CN106735143A - A kind of application method of IF steel tundish - Google Patents
A kind of application method of IF steel tundish Download PDFInfo
- Publication number
- CN106735143A CN106735143A CN201611078033.3A CN201611078033A CN106735143A CN 106735143 A CN106735143 A CN 106735143A CN 201611078033 A CN201611078033 A CN 201611078033A CN 106735143 A CN106735143 A CN 106735143A
- Authority
- CN
- China
- Prior art keywords
- steel
- dam
- tundish
- pod apertures
- molten steel
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 309
- 239000010959 steel Substances 0.000 title claims abstract description 309
- 238000000034 method Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 claims abstract description 33
- 238000009749 continuous casting Methods 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims abstract description 9
- 230000002045 lasting effect Effects 0.000 claims abstract description 7
- 230000001629 suppression Effects 0.000 claims description 55
- 239000002893 slag Substances 0.000 claims description 34
- 239000010813 municipal solid waste Substances 0.000 claims description 23
- 239000011819 refractory material Substances 0.000 claims description 14
- 238000010792 warming Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/057—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on calcium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/386—Boron nitrides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of application method of IF steel tundish, belong to Ferrous Metallurgy continuous casting production technology field.The application method of IF steel tundish of the invention, comprises the following steps：(1) molten steel injection：When continuous casting is normally produced, IF steel molten steel is collected in the region that dam is surrounded；(2) lasting cast：The liquid level of IF steel molten steel is more than the height of dam in tundish body, and IF steel molten steel flows out from middle water containing opening；(3) latter stage is poured into a mould：Stop the injection of IF steel molten steel, the liquid level of IF steel molten steel is gradually reduced in tundish body, when the liquid level of IF steel molten steel in tundish body is less than the height of dam, the IF steel molten steel remained in the region that dam is surrounded is flowed out by pod apertures；(4) casting complete：By clogging of tundish nozzle, casting complete.The present invention is adapted to production IF steel and can significantly reduce molten steel note surplus.
Description
Present patent application is directed to Application No.：2016101893262 divisional application, the applying date of original application
For：2016-03-28, invention and created name is：A kind of IF steel tundish.
Technical field
The present invention relates to a kind of tundish for producing IF steel, more specifically to a kind of making for IF steel tundish
With method, belong to Ferrous Metallurgy continuous casting production technology field.
Background technology
IF steel, sometimes referred to as full name Interstitial-Free Steel, i.e. gapless atomic steel, ultra-low-carbon steel, has
Extremely excellent deep drawability, current elongation and r values can have been obtained extensively in auto industry respectively up to 50% and more than 2.0
Using.In IF steel, because C, N content are low, add the strong carboritride such as a certain amount of titanium (Ti), niobium (Nb) and form unit
Element, carboritride is completely fixed for by interstitial atoms such as the carbon in ultra-low-carbon steel, nitrogen, and gap-free atom is clean obtained from
Net ferritic steel, as Ultra-low carbon gapless atomic steel (Interstitial Free Steel).
Tundish is the refractory material containers used in smelter STEELMAKING PRODUCTION flow, receives to be poured from ladle first
The molten steel for getting off, is then assigned in each crystallizer by middle water containing opening again.Flow control dress is set in continuous casting tundish
Put, to change the running route of molten steel in tundish, residence time of the extension molten steel in tundish, with promotion field trash
Floating mat is removed, and is reduced strand inner inclusion, is changed the metallurgical function of inclusion morphology.With the development of metallurgical technology, in tundish
Metallurgical method be continuously developed.Such as patent publication No.：The Y of CN 2936498, publication date：On August 22nd, 2007, invention wound
Make entitled：A kind of slag blocking dam of middle ladle, this application case discloses a kind of slag blocking dam of middle ladle, the dam without pod apertures, outward
Column is seen into, side arcwall face, opposite side is plane, hollow, whole shape is in " Kei-shaped ", is made up of magnesia refractories,
Circular or curved wall apparent height is the 1/2~2/3 of tundish head room；The dam is simply easily made, with low cost, can have
Effect improves slab quality；But, conventional art is concentrated mainly on continuous casting normal productive process, for the research in continuous casting latter stage
Seldom, this application case is not just because of taking into full account continuous casting latter stage so that tundish cast latter stage molten steel residual volume compared with
It is many, and then cause that molten steel recovery rate is low, economic benefit is not good.
In recent years, technical staff starts gradually to pay close attention to the cast latter stage of continuous casting, such as patent publication No.：CN
103302259 A, publication date：On September 18th, 2013, invention and created name is：A kind of continuous casting production dam and its preparation
Method, this application case is related to a kind of continuous casting production dam and preparation method thereof, two water conservancy diversion of continuous casting production dam
Hole is symmetrical arranged relative to dam body longitudinal centre line, and the pod apertures center of circle is located at longitudinal centre line or so 1/4~3/8 respectively
Place, and the pod apertures center of circle is at dam body cross central line top 1/8~1/4, the axial line positive pitch β of pod apertures
It is 15 °~20 °；The continuous casting production dam long service life of this application case, while by convincing discharge orifice reality by patient analysis on dam
The molten steel residual volume in cast latter stage is now reduced, so as to improve molten steel recovery rate, increases economic benefit.But, such dam is opened
The tundish of pod apertures is only capable of being used in the general steel grade of quality of production requirement, because general steel grade is to field trash size sum
Amount is without strict demand, but (this steel grade is higher to field trash requirement in strand, and field trash equivalent diameter typically will when production IF steel
Ask and be necessarily less than 100 μm) when, then cannot use such tundish；And increased tundish using the dam without pod apertures
Note surplus, molten steel recovery rate is low, has raised the steel technology of continuous casting billet, increased production cost.
In sum, how to design a kind of suitable production IF steel and significantly reduce the tundish that molten steel notes surplus, be existing
There is the technical barrier of urgent need to resolve in technology.
The content of the invention
1. the invention technical problem to be solved
IF steel it is an object of the invention to overcome purity requirements in the prior art high is noted in continuous casting latter stage molten steel
A kind of surplus problem higher, there is provided application method of IF steel tundish, is adapted to production IF steel and can significantly reduce molten steel note
Surplus.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
IF steel tundish of the invention, including tundish body, middle water containing opening and pushing off the slag are provided with the tundish body
Dam, the middle water containing opening is located at tundish body bottom portion, and the dam is surrounded and middle water containing opening in tundish body
The region separated, and dam surrounds the bottom in region and is connected with middle water containing opening.
Further improved as IF steel tundish of the invention, the bottom that dam surrounds region is provided with pad level,
Pod apertures are provided with the pad level, with middle water containing opening be connected for the bottom that dam surrounds region by the pod apertures.
Further improved as IF steel tundish of the invention, the pod apertures are to include vertical section and horizontal segment
" L " shape through hole, the bottom that the pod apertures vertical section surrounds region with dam connects, and pod apertures horizontal segment is close to tundish body
Bottom is set, and pod apertures horizontal segment is connected with middle water containing opening；Pod apertures vertical section is circular arc company with the junction of horizontal segment
Connect.
Further improved as IF steel tundish of the invention, the pod apertures have two groups, two groups of pod apertures on
Same middle water containing opening is symmetrical arranged, and every group of pod apertures at least include a pod apertures.
