces molten steel
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
Can be spread when flowing in ladle tank, that is, flow to the diameter of molten steel when in ladle tank more than at tapping hole 411 steel stream it is straight
Footpath, the internal diameter at cannula inlet port end 110 can also keep molten steel simultaneously when flowing to bottom less than the internal diameter at cannula exit end 120
Still space is kept with the inwall of protection sleeve pipe 100, so as to improve the service life of protection sleeve pipe 100, is formed again with good
The space heat-insulation layer of heat insulation effect, therefore with significant progressive.
Embodiment 2
The substance be the same as Example 1 of the present embodiment, difference is：The tube wall of protection sleeve pipe 100 from outside to inside according to
Secondary setting shell 104, thermal insulation layer 102 and refractory masses 101 (as shown in Figure 2)；Described shell 104 is with higher machinery
The steel construction of intensity is made, and described thermal insulation layer 102 is made up 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 the external cooling of protection sleeve pipe 100, reduce the temperature loss in tapping process, and then can reduce tapping temperature,
Save steel-making energy consumption.Described refractory masses 101 are arranged at the inwall of protection sleeve pipe 100, and refractory masses 101 have fire proofed wood
Material is made, and can effectively resist washing away and corroding for molten steel.Described thermal insulation layer 102 is arranged at shell 104 and refractory masses
Between 101.
Embodiment 3
The substance be the same as Example 2 of the present embodiment, difference is：Also set up between shell 104 and thermal insulation layer 102
Have and space is provided between void layer 103 (as shown in Figure 2), i.e. shell 104 and thermal insulation layer 102, and constitute void layer 103, 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, so that
Limiting molten steel in protection sleeve pipe 100, to external heat transfer, reduces the thermal loss in molten steel tapping process.
Embodiment 4
The substance be the same as Example 1 of the present embodiment, difference is：The connection bottom that connection member 200 passes through bottom
Plate 220 is connected with cannula inlet port end 110, and through hole is provided with connecting bottom board 220, and the through hole is corresponding with cannula inlet port end 110 to be set
Put, the accommodating chamber 210 of connection member 200 passes through above-mentioned through hole and the insertion of protection sleeve pipe 100 so that molten steel can be by tapping hole 411
It is flow to through accommodating chamber 210 in protection sleeve pipe 100, and protective effect is realized to molten steel.Pockets are provided with connecting bottom board 220
221, the pockets 221 are arranged at the circumferential edges position (as shown in Figure 3) of connecting bottom board 220.
Electric furnace corrodes supporting plate, generally going out on supporting plate top before tapping to prevent molten steel from flowing directly on supporting plate
Filling filler inside 411 pipes of steel mouthful, these fillers are taken out between supporting plate and molten steel on the pipeline from tapping hole 411
Go out supporting plate, open after tapping hole 411 under molten steel Action of Gravity Field, filler can be extruded splash by tapping hole 411 and gone out by molten steel, spray
The filler splashed is eventually fallen into ladle tank, is then melted in high-temperature molten steel.But, it is substantial amounts of miscellaneous due to containing in filler
Matter, 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 follow-up external refining band
Carry out pressure；Therefore, for the steelmaking process of electric furnace, the tapping protection pipe of electric furnace steel making tapping, its connecting bottom board are devised
Pockets 221 are provided with 220, the pockets 221 are arranged at the circumferential edges position of connecting bottom board 220, filler by
Splash in the pipeline of tapping hole 411 and when going out, its spray regime is radial, and filler is recessed by the receiving for being injected in connecting bottom board 220
In groove 221 so that partial filler will not fall into ladle tank, influence of the filler to steel quality is reduced, molten steel is improved
Smelting quality, reduces smelting cost, with significant progressive.
Embodiment 5
The substance be the same as Example 4 of the present embodiment, difference is：The medial surface of pockets 221 inclines for groove
Inclined-plane 222, the angle of inclination in the groove slant face 222 is 45 °, and groove slant face 222 causes 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 improves steel
The smelting quality of liquid, reduces smelting cost.
