CN104801684B - Lifting type system for inhibiting fluctuating of liquid level of crystallizer at high drawing speed - Google Patents
Lifting type system for inhibiting fluctuating of liquid level of crystallizer at high drawing speed Download PDFInfo
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- CN104801684B CN104801684B CN201510240031.9A CN201510240031A CN104801684B CN 104801684 B CN104801684 B CN 104801684B CN 201510240031 A CN201510240031 A CN 201510240031A CN 104801684 B CN104801684 B CN 104801684B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
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Abstract
The invention discloses a lifting type system for inhibiting fluctuating of liquid level of a crystallizer at high drawing speed, and belongs to the technical field of optimizing of crystallizer technology. The lifting type system comprises a main unit and a lifting unit, wherein the side surface of a flow collector is provided with a flow collecting opening which is communicated with the flow collector, and a flow blocking plate is arranged in the flow collector; a flow separator is in an oblong shape, a plurality of through holes are formed in the upper part of the flow separator and are distributed from the center to the two sides, and the sizes of the through holes are successively increased; a flow outlet is connected with the flow separator through a hanging column, and the flow separator is connected with the lifting unit through a large hanging column; wheels are arranged at the two ends of a lifting vehicle, and are matched with vertical steel rails; a pulley is arranged at the top part of each steel rail, one end of a steel cable bypasses each pulley and is connected with the lifting vehicle, and the other end of each steel cable is connected with a rotary shaft of a lifting motor. The system has the advantages that the fluctuating of the liquid level of the crystallizer can be inhibited at the high drawing speed, the flow which is sprayed out of a side hole of an immersing type water opening is maximally collected at the flow collecting opening, and the nonuniformity of the amount of discharged liquid steel on the water opening of the flow separator is effectively inhibited.
Description
Technical field
The present invention relates to crystallizer process optimization technical field, more particularly, it relates to press down under a kind of high pulling rate of lifting
The system of liquid level fluctuation of crystallizer processed.
Background technology
In the production process of continuous casting process, molten steel enters crystallizer from tundish by submersed nozzle.When throwing speed
When degree is higher, in crystallizer, have larger level fluctuation, this is because under same crystallizer width, pulling rate increases, flow stock
Flow out the speed of mouth of a river side opening and flow increases, stream stock increases to the impulsive force of crystallizer leptoprosopy, lead to the upper backflow flowing stock strong
Degree increases, and upper recirculating zone is increased with the shearing force of the top of the slag, causes the different degrees of fluctuation of whole mold liquid level, wherein with close
The part fluctuation of meniscus is particularly evident, and high pulling rate can cause the increase of lower circulating flow strength, so that a large amount of field trashes is entered with liquor stream
Enter molten steel deep, more difficult floating.
The harm that mould liquid level larger fluctuation is brought mainly has：(1) liquid fluctuating can increase the slag of crystallizer molten steel
Risk, inclusion in casting blank content overproof will have a strong impact on the quality of strand and final products；(2) liquid fluctuating can affect to tie
The three-decker of brilliant device covering slag, destroys lubricity and the balance heat transfer of crystallizer protecting residue；(3) liquid level fluctuation of crystallizer is serious
When, or even the lobe of strand can be caused to leak, be mingled with the pernicious production accident such as leakage.
How on the premise of ensureing yield and product quality, to suppress liquid level fluctuation of crystallizer, be that puzzlement Ferrous Metallurgy produces
Enterprise's difficult problem for many years.By patent retrieval, existing related technical scheme is open at present, such as China Patent No.：
200710047480.7, the applying date：On October 26th, 2007, invention and created name is：Controlled liquid level flow field and the continuous casting of fluctuation
Mould assembly, this application case suppression liquid level fluctuation of crystallizer device by submersed nozzle, smoothing roll, guide roller, transfer to
Roller, consumption metallic plate, covering slag, strand, water-cooled crystallizer and dummy bar composition, this device is in traditional continuous casting crystallining
Smoothing roll, guide roller are newly added on device equipment, transfers to roller and consumption metallic plate, by conveying consumption metal into crystallizer
Controlling liquid level fluctuation of crystallizer, wherein consumption metallic plate composition is identical with the composition of continuous casting billet in crystallizer for plate.For this
Application case, applicant has done multiple simulation and has calculated discovery：(1) after this consumption metallic plate is admitted in crystallizer, due to this
Consumption metallic plate consumption of calorie is larger, breaks the thermal balance in crystallizer, reduces molten steel in mold temperature, reduces steel flow
Dynamic property, is made slugging be floated with Slag inclusion and is difficult to.(2) after this consumption metallic plate is admitted to molten steel, its fusing is not
Top-down, the part of the jet directly contact being sprayed with submersed nozzle side opening can be melted at first, forms a hole, so
Can be difficult to calculate the feeding speed of consumption metallic plate, in order to ensure " balance between revenue and expenditure " of molten steel and strand in crystallizer, strand
Pulling rate also can be difficult to determine.So, the technical scheme that this application case provides is it is difficult to be applied in actual production process.