Further improved as IF steel tundish of the invention, the middle water containing opening has two, and two centres
Water-coating port surrounds the both sides in region positioned at dam respectively；The pod apertures have two groups, and two groups of pod apertures are respectively by dam
Surround that the bottom in region is corresponding with two middle water containing openings to be connected, every group of pod apertures at least include a pod apertures.
Further improved as IF steel tundish of the invention, also including suppression whirlpool device one, pod apertures vertical section with
The interface that dam surrounds the bottom in region is respectively provided on two sides with a suppression whirlpool device one, and the suppression whirlpool device one is to include erecting
The angle in straight line and umbrella cover portion where straight section and " umbrella " the shape structure in vertical section top umbrella cover portion, and the vertical section is 120 °~
180°。
Further improved as IF steel tundish of the invention, also including suppression whirlpool device two, the suppression whirlpool device two
It is rectangular block, suppression whirlpool device two is located at the interface side that pod apertures vertical section surrounds the bottom in region with dam, and suppression whirlpool
One end of device two contacts with dam medial surface, and the other end of suppression whirlpool device two does not cover the interface；
Suppression whirlpool device two is made up of the refractory material of following mass percent：0.1~6.6%SiC, 0.1~4.5%BN,
85~92%CaO, 3.5~7.3%MnO, 0.1~1.9%Al2O3,0.1~5.3%SiO2,1.4~5.6%ZrO2；Wherein,
The manufacture method of suppression whirlpool device two is as follows：
(1) by after above-mentioned refractory material dispensing, add dry-mixed 5~10 minutes in batch mixer, be subsequently adding and account for refractory material
The water of gross weight 6.9~7.5%, wet mixing 10~15 minutes；
(2) the good material of wet mixing is put into loose tool, vibrating head vibration moulding, the green compact of suppression whirlpool device two is used in charging
Manufacture is completed, and green compact are conserved into 24~30h at a temperature of 5~30 DEG C；
(3) toast and cool down, be divided into the next stage：150 are warming up to from 5~30 DEG C of programming rates with 25~30 DEG C/h~
8~9h is incubated after 180 DEG C；10~12h is incubated after being warming up to 300~320 DEG C with the programming rate of 25~30 DEG C/h again；Again with 25
The programming rate of~30 DEG C/h is incubated 12~15h after being warming up to 550~575 DEG C；30~35h of last natural cooling, presses down whirlpool device
Two manufactures are completed.
Further improved as IF steel tundish of the invention, dam surrounds at least three in tundish body
The region separated with middle water containing opening, and the bottom in region that each dam is surrounded is by pod apertures and tundish water
Mouth is connected.
The manufacture method of IF steel tundish of the invention, comprises the following steps：
(1) three-dimensional modeling：The 3-D geometric model of pod apertures is drawn using 3 d modeling software；
(2) 3D printing：The 3-D geometric model of pod apertures is input into 3D printer, 3D printing goes out the bend pipe of ABS materials,
The bend pipe matches with the physical dimension of pod apertures；
(3) bend pipe is installed：During IF steel tundish is built by laying, the bend pipe is imbedded in pad level；
(4) dam is installed：Dam is attached in tundish body；
(5) water conservancy diversion hole forming：IF steel tundish is toasted, the bend pipe heated combustion of ABS materials disappears in baking process
Lose, the satisfactory pod apertures of physical dimension are formed in pad level.
The application method of IF steel tundish of the invention, comprises the following steps：
(1) molten steel injection：When continuous casting is normally produced, IF steel molten steel is injected into the area that dam is surrounded in tundish body
Domain, IF steel molten steel is collected in the region that dam is surrounded；Wherein, the IF steel molten steel includes the unit of following mass percent
Element：0.001~0.003%C, 0.011~0.025%Si, 0.11~0.19%Mn, 0.003~0.006%P, 0.003~
0.007%S, 0.0015~0.0040%N；
(2) lasting cast：With the lasting injection of IF steel molten steel, the liquid level of IF steel molten steel is more than pushing off the slag in tundish body
The height on dam, IF steel molten steel flows out from middle water containing opening；
(3) latter stage is poured into a mould：Stop the injection of IF steel molten steel, the liquid level of IF steel molten steel is gradually reduced in tundish body, when
When the liquid level of IF steel molten steel is less than the height of dam in tundish body, the IF steel molten steel remained in the region that dam is surrounded
Flowed out by pod apertures；
(4) casting complete：When the IF steel molten steel liquid levels remained in the region that dam is surrounded drop to certain altitude, will
Clogging of tundish nozzle, casting complete；Wherein, field trash equivalent diameter is less than 100 μm in strand after continuous casting.
3. beneficial effect
The technical scheme provided using the present invention, compared with prior art, with following remarkable result：
(1) IF steel tundish of the invention, " L " shape pod apertures can not directly impact middle water containing opening region molten steel liquid
Under conditions of face, molten steel is emptied to greatest extent, " umbrella " shape suppression whirlpool device one can prevent field trash from entering molten steel inside ensuring
Molten Steel Cleanliness, the two synergy can be only achieved and reduced under conditions of Molten Steel Cleanliness is ensured the purpose that molten steel notes surplus,
Meet the quality requirement of IF steel, realize increasing the target of Business Economic Benefit.
(2) IF steel tundish of the invention, two pod apertures are symmetrically disposed in the both sides of same middle water containing opening, from
And enabling that molten steel symmetrically flows into same middle water containing opening by two pod apertures respectively, symmetrically arranged pod apertures can disappear
Except the easy deficiency that bottom vortex is formed about in middle water containing opening of single pod apertures is set, slag can be prevented effectively from.
(3) because the structure of pod apertures is special, using traditional handicraft it is difficult to ensure that the dimensional accuracy of pod apertures, and then influence
The using effect of IF steel tundish, and by the manufacture method of IF steel tundish of the invention, pod apertures can be accurately controlled
Dimensional accuracy, so that it is guaranteed that IF steel tundish produced by the present invention is effectively used.
Brief description of the drawings
Fig. 1 is the main cross section structure diagram of the IF steel tundish of embodiment 1；
Fig. 2 is the left view structural representation of the IF steel tundish of embodiment 2；
Fig. 3 is the main cross section structure diagram of the IF steel tundish of embodiment 3；
Fig. 4 is the main cross section structure diagram of the IF steel tundish of embodiment 4；
Fig. 5 is the main cross section structure diagram of the IF steel tundish of embodiment 5；
Fig. 6 is the main cross section structure diagram of the IF steel tundish of embodiment 6；
Fig. 7 is the main cross section structure diagram of the IF steel tundish of embodiment 7；
Fig. 8 is the FB(flow block) of the manufacture method of the IF steel tundish of embodiment 8；
Fig. 9 is the FB(flow block) of the application method of the IF steel tundish of embodiment 9.
Label declaration in schematic diagram：
1st, tundish body；101st, dam；102nd, pad level；103rd, tundish body bottom portion；104th, middle water containing opening；
105th, pod apertures；106th, suppression whirlpool device one；107th, suppression whirlpool device two.