Embodiment 6
The substance be the same as Example 1 of the present embodiment, difference is：Positioning element is fixed with tapping hole 411
300, the connection member 200 of tapping protection pipe is detachably connected with positioning element 300, and tapping protection pipe passes through connection member 200
(as shown in Figure 9) is installed on positioning element 300, and the positioning element 300 is hollow cannula-like (as shown in Figure 4 and Figure 6), fixed
Position part 300 can be sleeved on the outside of tapping hole 411, it is possible to be arranged on tapping hole by welding or other attachments
411 bottom；Described connection member 200 is detachably connected with positioning element 300, and described is detachably connected as threaded connection
Or clamping.
The specific structure of clamping of the present embodiment is：Positioning element 300 includes positioning cylinder 310 and assembling projection 320, fixed
Circle of position cylinder 310 is used for the outside for being sleeved on tapping hole 411, and positioning cylinder 310 is hollow cannula-like；Described assembling projection
320 are arranged at the bottom (as shown in Figure 6) of positioning cylinder 310.
The top of connection member 200 is provided with mounting structure 230, and mounting structure 230 is provided with through hole, the circular arc of the through hole
Face is component intrados 232, and the component intrados 232 of described mounting structure 230 is engaged with positioning cylinder 310, assembles structure
Part 230 can be sleeved on the outside of positioning cylinder 310；And mounting structure 230 is provided with the assembling being engaged with assembling projection 320
Groove 231 (as shown in Figure 4 and Figure 5)；Rotation mounting structure 230 fits the assembling projection 320 of fitting recess 231 and positioning element 300
Match somebody with somebody, connection member 200 can be sleeved on to the outside of positioning cylinder 310, then rotating engagement 200, make the dress of connection member 200
It is interspersed, i.e., mounting structure 230 is connected on the assembling projection 320 of positioning element 300 with assembling projection 320 with groove 231,
So as to which connection member 200 is installed on positioning element 300.Installation process is simple and convenient, can if protection sleeve pipe 100 is damaged
The tapping protection pipe more renewed in time.
Embodiment 7
The substance be the same as Example 1 of the present embodiment, difference is：Under the mounting structure 230 of connection member 200
Portion is provided with limiting plate 240 (as shown in Figure 7), and limiting plate 240 is provided centrally with through hole, and the internal diameter of the through hole is between tapping hole
Between 411 internal diameter and external diameter, i.e. the internal diameter of tapping hole 411<The internal diameter of through hole<The external diameter of tapping hole 411, so that spacing
Plate 240 can limit the limit that moves down of tapping hole 411, and normal tapping is can guarantee that again.
Tapping hole 411 is engaged with the through hole at the center of limiting plate 240.Molten steel is flowed out by tapping hole 411, and molten steel is through limiting plate
The inflow protection sleeve pipe 100 at 240 centers；The limiting plate 240 moves down limit for control assembling projection 320, it is to avoid in assembling
During positioning element 300 load connection member 200 depth it is too deep, while improving efficiency of assembling, it is to avoid connecting portion
Part 200 and the damaged in collision of positioning element 300.
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 between the accommodating chamber 210 in protection sleeve pipe 100 and connection member 200, molten steel surface can drive air body to flow,
And cause gas to occur convection current in molten steel surface.The limiting plate 240 is spacing while to the accommodating chamber in connection member 200
210 spaces are split, and the space of accommodating chamber 210 is divided into 2 independent spaces, limit gas in molten steel surface generation pair
Flow, 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, convection heat transfer' heat-transfer by convection of the air in molten steel surface is also limit, the temperature for reducing molten steel in protection sleeve pipe 100 drops, drop
Temperature drop in low tapping process.
Embodiment 8
The substance be the same as Example 1 of the present embodiment, difference is：The external diameter and accommodating chamber of projection extrados 321
210 internal diameter is identical (as shown in Figure 6), and projection extrados 321, which can coordinate, to be installed in inside accommodating chamber 210, it is to avoid location division
Part 300 and connection member 200 are mutually slided in the horizontal direction, so as to improve efficiency of assembling, also improve the axle of tapping hole 411
The centering degree of line and the axis of protection sleeve pipe 100.