Though the control of liquid level fluctuation of crystallizer being made in prior art with many experiments and studying, finally it is difficult to extensive
Popularization, traces it to its cause and has two：(1) control the installation cost of liquid level fluctuation of crystallizer too high, and continuous casting scene is under high temperature, gear
Slag device is not easy to safeguard；(2) control the effect of liquid fluctuating undesirable, or even new harm can be caused, lose more than gain.How
Realize the effect of good suppression liquid level fluctuation of crystallizer in casting process, and inclusion content in melting steel can be removed further,
To realize the smelting target of high purity steel, it is a puzzlement Ferrous Metallurgy manufacturing enterprise difficult problem for many years.
Applicant Anhui University of Technology submitted the innovation and creation application for the problems referred to above on 2 27th, 2015,
Its specifying information is as follows, application number：2015100899233, invention and created name：Suppress mold liquid level ripple under a kind of high pulling rate
Dynamic device, applicant：Anhui University of Technology, the applying date：On 2 27th, 2015.But, under this high pulling rate, suppress crystallizer liquid
Also there is following technological deficiency in the device of face fluctuation：(1), find in actual production process, submersed nozzle side opening ejects
Its spray angle of jet coming, jet velocity often vary, and therefore converging inlet tends not to timely and effectively assemble by soaking
Enter the jet that formula mouth of a river side opening ejects, most of jet is introduced into suppressing the device of liquid level fluctuation of crystallizer, thus causing
The effect of suppression liquid level fluctuation of crystallizer is poor；(2), find in actual production process, the diverter mouth of a river stream on diverter
The molten steel amount distribution going out is very uneven, thus causing the impact that covering slag accepts uneven, is unfavorable for suppressing mold liquid level
Fluctuation.
In sum, the device of liquid level fluctuation of crystallizer is suppressed can to play well in the production process how guaranteeing reality
Using effect, be the technical problem of urgent need to resolve in prior art.
Content of the invention
1. invent technical problem to be solved
It is an object of the invention to overcome suppressing the device of liquid level fluctuation of crystallizer cannot realize in actual production process
The effect of good suppression liquid fluctuating in crystallizer, there is provided suppression liquid level fluctuation of crystallizer under a kind of high pulling rate of lifting
System, using technical scheme, can effectively suppress the liquid fluctuating of crystallizer under high pulling rate, and then reduction slag,
The odds such as the lobe leakage of strand, remove effectively with the field trash flowing back into molten steel deep under crystallizer, and can
Converging inlet is made to assemble the jet being ejected by submersed nozzle side opening to greatest extent, effectively suppress to discharge steel on the diverter mouth of a river
The uneven phenomenon of liquid measure.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is：
Suppress the system of liquid level fluctuation of crystallizer, including main unit and lifting under a kind of high pulling rate of lifting of the present invention
Unit；Wherein：
Described main unit includes conflux mechanism, diversion mechanism and bindiny mechanism, described conflux mechanism include water trap,
Flow-stopping plate, go out head piece and converging inlet, described water trap is a cylinder, is provided with cylindrical cavity, conflux inside this cylinder
Device side is provided with coupled logical converging inlet, and converging inlet upper edge tilts upward；It is provided with baffle inside described water trap
Plate, this flow-stopping plate is fixed on the junction of water trap and converging inlet upper edge, and flow-stopping plate tilts downwards；On described water trap
Portion is provided with circular port, and this circular port is connected with the connecting tube above it；Described goes out the rectangle that head piece is a center band through hole
Block, described connecting tube is connected with the head piece that goes out above it；
Described diversion mechanism includes diverter, and described diverter is a cuboid, and diverter top is provided with some logical
Hole, diverter bottom is provided with rectangular recess；Some through holes on described diverter top are symmetrical along diverter both sides, and from
The center of diverter increases successively to diverter both sides, the size of through hole；
Described bindiny mechanism includes davit and big davit, and described four angles going out head piece upper surface are hung with 4 respectively
One end of post is connected, and the other end of above-mentioned 4 davits is connected with diverter lower surface；On described big davit one end and diverter
The central point on surface is connected, and the big davit other end is connected with lifting unit；Described main unit has two, and each main unit is equal
It is connected with lifting unit by big davit thereon；
Above-mentioned conflux mechanism, diversion mechanism and bindiny mechanism are made up of mild steel sections, described mild steel sections
Surfaces externally and internally is equipped with coat；
Described lifting unit includes lift truck, wheel, rail, wirerope, lifting motor and pulley, and described lift truck two ends set
There is wheel, described wheel is matched with the rail being vertically arranged；Described rail top is provided with pulley, and described wirerope one end bypasses cunning
Wheel is connected with lift truck, and the described wirerope other end is connected with the rotating shaft of lifting motor.
