CN102632209A - Tundish - Google Patents
Tundish Download PDFInfo
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- CN102632209A CN102632209A CN2012101276081A CN201210127608A CN102632209A CN 102632209 A CN102632209 A CN 102632209A CN 2012101276081 A CN2012101276081 A CN 2012101276081A CN 201210127608 A CN201210127608 A CN 201210127608A CN 102632209 A CN102632209 A CN 102632209A
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- tundish
- layer
- molten steel
- inclusion
- storage chamber
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Abstract
The invention discloses a tundish comprising a tundish body, wherein a permanent layer is located at the outside of the tundish body, a working layer is located in the tundish body, an insulation layer is arranged between the permanent layer and the working layer, a ventilating cover shell is arranged above the working layer on the bottom part of the tundish body, the ventilating cover shell is of an inverted trapezoidal structure without hemline and is integrally connected with the bottom part of the tundish body, an air storage chamber is formed in the internal space of the ventilating cover shell, and an air conveying pipe passes through the bottom part of the tundish body to stretch into the air storage chamber. According to the invention, the air storage chamber is arranged on the working layer on the bottom part of the tundish body, and air is uniformly filled in molten steel the tundish through the ventilating cover shell, so that the floating speed of the impurities in the molten steel is increased, the the working efficiency of the tundish is improved and the purity of the molten steel is effectively improved.
Description
Technical field
The present invention relates to the experienced steel refractory material container of field of steel-making, relate in particular to a kind of tundish.
Background technology
Along with the quality requirement to steel improves day by day, developed various ladle refining technology, its purpose improves degree of purity exactly, and is a little purification of molten steel " totally ", and tundish is a refractory material container between continuous casting ladle and crystallizer.Molten steel through external refining can be described as " totally ", possibly pollute again but water tundish, therefore again; Should not regard tundish as simple molten steel transition container, be a continuous metallurgical reaction and should regard it as, and the measure of adopting in the ladle refining can be transplanted to tundish; With further cleaning molten steel, the notion of tundish metallurgy has been proposed for this reason, received people's attention; The function of tundish metallurgy is: (1) purification function: for producing the steel of high cleanliness; Adopt barricade to add measures such as dam, Argon, ceramic filter at tundish, can reduce nonmetallic inclusionsin steel content significantly, and on producing, obtained obvious effects; (2) temperature adjustment function: for making in the casting process before, during and after the tundish phase molten steel temperature difference less than 5 ℃; Pour into a mould near liquidus temperature; Enlarge strand equiax crystal district, reduce center segregation, can take to add measures such as small-sized scrap, winding-up iron powder to regulate liquid steel temperature to tundish; (3) trimming: feed core-spun yarns such as aluminium, titanium, boron to crystallizer by tundish stopper rod centre bore, realize the fine setting of microalloy composition in the steel, both improved the recovery rate of easy oxidation element, can avoid nozzle blocking again; (4) refining function: add double-deck slag at the tundish molten steel surface and absorb the field trash that floats in the steel; (5) heating function: adopt measures such as eddy-current heating and plasma heating at tundish, accurately control the pouring molten steel temperature at ± 3～± 5 ℃.
Along with the continuous development of steel-smelting technology, continuous casting technology is also increasingly mature at present, and the flow velocity of molten steel in tundish is more and more faster; The time of staying also shortens thereupon, causes the interior impurity come-up of molten steel insufficient, and the degree of purity of molten steel is affected; Existing tundish generally includes only inclusion, and the inclusion outside is a permanent layer, and inside is working lining; Standingly in the inclusion be equipped with barricade and change MOLTEN STEEL FLOW speed, improve the ascent rate of impurity, thereby obtain comparatively pure molten steel; But along with reaching its maturity of high efficiency continuous casting, existing barricade can not satisfy the demands, and haves much room for improvement.
Summary of the invention
The present invention is directed to the deficiency of prior art, provide a kind of purify hot metal effective, the tundish that cost is low.
The present invention provides following technical scheme for solving the problems of the technologies described above: a kind of tundish comprises inclusion; The inclusion outside is a permanent layer, and inner working lining is characterized in that being provided with in addition between permanent layer and working lining heat-insulation layer; The working lining top of inclusion bottom is provided with ventilative case; Described ventilative case links into an integrated entity for the inverted trapezoidal structure and the inclusion bottom on no base, and ventilative case inner space forms an air storage chamber, and an appendix passes the inclusion bottom and stretches in the air storage chamber.
As of the present invention preferred, heat-insulation layer is yellow sand layer or yellow mud layer.Both alleviate the weight of tundish through this kind setting, reduced the thickness of working lining again, reduced cost, played good function of heat insulation simultaneously.