Embodiment 9
The substance be the same as Example 6 of the present embodiment, difference is：Electric furnace steel tapping is provided with electric furnace body 400
Case 410, the bottom of electric furnace steel tapping case 410 is provided with tapping hole 411, and the angle of described tapping hole 411 and vertical direction is ε, ε
For electric furnace steel tapping inclination angle, ε is the tapping angle in normal tapping process, and ε scope is 10-15 °, and preferably 12 ° of the present embodiment goes out
Steel protection pipe is installed on after tapping hole 411, and tapping protection pipe and tapping hole 411 are coaxial, that is, the axis for protection pipe of tapping and tapping
The axis of mouth 411 is on same straight line.Therefore, tapping protection pipe is installed on after tapping hole 411, tapping protection pipe with it is vertical
The angle in direction is also ε (as shown in Figure 10).
During tapping, tilting equipment 430 is driven during tapping, electric furnace body 400 is in eccentric furnace bottom 420
Enter line tilt under effect, and drive electric furnace steel tapping case 410 to enter line tilt simultaneously so that molten steel flow to electric furnace by electric furnace body 400
In steel box 410, when the inclination angle of electric furnace body 400 reaches ε=12 °, the holding for protection pipe of now tapping is vertical (such as Figure 11 institutes
Show), molten steel is flowed into after tapping protection pipe by tapping hole 411, vertical under gravity to be flowed out by tapping protection pipe.And go out
Steel protection pipe and tapping hole 411 are coaxial, and the internal diameter of the protection sleeve pipe 100 for protection pipe of tapping is more than the diameter of tapping hole 411, molten steel
Vertical inwall of the molten steel not with protection sleeve pipe 100 is contacted when flowing through tapping protection pipe, or molten steel is not exclusively and protection sleeve pipe
100 inwall contact, washes away to the inwall of protection sleeve pipe 100 so as to reduce molten steel, improves service life.
Embodiment 10
Tapping protection pipe is installed on tapping hole by a kind of method of electric furnace protection tapping of the present embodiment, electric furnace before tapping
411 bottoms, molten steel is flowed into tapping protection pipe by tapping hole 411 during tapping, process of the tapping protection pipe in tapping
In molten steel is protected, the internal diameter of the protection sleeve pipe 100 for protection pipe of tapping is more than the diameter of tapping hole 411, and molten steel flows through guarantor
There is gap between the inwall of protection sleeve pipe 100, inwall of the molten steel not with protection sleeve pipe 100 is contacted during protecting pipe 100, or
Inwall of the molten steel not exclusively with protection sleeve pipe 100 is contacted, and reduces molten steel and the inwall of protection sleeve pipe 100 is washed away, improving makes
Use the life-span.And tapping protection pipe sets up relative closed molten steel channel, the gas flowing of molten steel surface is effectively limit, from
And limit the pernicious gas in air and spread into molten steel, adsorbance of the molten steel to pernicious gases such as nitrogen hydrogen is greatly reduced,
Improve the quality of steel.
A kind of method of electric furnace protection tapping of the present embodiment, specific step is as follows：
Before S1, electric furnace smelting are completed, tapping protection pipe is installed on the bottom of tapping hole 411, and make tapping protection pipe
It is coaxial with tapping hole 411；
Ladle is transported to tapping position when S2, smelting molten steel are completed, then drives tilting equipment 430, electric furnace body 400 is inclined
Run-off the straight in the presence of heart furnace bottom 420；
S3, when angle of inclination reaches 1/2-2/3 ε, the present embodiment be 8 °, open tapping hole 411 supporting plate start tapping,
Molten steel flows to tapping protection pipe by tapping hole 411, and accommodating chamber 210 of the molten steel through connection member 200 flows in tapping protection pipe
There is gap to protection sleeve pipe 100, and between molten steel and the inwall of protection sleeve pipe 100；Continue to drive tilting equipment 430 to make electricity
The inclination angle of furnace body 400 reaches that tapping inclination angle ε, ε are 10-15 °, and the present embodiment is 12 °, and molten steel is lasting to be flowed by tapping hole 411
Into tapping protection pipe, the inclination angle of electric furnace body 400 is kept until tapping is completed；When molten steel tapping 96%, body of heater is with 3 °/s
Return and incline to horizontal level, flow into ladle from tapping hole 411 to avoid or reduce clinker, and then realize slag free tapping.
