CN105081246A - Continuous feeding device and method for molten covering slag for continuous casting crystallizer - Google Patents
Continuous feeding device and method for molten covering slag for continuous casting crystallizer Download PDFInfo
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- CN105081246A CN105081246A CN201510545760.5A CN201510545760A CN105081246A CN 105081246 A CN105081246 A CN 105081246A CN 201510545760 A CN201510545760 A CN 201510545760A CN 105081246 A CN105081246 A CN 105081246A
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Abstract
The invention relates to a continuous feeding device and method for molten covering slag for a continuous casting crystallizer. The continuous feeding device comprises a solid slag container, a slag melting crucible, a molten slag installation damper, a molten slag flow control damper and a molten slag injection channel, wherein a lower solid slag discharging pipeline is arranged on the lower portion of the solid slag container; a slag inlet is formed in the upper portion of the slag melting crucible, and a slag discharging channel is formed in the lower portion of the slag melting crucible; a slag melting electrode is arranged at the center inside the slag melting crucible, a bottom electrode is arranged at the bottom of the slag melting crucible, and a crucible heat preservation layer is arranged on the outside of the slag melting crucible; the molten slag flow control damper is vertically inserted in the part, on the outer side of the molten slag installation damper, of the slag discharging channel, and the molten slag flow control damper moves up and down so that a double-damper hole type flow control mode can be formed; one end of the molten slag injection channel is connected with the outlet end of the slag discharging channel in the lower portion of the slag melting crucible, and the other end of the molten slag injection channel is connected with the continuous casting crystallizer. The continuous feeding device integrates the processes of melting the covering slag, controlling the flow and injecting the covering slag into the crystallizer; in the overall process of the continuous casting technology, the molten covering slag is injected to the surface of molten steel in the crystallizer, and the continuous feeding device can be used for various continuous casting machines.
Description
Technical field
The present invention relates to continuous casting technology, particularly a kind of continuous feeding device of continuous cast mold molten mold flux and method.
Background technology
In continuous casting of molten steel process, in conticaster crystallizer, molten steel top adds solid-state covering slag usually, utilizes the heat of molten steel to be melted by solid-state covering slag.Covering slag plays two key effects: one is that molten steel and gas separate by covering slag after melting, prevents molten steel oxidized; Two is conduct heat between crystallization control device and molten steel, plays lubrication, make casting process smooth between strand after solidification and crystallizer.Also having one is play insulation effect to molten steel top, prevents molten steel surface temperature from declining fast.
The covering slag that current continuous casting uses is powdery or granular, and molten steel surface forms 3 layers in a crystallizer: with steel contacts be melting slag blanket, melting slag blanket is transition zone, is topmost solid slag.Solid slag forms one deck slag film through the flowing between crystallizer and the base shell of molten steel solidification formation of molten steel heat melts, plays lubrication.In this region, solid slag stands molten steel heat melts, stands again the low temperature in crystallizer face and cools.Large 1.5 ~ 2 times of the specific heat ratio molten steel of solid slag, has again the larger latent heat of fusion in addition, and therefore solid slag fusion process needs to absorb more heat.In casting process, liquid steel temperature fluctuates, and the fluctuation of covering slag composition, all will have influence on solid slag fusion process.
Two hang-ups are run into: one is to have fast burn-off rate, prevents slag and slag inclusion when solid protective slag (powdery, granular) is joined crystallizer; Two is the pre-arcing characterisiticses that will have, and produces " bridge formation " fault when avoiding solid slag to melt.These two difficult problems are all the key reasons causing continuous casting billet dreg defect.In order to improve covering slag meltdown property, usual way is that covering slag is made into pre-melted slag, and shatter after being about to configure the powdery slag fusing of composition, make hollow ball-shape slag particle, the price of covering slag can raise again.
In the various defects (Surface inclusion, slag inclusion inside, chink, transverse fissure and lobe, internal segregation, oscillation mark etc.) that continuous casting billet occurs, dreg defect accounts for about 46% of overall defect.
In order to solve an above difficult problem, Kawasaki, Japan house journal 05-023802 (1993), 05-146855 (1993) propose to add a cover heat preserving method on crystallizer top.Melt helpful smoothly to solid slag.Kawasaki, Japan house journal 05-007907 (1994), 06-007908 (1994) and 06-079419 (1994) gives the method for powdery pre-melted slag supply.POSCO Co., Ltd. of Korea S patent 101479061 (2007) proposes method liquid slag being supplied crystallizer, and tests on pilot scale conticaster.