As a further improvement on the present invention, described lift truck is a rectangular slab, and the center of this rectangular slab is provided with rectangle
Through hole；Be connected in described rectangular through-hole two connecting rods being parallel to each other, described connecting rod length direction and lift truck length side
To perpendicular, each connecting rod is all fixed with a big davit；Two wheels of the every one end of described lift truck are co-axially mounted；Institute
State lift truck two ends and be all fixed with becket, described lift truck is connected with wirerope by becket.
As a further improvement on the present invention, described converging inlet upper edge positive pitch=submersed nozzle side opening is downward
Inclination angle × 2.
As a further improvement on the present invention, described flow-stopping plate is angled downward as 16 °.
As a further improvement on the present invention, described diverter top is provided with 6 through holes.
3. beneficial effect
The technical scheme being provided using the present invention, compared with prior art, has following remarkable result：
(1) suppress the system of liquid level fluctuation of crystallizer under a kind of high pulling rate of lifting of the present invention, by main unit and liter
Fall unit together constitutes the system of the suppression liquid level fluctuation of crystallizer of ad hoc structure, is found by hydraulic model trial：Casting speed
Bigger, the jet intensity of submersed nozzle side opening is bigger, and the intensity that jet diagonally downward is ejected into crystallizer wall is bigger, institute's shape
The liquid flowing strength of up and down two recirculating zones becoming is bigger, and due to the shearing force of upper backflow, mold liquid level occurs
Larger fluctuation, with flow back into molten steel deep field trash be not easy to float.The suppression liquid level fluctuation of crystallizer of the present invention
This jet can be introduced in water trap before jet hit crystallizer wall diagonally downward by system by converging inlet, in conflux
In device, momentum of impinging jet reduces and is simultaneously disperseed, simultaneously because in water trap flow-stopping plate effect, jet is difficult to again by converging inlet stream
Go out, by going out head piece outflow after being introduced into the momentum of impinging jet reduction of water trap, meet diverter and be simultaneously evenly dispersed, finally by diverter
The mouth of a river is flowed out and is contacted with covering slag, and due to the stop of diverter side plate, liquor stream will not circumvent diverter and directly impact crystallization
Wall, liquid level fluctuation of crystallizer has obtained good suppression, and most of field trash is also directed directly towards covering slag by the system, is protecting
Liquid level fluctuation of crystallizer is effectively inhibited, it is to avoid the danger that mould liquid level larger fluctuation is brought while card inclusion removal
Evil, improves the flow field in crystallizer.
(2) suppress the system of liquid level fluctuation of crystallizer under a kind of high pulling rate of lifting of the present invention, wherein main unit is led to
Excessive davit is connected with lifting unit, so that main unit is fixed in crystallizer, neatly adjusts master by lifting unit
Body unit enters the depth of molten steel, so that the converging inlet in main unit is assembled to greatest extent and is sprayed by submersed nozzle side opening
Jet out, in the present invention, submersed nozzle both sides are equipped with side opening, the jet that submersed nozzle both sides side opening ejects
Assembled to greatest extent by the converging inlet in two main unit respectively, effectively inhibit the fluctuation of mold liquid level；In the present invention
Lift truck stationary body unit in the way of welding suspension, four on lift truck wheel is matched with the rail being vertically arranged,
So that lift truck is moved up and down along rail, be so provided with two effects, one is to make lift truck smooth up and down to move, and two is to prevent
Lift truck occurs to move forward and backward, if because lift truck occurs to move forward and backward, then main unit also can move forward and backward, this
Sample be may result in main unit and collided with crystallizer width wall, causes the damage of device.
