CN108500252A - A kind of tundish bottom with cover is breathed freely ring and its method that controls tundish slag - Google Patents
A kind of tundish bottom with cover is breathed freely ring and its method that controls tundish slag Download PDFInfo
- Publication number
- CN108500252A CN108500252A CN201810309398.5A CN201810309398A CN108500252A CN 108500252 A CN108500252 A CN 108500252A CN 201810309398 A CN201810309398 A CN 201810309398A CN 108500252 A CN108500252 A CN 108500252A
- Authority
- CN
- China
- Prior art keywords
- tundish
- ring
- slag
- ventilative
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
-
- 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
- B22D11/11—Treating the molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
A kind of ventilative ring of tundish bottom with cover, belongs to continuous casting of iron and steel technical field；Device is arranged around middle water containing opening brick cup；Ventilative ring is cylindrical structure；Upper surface is circular ring shape, the maximum cross-section span of the internal diameter≤2 times middle water containing opening brick cup of maximum cross-section span≤upper surface annulus of 1.5 times of middle water containing opening brick cups, ring height=tundish packet bottom height of breathing freely；Control slag method：1) the ventilative ring of tundish bottom with cover is connected to blowning installation；2) in basket pouring latter stage, when liquid steel level height in tundish: tundish height=1: when (4~5), by being passed through gas in ventilative circumferential tundish, makes to form the exposed boss area of molten steel above tundish tapping hole at slag interface, inhibit tundish slag；3) tundish stops after pouring, and stopping is passed through gas；This method can eliminate slag caused by conflux vortex, and the slag for effectively inhibiting the heavy hole of drainage caused reduces molten steel in tundish and pours surplus, improves molten steel recovery rate.
Description
Technical field
The invention belongs to continuous casting of iron and steel technical fields, and in particular to a kind of tundish bottom with cover is breathed freely in ring and its control
Between packet slag method.
Background technology
Tundish slag control is always to perplex one of the problem of economic clean steel production in casting process.It is poured in tundish
Latter stage is noted, as tundish liquid level declines, leads to the tundish slag caused by confluence whirlpool and the heavy hole of drainage etc., not only drops
Low cleanliness, and be easy to cause the accidents such as bleed-out.It generally stays steel to operate using tundish at present, i.e., is claimed by tundish
Technologies retain a large amount of molten steel to prevent tundish slag in tundish again etc., and a large amount of molten steel in tundish can be caused to pour in this way
It is remaining, reduce molten steel recovery rate.
Chinese patent literature CN107225231A discloses a kind of continuous casting production annular air curtain barricade wall and its molten steel air purge
Method.Annular air curtain barricade wall is blown into argon gas loaded on continuous casting production filling pipe end brick cup, Argon Bubble is generated, in filling pipe end brick cup
Surrounding forms air curtain barricade wall to the molten steel air purge for entering filling pipe end, effectively remove field trash.The patent is mainly for removal
The problem of field trash, the patent have the following disadvantages：The purpose of patent is being mingled in molten steel during removing basket pouring
Object does not consider the slag for solving the problems, such as basket pouring latter stage；The pressure controling parameter for being blown into argon gas is not provided clearly, it is real
Bad control Argon pressure in the production of border；It is blown into uninterrupted to control for standard with the fluctuation slightly of molten steel face, is increased artificial
The control difficulty of operation；Stop blowing argon gas after great Bao stops pouring, under cannot inhibiting in the middle packet of basket pouring latter stage generation
Slag phenomenon.