Specific embodiment
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
With reference to Fig. 1, the IF steel tundish of the present embodiment, including tundish body 1 and suppression whirlpool device 1, the tundish
Middle water containing opening 104 and dam 101 are provided with body 1, middle water containing opening 104 is located at tundish body bottom portion 103, dam
101 surround the region separated with middle water containing opening 104 in tundish body 1, and dam 101 surrounds the bottom in region
It is connected (i.e. relatively independent by installing the formation one in tundish body 1 of dam 101 first with middle water containing opening 104
Space, then the bottom of the separate space is connected with middle water containing opening 104).Specifically, dam 101 surrounds region
Bottom be provided with pad level 102, is provided with pod apertures 105 in the pad level 102, dam 101 is surrounded region by pod apertures 105
Bottom is connected with middle water containing opening 104.In the present embodiment, pod apertures 105 are to include that vertical section and " L " shape of horizontal segment are led to
Hole, the bottom that the vertical section of pod apertures 105 surrounds region with dam 101 connects, and the horizontal segment of pod apertures 105 is close to tundish sheet
Body bottom 103 is set, and the horizontal segment of pod apertures 105 is connected with middle water containing opening 104；The vertical section of pod apertures 105 and horizontal segment
Junction is circular sliding slopes.The interface of the bottom that the vertical section of pod apertures 105 surrounds region with dam 101 is respectively provided on two sides with
One suppression whirlpool device 1, suppression whirlpool device 1 is " umbrella " the shape structure for including vertical section and vertical section top umbrella cover portion, and
Straight line where above-mentioned vertical section and the angle in umbrella cover portion are 120 °~180 ° (120 ° are taken in specific the present embodiment).
In continuous casting latter stage, the height of the liquid level less than dam of molten steel can cause that a large amount of molten steel remain in dam
In the region for surrounding, it is impossible to be used effectively, cause that molten steel recovery rate is low, economic benefit is not good.Regarding to the issue above, existing skill
Propose to be opened up in dam side fixed position the scheme of through hole in art, although the program reduces centre to a certain extent
Baogang's water note surplus, but there is problems：(1) dam of the prior art is mainly using fire resistings such as magnesia or magnalium matter
Material is made, and dam is vertically arranged, and that bears molten steel for a long time washes away erosion and static pressure, in actual applications dam meeting
Damage, finds that the damage of dam is typically in its side through hole by studying, and under the physics and chemical action of molten steel, leads to
Hole borehole enlargement, and be uneven expansion, the original aperture and flow field for passing through hydraulic analogy and calculating thus is changed,
The effect of original design can not be played；After through hole constantly expands, the bulk strength of dam is reduced, finally make dam
Fracture and destroyed by rush of water, substantially reduce the service life of dam；(2) molten steel is direct from top to bottom by the through hole of dam side
The liquid steel level in the region of middle water containing opening 104 is flowed to, directly impact can be formed to the liquid steel level in the region of middle water containing opening 104,
Slag is formed, causes the liquid level slag blanket in the region of middle water containing opening 104 to be rolled into molten steel, finally form a large amount of big in strand
Type field trash；On the other hand, molten steel directly flows out from dam side through hole, can form more bright in dam side through hole
Aobvious turbulent flow and vortex, one when being that molten steel flows into middle water containing opening 104, and easily the molten steel in disturbance middle water containing opening 104 region, increases
Plus the liquid level slag blanket in the region of middle water containing opening 104 is rolled into the degree inside molten steel, two is that can be surrounded to remaining in dam
Molten steel in region forms disturbance so that dam surrounds liquid steel level slag blanket in region and is rolled into inside molten steel, same big
The big content that increased strand Large Inclusions；(3) through hole is located at the fixed position of dam side, as molten steel notes surplus
Reduction, dam surrounds the through hole that liquid steel level in region becomes closer to dam side, due to cannot intuitively observe
To liquid steel level and the real-time relative position of dam side through hole, easily cause the slag blanket near liquid steel level and pass through dam
Side through hole flows directly into the phenomenon in middle water containing opening 104, and with the decline of liquid steel level, the impurity near liquid steel level
Increasingly flowed out easily by dam side through hole, the final content for increasing field trash in strand.
General steel grade is not strict with to field trash size and number, but for production IF steel, then has strict requirements,
IF steel is higher to field trash requirement in strand, and field trash equivalent diameter typically requires to be necessarily less than 100 μm, and inventor is by a large amount of
Field experiment finds that opening up through hole in dam side fixed position in the prior art is not suitable for producing IF steel, by gear
Slag dam side fixed position opens up through hole to produce IF steel, can greatly increase the content of strand Large Inclusions, and influence is most
The IF steel qualities that are obtained eventually, gently then cause automobile factory to occur tiny defect in punching press Automobile Plate, heavy then cause Automobile Plate direct
Cracking forms waste product, has a strong impact on economic benefit, is much difficult to meet the requirement of IF steel actual productions.Therefore, how can control
On the basis of molten steel note surplus processed, the content of steel Large Inclusions is significantly reduced, meet the requirement of IF steel actual productions, be existing
There is a technical barrier for urgent need to resolve in technology.
In the present embodiment, the bottom that dam 101 surrounds region is connected with middle water containing opening 104, specifically, dam
101 bottoms for surrounding region are provided with pad level 102, are provided with pod apertures 105 in the pad level 102, pod apertures 105 be include it is vertical
" L " shape through hole of section and horizontal segment, the bottom that the vertical section of pod apertures 105 surrounds region with dam 101 connects, pod apertures
105 horizontal segments are set close to tundish body bottom portion 103, and the horizontal segment of pod apertures 105 is connected with middle water containing opening 104, water conservancy diversion
The vertical section of hole 105 is circular sliding slopes with the junction of horizontal segment；Wherein, the bottom for surrounding region in dam 101 sets padded
Layer 102, the space on the one hand installed there is provided pod apertures 105, is that molten steel surrounds region by pod apertures 105 from dam 101
Bottom outflow provide condition；On the other hand, pad level 102 can effectively resist the top-down erosion of molten steel, in raising
Between bag body 1 service life.Wherein, it is " L " the shape through hole for including vertical section and horizontal segment to set pod apertures 105 so that steel
During flowing, there is 90 ° of deflecting in water, slow down the speed of molten steel flowing in pod apertures 105 in pod apertures 105, be conducive to
Reduce impact of the molten steel from after the outflow of pod apertures 105 to the region molten steel of middle water containing opening 104, it is to avoid the region of middle water containing opening 104
Liquid level slag blanket be rolled into molten steel；Simultaneously as the horizontal segment of pod apertures 105 is set close to tundish body bottom portion 103, steel
When water flows to 104 region of middle water containing opening along the horizontal segment of pod apertures 105, the steel in the region of middle water containing opening 104 can be directly reached
Part below water level, will not form directly impact, it is to avoid middle water containing opening to the liquid steel level in the region of middle water containing opening 104
The liquid level slag blanket in 104 regions is rolled into molten steel, reduces the formation of strand steel Large Inclusions.Wherein, in pad level 102
Be provided with pod apertures 105, due to pad level 102 have certain thickness, and pad level 102 not by pod apertures 105 along whole horizontal stroke
To running through, its intensity is higher, is not susceptible to damage, meanwhile, the side of dam 101 is not provided with through hole, greatly reduces dam
101 probabilities for being destroyed by rush of water, hence it is evident that improve the service life of dam 101.Wherein, the vertical section of pod apertures 105 and dam 101
Surround the bottom connection in region, it is ensured that cast latter stage remains in the molten steel that dam surrounded in region and surrounds area along dam
The bottom outflow in domain, therefore, the slag blanket of liquid steel level is always positioned at the superiors during molten steel outflow, is easy to the height according to slag blanket
Control molten steel notes surplus to degree at any time, and ensures the slag blanket of liquid steel level not as molten steel flows out to middle water containing opening 104.