(3) applicant finds through a large amount of field experimentatioies, if the diverter mouth of a river size on diverter is the same, has certain
Kinetic energy come to flow impact on diverter, near diverter center the diverter mouth of a river flow out molten steel amount be more than other diverters
The molten steel amount that the mouth of a river is flowed out, causes the impact that covering slag accepts uneven, is unfavorable for suppressing liquid level fluctuation of crystallizer；The present invention's
Suppress the system of liquid level fluctuation of crystallizer, wherein diverter top is provided with some through holes (herein under a kind of high pulling rate of lifting
Through hole is the diverter mouth of a river), above-mentioned some through holes are symmetrical along diverter both sides, and from the center of diverter to shunting
Device both sides, the size of through hole increases successively, and it is uneven that above-mentioned setting restrained effectively release molten steel amount on the diverter mouth of a river
Phenomenon, is conducive to suppressing liquid level fluctuation of crystallizer it is achieved that the good using effect of the system.
(4) system of liquid level fluctuation of crystallizer, the wherein group of coat are suppressed under a kind of high pulling rate of lifting of the present invention
It is divided into 85%CaO, 1.8%MgO, 3.2%MnO, 0.5%Al2O3, 1.5%SiO2, 0.05%FeO, 0.15%Fe2O3, 4%
ZrO2, 3.8%Cr2O3, this coat not only has a high temperature resistant, erosion resisting, also has the effect of absorption inclusion content in melting steel；
Using the present invention suppression liquid level fluctuation of crystallizer system when, its coat with steel contacts during, can be effective
The field trashes such as the aluminium sesquioxide in ground removal molten steel, manganous silicate and calcium aluminate, realize going further to inclusion content in melting steel
Remove, to reach the smelting target of high purity steel.
(5) system of liquid level fluctuation of crystallizer, reasonable in design, system are suppressed under a kind of high pulling rate of lifting of the present invention
Make low cost, be easy to promote the use of.
Brief description
Fig. 1 is the main structure diagram of main unit in the present invention；
Fig. 2 is the left view structural representation of main unit in the present invention；
Fig. 3 is the overlooking the structure diagram of main unit in the present invention；
Fig. 4 illustrates for suppressing the front view structure of the system of liquid level fluctuation of crystallizer under a kind of high pulling rate of lifting of the present invention
Figure；
Fig. 5 is the overlooking the structure diagram of lifting unit in the present invention.
In figure label declaration：1st, water trap；2nd, flow-stopping plate；3rd, go out head piece；4th, davit；5th, the diverter mouth of a river；6th, big davit；
7th, diverter；8th, diverter side plate；9th, converging inlet；10th, submersed nozzle；11st, covering slag；12nd, crystallizer wall；13rd, jet；
14th, lift truck；15th, wheel；16th, rail；17th, wirerope；18th, lifting motor；19th, pulley.
Specific embodiment
For further appreciating that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, under a kind of high pulling rate of lifting of the present embodiment, suppress mold liquid level
The system of fluctuation, including main unit and lifting unit.Wherein：Main unit includes conflux mechanism, diversion mechanism and connection machine
Structure, the jet 13 of submersed nozzle 10 side opening ejection can first be assembled by conflux mechanism, reduce its momentum, being then tapped off mechanism will move
The liquor stream that amount reduces uniformly discharges, and liquid level fluctuation of crystallizer is suppressed well.Bindiny mechanism is respectively used to connect conflux machine
Structure and diversion mechanism, diversion mechanism and lifting unit.
Conflux mechanism includes water trap 1, flow-stopping plate 2, goes out head piece 3 and converging inlet 9, and water trap 1 is a cylinder, this cylinder
Internal portion is provided with cylindrical cavity, and water trap 1 side is provided with coupled logical converging inlet 9, inclines upward in converging inlet 9 upper edge
Tiltedly；It is provided with flow-stopping plate 2, this flow-stopping plate 2 is fixed on the junction of water trap 1 and converging inlet 9 upper edge, baffle inside water trap 1
Plate 2 tilts downwards；Water trap 1 top is provided with circular port, and this circular port is connected with the connecting tube above it；Going out head piece 3 is
The rectangular block of one center band manhole, connecting tube is connected with the head piece 3 that goes out above it.