The emphasis of this patent protection is that liquid slag flow-control adopts stopper up-down mode to realize, and along arranging coated radiation shield lid on crystallizer, prevents molten steel radiation heat leakage and temperature declines.This patent is difficult to accurately control with stopper control slag flow at the scene.One is stopper in use melting loss itself, and shape is difficult to ensure.Two be liquid slag outlet temperature be difficult to ensure, when slag stream repeatedly open and close time, be easy to slagging scorification.This patent proposes to use platinum or platinum rhodium noble metal to make stopper head and liquid slag outlet for this reason, and manufacturing cost is a large problem.
Summary of the invention
The object of the present invention is to provide a kind of continuous feeding device and method of continuous cast mold molten mold flux, by covering slag fusing, flow control, be injected into the covering slag continuous melting that crystallizer is integrated, the device supplied continuously.In continuous casting process overall process, molten mold flux is injected into the molten steel surface in crystallizer.Can use on various conticaster.
For achieving the above object, technical scheme of the present invention is:
A continuous feeding device for continuous cast mold molten mold flux, it comprises, solid slag container, and a solid slag slag pipeline is established in its underpart; Change slag crucible, the slag inlet that its top establishes the solid slag slag pipeline for described solid slag lower vessel portion to plant, change slag crucible bottom and establish slag releasing channel; Change central authorities' establishing slag electrode in slag crucible, hearth electrode is established in bottom, changes slag crucible peripheral hardware crucible heat insulation layer; Change slag electrode, hearth electrode are electrically connected a transformer and power supply respectively; Liquid slag installs flashboard, is vertically inserted in describedization slag crucible slag releasing channel, and liquid slag is installed on flashboard and offered the through hole identical with slag releasing channel internal diameter; Liquid slag flow-control flashboard, vertically be inserted in the slag releasing channel outside described liquid slag installation flashboard, to install flashboard parallel with liquid slag, the through hole identical with slag releasing channel internal diameter offered by liquid slag flow-control flashboard, and, liquid slag flow-control flashboard, for moving up and down setting, forms double disc pass flow control version; Liquid slag injection channel, its one end connects the describedization slag crucible bottom slag releasing channel port of export, and the other end is connected to continuous cast mold; Liquid slag injection channel peripheral hardware heater.
Further, the two ends of described liquid slag injection channel are a sheathed heat resisting steel conducting ring respectively, the liquid slag injection channel outer wall between two heat resisting steel conducting rings from inside to outside successively ring establish insulated heat earthenware and madial wall to comprise the vacuum metal pipe of refractory fiber cloth.
Further, a sheathed insulated heat earthenware outside described liquid slag injection channel, the outer winding load coil of insulated heat earthenware, load coil outer cladding heat insulation layer.
Further, a sheathed insulated heat earthenware outside described liquid slag injection channel, insulated heat earthenware outer ring arranges some electrically heated rods, electrically heated rod outer cladding heat insulation layer.
Preferably, described electrically heated rod adopts Elema or Si-Mo rod.
Again, solid slag flow-control conveying device established by described solid slag container inner bottom part corresponding solid slag slag pipeline, and this conveying device is screw rod transmission form.
Preferably, the outer wall of the describedization slag crucible bottom slag releasing channel port of export establishes adpting flange, one end, described liquid slag injection channel Flange joint with it.
In addition, describedization slag crucible also establishes one end to be connected to flue gas exhaust pipeline on dust collection cover and corresponding gas cooler, smoke duster and smoke exhaust fan.
Preferably, described heater adopts Frequency Induction Heating or graphite-pipe electrified regulation.
Further, be embedded with Compressed Gas jet pipe in describedization slag crucible, its nozzle exit is arranged in the described slag releasing channel port of export.
Preferably, outside described being wrapped in of Compressed Gas jet pipe slag crucible, by the pre-hot compressed gas of heat outside change slag crucible.
Further, packaged type control of dust heat shield is provided with above describedization slag crucible.