Chinese patent literature CN104028740B discloses a kind of continuous casting production Argon filling pipe end brick cup and its installation side
Method and application.Permeable-gas ceramics stick is set in pocket block ontology, argon gas is blown into tundish by pocket block, in Shang Shui
The air curtain barrier that annular is formed around mouthful, the molten steel to that will enter filling pipe end carry out air purge, promote inclusion floating and removal,
Inhibit the filling pipe end eddy generation slag problem under the conditions of tundish low liquid level.The patent has the following disadvantages：The patent is main
It is directed to the cleaning of tundish upper nozzle region molten steel, the floating of field trash is promoted to remove；But due to not specific flow
Control parameter, goes to be mingled with effect and is difficult to ensure；Ceramic ventilation rods diameter is too small, is unfavorable for gas circulation, can not effectively prevent
Only whirlpool (vortex) slag problem；Influence of the heavy hole of drainage to ladle roughing slag is not accounted for, under can not causing for drainage counterbore
Slag proposes control measure, without fundamentally solving the problems, such as tundish slag；The quantity of permeable-gas ceramics stick is excessive and length is long,
Pocket block production cost is high；Whole Argon in the entire casting process of tundish, cost is excessively high, and long-time Argon will certainly be led
It causes molten steel temperature drop big, the cast of tundish low overheat stable state is caused to be difficult to realize；The big production of the technique is difficult to scale application.
Chinese patent literature CN102764868B discloses a kind of blowing refining for removing tundish molten steel inclusion
Device and method is equipped with blowning installation in tundish bottom, impregnating cover is arranged above blowning installation, introduces the air curtain gear of atm number
Wall improves MOLTEN STEEL FLOW behavior, achievees the purpose that be mingled with.The patent has the following disadvantages：Atm number gassing time is long, cost
Height, and molten steel temperature drop is big in tundish, is unfavorable for the cast of tundish low overheat stable state.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of ventilative ring of tundish bottom with cover and its control tundish
The method of slag；The device around tundish bottom tapping hole with cover by being arranged ring of breathing freely, and in tundish, one is poured secondary pour
Latter stage is noted, by being blown into inert gas in ventilative circumferential tundish, forms steel at the slag interface above tundish tapping hole
Liquid exposed " boss area " effectively inhibits confluence whirlpool and drainage to sink and cheats caused tundish slag, reduces Metal in Tundish
Surplus is poured, the recovery rate of molten steel is improved.
The ventilative ring of the tundish bottom with cover of the present invention, is circumferentially positioned at around middle water containing opening brick cup；Ventilative ring is circle
Columnar structures；Upper surface is circular ring shape, and the internal diameter of maximum cross-section span≤upper surface annulus of 1.5 times of middle water containing opening brick cups
The maximum cross-section span of≤2 times of middle water containing opening brick cups, ring height=tundish packet bottom height of breathing freely.
The tundish bottom ring-type with cover breathe freely tapping hole ventilative ring upper surface annulus width be 20~
150mm。
The position of the described ventilative ring setting around middle water containing opening brick cup, the ring upper surface internal radius D1 that breathes freely >=
The maximum cross-section span L of 1.5 middle water containing opening brick cups；The principle of setting is：During basket pouring, near pocket block
It corrodes seriously, to prevent ventilative ring to be etched, bleed-out accident occurs, ring of breathing freely is arranged has certain distance away from pocket block.
The position of the ventilative ring setting is around middle water containing opening brick cup, ring upper surface internal radius D1≤2 of breathing freely
The maximum cross-section length L of middle water containing opening brick cup；The principle of setting is：It, can be in tapping hole for the control slag effect that ensures to blow
Top forms exposed " the boss area " of molten steel, and ventilative distance of the ring away from tapping hole must not be too far away.
The present invention is specifically comprised the following steps using the method for the ventilative ring control tundish slag of tundish bottom with cover：
Step 1：The ventilative ring of tundish bottom with cover is connected to blowning installation；Wherein, the gas of blowning installation input is
Inert gas；
Step 2：In basket pouring to latter stage, when liquid steel level height in tundish: tundish height=1: (4~5)
When, by being passed through gas in ventilative circumferential tundish, make to form the exposed circle of molten steel above tundish tapping hole at slag interface
Convex region inhibits tundish slag；Wherein, the pressure of air blowing gas is：0.32~0.55MPa, gas flow are 2~15Nm3/h；
Step 3：Tundish stops after pouring, and stopping is passed through gas.
The method of above-mentioned ring control slag of being breathed freely using tundish bottom with cover；Wherein,
In the step 1, inert gas is argon gas.
In the step 2, when liquid steel level height is 250~550mm in the tundish, by ventilative circumferential intermediate
Gas is passed through in packet.
In the step 2, basket pouring latter stage refers to：One is poured last secondary stove ladle and starts to be poured into tundish
When interior.