Diversion mechanism includes diverter 7, and diverter 7 is a cuboid, and diverter 7 top is provided with 6 through holes, diverter 7
The through hole on top is referred to as the diverter mouth of a river 5.Above-mentioned 6 through holes are symmetrical along diverter 7 both sides, and from diverter 7
The heart increases successively to diverter 7 both sides, the size of through hole.It should be noted that applicant finds through a large amount of field experimentatioies, if
The diverter mouth of a river 5 size on diverter 7 is the same, have certain kinetic energy flowing impact on diverter 7, near diverter 7
The molten steel amount that the diverter mouth of a river 5 at center is flowed out is more than the molten steel amount that other diverter mouths of a river 5 are flowed out, and causes covering slag 11 to accept
Impact uneven.Applicant is dimensioned to less the closer to diverter 7 center by the diverter mouth of a river 5, effectively suppresses
The uneven phenomenon of release molten steel amount on the diverter mouth of a river 5.Diverter 7 bottom is provided with rectangular recess.
Bindiny mechanism includes davit 4 and big davit 6, goes out four angles one end with 4 davits 4 respectively of head piece 3 upper surface
It is connected, the other end of above-mentioned 4 davits 4 is connected with diverter 7 lower surface；Big davit 6 one end and the center of diverter 7 upper surface
Point is connected, and big davit 6 other end is connected with lifting unit.Main unit has two, and each main unit is big all by thereon
Davit 6 is connected with lifting unit.
Lifting unit includes lift truck 14, wheel 15, rail 16, wirerope 17, lifting motor 18 and pulley 19, lift truck 14
Two ends are provided with wheel 15, and wheel 15 is matched with the rail 16 being vertically arranged；Rail 16 top is provided with pulley 19, wirerope 17 one end
Bypass pulley 19 to be connected with lift truck 14, wirerope 17 other end is connected with the rotating shaft of lifting motor 18.
Further, as shown in Figure 4 and Figure 5, lift truck 14 is a rectangular slab, and the center of this rectangular slab is provided with rectangle
Through hole；Be connected in rectangular through-hole two connecting rods being parallel to each other, and connecting rod length direction is hung down with lift truck 14 length direction phase
Directly, each connecting rod is all fixed with a big davit 6；Two wheels 15 of the every one end of lift truck 14 are co-axially mounted；Lift truck
14 two ends are all fixed with becket, and lift truck 14 is connected with wirerope 17 by becket.
In the present embodiment, two main unit are all connected with two on lift truck 14 respectively by big davit 6 thereon
Bar is welded and fixed, and lift truck 14 slides up and down along the rail 16 that two ends are vertically arranged, all connected wirerope 17 in lift truck 14 two ends,
The wirerope 17 at lift truck 14 two ends connects the rotating shaft of same lifting motor 18, under the synchronization of lifting motor 18 drives, lifting
The wirerope 17 at car 14 two ends jointly pulls lift truck 14 and slides up and down, thus the moving up and down of realization body unit.
In the present embodiment, stationary body unit (i.e. hanging greatly in main unit in the way of welding and hanging be responsible for by lift truck 14
Post 6 welding is suspended on lift truck 14)；Four wheels 15 on lift truck 14 are matched with the rail 16 being vertically arranged, and make liter
Fall car 14 moves up and down along rail 16, is so provided with two effects, and one is to make lift truck smooth movement about 14, and two is anti-
Only lift truck 14 generation is movable (before and after herein, refers to the normal direction of crystallizer width wall；Crystallizer width wall is in the accompanying drawings
Not shown, crystallizer wall 12 is the narrow wall of crystallizer, and the wide wall of crystallizer and crystallizer wall 12 collectively form four walls of crystallizer, its
The wide wall of middle crystallizer is perpendicular with crystallizer wall 12), if because lift truck 14 occur movable, then main unit also can
Occur movable, so may result in main unit and collide with crystallizer width wall, cause the damage of device.Lift truck
The rectangular through-hole at 14 centers is used for passing through of submersed nozzle 10.