It should be noted that molten steel surrounds the bottom outflow in region from dam, can be in the vertical section of pod apertures 105 and pushing off the slag
The interface that dam 101 surrounds the bottom in region forms certain turbulent flow and vortex, in order to avoid above-mentioned turbulent flow and vortex cause casting
The increased phenomenon of base Large Inclusions content, a suppression whirlpool device 1, the suppression whirlpool are respectively provided on two sides with above-mentioned interface
Device 1 is straight line and umbrella where " umbrella " the shape structure for including vertical section and vertical section top umbrella cover portion, and above-mentioned vertical section
The angle of face is 120 °, it is emphasized that, inventor has found by simulated experiment, and the setting of suppression whirlpool device 1 can
Effective local buffer area is formed in above-mentioned interface both sides, turbulent flow and whirlpool that molten steel is formed in above-mentioned interface are weakened significantly
Stream, substantially reduces the content of steel Large Inclusions；In addition, the setting of the vertical section of suppression whirlpool device 1, reduces above-mentioned interface
Place top molten steel linear velocity in the horizontal direction, the setting in the umbrella cover portion of suppression whirlpool device 1 effectively slow down square steel on interface
The speed that water flows from top to bottom, it is to avoid liquid level slag blanket is involved in pod apertures from top to bottom under the drive of quick flowing molten steel
Phenomenon in 105.Inventor has found by multiple comparison test, straight line where above-mentioned vertical section is set with the angle in umbrella cover portion
It it is 120 °~180 °, suppression whirlpool device 1 weakens the best results of turbulent flow and vortex.
In the present embodiment, " L " shape pod apertures 105 can not directly impact the region liquid steel level of middle water containing opening 104
Under the conditions of, molten steel is emptied to greatest extent, " umbrella " shape suppression whirlpool device 1 can prevent field trash from entering molten steel inside ensuring steel
Water degree of purity, the two synergy can be only achieved and reduced under conditions of Molten Steel Cleanliness is ensured the purpose that molten steel notes surplus, full
The quality requirement of sufficient IF steel, realizes increasing the target of Business Economic Benefit；Specifically, " L " shape pod apertures 105 and " umbrella " shape press down whirlpool
Device 1 ensures that slag blanket is not rolled into inside molten steel jointly, strand Large Inclusions content is substantially reduced, using this reality
The IF steel tundish of example is applied, requirement of the IF steel to field trash in strand is disclosure satisfy that, verified through many experiments, using the present embodiment
The strand produced of IF steel tundish, its field trash equivalent diameter is respectively less than 100 μm.
In the prior art, to ensure slab quality, prevent from pouring into a mould latter stage due to Tundish Slag caused by the generation of vortex
Be involved in, it is however generally that tundish need to leave the molten steel of certain altitude, steel grade especially higher to Control and Inclusion Removal requirement, middle
Bag note reinforcement degree must be controlled in certain limit, therefore, molten steel recovery rate is relatively low.Using the IF steel tundish of the present embodiment, energy
Enough on the premise of the production of IF steel is met, hence it is evident that reduce the molten steel note surplus of tundish, certain steel mill uses the IF steel of the present embodiment
Before tundish, cast latter stage when the liquid steel level between two dams 101 is less than 101 height of dam, that is, stops cast, this
When two dams 101 between liquid steel level be highly 250mm, after the IF steel tundish of the present embodiment, cast latter stage is when two
When liquid steel level between dam 101 is less than 101 height of dam, molten steel is continued to flow out by pod apertures 105, when molten steel liquid
Face is down to during apart from 102 upper surface 65mm of pad level, i.e., molten steel 2.5 ton hours of residue in instrument display tundish, now stops immediately
Only cast (because liquid steel level whirlpool is fairly obvious in now tundish, should not be further continued for reducing liquid steel level), then passes through
The field trash in strand obtained by scanning electron microscopic observation, does not find more than 100 μm of field trash.By comparative experimental research table
It is bright, equally by liquid steel level in tundish of the dam side with through hole in the prior art be down to 65mm it is high when stop cast, lead to
The field trash in strand obtained by overscanning electron microscopic observation, discovery is clearly present being mingled with for a fairly large number of 100~300um
Thing, field trash source is mainly Tundish Slag.By above-mentioned description of test, using the IF steel tundish of the present embodiment, can be in control
System is not contained on the premise of equivalent diameter is more than 100 μm of field trashes and (meets the production requirement of IF steel), in reducing to greatest extent
Between wrap in remaining IF steel molten steel amount, so as to improve molten steel recovery rate, increase Business Economic Benefit.Specifically used the present embodiment
After IF steel tundish, the liquid steel level between the cast dam 101 of latter stage two reduces 175mm, the remaining molten steel amount for being reduced
Can be calculated, according to region between the dam 101 of tundish bottom two be a prismatoid (i.e. truncated rectangular pyramids), 5060mm long, on
Bottom width 1280mm, lower bottom width 1040mm, therefore, saving molten steel amount is：5.060×[0.5×(1.280+1.040)×0.175]
× 7.3=7.498t, wherein, the density of molten steel takes 7.3t/m3；With 2150 yuan/ton of pour steel average price, heavy-duty waste steel is put down
Equal 1310 yuan/ton of price, monthly average is calculated using 142 tundish, then year benefit is：12×142×7.498×(2150-
1310)=1073.23 ten thousand yuan, therefore using the IF steel tundish of the present embodiment, the economic benefit of enterprise can be significantly increased.
Embodiment 2
With reference to Fig. 2, the IF steel tundish of the present embodiment, its structure is substantially the same manner as Example 1, and its difference is：
Pod apertures 105 have two groups, and two groups of pod apertures 105 before and after same middle water containing opening 104 on being symmetrical arranged, and every group of pod apertures
105 at least include a pod apertures 105.In specific the present embodiment, pod apertures 105 have two, and two pod apertures 105 are on same
It is symmetrical arranged before and after one middle water containing opening 104.The IF steel tundish of the present embodiment, its main cross section structure diagram is identical with Fig. 1,
Reference picture 2 understands that two pod apertures 105 are symmetrically disposed in the both sides of same middle water containing opening 104, so that molten steel energy
Enough symmetrically to flow into same middle water containing opening 104 by two pod apertures 105 respectively, symmetrically arranged pod apertures 105 can be eliminated
The deficiency that single pod apertures 105 are easily formed about bottom vortex in middle water containing opening 104 is set, slag can be prevented effectively from.