A kind of method of electric furnace protection tapping of the present embodiment, molten steel flows into tapping by tapping hole 411 during tapping
In protection pipe, tapping protection pipe is protected during tapping to molten steel, and molten steel is to harmful gas such as nitrogen hydrogen in reduction air
The adsorbance of body；And the temperature loss in tapping process can be efficiently reduced, reduce the energy consumption of steel-making.
The supporting plate of tapping hole 411 is opened in the prior art during electric furnace steel tapping, when the inclination angle of electric furnace body 400 reaches 3-5 ° to carry out
Tapping, the present embodiment tapping inclination angle removes supporting plate when reaching 8 ° and starts tapping again, thus formed at the top of tapping hole 411 compared with
Big ferrostatic pressure, and cause just to producing larger pressure to the filler inside tapping hole 411, and then can be in tapping just
Filler inside phase tapping hole 411 can produce larger jet angle and be injected in pockets 221, reduce the filler pair of tapping hole 411
The influence of steel quality, and tapping inclination angle removes supporting plate when reaching 8 ° and starts tapping again, it is possible to reduce steel in tapping process
Erosion degree of the water to protection pipe of tapping.
The present apparatus, is installed between electric furnace and ladle by a kind of electric furnace for protecting tapping of the present utility model in production,
Closed molten steel channel is set up, molten steel and air contact have effectively been completely cut off using physical method, molten steel is greatly reduced to nitrogen hydrogen
Deng the adsorbance of pernicious gas, and molten steel heat loss is effectively reduced, reduce the molten steel temperature drop produced in tapping process.Carry
The high quality of molten steel, and by reducing tapping process temperature drop, tapping temperature can be further reduced, greatly save electric furnace life
Produce cost.Certain device can be used for other converters, for the molten steel protection in its tapping process.
The utility model is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can be
Various modifications and variations are carried out in the case of not departing from the scope of the present utility model being defined by the following claims.Detailed retouches
State should be to be considered only as with accompanying drawing it is illustrative and not restrictive, if there is any such modifications and variations, then
They are fallen within the range of the utility model described here.In addition, background technology is intended to illustrate grinding for this technology
It was found that shape and meaning, it is no intended to limit the utility model or the application and application field of the present utility model.
More specifically, although exemplary embodiment of the present utility model has been described herein, the utility model is simultaneously
These embodiments are not limited to, but are repaiied including the process that those skilled in the art can be appreciated that according to detailed description above
Change, omit, any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement.Right
It is required that in restriction can widely be explained according to the language used in claim, and be not limited in foregoing detailed description
In or the example that describes during this application is implemented, these examples are considered as nonexcludability.For example, in the utility model
In, term " preferably " not exclusively, here it means that " preferably, but be not restricted to that ".It is in office where method or
Any step enumerated in process claims can perform and be not limited to the order proposed in claim in any order.
Therefore, scope of the present utility model should be determined only by appended claims and its legal equivalents, rather than be given by above
The explanation and example that go out is determined.
Claims (8)
1. a kind of electric furnace for protecting tapping, it is characterised in that：Including electric furnace body (400) and tapping protection pipe, described electricity
It is provided with furnace body (400) on tapping hole (411), described tapping hole (411) and tapping protection pipe is installed, tapping protection
Pipe includes protection sleeve pipe (100) and connection member (200), and described connection member (200) is used to be connected with tapping hole (411)；
The cannula inlet port end (110) of described protection sleeve pipe (100) is connected with connection member (200), and constitutes the tapping protection of insertion
Pipe, molten steel flow to protection sleeve pipe (100) by tapping hole (411) through connection member (200), described protection sleeve pipe (100) it is interior
Footpath is more than the diameter of tapping hole (411), has when molten steel flows through protection sleeve pipe (100) between the inwall of protection sleeve pipe (100)
Gap.