In the present embodiment, water trap 1 is cylinder, is provided with cylindrical cavity inside this cylinder, and flow-stopping plate 2 is solid slab
Shape structure, goes out the rectangular block that head piece 3 is a center band manhole, davit 4 and big davit 6 are cylindrical structure, and diverter 7 is
Rectangular structure, diverter 7 top is provided with 6 through holes, and above-mentioned 6 through holes are symmetrical along diverter 7 both sides, and from shunting
The center of device 7 increases successively to diverter 7 both sides, the size of through hole.Diverter 7 bottom is provided with rectangular recess.For cross section
Amass the plate slab crystallizer for 400mm × 115mm, in the present embodiment, the concrete dimensional requirement of main unit is as follows：Water trap 1 interior
Footpath is 50mm, and external diameter is 60mm, interior a height of 40mm, outer a height of 60mm；The size of flow-stopping plate 2 is 44mm × 40mm × 5mm, baffle
Plate 2 tilts downwards, and it is 16 ° with horizontal line angle；The size going out head piece 3 is 77mm × 65mm × 10mm, goes out circle on head piece 3
The radius of shape through hole is 20mm；Davit 4 height is 14.38mm, and section radius are 5mm；Big davit 6 section radius are 10mm, long
Spend for 1000mm；The size of diverter 7 is 300mm × 75mm × 25mm, and 6 through holes on diverter 7 top are referred to as diverter water
Mouthfuls 5, the diverter mouth of a river 5 be shaped as combining (as shown in Figure 3) of rectangle and two semicircles, diverter 7 lower rectangular groove
Size be 290mm × 65mm × 5mm；Converging inlet 9 upper edge positive pitch=submersed nozzle 10 side opening is angled downward × 2,
In the present embodiment, submersed nozzle 10 side opening is angled downward as 25 °, so converging inlet 9 upper edge positive pitch takes 50 °；This reality
Apply casting speed in example and take 1.8m/min, in continuous casting steel billet produces, belong to higher pulling rate.In the present embodiment, main unit is by low
Carbon steel part is constituted, surfaces externally and internally all brushing coats of mild steel sections.This coat is by the component of following mass percent
Composition：85%CaO, 1.8%MgO, 3.2%MnO, 0.5%Al2O3, 1.5%SiO2, 0.05%FeO, 0.15%Fe2O3, 4%
ZrO2, 3.8%Cr2O3.
Suppress the system of liquid level fluctuation of crystallizer, its preparation method is as follows under the high pulling rate of the lifting of the present embodiment：
Step one, the preparation of mild steel parts：
Structure according to main unit in the present embodiment prepares mild steel steel plate, is polished in its surface coarse, according to above-mentioned
Each part dimension welded, make water trap 1, flow-stopping plate 2, go out head piece 3, diverter 7 and converging inlet 9；Prepare four again
Length is 14.38mm, and section radius are the mild steel cylinder of 5mm and polish in its surface coarse, make davit 4, by four
Davit 4 is welded on out on head piece 3, and the long back gauge that the bottom surface distance of center circle of wherein every davit 4 goes out head piece 3 upper surface is 5mm, away from
Minor face is 7.31mm；Preparing section radius again is 10mm, and length is that the mild steel cylinder of 1000mm makes big davit 6,
Polished on central point that is coarse and being welded on diverter 7 upper surface in its surface；Metal frame (the mechanics structure of this main unit
Frame) complete.
Step 2, coating layer material prepare：
Weigh each component according to the component requirements of coat, this coating layer material is grouped by the group of following mass percent
Become：85%CaO, 1.8%MgO, 3.2%MnO, 0.5%Al2O3, 1.5%SiO2, 0.05%FeO, 0.15%Fe2O3, 4%
ZrO2, 3.8%Cr2O3, said components mix homogeneously adds water and is allowed to stir into pureed；
Step 3, coating operation：
The coating layer material of step 2 is equably applied in the outer surface of mild steel sections, coat thickness is 6mm, by
It is difficult to add coat in mild steel sections inner surface, so its coat thickness is not strict with, but must assure that can not
There is mild steel exposed outside, coat thickness reaches 6mm～9mm；
Step 4, maintenance are simultaneously dried
By the main unit of step 3 natural curing at normal temperatures 15～20 hours, the main unit after natural curing is put
Enter in oven：Baking temperature, at 80～100 DEG C, toasts 3 hours；Baking temperature rises to 150～200 DEG C, toasts 1.5 hours；
Baking temperature rises to 200～250 DEG C, toasts 1 hour；Baking temperature rises to 300～350 DEG C, toasts 1 hour；Baking is cooled to
200～250 DEG C, toast 1 hour；It is cooled to 80～100 DEG C again, toasts 1 hour, toasting natural cooling of coming out of the stove after terminating is
Can；
Step 5, install lifting unit additional
Lifting unit is assembled according to the structure of lifting unit in the present embodiment；According to step one to step 4, make respectively
Main unit as standby two, by two main unit all by big davit 6 thereon respectively with lift truck 14 on two
Connecting rod is welded and fixed, and completes the preparation of whole system.