Be better to explain technical scheme of the present invention, below introduce operation principle of the present invention in detail: tundish is squeezed into air through air pump or air blast in appendix after injecting molten steel; Air gets into air storage chamber; Uniformly to the inner gas distribution of molten steel, trickle bubble effectively adsorbs pernicious gases such as N, H, O in the molten steel through ventilative case, and bubble floating effectively stirs molten steel and forms ascending eddy simultaneously; Impel the impurity come-up in the molten steel, effectively purify hot metal.
The present invention through the evenly molten steel gas distribution in tundish of case of breathing freely, accelerates impurity ascent rate in the molten steel through on the working lining of inclusion bottom, air storage chamber being set, and improves the tundish operating efficiency, effectively improves the degree of purity of molten steel.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the vertical view of ventilative case.
Fig. 3 is the A-A cutaway view of Fig. 2.
The specific embodiment
A kind of tundish comprises inclusion 1, and inclusion 1 outside is a permanent layer 2; Inner working lining 3,3 of permanent layer 1 and working linings are provided with heat-insulation layer 4 in addition, and working lining 3 tops of inclusion 1 bottom are provided with ventilative case 5; Described ventilative case 5 links into an integrated entity for the inverted trapezoidal structure on no base and inclusion 1 bottom; Ventilative case 5 inner spaces form an air storage chamber 6, one appendixs 7 and pass inclusion 1 bottom and stretch in the air storage chamber 6, and heat-insulation layer 4 is yellow sand layer or yellow mud layer.
Claims (2)
1. a tundish comprises inclusion, and the inclusion outside is a permanent layer; Inner working lining; It is characterized in that being provided with in addition between permanent layer and working lining heat-insulation layer, the working lining top of inclusion bottom is provided with ventilative case, and described ventilative case links into an integrated entity for the inverted trapezoidal structure and the inclusion bottom on no base; Ventilative case inner space forms an air storage chamber, and an appendix passes the inclusion bottom and stretches in the air storage chamber.
2. a kind of tundish according to claim 1 is characterized in that heat-insulation layer is yellow sand layer or yellow mud layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101276081A CN102632209A (en) | 2012-04-27 | 2012-04-27 | Tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101276081A CN102632209A (en) | 2012-04-27 | 2012-04-27 | Tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102632209A true CN102632209A (en) | 2012-08-15 |
Family
ID=46616890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101276081A Pending CN102632209A (en) | 2012-04-27 | 2012-04-27 | Tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102632209A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566553U (en) * | 1980-06-05 | 1981-01-21 | ||
| JPS6133744A (en) * | 1984-07-25 | 1986-02-17 | Kobe Steel Ltd | Lining construction for tundish |
| JPH01127155A (en) * | 1987-11-12 | 1989-05-19 | Nkk Corp | Molten metal container |
| CN201186337Y (en) * | 2008-03-14 | 2009-01-28 | 濮阳濮耐高温材料（集团）股份有限公司 | Tundish gas curtain and pouring box with the gas curtain |
| CN101602104A (en) * | 2009-04-17 | 2009-12-16 | 陈红良 | A kind of tundish and use this tundish to remove the method for nonmetal impurities |
| CN201644776U (en) * | 2010-04-06 | 2010-11-24 | 武汉科技大学 | Steel ladle lining based on gradient heat insulation |
| CN202621862U (en) * | 2012-04-27 | 2012-12-26 | 宜兴市龙宸炉料有限公司 | Tundish |
-
2012
- 2012-04-27 CN CN2012101276081A patent/CN102632209A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566553U (en) * | 1980-06-05 | 1981-01-21 | ||
| JPS6133744A (en) * | 1984-07-25 | 1986-02-17 | Kobe Steel Ltd | Lining construction for tundish |
| JPH01127155A (en) * | 1987-11-12 | 1989-05-19 | Nkk Corp | Molten metal container |
| CN201186337Y (en) * | 2008-03-14 | 2009-01-28 | 濮阳濮耐高温材料（集团）股份有限公司 | Tundish gas curtain and pouring box with the gas curtain |
| CN101602104A (en) * | 2009-04-17 | 2009-12-16 | 陈红良 | A kind of tundish and use this tundish to remove the method for nonmetal impurities |
| CN201644776U (en) * | 2010-04-06 | 2010-11-24 | 武汉科技大学 | Steel ladle lining based on gradient heat insulation |
| CN202621862U (en) * | 2012-04-27 | 2012-12-26 | 宜兴市龙宸炉料有限公司 | Tundish |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120815 |