In the step 2, boss area refers to：Gas, which floats, reaches molten steel surface, gas-liquid separation, and gas enters air, quilt
Effect of the molten steel due to inertia force for driving and pouring into liquid level forms a region for having certain diameter, referred to as " boss in liquid level
Area ".
The tundish with cover refers to：It installs tundish cover on tundish additional, makes to be inert gas in air blowing tundish
Atmosphere avoids " boss area " molten steel exposed the problem of causing secondary oxidation of steel.
The method tundish bottom with cover of the present invention ventilative ring tapping hole and its control tundish slag, with the prior art
It compares, advantages of the present invention and advantageous effect are：
(1) present invention is to pour time latter stage in tundish one, and argon is blown into when molten steel liquid level height is close to slag critical altitude
Argon gas is blown into molten steel, in centre by gas by being combined ventilative ring position, width and Argon pressure, flow by ventilative ring
Slag gold interface forms exposed " the boss area " of molten steel above packet tapping hole, after molten steel flows through the argon gas ring near the tapping hole
Rotary speed disappears, to be inherently eliminated the slag caused by conflux vortex；Simultaneously as square steel on tundish tapping hole
Liquid surface exposure (does not have slag blanket), the slag for effectively inhibiting the heavy hole of drainage caused.In addition, due to installing tundish cover additional,
It is atmosphere of inert gases in entire tundish, good heat insulation effect not only is surrounded by centre, while it is naked to effectively prevent molten steel
Secondary oxidation phenomenon caused by dew.
(2) present invention not only effectively inhibits the clinker in tundish to enter crystallizer, but also further improves molten steel
Recovery rate, saved cost, avoided unnecessary temperature drop.
Description of the drawings
The existing tundish bottom brick cup argon-blowing device process schematic representation of Fig. 1 tradition；
Device technique schematic diagram in Fig. 2 embodiment of the present invention 1~3；
The ventilative loop device side view of tundish bottom in Fig. 3 embodiment of the present invention 1~3；
The ventilative loop device vertical view of tundish bottom in Fig. 4 embodiment of the present invention 2~3；
In figure：1：Valve；2：Pressure gauge；3：Flowmeter；4：Tapping hole；5：Pocket block；6 ventilative rings；7：Molten steel；In 8
Between packet backpack body；9：Tundish cover；10：Slag blanket.
Specific implementation mode
Device technique schematic diagram in following example 1~3 as shown in Fig. 2, wrap the ventilative loop device side in bottom among it
The loop device vertical view as shown in figure 3, the tundish bottom in embodiment 2~3 is breathed freely is schemed as shown in figure 4, the existing centre of tradition
It is as shown in Figure 1 to wrap bottom brick cup argon-blowing device process schematic representation.
Embodiment 1
The tundish used in the present embodiment is 25 ton.
A kind of ventilative ring of tundish bottom with cover, is circumferentially positioned at around middle water containing opening brick cup (5)；Ventilative ring (6) is
Cylindrical structure；Upper surface is circular ring shape, and maximum cross-section span≤upper surface annulus of 1.5 times of middle water containing opening brick cups (5)
Internal diameter≤2 times middle water containing opening brick cup (5) maximum cross-section span, breathe freely ring (6) height=tundish packet bottom height.
The middle water containing opening brick cup (5) is cylinder, and maximum cross-section span is 300mm, on the ventilative ring (6)
End face internal radius D1 is 450mm.
The width of ventilative ring (6) upper surface annulus of the ventilative ring of the tundish bottom with cover is 20mm.
The method of above-mentioned ring control slag of being breathed freely using tundish bottom with cover, is specifically comprised the following steps：
Step 1：The ventilative ring (6) of tundish bottom with cover is connected to blowning installation；Wherein, the gas of blowning installation input
For argon gas；
Step 2：In basket pouring latter stage, when molten steel (7) liquid level is 250mm in tundish, pass through ring of breathing freely
(7) it is passed through gas into tundish, makes to form the exposed boss area of molten steel, suppression above tundish tapping hole (4) at slag interface
Tundish slag processed；Wherein, the pressure of air blowing gas is：0.32MPa, gas flow 3Nm3/h；
Step 3：Tundish stops after pouring, and stopping is passed through gas.