Using the coat of said method preparation can be stable the surfaces externally and internally being attached to mild steel sections so that main body
Unit performance is stable.Found by hydraulic model trial：When pulling rate is higher, submersed nozzle 10 side opening can eject penetrating of higher speed
Stream 13, and then promote liquid level fluctuation of crystallizer to aggravate, in the present embodiment, main unit is connected with lifting unit by big davit 6,
So that main unit is fixed in crystallizer, the depth that main unit enters molten steel is adjusted by lifting unit, makes main body list
Converging inlet 9 in unit can assemble the jet 13 (as shown in Figure 4) being ejected by submersed nozzle 10 side opening to greatest extent, this
In embodiment, submersed nozzle 10 both sides are equipped with side opening, and the jet 13 that submersed nozzle 10 both sides side opening ejects is respectively
Assembled to greatest extent by the converging inlet 9 in two main unit；Cylindrical cavity in water trap 1 for the jet 13 converges, and it moves
Amount reduces, and is moved upwardly together with molten steel by being mixed in water trap 1 of bringing into of jet 13, by going out head piece 3 and with less
Momentum impulse current shunt 7, final liquor stream is flowed out and contacted with covering slag 11 by 6 diverter mouth of a river 5 on diverter 7 top.?
During this, mold liquid level is changed into slow fluctuation by big ups and downs, and fluctuating margin is less, does not result in slag phenomenon
Occur, meanwhile, liquid level keeps less fluctuation to promote the uniform melt of covering slag 11.Gear in water trap 1 in the present embodiment
Stream plate 2 prevents liquor stream in water trap 1 to be flowed out by converging inlet 9, and diverter side plate 8 is located at the four of diverter 7 lower rectangular groove
In week (surrounding of diverter 7 lower rectangular groove is referred to as diverter side plate 8), diverter side plate 8 can effectively stop liquid flow impact
To the diffusion of crystallizer wall 12 during diverter 7.Suppress the system of liquid level fluctuation of crystallizer under the high pulling rate of the lifting of the present embodiment
Because the design of its structure is so that this system can optimize the flow field in crystallizer under high pulling rate, the ripple of suppression mold liquid level
Dynamic, effectively stop the field trash that submersed nozzle 10 side opening jet 13 is brought into from entering molten steel deep in a large number, in suppression crystallization simultaneously
Effectively remove in molten steel while device liquid fluctuating and be mingled with, and then improve slab quality.Additionally, what deserves to be explained is, the present invention
In big davit 6 be not that size for its concrete size limits, and refer to mainly lift the davit of diverter 7, the present invention
In big davit 6 be referred to as：Main davit.In the same manner, the davit 4 in the present invention refers to connect the company of head piece 3 and diverter 7
Fitting, the davit 4 in the present invention is referred to as：Connecting post.