The supply method of the continuous feeding device of continuous cast mold molten mold flux of the present invention, in casting process, adds solid-state covering slag in solid-state slag ladle, and solid-state covering slag fusion process is carried out in change slag crucible; After molten mold flux amount reaches setting value, moved up and down by electrode, control the temperature of molten mold flux and remain on a constant setting value; Require slag to be injected in continuous cast mold according to continuous casting process; Molten mold flux addition is determined according to casting speed, and when casting molten steel per ton, molten mold flux addition is 0.4 ~ 1.7kg/t molten steel, and molten mold flux temperature remains between 1200 ~ 1300 DEG C.
Use conductionization slag crucible and after changing slag electrifying electrodes, solid-state covering slag is molten into molten state covering slag.When change slag starts; fritter striking agent is placed in change slag crucible bottom; making slag electrode produces electric arc with change slag crucible bottom; solid-state covering slag around fusing starting the arc agent; after forming little melting slag bath, change slag electrode, liquid slag and change slag crucible bottom electrode and form current loop, electric current is when liquid slag; other solid slag is melted, until all solid slag all melt by the resistance heating of liquid slag own.
Melt solid-state covering slag process to be through the liquid covering slag self-resistance heating of having melted and to carry out.Solid-state covering slag burn-off rate moves up and down control size of current by change slag electrode and realizes.Molten mold flux temperature after same fusing is also move up and down control loop electric current to control by changing slag electrode, accurately can control the temperature of liquid slag, to meet the needs of continuous casting process to liquid slag temperature by which.
Change in slag process, adopt fusing limit, limit to add solid-state covering slag method.The solid-state covering slag continuous-flow system that solid-state covering slag is arranged by this device provides, and its amount supplying solid-state covering slag is according to the supply of solid slag fusing degree.
After in change slag crucible, the solid-state protection quantity of slag of setting has melted, by changing the temperature of liquid slag in slag electrode control system size of current controlization slag crucible, to meet the demand of continuous casting process.
Flange joint is passed through with change slag crucible in molten mold flux injection channel; molten mold flux continuous through injection channel (or interruption) is injected into molten steel top in continuous cast mold; by molten steel and gas-insulated, between crystallizer and solidified shell, form liquid film lubricate.Injection channel adopts electrically heated rod (Elema, Si-Mo rod etc.) heating, and heat resistance fiber insulation is used in outside.Also Frequency Induction Heating can be used, or graphite-pipe electrified regulation.
In order to ensure that each molten mold flux injection process is carried out smoothly; in injection channel with between crucible adpting flange and flow-control flashboard, Compressed Gas blow device is set; each molten mold flux injects and terminates; at once purge injection channel with Compressed Gas, preventing residual slag from solidifying affects the injection of molten mold flux next time.Outside being wrapped in of compressed gas tube slag crucible, by the pre-hot compressed gas of heat outside change slag crucible.
Adopt the present invention, in continuous casting process overall process, operating personnel need not add solid-state covering slag directly to crystallizer, are joined by solid-state covering slag in the solid-state slag ladle of the present invention's configuration.Solid-state covering slag fusion process is carried out in change slag crucible.After molten mold flux amount reaches setting value, moved up and down by electrode, control the temperature of molten mold flux and remain on a constant setting value.Require slag to be injected in crystallizer according to continuous casting process.Molten mold flux addition is determined according to casting speed, and when casting molten steel per ton, molten mold flux addition is 0.4 ~ 1.7kg/t molten steel.Molten mold flux temperature remains between 1200 ~ 1300 DEG C.
The backflow of the present invention's employing slag electrode, slag and conductive crucible composition electricity; utilize slag self-resistance to generate heat and solid-state covering slag is molten into molten state covering slag; the temperature controlling to control molten mold flux through the electric current of slag is moved up and down with electrode; the melting quantity of slag reaches setting value and after liquid slag temperature meets continuous casting requirement, according to continuous casting process in crystallizer continuously (or interval) inject molten mold flux.When continuous casting process enters normal condition, device injects molten mold flux in crystallizer, while carry solid-state covering slag in crucible, by the exothermic melting solid-state covering slag added of slag self-resistance in crucible.System arrives the solid-state covering slag speed of the fusing stable state identical with injecting molten mold flux speed, realizes continuing to provide molten mold flux in crystallizer.Guarantee that continuous casting overall process is carried out under molten mold flux covers.