Using process above parameter, compared with traditional tundish stays steel operation and control slag technique, basket pouring end
Phase molten steel pours surplus and reduces 25%.
Embodiment 2
The tundish used in the present embodiment is 35 ton.
A kind of ventilative ring of tundish bottom with cover, is circumferentially positioned at around middle water containing opening brick cup (5)；Ventilative ring (6) is
Cylindrical structure；Upper surface is circular ring shape, and maximum cross-section span≤upper surface annulus of 1.5 times of middle water containing opening brick cups (5)
Internal diameter≤2 times middle water containing opening brick cup (5) maximum cross-section span, breathe freely ring (6) height=tundish packet bottom height.
The middle water containing opening brick cup (5) is cube shaped, and maximum cross-section span is 300mm, the ventilative ring (6)
Upper surface internal radius D1 is 480mm.
The width of ventilative ring (6) upper surface annulus of the ventilative ring of the tundish bottom with cover is 50mm.
The method of above-mentioned ring control slag of being breathed freely using tundish bottom with cover, is specifically comprised the following steps：
Step 1：The ventilative ring (6) of tundish bottom with cover is connected to blowning installation；Wherein, the gas of blowning installation input
For argon gas；
Step 2：In basket pouring latter stage, when molten steel (7) liquid level is 400mm in tundish, pass through ring of breathing freely
(7) it is passed through gas into tundish, makes to form the exposed boss area of molten steel, suppression above tundish tapping hole (4) at slag interface
Tundish slag processed；Wherein, the pressure of air blowing gas is：0.38MPa, gas flow 7Nm3/h；
Step 3：Tundish stops after pouring, and stopping is passed through gas.
Using process above parameter, compared with traditional tundish stays steel operation and control slag technique, basket pouring end
Phase molten steel pours surplus and reduces 32%.
Embodiment 3
The tundish used in the present embodiment is 45 ton.
A kind of ventilative ring of tundish bottom with cover, is circumferentially positioned at around middle water containing opening brick cup (5)；Ventilative ring (6) is
Cylindrical structure；Upper surface is circular ring shape, and maximum cross-section span≤upper surface annulus of 1.5 times of middle water containing opening brick cups (5)
Internal diameter≤2 times middle water containing opening brick cup (5) maximum cross-section span, breathe freely ring (6) height=tundish packet bottom height.
The middle water containing opening brick cup (5) is cube shaped, and maximum cross-section span is 350mm, the ventilative ring (6)
Upper surface internal radius D1 is 550mm.
The width of ventilative ring (6) upper surface annulus of the ventilative ring of the tundish bottom with cover is 150mm.
The method of above-mentioned ring control slag of being breathed freely using tundish bottom with cover, is specifically comprised the following steps：
Step 1：The ventilative ring (6) of tundish bottom with cover is connected to blowning installation；Wherein, the gas of blowning installation input
For argon gas；
Step 2：In basket pouring latter stage, when molten steel (7) liquid level is 550mm in tundish, pass through ring of breathing freely
(7) it is passed through gas into tundish, makes to form the exposed boss area of molten steel, suppression above tundish tapping hole (4) at slag interface
Tundish slag processed；Wherein, the pressure of air blowing gas is：0.55MPa, gas flow 15Nm3/h；
Step 3：Tundish stops after pouring, and stopping is passed through gas.
Using process above parameter, compared with traditional tundish stays steel operation and control slag technique, basket pouring end
Phase molten steel pours surplus and reduces 38%.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be apparent to an ordinarily skilled person in the art that the technical side of the present invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Right in.
Claims (4)
- The ring 1. a kind of tundish bottom with cover is breathed freely, which is characterized in that the ventilative ring of the tundish bottom with cover is circumferentially positioned at Around middle water containing opening brick cup；Ventilative ring is cylindrical structure；Upper surface is circular ring shape, and 1.5 times of middle water containing opening brick cups The maximum cross-section span of the internal diameter≤2 times middle water containing opening brick cup of maximum cross-section span≤upper surface annulus, ring height of breathing freely= Tundish packet bottom height.