Embodiment 3
With reference to Fig. 3, the IF steel tundish of the present embodiment, its structure is substantially the same manner as Example 1, and its difference is：
In the present embodiment, middle water containing opening 104 has two, and two middle water containing openings 104 surround region positioned at dam 101 respectively
Both sides；Pod apertures 105 have two, and two pod apertures 105 dam 101 is surrounded respectively region bottom and two tundish
The correspondence of the mouth of a river 104 is connected.Wherein, two pod apertures 105 are symmetrically disposed in pad level 102, and molten steel is along two water conservancy diversion
Hole 105 symmetrically surrounds the bottom outflow in region from dam 101, can effectively reduce molten steel and surround region from dam 101
When bottom is flowed out, in the vortex that above-mentioned interface is formed, the final content for effectively reducing strand Large Inclusions.Meanwhile, if
Two middle water containing openings 104 are put, the operating efficiency of the IF steel tundish that has been multiplied.
Embodiment 4
With reference to Fig. 4, the IF steel tundish of the present embodiment, its structure is substantially the same manner as Example 3, and its difference is：
Straight line where vertical section and the angle in umbrella cover portion are 180 ° in suppression whirlpool device 1.
Embodiment 5
With reference to Fig. 5, the IF steel tundish of the present embodiment, its structure is substantially the same manner as Example 3, and its difference is：
Suppression whirlpool device 1 in the present embodiment is replaced by suppression whirlpool device 2 107, and suppression whirlpool device 2 107 is rectangular block, suppression whirlpool device two
107 are located at the interface side that the vertical section of pod apertures 105 surrounds the bottom in region with dam 101, and press down whirlpool device 2 107
One end contacts with the medial surface of dam 101, and the other end of suppression whirlpool device 2 107 does not cover above-mentioned interface, suppression whirlpool device 2 107
Setting reduce above-mentioned interface top molten steel linear velocity in the horizontal direction, effectively inhibit the shape of interface top whirlpool
Into.Suppression whirlpool device 2 107 is made up of the refractory material of following mass percent：1.2%SiC, 2.2%BN, 85.4%CaO,
5.9%MnO, 1.3%Al2O3, 1.9%SiO2, 2.1%ZrO2(the suppression whirlpool device 2 107 of this composition is difficult to be invaded in molten steel
Erosion)；Wherein, the manufacture method of suppression whirlpool device 2 107 is as follows：
(1) by after above-mentioned refractory material dispensing, add dry-mixed 10 minutes in batch mixer, be subsequently adding and account for refractory material gross weight
The water of amount 7.5%, wet mixing 15 minutes；
(2) the good material of wet mixing is put into loose tool, vibrating head vibration moulding is used in charging, suppression whirlpool device 2 107
Green compact manufacture is completed, and green compact are conserved into 24h at a temperature of 30 DEG C；
(3) toast and cool down, be divided into the next stage：It is incubated after being warming up to 180 DEG C from 30 DEG C of programming rates with 25 DEG C/h
8h；10h is incubated after being warming up to 320 DEG C with the programming rate of 25 DEG C/h again；After being warming up to 575 DEG C with the programming rate of 25 DEG C/h again
Insulation 12h；Last natural cooling 30h, suppression whirlpool device 2 107 is manufactured and completed.The suppression whirlpool prepared using above-mentioned raw materials and method is filled
2 107 are put, its heat resistance and intensity can adapt to the working environment in IF steel tundish.
Embodiment 6
With reference to Fig. 6, the IF steel tundish of the present embodiment is provided with two pairs of dams 101, every a pair of gears in tundish body 1
The symmetrical line on tundish body 1 of slag dam 101 is symmetrical arranged；Middle water containing opening 104 is located at tundish body bottom portion
103, adjacent dam 101 surrounds the region separated with middle water containing opening 104, and adjacent pushing off the slag in tundish body 1
The bottom that dam 101 surrounds region is connected with middle water containing opening 104.Specifically, all adjacent dams 101 surround region
Bottom is equipped with pad level 102, and pod apertures 105 are provided with the pad level 102, and adjacent dam 101 is surrounded area by pod apertures 105
The bottom in domain is connected with middle water containing opening 104.Pod apertures 105 are " L " the shape through hole for including vertical section and horizontal segment, and this is led
The vertical section of discharge orifice 105 surrounds the bottom connection in region with adjacent dam 101, and the horizontal segment of pod apertures 105 is close to tundish body
Bottom 103 is set, and the horizontal segment of pod apertures 105 is connected with middle water containing opening 104；The company of the vertical section of pod apertures 105 and horizontal segment
Place is met for circular sliding slopes.Specifically, middle water containing opening 104 has two, and two middle water containing openings 104 are located at two pairs of pushing off the slag respectively
The both sides on dam 101.It is highly smaller for a pair of the dams 101 nearer with the symmetrical linear distance of tundish body 1.In
Between the symmetrical line of bag body 1 a pair of dams 101, the bottom that it surrounds region is by symmetrical along tundish body 1
Two groups of symmetrical pod apertures 105 of line are corresponding with the middle water containing opening 104 of both sides respectively to be connected, and other adjacent dams 101 enclose
Bottom into region is connected by one group of pod apertures 105 with the middle water containing opening 104 of respective side respectively, wherein, every group of water conservancy diversion
Hole 105 is on correspondence 104 symmetrically arranged two pod apertures 105 of middle water containing opening.Also include suppression whirlpool device 1, water conservancy diversion
The interface of the bottom that the vertical section of hole 105 surrounds region with adjacent dam 101 is respectively provided on two sides with a suppression whirlpool device one
106, where suppression whirlpool device 1 is " umbrella " the shape structure for including vertical section and vertical section top umbrella cover portion, and above-mentioned vertical section
Straight line is 120 ° with the angle in umbrella cover portion.
In the present embodiment, two pairs of dams 101 are provided with tundish body 1, every a pair of dams 101 are on tundish
The symmetrical line of body 1 is symmetrical arranged, and two pairs of dams 101 surround three with middle water containing opening 104 in tundish body 1
The region separated, wherein, near a pair of dams 101 of the symmetrical line of tundish body 1, it is highly less than another
To dam 101 (height of each pair dam 101 sets inconsistent, is conducive to carrying out layered buffer to molten steel)；Height is smaller
Its bottom that surrounds region of a pair of dams 101, by symmetrical two groups of pod apertures 105 respectively with the tundish of both sides
The correspondence of the mouth of a river 104 is connected, other adjacent dams 101 surround the bottom in region respectively by one group of pod apertures 105 with it is corresponding
The middle water containing opening 104 of side is connected.The setting of above-mentioned two pairs of dams 101, can be carried out to the molten steel for entering into tundish
Layered buffer, improves resistance to erosion, erosion-resisting characteristics of the dam 101 to high-temperature molten steel, and molten steel initially enters highly less
In the region that a pair of dams 101 are surrounded, wherein by this pair of effect of dam 101, molten steel is upward by tundish bottom
Portion moves, and the field trash in molten steel can upwards move floating upward quickly, make molten steel pure；Then molten steel symmetrically enters other
In the region that two adjacent dams 101 are surrounded, the effect of dam 101 is again passed by, molten steel moves drive field trash upwards
Float, improve the nowed forming of molten steel in tundish, extend the time that molten steel reaches middle water containing opening 104, promote folder
Debris float and separate, uniform molten steel composition and temperature.It is emphasized that the pushing off the slag in the present embodiment in tundish body 1
Dam 101 is not limited to two pairs, can set gradually multipair dam 101 according to the form of Fig. 6, promotes inclusion content in melting steel to float and divides
From the content of field trash in reduction strand.Wherein, every group of pod apertures 105 are symmetrically arranged on correspondence middle water containing opening 104
Two pod apertures 105, two pod apertures 105 are symmetrically disposed in the both sides of same middle water containing opening 104, so that steel
Water energy enough symmetrically flows into same middle water containing opening 104, symmetrically arranged pod apertures 105 by two pod apertures 105 respectively
Can eliminate and the deficiency that single pod apertures 105 are easily formed about bottom vortex in middle water containing opening 104 is set, can be prevented effectively from
Slag.