Beneficial effect of the present invention:
The present invention can realize continuous casting process whole process and directly supply molten mold flux operation, without the need to adding solid-state covering slag in crystallizer.Because not needing molten steel heat melts covering slag, then the molten steel overheat entering crystallizer can reduce 10 ~ 20 DEG C, has large energy-saving effect.Continuous casting process overall process no longer adds solid-state covering slag in crystallizer, reduces continuous casting billet surface and internal flaw, significantly reduces casting billet surface oscillation mark and scratch, improve cc billet surface quality.Continuous casting whole process direct-furnish molten mold flux, improves conticaster pulling rate, namely makes high-speed continuous casting become possibility.
Accompanying drawing explanation
Fig. 1 is the structural representation of liquid slag continuous feeding device embodiment of the present invention.
Fig. 2 is the structural representation of molten mold flux flow-control of the present invention.
Fig. 3, Fig. 4 are the schematic diagram (the A-A sectional view of Fig. 2) that in liquid slag continuous feeding device of the present invention, liquid slag installation flashboard coordinates with liquid slag flow-control flashboard.
Fig. 5 is the structural representation of liquid slag injection channel embodiment one in continuous feeding device of the present invention.
Fig. 6 is the structural representation of liquid slag injection channel embodiment two in continuous feeding device of the present invention.
Fig. 7 is the structural representation of liquid slag injection channel embodiment three in continuous feeding device of the present invention.
Detailed description of the invention
See Fig. 1 ~ Fig. 7, the continuous feeding device of a kind of continuous cast mold molten mold flux of the present invention, it comprises, solid slag container 1, and a solid slag slag pipeline 2 is established in its underpart; Change slag crucible 3, the slag inlet that its top establishes the solid slag slag pipeline 2 for described solid slag container 1 bottom to plant, change slag crucible 3 bottom and establish slag releasing channel 31; Change central authorities' establishing slag electrode 4 in slag crucible 3, hearth electrode 5 is established in bottom, changes slag crucible 3 peripheral hardware crucible heat insulation layer 6; Change slag electrode 4, hearth electrode 5 are electrically connected a transformer and power supply respectively; Liquid slag installs flashboard 7, is vertically inserted in describedization slag crucible slag releasing channel 31, and liquid slag is installed on flashboard 7 and offered the through hole 71 identical with slag releasing channel 31 internal diameter; Liquid slag flow-control flashboard 8, vertically be inserted in the slag releasing channel 31 outside described liquid slag installation flashboard 7, to install flashboard 7 parallel with liquid slag, the through hole 81 identical with slag releasing channel internal diameter offered by liquid slag flow-control flashboard 8, and, liquid slag flow-control flashboard 8, for moving up and down setting, forms double disc pass flow control version; Liquid slag injection channel 9, its one end connects describedization slag crucible 3 bottom slag releasing channel 31 port of export, and the other end is connected to continuous cast mold 100; Liquid slag injection channel peripheral hardware heater.
See Fig. 5, the two ends of liquid slag injection channel 9 of the present invention liquid slag injection channel outer wall respectively between sheathed heat resisting steel conducting ring 10,10 ', a two heat resisting steel conducting ring from inside to outside successively ring establish insulated heat earthenware 11 and madial wall to comprise the vacuum metal pipe 13 of refractory fiber cloth 12.
See Fig. 6, the outer sheathed insulated heat earthenware 11 in liquid slag injection channel 9 of the present invention, the outer winding load coil 14 of insulated heat earthenware 11, load coil 14 outer cladding heat insulation layer 15.
See Fig. 7, the outer sheathed insulated heat earthenware 11 in described liquid slag injection channel 9, insulated heat earthenware 11 outer ring arranges some electrically heated rods 16, the outer 16 coated heat insulation layer 15 of electrically heated rod.
Preferably, described electrically heated rod 16 adopts Elema or Si-Mo rod.
Again, solid slag flow-control conveying device 17 established by described solid slag container 1 inner bottom part corresponding solid slag slag pipeline 2, and this conveying device 17 is screw rod transmission form.
Preferably, the outer wall of describedization slag crucible 3 bottom slag releasing channel 31 port of export establishes adpting flange 32, one end, described liquid slag injection channel 9 Flange joint with it.