- The ring 2. a kind of tundish bottom with cover according to claim 1 is breathed freely, which is characterized in that the tundish with cover The width of the ventilative ring upper surface annulus of the ventilative tapping hole of bottom annular is 20~150mm.
- 3. the method for ring control tundish slag of being breathed freely using tundish bottom with cover described in claim 1, which is characterized in that Include the following steps：Step 1：The ventilative ring of tundish bottom with cover is connected to blowning installation；Wherein, the gas of blowning installation input is inertia Gas；Step 2：In basket pouring latter stage, when liquid steel level height in tundish: tundish height=1: when (4~5), passing through It is passed through gas in ventilative circumferential direction tundish, makes to form the exposed boss area of molten steel, suppression above tundish tapping hole at slag interface Tundish slag processed；Wherein, the pressure of air blowing gas is：0.32~0.55MPa, gas flow are 2~15Nm3/h；Step 3：Tundish stops after pouring, and stopping is passed through gas.
- The method of ring control slag 4. tundish bottom with cover according to claim 3 is breathed freely, which is characterized in that the step In rapid 2, when liquid steel level height is 250~550mm in the tundish, by being passed through gas in ventilative circumferential tundish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309398.5A CN108500252A (en) | 2018-04-09 | 2018-04-09 | A kind of tundish bottom with cover is breathed freely ring and its method that controls tundish slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309398.5A CN108500252A (en) | 2018-04-09 | 2018-04-09 | A kind of tundish bottom with cover is breathed freely ring and its method that controls tundish slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108500252A true CN108500252A (en) | 2018-09-07 |
Family
ID=63380783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810309398.5A Pending CN108500252A (en) | 2018-04-09 | 2018-04-09 | A kind of tundish bottom with cover is breathed freely ring and its method that controls tundish slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108500252A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109158554A (en) * | 2018-10-31 | 2019-01-08 | 中国科学院金属研究所 | A kind of bottom filling purifying smelting device and smelting process |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910900A (en) * | 1995-06-23 | 1997-01-14 | Sumitomo Metal Ind Ltd | Method for highly purifying molten steel in tundish |
| JP2002205150A (en) * | 2000-12-28 | 2002-07-23 | Nkk Corp | Method for continuously casting steel |
| CN201728365U (en) * | 2009-05-12 | 2011-02-02 | 颜正国 | Steel ladle and tundish slag carry-over control device |
| CN104028739A (en) * | 2014-06-18 | 2014-09-10 | 莱芜钢铁集团有限公司 | Ladle gas-permeable upper nozzle pocket block and nozzle slag entrapment control method implemented by same |
| CN104028740A (en) * | 2014-06-18 | 2014-09-10 | 莱芜钢铁集团有限公司 | Upper pocket block for argon blowing of continuous casting tundish and mounting method and application of upper pocket block |
| CN104525929A (en) * | 2014-12-18 | 2015-04-22 | 东北大学 | Method for controlling steel ladle tapping slag by blowing argon gas to annular steel outlet in bottom of steel ladle |
| CN107225231A (en) * | 2017-07-14 | 2017-10-03 | 山东钢铁股份有限公司 | A kind of annular air curtain barricade wall of continuous casting production and its molten steel air purge method |
| CN107234217A (en) * | 2017-07-14 | 2017-10-10 | 山东钢铁股份有限公司 | A kind of ar blowing refining method for being used to produce SPHC steel grades |
-
2018
- 2018-04-09 CN CN201810309398.5A patent/CN108500252A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910900A (en) * | 1995-06-23 | 1997-01-14 | Sumitomo Metal Ind Ltd | Method for highly purifying molten steel in tundish |
| JP2002205150A (en) * | 2000-12-28 | 2002-07-23 | Nkk Corp | Method for continuously casting steel |
| CN201728365U (en) * | 2009-05-12 | 2011-02-02 | 颜正国 | Steel ladle and tundish slag carry-over control device |