Embodiment 7
With reference to Fig. 7, the IF steel tundish of the present embodiment, its structure is substantially the same manner as Example 3, and its difference is：
Pod apertures 105 are not " L " shape through hole, but stepped throughhole, and dam 101 is surrounded the stepped throughhole bottom in region
It is connected with middle water containing opening 104, because pod apertures 105 are stepped throughhole, the resistance of molten steel flowing in pod apertures 105 increases
Plus, flowing speed reduce, on the one hand advantageously reduce to molten steel from pod apertures 105 outflow after to the region of middle water containing opening 104
The impact of molten steel, it is to avoid the liquid level slag blanket in the region of middle water containing opening 104 is rolled into inside molten steel；On the other hand water conservancy diversion is reduced
Hole 105 and dam 101 surround region between pressure differential, reduce above-mentioned interface formed turbulent flow and vortex violent journey
Degree.
Embodiment 8
With reference to Fig. 8, the manufacture method of the IF steel tundish according to embodiment 2 is comprised the following steps：
(1) three-dimensional modeling：The 3-D geometric model of pod apertures 105 is drawn using 3 d modeling software；
(2) 3D printing：The 3-D geometric model of pod apertures 105 is input into 3D printer, 3D printing goes out the curved of ABS materials
Pipe, the bend pipe matches with the physical dimension of pod apertures 105；
(3) bend pipe is installed：During IF steel tundish is built by laying, above-mentioned bend pipe is imbedded in pad level 102；
(4) dam is installed：Dam 101 is attached in tundish body 1；
(5) water conservancy diversion hole forming：IF steel tundish is toasted, the bend pipe heated combustion of ABS materials disappears in baking process
Lose, it is pollution-free to molten steel, the satisfactory pod apertures 105 of physical dimension are only formed in pad level 102.
Because the structure of pod apertures 105 is special, using traditional handicraft it is difficult to ensure that the dimensional accuracy of pod apertures 105, and then
The using effect of IF steel tundish is influenceed, and by above-mentioned manufacture method, the size essence of pod apertures 105 can be accurately controlled
Degree, so that it is guaranteed that the IF steel tundish of the present embodiment manufacture is effectively used.
Embodiment 9
With reference to Fig. 9, the application method of the IF steel tundish according to embodiment 2 is comprised the following steps：
(1) molten steel injection：When continuous casting is normally produced, IF steel molten steel is injected into dam 101 in tundish body 1 and is surrounded
Region, IF steel molten steel is collected in the region that dam 101 is surrounded；Wherein, in the present embodiment, IF steel molten steel includes following
The element of mass percent：0.002%C, 0.025%Si, 0.18%Mn, 0.003%P, 0.003%S, 0.0017%N；
(2) lasting cast：With the lasting injection of IF steel molten steel, the liquid level of IF steel molten steel is more than gear in tundish body 1
The height of slag dam 101, IF steel molten steel flows out from middle water containing opening 104；
(3) latter stage is poured into a mould：Stop the injection of IF steel molten steel, the liquid level of IF steel molten steel is gradually reduced in tundish body 1, when
When the liquid level of IF steel molten steel is less than the height of dam 101 in tundish body 1, remained in the region that dam 101 is surrounded
IF steel molten steel is flowed out by pod apertures 105；
(4) casting complete：When the IF steel molten steel liquid levels remained in the region that dam 101 is surrounded drop to certain altitude
When, middle water containing opening 104 is blocked, casting complete；Wherein, field trash equivalent diameter is less than 100 μm in strand after continuous casting.
Embodiment 10
The IF steel tundish of the present embodiment, its structure is substantially the same manner as Example 3, and its difference is：
It is emphasized that in the IF steel tundish of the present embodiment, pod apertures 105 are not the situations for two, specifically originally
In embodiment, pod apertures 105 are two groups, and two groups of pod apertures 105 dam 101 is surrounded respectively the bottom in region with two in
Between water-coating port 104 correspondence be connected.Wherein, every group of pod apertures 105 are on the correspondence symmetrically arranged even number of middle water containing opening 104
Individual pod apertures 105, with embodiment 2 similarly, being symmetrical arranged for every group of pod apertures 105 enables to molten steel symmetrically to flow into correspondence
Same middle water containing opening 104, the single pod apertures 105 of setting can be eliminated and be easily formed about bottom whirlpool in middle water containing opening 104
The deficiency of stream, can be prevented effectively from slag.
Embodiment 11
The IF steel tundish of the present embodiment, its structure is substantially the same manner as Example 5, and its difference is：
Suppression whirlpool device 2 107 is made up of the refractory material of following mass percent：0.5%SiC, 0.7%BN, 91.3%
CaO, 4.0%MnO, 0.9%Al2O3, 1.1%SiO2, 1.5%ZrO2；Wherein, the manufacture method of suppression whirlpool device 2 107 is as follows：
(1) by after above-mentioned refractory material dispensing, add dry-mixed 5 minutes in batch mixer, be subsequently adding and account for refractory material gross weight
The water of amount 6.9%, wet mixing 10 minutes；
(2) the good material of wet mixing is put into loose tool, vibrating head vibration moulding is used in charging, suppression whirlpool device 2 107
Green compact manufacture is completed, and green compact are conserved into 30h at a temperature of 5 DEG C；
(3) toast and cool down, be divided into the next stage：It is incubated after being warming up to 150 DEG C from 5 DEG C of programming rates with 30 DEG C/h
9h；12h is incubated after being warming up to 300 DEG C with the programming rate of 30 DEG C/h again；After being warming up to 550 DEG C with the programming rate of 30 DEG C/h again
Insulation 15h；Last natural cooling 35h, suppression whirlpool device 2 107 is manufactured and completed.
Embodiment 12
The application method of the IF steel tundish of the present embodiment, its basic step is same as Example 9, and its difference exists
In：In the present embodiment, IF steel molten steel includes the element of following mass percent：0.001%C, 0.013%Si, 0.15%Mn,
0.005%P, 0.005%S, 0.0035%N.