In addition, describedization slag crucible 3 also establishes one end to be connected to flue gas exhaust pipeline 18 on dust collection cover and corresponding gas cooler 19, smoke duster 20 and smoke exhaust fan 21.
Preferably, described heater adopts Frequency Induction Heating or graphite-pipe electrified regulation.
Further, be embedded with Compressed Gas jet pipe 33 in describedization slag crucible 3, its nozzle exit is arranged in described slag releasing channel 31 port of export.
Preferably, outside described being wrapped in of Compressed Gas jet pipe 33 slag crucible 3, by the pre-hot compressed gas of heat outside change slag crucible 3.
Further, packaged type control of dust heat shield 34 is provided with above describedization slag crucible 3.
The supply method of the continuous feeding device of continuous cast mold molten mold flux of the present invention, in casting process, adds solid-state covering slag in solid-state slag ladle, and solid-state covering slag fusion process is carried out in change slag crucible; After molten mold flux amount reaches setting value, moved up and down by electrode, control the temperature of molten mold flux and remain on a constant setting value; Require slag to be injected in continuous cast mold according to continuous casting process; Molten mold flux addition is determined according to casting speed, and when casting molten steel per ton, molten mold flux addition is 0.4 ~ 1.7kg/t molten steel, and molten mold flux temperature remains between 1200 ~ 1300 DEG C.
When change slag starts; a fritter striking agent (striking agent diameter 20 ~ 30mm) is placed in change slag crucible bottom; a small amount of solid-state covering slag is placed around striking agent; electricity connected by transformer; Control of Voltage is at 30 ~ 50V; near declineization slag electrode to striking agent; play arcing slag; after forming a little liquid slag slag bath; electrode and liquid slag and change the conducting of slag crucible; liquid slag self-resistance other solid slag exothermic melting, fusing limit, limit by the solid slag in solid slag container by solid slag flow-control conveying device and being transported to of solid slag slag passage slag crucible.After the melting quantity of slag melted reaches setting value, change slag electrode moves up and down adjustment electric current and makes molten mold flux temperature meet continuous casting process needs.Changing smoke exhaust fan when slag starts to start, will the flue gas of slag generation being changed through changing slag crucible dust collection cover, gas cooler, smoke duster discharge.
Liquid slag injection channel is by the Flange joint before adpting flange and liquid slag flow-control flashboard, and other end, injection channel is placed on crystallizer top.Start power transformer, through heat resisting steel conducting ring to heating graphite pipe (or load coil or Elema) energising, heating and melting slag injection channel.Until temperature >=800 DEG C, liquid slag injection channel, and be incubated.Heating graphite pipe (or load coil or Elema) outer setting has insulated heat earthenware, vacuum metal pipe (having refractory fiber cloth in pipe), or injection channel heat insulation layer, ensure temperature≤60 DEG C of outside, liquid slag injection channel.
According to continuous casting process demand, start liquid slag flow-control flashboard (it is normally open that liquid slag installs flashboard), liquid slag is injected into above molten steel in mold through liquid slag injection channel.When conticaster starts, once entering crystallizer top liquid slag layer thickness is 20 ~ 30mm.After thickness of slag layer reaches setting value, close liquid slag flow-control flashboard, start Compressed Gas to purge: the compressed gas access of Compressed Gas enters into Compressed Gas jet pipe, purges (purge time 2 ~ 10s) liquid slag injection channel and liquid slag flow-control flashboard place.
Cover crystallizer insulation cover.Molten steel is injected into continuous cast mold through tundish immersed nozzle.The crystallizer top melting slag blanket above molten steel in mold is observed by crystallizer insulation cover peep hole.
After conticaster enters normal operating, according to continuous casting process requirement, open or close liquid slag flow-control flashboard, the liquid slag flow that control enters in continuous cast mold and total amount.Solid slag flow-control conveying device in solid slag container not cracked ends solid slag slag passage supplements solid-state continuous casting covering slag in change slag crucible, sets up a stable sustainable supply liquid slag covering slag process system.
Conticaster involved in the present invention comprises slab caster, billet caster, pipe blank conticaster and bar conticaster.Steel grade relates to the casting process of various carbon steel, stainless steel, special steel.The present invention is also suitable for the casting process of non-ferrous metal.