| CN104028739A (en) * | 2014-06-18 | 2014-09-10 | 莱芜钢铁集团有限公司 | Ladle gas-permeable upper nozzle pocket block and nozzle slag entrapment control method implemented by same |
| CN104028740A (en) * | 2014-06-18 | 2014-09-10 | 莱芜钢铁集团有限公司 | Upper pocket block for argon blowing of continuous casting tundish and mounting method and application of upper pocket block |
| CN104525929A (en) * | 2014-12-18 | 2015-04-22 | 东北大学 | Method for controlling steel ladle tapping slag by blowing argon gas to annular steel outlet in bottom of steel ladle |
| CN107225231A (en) * | 2017-07-14 | 2017-10-03 | 山东钢铁股份有限公司 | A kind of annular air curtain barricade wall of continuous casting production and its molten steel air purge method |
| CN107234217A (en) * | 2017-07-14 | 2017-10-10 | 山东钢铁股份有限公司 | A kind of ar blowing refining method for being used to produce SPHC steel grades |
Non-Patent Citations (5)
| Title |
|---|
| R.J.FRUEHAN: "《盛钢桶冶金学》", 31 October 1922, 冶金工业出版社 * |
| 万真雅: "《钢铁冶金设计原理》", 30 June 1992, 重庆大学出版社 * |
| 张垒: "吹氩", 《中国硕士学位论文全文数据库工程科技I辑》 * |
| 时彦林: "《连铸工培训教程》", 31 July 2013, 冶金工业出版社 * |
| 游杰刚: "《钢铁冶金用耐火材料》", 30 June 2014, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109158554A (en) * | 2018-10-31 | 2019-01-08 | 中国科学院金属研究所 | A kind of bottom filling purifying smelting device and smelting process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106041045B (en) | A kind of continuous casting production disperse formula is breathed freely ring filling pipe end brick cup and its ar blowing refining method | |
| CN108176844B (en) | A kind of device and method for clearing up tundish upper nozzle dross object | |
| CN107321945B (en) | A kind of method of purging upper nozzle for continuous casting tundish brick cup Argon removal of inclusions | |
| CN103990786B (en) | A kind of for removing the device and method of molten steel field trash in double flow tray billet continuous casting machine tundish | |
| CN104525929B (en) | A kind of method that ladle roughing slag is controlled by ladle bottom ring tapping hole blowing argon gas | |
| CN109332625B (en) | Casting method for improving stopper rod flow control Al deoxidized steel nozzle blockage | |
| CN206966634U (en) | A kind of improved ladle upper nozzle brick cup | |
| CN102303113B (en) | Continuous casting tundish porous baffle wall having functions of casting and calcium treatment | |
| CN200991751Y (en) | Four-hole immersible water-gap for large-square blank continuous casting | |
| CN108265149A (en) | A kind of method of ring converter taphole air blowing control converter tapping slag | |
| CN102728827B (en) | Continuous casting tundish capable of improving molten steel cleanliness | |
| CN103990772B (en) | A kind of metallurgical plant removing double flow tray billet continuous casting machine tundish inclusion | |
| CN208146911U (en) | A kind of ladle ventilating filling pipe end brick cup | |
| CN1132483A (en) | Purifying molten metal | |
| CN108500252A (en) | A kind of tundish bottom with cover is breathed freely ring and its method that controls tundish slag | |
| CN105983684A (en) | Low-carbon inner hole body-contained submersed nozzle | |
| CN205270835U (en) | Package be built by contract argon blowing device in middle of continuous slab casting | |
| CN109047695B (en) | A kind of immersed nozzle for continuous casting mould Argon control method | |
| CN209239047U (en) | A kind of continuous casting production air swirl filling pipe end brick cup | |
| CN109108240A (en) | A kind of continuous casting production air swirl filling pipe end brick cup | |
| CN108273987A (en) | A kind of ladle ventilating filling pipe end brick cup and its method for controlling ladle roughing slag | |
| KR100907949B1 (en) | The casting sprue for large size thin-thickness aluminum alloy | |
| GB2149699A (en) | Method and apparatus for avoiding vortexing in a bottom pour vessel | |
| CN210498354U (en) | Double-core integral air brick | |
| CN206230019U (en) | A kind of ventilative ring filling pipe end brick cup of continuous casting production disperse formula |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180907 |
|
| RJ01 | Rejection of invention patent application after publication |