Below schematically the present invention and embodiments thereof are described, this description does not have restricted, institute in accompanying drawing
Show is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area
Art personnel enlightened by it, in the case of without departing from the invention objective, designs and this technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (3)
1. under a kind of high pulling rate of lifting suppress liquid level fluctuation of crystallizer system it is characterised in that：Including main unit and liter
Fall unit；Wherein：
Described main unit includes conflux mechanism, diversion mechanism and bindiny mechanism, described conflux mechanism include water trap (1),
Flow-stopping plate (2), go out head piece (3) and converging inlet (9), described water trap (1) is a cylinder, is provided with cylinder inside this cylinder
Body cavity, water trap (1) side is provided with coupled logical converging inlet (9), and converging inlet (9) upper edge tilts upward；Described
Water trap (1) inside be provided with flow-stopping plate (2), this flow-stopping plate (2) is fixed on the company of water trap (1) and converging inlet (9) upper edge
Meet place, flow-stopping plate (2) tilts downwards；Described water trap (1) top is provided with circular port, this circular port with its above connection
Pipe is connected；Described go out the rectangular block that head piece (3) is a center band through hole, described connecting tube with its above go out head piece
(3) it is connected；
Described diversion mechanism includes diverter (7), and described diverter (7) is a cuboid, and diverter (7) is if top is provided with
Dry through hole, diverter (7) bottom is provided with rectangular recess；Some through holes on described diverter (7) top are along diverter (7) both sides
Symmetrical, and from the center of diverter (7) to diverter (7) both sides, the size of through hole increases successively；
Described bindiny mechanism includes davit (4) and big davit (6), and described four angles going out head piece (3) upper surface are respectively with 4
One end of root davit (4) is connected, and the other end of above-mentioned 4 davits (4) is connected with diverter (7) lower surface；Described big davit
(6) one end is connected with the central point of diverter (7) upper surface, and big davit (6) other end is connected with lifting unit；Described main body list
Unit has two, and each main unit is all connected with lifting unit by big davit (6) thereon；
Above-mentioned conflux mechanism, diversion mechanism and bindiny mechanism are made up of mild steel sections, described mild steel sections inside and outside
Surface is equipped with coat；
Described lifting unit includes lift truck (14), wheel (15), rail (16), wirerope (17), lifting motor (18) and pulley
(19), described lift truck (14) two ends are provided with wheel (15), and described wheel (15) is matched with the rail (16) being vertically arranged；Institute
State rail (16) top and be provided with pulley (19), described wirerope (17) one end is bypassed pulley (19) and is connected with lift truck (14), described
Wirerope (17) other end is connected with the rotating shaft of lifting motor (18)；
Described lift truck (14) is a rectangular slab, and the center of this rectangular slab is provided with rectangular through-hole；It is connected in described rectangular through-hole
Two connecting rods being parallel to each other, described connecting rod length direction is perpendicular with lift truck (14) length direction, each connecting rod
On be all fixed with a big davit (6)；Two wheels (15) of the every one end of described lift truck (14) are co-axially mounted；Described lift truck
(14) two ends are all fixed with becket, and described lift truck (14) is connected with wirerope (17) by becket；
Described converging inlet (9) upper edge positive pitch=submersed nozzle (10) side opening is angled downward × 2.
2. suppress the system of liquid level fluctuation of crystallizer under a kind of high pulling rate of lifting according to claim 1, its feature exists
In：Described flow-stopping plate (2) is angled downward as 16 °.
3. under a kind of high pulling rate of lifting according to claim 1 and 2, suppress the system of liquid level fluctuation of crystallizer, its feature
It is：Described diverter (7) top is provided with 6 through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240031.9A CN104801684B (en) | 2015-05-12 | 2015-05-12 | Lifting type system for inhibiting fluctuating of liquid level of crystallizer at high drawing speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240031.9A CN104801684B (en) | 2015-05-12 | 2015-05-12 | Lifting type system for inhibiting fluctuating of liquid level of crystallizer at high drawing speed |
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| Publication Number | Publication Date |
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| CN104801684A CN104801684A (en) | 2015-07-29 |
| CN104801684B true CN104801684B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510240031.9A Expired - Fee Related CN104801684B (en) | 2015-05-12 | 2015-05-12 | Lifting type system for inhibiting fluctuating of liquid level of crystallizer at high drawing speed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116493563B (en) * | 2023-06-28 | 2023-09-12 | 江苏永钢集团有限公司 | Crystallizer liquid level control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10128513A (en) * | 1996-10-30 | 1998-05-19 | Sumitomo Metal Ind Ltd | Division mold for continuous casting |
| CN101219464A (en) * | 2007-10-26 | 2008-07-16 | 上海大学 | Continuous casting crystallizer capable of controlling liquid level flow field and wave motion |
| CN102151811B (en) * | 2011-03-09 | 2013-06-26 | 钢铁研究总院 | Method for capturing continuous casting inclusion and novel submersed nozzle |
| CN203292439U (en) * | 2012-10-16 | 2013-11-20 | 中冶南方工程技术有限公司 | Multi-stage shunting type continuous casting immersive nozzle |
| CN204603248U (en) * | 2015-05-12 | 2015-09-02 | 安徽工业大学 | The system of liquid level fluctuation of crystallizer is suppressed under a kind of high pulling rate of lifting |
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Effective date of registration: 20211203 Address after: 201800 room j2695, 1f, No. 185, Moyu Road, Anting Town, Jiading District, Shanghai Patentee after: Shanghai Baoqu Automation System Engineering Co.,Ltd. Address before: 243002 Anhui province Ma'anshan Huashan Lake District Road No. 59 Patentee before: ANHUI University OF TECHNOLOGY |
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