Schematical above that the present invention and embodiments thereof are described, the description does not have restricted, institute in accompanying drawing
What is shown 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 where the invention objective is not departed from, is designed and the technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (9)
1. a kind of application method of IF steel tundish, it is characterised in that comprise the following steps：
(1) molten steel injection：When continuous casting is normally produced, IF steel molten steel is injected into tundish body (1) interior dam (101) and is surrounded
Region, IF steel molten steel is collected in the region that dam (101) is surrounded；Wherein, the IF steel molten steel includes following quality
The element of percentage：0.001~0.003%C, 0.011~0.025%Si, 0.11~0.19%Mn, 0.003~0.006%P,
0.003~0.007%S, 0.0015~0.0040%N；
(2) lasting cast：With the lasting injection of IF steel molten steel, the liquid level of the interior IF steel molten steel of tundish body (101) is more than gear
The height of slag dam (101), IF steel molten steel flows out from middle water containing opening 104；
(3) latter stage is poured into a mould：Stop the injection of IF steel molten steel, the liquid level of the interior IF steel molten steel of tundish body (1) is gradually reduced, central
Between the interior IF steel molten steel of bag body (1) liquid level less than dam (101) height when, it is residual in the region that dam (101) is surrounded
The IF steel molten steel for staying is flowed out by pod apertures (105)；
(4) casting complete：When the IF steel molten steel liquid levels remained in the region that dam (101) is surrounded drop to certain altitude,
Middle water containing opening (104) is blocked, casting complete；Wherein, field trash equivalent diameter is less than 100 μm in strand after continuous casting.
2. the application method of IF steel tundish according to claim 1, it is characterised in that：During the IF steel tundish includes
Between bag body (1), is provided with middle water containing opening (104) and dam (101), the middle water containing opening in the tundish body (1)
(104) positioned at tundish body bottom portion (103), the dam (101) surrounds and middle water containing opening in tundish body (1)
(104) region separated, and dam (101) surrounds the bottom in region and is connected with middle water containing opening (104).
3. the application method of IF steel tundish according to claim 1 and 2, it is characterised in that：Dam (101) surrounds area
The bottom in domain is provided with pad level (102), is provided with pod apertures (105) in the pad level (102), and the pod apertures (105) are by pushing off the slag
The bottom that dam (101) surrounds region is connected with middle water containing opening (104).
4. the application method of IF steel tundish according to claim 3, it is characterised in that：The pod apertures (105) are bag
" L " shape through hole of vertical section and horizontal segment is included, the bottom that pod apertures (105) vertical section surrounds region with dam (101) connects
Logical, pod apertures (105) horizontal segment is set close to tundish body bottom portion (103), and pod apertures (105) horizontal segment and tundish water
Mouth (104) connection；Pod apertures (105) vertical section is circular sliding slopes with the junction of horizontal segment.
5. the application method of IF steel tundish according to claim 4, it is characterised in that：The pod apertures (105) have two
Group, two groups of pod apertures (105) are symmetrical arranged on same middle water containing opening (104), and every group of pod apertures (105) at least includes one
Individual pod apertures (105).
6. the application method of IF steel tundish according to claim 3, it is characterised in that：The middle water containing opening (104)
There are two, and two middle water containing openings (104) are located at the both sides that dam (101) surrounds region respectively；The pod apertures (105)
Have two groups, and two groups of pod apertures (105) dam (101) is surrounded respectively region bottom and two middle water containing openings (104)
Correspondence is connected, and every group of pod apertures (105) at least includes a pod apertures (105).
7. the application method of IF steel tundish according to claim 4, it is characterised in that：Also include suppression whirlpool device one
(106), the interface of the bottom that pod apertures (105) vertical section surrounds region with dam (101) is respectively provided on two sides with a suppression
Whirlpool device one (106), the suppression whirlpool device one (106) is " umbrella " the shape structure for including vertical section and vertical section top umbrella cover portion,
And straight line where the vertical section and the angle in umbrella cover portion are 120 °~180 °.
8. the application method of IF steel tundish according to claim 4, it is characterised in that：Also include suppression whirlpool device two
(107), the suppression whirlpool device two (107) is rectangular block, and suppression whirlpool device two (107) is positioned at pod apertures (105) vertical section and pushing off the slag
Dam (101) surrounds the interface side of the bottom in region, and presses down one end and dam (101) medial surface of whirlpool device two (107)
Contact, the other end of suppression whirlpool device two (107) does not cover the interface；
Suppression whirlpool device two (107) is made up of the refractory material of following mass percent：0.1~6.6%SiC, 0.1~4.5%BN,
85~92%CaO, 3.5~7.3%MnO, 0.1~1.9%Al2O3, 0.1~5.3%SiO2, 1.4~5.6%ZrO2；Wherein,
The manufacture method of suppression whirlpool device two (107) is as follows：
(1) by after above-mentioned refractory material dispensing, add dry-mixed 5~10 minutes in batch mixer, be subsequently adding and account for refractory material gross weight
The water of amount 6.9~7.5%, wet mixing 10~15 minutes；
(2) the good material of wet mixing is put into loose tool, vibrating head vibration moulding, the life of suppression whirlpool device two (107) is used in charging
Base manufacture is completed, and green compact are conserved into 24~30h at a temperature of 5~30 DEG C；
(3) toast and cool down, be divided into the next stage：150~180 are warming up to from 5~30 DEG C of programming rates with 25~30 DEG C/h
8~9h is incubated after DEG C；10~12h is incubated after being warming up to 300~320 DEG C with the programming rate of 25~30 DEG C/h again；Again with 25~
The programming rate of 30 DEG C/h is incubated 12~15h after being warming up to 550~575 DEG C；30~35h of last natural cooling, suppression whirlpool device two
(107) manufacture is completed.