2. a kind of electric furnace for protecting tapping according to claim 1, it is characterised in that：Set on electric furnace body (400)
Have an electric furnace steel tapping case (410), the bottom of electric furnace steel tapping case (410) is provided with tapping hole (411), described tapping hole (411) with
The angle of vertical direction is ε, and ε is electric furnace steel tapping inclination angle, and tapping protection pipe and tapping hole (411) are coaxial.
3. a kind of electric furnace for protecting tapping according to claim 1, it is characterised in that：The protection sleeve pipe for protection pipe of tapping
(100) it is conical pipe, and the internal diameter at the cannula inlet port end (110) of protection sleeve pipe (100) is less than the interior of cannula exit end (120)
Footpath, and the diameter of the internal diameter more than tapping hole (411) of cannula inlet port end (110).
4. a kind of electric furnace for protecting tapping according to claim 1, it is characterised in that：The connection member for protection pipe of tapping
(200) accommodating chamber (210) is offered in, accommodating chamber (210) is used for the outside for being sleeved on tapping hole (411).
5. a kind of electric furnace for protecting tapping according to claim 4, it is characterised in that：Described protection sleeve pipe (100)
Tube wall set gradually shell (104), thermal insulation layer (102) and refractory masses (101) from outside to inside.
6. a kind of according to claim any one of 1-5 protects the electric furnace of tapping, it is characterised in that：Described tapping hole
(411) positioning element (300) is fixed with, the connection member (200) of tapping protection pipe detachably connects with positioning element (300)
Connect, tapping protection pipe is installed on positioning element (300) by connection member (200).
7. a kind of electric furnace for protecting tapping according to claim 6, it is characterised in that：Positioning element (300) includes fixed
Circle of position cylinder (310) and assembling projection (320), positioning cylinder (310) are used for the outside for being sleeved on tapping hole (411)；Described dress
The bottom of positioning cylinder (310) is arranged at projection (320).
8. a kind of electric furnace for protecting tapping according to claim 7, it is characterised in that：The top of connection member (200)
Mounting structure (230) is provided with, the component intrados (232) of described mounting structure (230) matches with positioning cylinder (310)
Close；Described mounting structure (230) is provided with the fitting recess (231) being engaged with assembling projection (320)；Rotate mounting structure
(230) fitting recess (231) is made to be adapted to the assembling projection (320) of positioning element (300), it is fixed that connection member (200) is installed on
On position part (300).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183509.3U CN206486558U (en) | 2017-02-28 | 2017-02-28 | A kind of electric furnace for protecting tapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720183509.3U CN206486558U (en) | 2017-02-28 | 2017-02-28 | A kind of electric furnace for protecting tapping |
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| Publication Number | Publication Date |
|---|---|
| CN206486558U true CN206486558U (en) | 2017-09-12 |
Family
ID=59762798
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720183509.3U Expired - Fee Related CN206486558U (en) | 2017-02-28 | 2017-02-28 | A kind of electric furnace for protecting tapping |
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| Country | Link |
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| CN (1) | CN206486558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130399A (en) * | 2017-02-28 | 2018-06-08 | 安徽工业大学 | A kind of electric furnace for protecting tapping and the method for electric furnace protection tapping |
-
2017
- 2017-02-28 CN CN201720183509.3U patent/CN206486558U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130399A (en) * | 2017-02-28 | 2018-06-08 | 安徽工业大学 | A kind of electric furnace for protecting tapping and the method for electric furnace protection tapping |
| CN108130399B (en) * | 2017-02-28 | 2023-10-20 | 安徽工业大学 | Electric furnace capable of protecting tapping and method for protecting tapping by electric furnace |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170912 Termination date: 20180228 |