Claims (12)
1. a continuous feeding device for continuous cast mold molten mold flux, is characterized in that: comprise,
Solid slag container, a solid slag slag pipeline is established in its underpart;
Change slag crucible, the slag inlet that its top establishes the solid slag slag pipeline for described solid slag lower vessel portion to plant, change slag crucible bottom and establish slag releasing channel; Change central authorities' establishing slag electrode in slag crucible, hearth electrode is established in bottom, changes slag crucible peripheral hardware crucible heat insulation layer; Change slag electrode, hearth electrode are electrically connected a transformer and power supply respectively;
Liquid slag installs flashboard, is vertically inserted in describedization slag crucible slag releasing channel, and liquid slag is installed on flashboard and offered the through hole identical with slag releasing channel internal diameter;
Liquid slag flow-control flashboard, vertically be inserted in the slag releasing channel outside described liquid slag installation flashboard, to install flashboard parallel with liquid slag, the through hole identical with slag releasing channel internal diameter offered by liquid slag flow-control flashboard, and, liquid slag flow-control flashboard, for moving up and down setting, forms double disc pass flow control version;
Liquid slag injection channel, its one end connects the describedization slag crucible bottom slag releasing channel port of export, and the other end is connected to continuous cast mold; Liquid slag injection channel peripheral hardware heater.
2. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 1; it is characterized in that; the two ends of described liquid slag injection channel are a sheathed heat resisting steel conducting ring respectively, the liquid slag injection channel outer wall between two heat resisting steel conducting rings from inside to outside successively ring establish insulated heat earthenware and madial wall to comprise the vacuum metal pipe of refractory fiber cloth.
3. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 1; it is characterized in that; a sheathed insulated heat earthenware outside described liquid slag injection channel, the outer winding load coil of insulated heat earthenware, load coil outer cladding heat insulation layer.
4. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 1; it is characterized in that; a sheathed insulated heat earthenware outside described liquid slag injection channel, insulated heat earthenware outer ring arranges some electrically heated rods, electrically heated rod outer cladding heat insulation layer.
5. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 4, is characterized in that, described electrically heated rod adopts Elema or Si-Mo rod.
6. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 1, is characterized in that, solid slag flow-control conveying device established by described solid slag container inner bottom part corresponding solid slag slag pipeline, and this conveying device is screw rod transmission form.
7. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 1, it is characterized in that, be embedded with Compressed Gas jet pipe in describedization slag crucible, its nozzle exit is arranged in the described slag releasing channel port of export.
8. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 7, is characterized in that, outside described being wrapped in of Compressed Gas jet pipe slag crucible, by the pre-hot compressed gas of heat outside change slag crucible.
9. the continuous feeding device of the continuous cast mold molten mold flux as described in claim 1 or 7, is characterized in that, the outer wall of the describedization slag crucible bottom slag releasing channel port of export establishes adpting flange, one end, described liquid slag injection channel Flange joint with it.
10. the continuous feeding device of continuous cast mold molten mold flux as claimed in claim 1, is characterized in that, be provided with packaged type control of dust heat shield above describedization slag crucible.
The continuous feeding device of 11. continuous cast mold molten mold fluxes as claimed in claim 10; it is characterized in that, describedization slag crucible is also established one end be connected to flue gas exhaust pipeline on control of dust heat shield and corresponding gas cooler, smoke duster and smoke exhaust fan.
The supply method of the continuous feeding device of 12. 1 kinds of continuous cast mold molten mold fluxes as claimed in claim 1, is characterized in that, in casting process, is added by solid-state covering slag in solid-state slag ladle, and solid-state covering slag fusion process is carried out in change slag crucible; After molten mold flux amount reaches setting value, move up and down by changing slag electrode, the temperature controlling molten mold flux remains on a constant setting value; Require slag to be injected in continuous cast mold according to continuous casting process; Molten mold flux addition is determined according to casting speed, and when casting molten steel per ton, molten mold flux addition is 0.4 ~ 1.7kg/t molten steel, and molten mold flux temperature remains between 1200 ~ 1300 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107144129A (en) * | 2017-05-16 | 2017-09-08 | 深圳微纳增材技术有限公司 | Vacuum melting furnace and its method of smelting |
| CN115069992A (en) * | 2021-03-16 | 2022-09-20 | 宝山钢铁股份有限公司 | Continuous casting production method based on solid-state covering slag preheating |
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