9. the application method of the IF steel tundish according to claim 3-8 any one, it is characterised in that：Dam
(101) at least three regions separated with middle water containing opening (104), and each pushing off the slag are surrounded in tundish body (1)
The bottom in the region that dam (101) is surrounded is connected by pod apertures (105) with middle water containing opening (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078033.3A CN106735143B (en) | 2016-03-28 | 2016-03-28 | A kind of application method of IF steel tundish |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611078033.3A CN106735143B (en) | 2016-03-28 | 2016-03-28 | A kind of application method of IF steel tundish |
| CN201610189326.2A CN105750534B (en) | 2016-03-28 | 2016-03-28 | A kind of IF steel tundish |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610189326.2A Division CN105750534B (en) | 2016-03-28 | 2016-03-28 | A kind of IF steel tundish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106735143A true CN106735143A (en) | 2017-05-31 |
| CN106735143B CN106735143B (en) | 2017-12-12 |
Family
ID=56345820
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610189326.2A Active CN105750534B (en) | 2016-03-28 | 2016-03-28 | A kind of IF steel tundish |
| CN201611078235.8A Active CN106552931B (en) | 2016-03-28 | 2016-03-28 | A kind of manufacture method of IF steel tundish |
| CN201611078033.3A Active CN106735143B (en) | 2016-03-28 | 2016-03-28 | A kind of application method of IF steel tundish |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610189326.2A Active CN105750534B (en) | 2016-03-28 | 2016-03-28 | A kind of IF steel tundish |
| CN201611078235.8A Active CN106552931B (en) | 2016-03-28 | 2016-03-28 | A kind of manufacture method of IF steel tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN105750534B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026533A (en) * | 2019-05-30 | 2019-07-19 | 东北大学 | A kind of basket pouring molten steel recyclable device and method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983942B (en) * | 2018-01-03 | 2020-02-18 | 北京科技大学 | Long nozzle and method for improving molten steel flow under double-flow tundish single-flow pouring condition |
| CN112692270B (en) * | 2020-11-25 | 2022-06-10 | 鞍钢集团北京研究院有限公司 | Tundish device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178488A (en) * | 1995-01-26 | 1998-04-08 | 福塞科国际有限公司 | Tundish |
| JP2003245757A (en) * | 2002-02-26 | 2003-09-02 | Jfe Steel Kk | Tundish |
| CN2657824Y (en) * | 2003-11-11 | 2004-11-24 | 谢玉红 | Continuous casting tundish with flow guiding device |
| JP2005000957A (en) * | 2003-06-12 | 2005-01-06 | Kurosaki Harima Corp | Method for removing inclusion in tundish, and weir used therefor |
| JP2007118082A (en) * | 2005-09-30 | 2007-05-17 | Toyo Sogo Gijutsu Kenkyu Center:Kk | Liquid vessel and method for ejecting liquid using liquid vessel thereof |
| CN101880827A (en) * | 2010-07-09 | 2010-11-10 | 武汉钢铁(集团)公司 | IF steel with delta r less than or equal to 0.3 and production method thereof |
| CN202317001U (en) * | 2011-11-21 | 2012-07-11 | 安阳钢铁股份有限公司 | Slab continuous casting tundish for reducing residual slag pouring |
| CN203484651U (en) * | 2013-09-27 | 2014-03-19 | 宝山钢铁股份有限公司 | Continuous casting steel liquid ladle low in vortex and high in molten steel yield |
| CN203725753U (en) * | 2014-02-25 | 2014-07-23 | 浙江自立股份有限公司 | Steelmaking ladle structure |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834938A (en) * | 1988-04-25 | 1989-05-30 | The Dow Chemical Company | Method for making composite articles that include complex internal geometry |
| GB9517633D0 (en) * | 1995-08-30 | 1995-11-01 | Foseco Int | Tundish impact pad |
| JP2000301297A (en) * | 1999-04-20 | 2000-10-31 | Akechi Ceramics Co Ltd | Tundish |
| CN101758176B (en) * | 2010-01-21 | 2012-03-21 | 山西太钢不锈钢股份有限公司 | Double-layer tundish covering agent |
| CN101844223B (en) * | 2010-06-22 | 2011-10-12 | 重庆大学 | Structure for preventing continuous casting tundish from producing rotational flows |
| CN201807729U (en) * | 2010-09-26 | 2011-04-27 | 舞阳钢铁有限责任公司 | Continuous casting tundish for reducing steel remaining quantity |
| JP5867531B2 (en) * | 2013-03-22 | 2016-02-24 | Ｊｆｅスチール株式会社 | Manufacturing method of high cleanliness steel slab by continuous casting |
| CN104928573B (en) * | 2015-07-02 | 2017-03-01 | 首钢总公司 | The control method of gap-free atom steel cleanness |
-
2016
- 2016-03-28 CN CN201610189326.2A patent/CN105750534B/en active Active
- 2016-03-28 CN CN201611078235.8A patent/CN106552931B/en active Active
- 2016-03-28 CN CN201611078033.3A patent/CN106735143B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178488A (en) * | 1995-01-26 | 1998-04-08 | 福塞科国际有限公司 | Tundish |
| JP2003245757A (en) * | 2002-02-26 | 2003-09-02 | Jfe Steel Kk | Tundish |
| JP2005000957A (en) * | 2003-06-12 | 2005-01-06 | Kurosaki Harima Corp | Method for removing inclusion in tundish, and weir used therefor |
| CN2657824Y (en) * | 2003-11-11 | 2004-11-24 | 谢玉红 | Continuous casting tundish with flow guiding device |
| JP2007118082A (en) * | 2005-09-30 | 2007-05-17 | Toyo Sogo Gijutsu Kenkyu Center:Kk | Liquid vessel and method for ejecting liquid using liquid vessel thereof |
| CN101880827A (en) * | 2010-07-09 | 2010-11-10 | 武汉钢铁(集团)公司 | IF steel with delta r less than or equal to 0.3 and production method thereof |
| CN202317001U (en) * | 2011-11-21 | 2012-07-11 | 安阳钢铁股份有限公司 | Slab continuous casting tundish for reducing residual slag pouring |
| CN203484651U (en) * | 2013-09-27 | 2014-03-19 | 宝山钢铁股份有限公司 | Continuous casting steel liquid ladle low in vortex and high in molten steel yield |
| CN203725753U (en) * | 2014-02-25 | 2014-07-23 | 浙江自立股份有限公司 | Steelmaking ladle structure |
Non-Patent Citations (1)
| Title |
|---|
| 苑品 等: "高品质IF钢连铸中间包降低残钢量的水模型研究", 《北京科技大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026533A (en) * | 2019-05-30 | 2019-07-19 | 东北大学 | A kind of basket pouring molten steel recyclable device and method |
| CN110026533B (en) * | 2019-05-30 | 2020-09-01 | 东北大学 | Tundish pouring molten steel recovery device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106552931A (en) | 2017-04-05 |
| CN106735143B (en) | 2017-12-12 |
| CN106552931B (en) | 2017-10-24 |
| CN105750534A (en) | 2016-07-13 |
| CN105750534B (en) | 2016-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206622605U (en) | A kind of three machines three stream slab CC tundish | |
| CN202845761U (en) | Novel tundish for highly purified liquid steel | |
| CN106735143B (en) | A kind of application method of IF steel tundish | |
| CN208528079U (en) | A kind of continuous casting production dam | |
| CN101844223B (en) | Structure for preventing continuous casting tundish from producing rotational flows | |
| CN205437122U (en) | Reduce middle package of IF steel of casting blank inclusion | |
| CN206779440U (en) | Resistant to corrosion ladle | |
| CN202963405U (en) | Liquid aluminum casting filter device | |
| CN205496555U (en) | Package in middle of IF steel | |
| CN103170609A (en) | Ferroalloy casting modeling device and ferroalloy casting modeling process in front of furnace | |
| CN201058370Y (en) | Low pressure casting rising liquid pipe | |
| CN201140273Y (en) | Multifunctional integral flow straightener for pouring box | |
| CN2657824Y (en) | Continuous casting tundish with flow guiding device | |
| JP4725244B2 (en) | Ladle for continuous casting and method for producing slab | |
| CN215902714U (en) | Long-life tundish slag retaining wall with pre-embedded reinforcing ribs | |
| CN104999044B (en) | A kind of continuous cast mold constant-current stabilizer | |
| CN108637235A (en) | Ladle draining method | |
| CN104511581B (en) | A kind of cold rolling tin plate molten steel flux | |
| CN206677173U (en) | Rare earth steel and the mouth of a river used for aluminum-containing steel and middle steel ladle | |
| CN203695934U (en) | Molten iron jar slag stopper with molten iron flowing opening | |
| CN208276168U (en) | Ladle draining presses down whirlpool device | |
| CN202963436U (en) | Double-vacuum cast steel ingot middle ladle | |
| CN112108642A (en) | Steel ladle and method for preventing slag entrapment of molten steel | |
| CN114101651A (en) | Ladle drainage sand casting pipe, framework device and using method thereof | |
| CN2333464Y (en) | Continuous casting pouring basket turbulence-proof portition |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |