CN205519630U - Continuous casting immersion nozzle of aluminium carbon material - Google Patents
Continuous casting immersion nozzle of aluminium carbon material Download PDFInfo
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- CN205519630U CN205519630U CN201620083455.9U CN201620083455U CN205519630U CN 205519630 U CN205519630 U CN 205519630U CN 201620083455 U CN201620083455 U CN 201620083455U CN 205519630 U CN205519630 U CN 205519630U
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- mouth
- river
- continuous casting
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- protrusion
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Abstract
The utility model relates to a continuous casting immersion nozzle of aluminium carbon material, the main technical problem who solves the easy dross of current continuous casting immersion nozzle of aluminium carbon material inner chamber wall. The utility model relates to a continuous casting immersion nozzle of aluminium carbon material, including mouth of a river body, be equipped with side tapping hole, characterized by on the lateral wall of mouth of a river body bottom: mouth of a river inner chamber span mouth of a river top part distance is 10 -30% department along the equidistant spherical crown form protrusion that sets up more than 2 of circumferencial direction of mouth of a river total length, and protrusion bottom diameter is the 15 -30% of here mouth of a river inner chamber diameter, and the protrusion height is the 5 -25% of here mouth of a river inner chamber diameter. The utility model discloses the preparation is simple and convenient, and is with low costs, reduces continuous casting immersion nozzle of aluminium carbon material's dross speed, extension mouth of a river life.
Description
Technical field
The utility model relates to a kind of continuous casting immersion outlet, particularly to the continuous casting immersion outlet of a kind of aluminium carbon material, belongs to
Steel-making continuous casting technical field.
Background technology
Continuous casting immersion outlet is the passage that in continuous casting working procedure, molten steel enters crystallizer from middle packet stream, is that its mouth of a river is immersed in crystallization
Under the liquid level of device, carry out the pipeline poured into a mould.The utilization of continuous casting immersion outlet can prevent secondary oxidation of steel in degree very well,
Simultaneously by gate structure reasonable in design, it is possible to prevent molten steel to produce irrational bubble when entering crystallizer, thus ensures steel
The quality of material.
Carry out casting a kind of necessary means being to smelt high-quality steel although with continuous casting immersion outlet, but is casting some
During steel grade, steel grade that especially aluminate content is higher time, the continuous casting leaching of the most widely used aluminium carbon material
Enter the formula mouth of a river.The continuous casting immersion outlet of aluminium carbon material is prepared raw material and is mainly native graphite, plate diamond spar, tabular spinelle.
The continuous casting immersion outlet of aluminium carbon material is very easy to dross, and the quality reducing steel, the direct motion affecting production, increase produce into
This.About the dross mechanism of continuous casting immersion outlet, the researcher wherein having think interfacial tension effect time field trash adsorb at water
Mouthful inwall and form dross；Have thinks that the negative pressure of mouth of a river inwall makes the low melting point of the aluminate in molten steel and inner wall surface
Glass forms compacted zone mutually, and on this basis, aluminate continues attachment formation dross and having at present of being formed is multiple
Explain to prevent nozzle clogging.But, the mechanism for nozzle clogging does not the most still have clear and definite final conclusion.In order to improve water
In the service life of mouth, prevent dross, mainly by selecting suitable immerseable gate material and employing rationally
Two kinds of methods of structure at the mouth of a river.Although both approaches can slow down the nozzle clogging speed of some steel grade, but makes with target
Still suffering from bigger gap with the life-span, the research gesture carry out the dross speed reducing the mouth of a river, extending submersed nozzle service life is must
OK.
In recent years, along with the progress of outer field technology, researcher is had to utilize additional electromagnetic field to change in the mouth of a river flow field of molten steel or outer
Added electric field improves two kinds of methods such as the refractory material wetability with molten steel and has carried out research the most in laboratory conditions.Simultaneously by general
Logical submersed nozzle carries out the research of electric field treatment also in actively research and development as electrode.But common aluminium carbonaceous submersed nozzle
During baking and use, the inwall at the mouth of a river forms decarburized layer or densification is mingled with nitride layer, thus causes can not effectively carrying out electricity
Field processes and can not significantly improve the service life of submersed nozzle.Therefore, exploitation ensure that and in use can continue
The submersed nozzle of electric field treatment is very important.
Chinese Patent Application No. CN 200720068238.3, the continuous casting immersion outlet containing conductive coil discloses immersion water
Mouth preparation method, it exists at submersed nozzle body upper part recessing, the molten steel that realizes installing conduction lasso the most in a groove
The conduction at the mouth of a river in the process of circulation；But it has the disadvantage that 1, owing in mouth of a river body outer wall recessing, destroying the mouth of a river
Overall shock resistance.Current all of aluminium carbonaceous submersed nozzle is required for being baked to uniform temperature and could use online, and makes online
Used time is acted on by high-temperature molten steel, it is desirable to it is high temperature resistant and thermal shock resistance is fine.And this mouth of a river baking and use during by
Big in the coefficient of expansion difference of the conduction expansion be heated of lasso and submersed nozzle body, thus cause this mouth of a river in use
Cracking, the phenomenon of fracture happens occasionally, it is impossible to the steady and continuous meeting current continuous casting production requirement produces.2, in casting process,
Molten steel is not can to contact with mouth of a river inwall at any time in the circulation shape of submersed nozzle, duration meeting under less steel-passing amount
Occurring and the makes discontinuous contact of mouth of a river inwall, under high temperature action, mouth of a river inwall forms decarburized layer thus reduces the electric conductivity at the mouth of a river.3, aluminium
Carbonaceous submersed nozzle in use, all within it can form certain fine and close field trash by wall, and the existence of its field trash also can
Cause its impact on energising performance.
Summary of the invention
The purpose of this utility model is to provide the continuous casting immersion outlet of a kind of aluminium carbon material, mainly solves the company of existing aluminium carbon material
The technical problem of the casting easy dross of submersed nozzle internal chamber wall.
The technical solution adopted in the utility model is: the continuous casting immersion outlet of a kind of aluminium carbon material, including mouth of a river body, the mouth of a river
Body bottom portion sidewall is provided with side tapping hole, it is characterized in that: mouth of a river internal chamber wall is away from the 10-30% that mouth of a river distance from top is mouth of a river total length
Locating the spherical crown shape protrusion of along the circumferential direction spaced set more than 2, protrusion base diameter is mouth of a river intracavity diameter herein
15-30%, protrusion height is the 5-25% of mouth of a river intracavity diameter herein.
Further, the mouth of a river internal chamber wall at the above-mentioned mouth of a river away from side tapping hole distance from top be at the 10-30% of mouth of a river total length circumferentially side
To the spherical crown shape protrusion of spaced set more than 2, protrusion base diameter is the 15-30% of mouth of a river intracavity diameter herein, convex
Playing the 5-25% that thing height is mouth of a river intracavity diameter herein, effect is preferred.
On the internal chamber wall of the utility model mouth of a river, spherical crown shape protrusion material is identical with mouth of a river internal chamber wall material, spherical crown on the internal chamber wall of the mouth of a river
Shape protrusion and mouth of a river internal chamber wall use cold isostatic compaction technology one-body molded, simple for production, low cost.
The utility model, by the spherical crown shape protrusion arranged at mouth of a river internal chamber wall, utilizes the souring of molten steel to make submersed nozzle
In graphite can be with molten steel continuous contact such that it is able to ensure that molten steel is continuously connected with external power source, thus reduce mouth of a river inner chamber
Form decarburized layer on wall and densification is mingled with the nitride layer impact on electric field treatment, reduce the dross of the continuous casting immersion outlet of aluminium carbon material
Speed, extends mouth of a river service life.
The utility model has following good effect compared to existing technology: 1, the utility model is by the ball arranged at mouth of a river internal chamber wall
Crown protrusion, makes mouth of a river internal chamber wall and molten steel keep good contact, it is ensured that the lasting conductive capability at the mouth of a river, reduces aluminium carbon
The dross speed of the continuous casting immersion outlet of material, extends mouth of a river service life.2, spherical crown shape on the internal chamber wall of the utility model mouth of a river
Protrusion is identical with the material of mouth of a river internal chamber wall, uses cold isostatic compaction technology one-body molded, simple for production, and low cost is kept away
Exempt from high-temperature baking and used the inconsistent mouth of a river CRACKING ACCIDENT caused of the thermal expansion in state procedure to occur, having improve the mouth of a river and use
Life-span.
Accompanying drawing explanation
Accompanying drawing is the utility model structure axial cross-sectional views.
Description of symbols in figure: 1-upper lobes thing；2-lower lobes thing；3-side tapping hole；4-mouth of a river body.
Detailed description of the invention
Embodiment 1, referring to the drawings, the continuous casting immersion outlet of a kind of aluminium carbon material, including mouth of a river body 4, mouth of a river body 4 end
Portion's sidewall is provided with side tapping hole 3, and mouth of a river total length is 820mm, and mouth of a river inner chamber upper inner diameter is 75mm, inner chamber bottom, the mouth of a river
Internal diameter is 70mm, and mouth of a river internal chamber wall is that at 80mm, along the circumferential direction 4 spherical crown shapes of spaced set are protruding away from mouth of a river distance from top
Thing 1, protrusion 1 base diameter is 20mm, and protrusion 1 height is 10mm；Mouth of a river internal chamber wall away from side tapping hole distance from top is
Along the circumferential direction 4 spherical crown shape protrusions 2 of spaced set at 80mm, protrusion 2 base diameter is 20mm, and protrusion 2 is high
Degree is 10mm.
Embodiment 1 mouth of a river, after 800 DEG C are toasted, is applied to the ultra-low-carbon steel casting cycle containing aluminate, is protecting
After under conditions of card sustained electric field process, continuous and stable casts 10 stoves, mouth of a river conduction situation is stable, the slight dross in the mouth of a river, and does not adopts
Serious by dross after common submersed nozzle direct casting 6 stove of energising measure, the mouth of a river improves more than 50% service life.
Embodiment 2, referring to the drawings, the continuous casting immersion outlet of a kind of aluminium carbon material, including mouth of a river body 4, mouth of a river body 4 end
Portion's sidewall is provided with side tapping hole 3, and mouth of a river total length is 850mm, and mouth of a river inner chamber upper inner diameter is 80mm, inner chamber bottom, the mouth of a river
Internal diameter is 76mm, and mouth of a river internal chamber wall is that at 100mm, along the circumferential direction 4 spherical crown shapes of spaced set are protruding away from mouth of a river distance from top
Thing 1, protrusion 1 base diameter is 15mm, and protrusion 1 height is 7mm；Mouth of a river internal chamber wall away from side tapping hole distance from top is
Along the circumferential direction 4 spherical crown shape protrusions 2 of spaced set at 100mm, protrusion 2 base diameter is 15mm, protrusion 2
It is highly 7mm.
Embodiment 2 mouth of a river, after 800 DEG C are toasted, is applied to the ultra-low-carbon steel casting cycle containing aluminate, is ensureing leaching
Entering continuous and stable under conditions of the internal molten steel in the formula mouth of a river and continuous casting platform tundish outer wall good connection and cast after 8 stoves, the mouth of a river is conducted electricity
Situation is stable, the mouth of a river somewhat dross, and after common submersed nozzle direct casting 6 stove being not powered on, dross is serious, and the mouth of a river uses
Life-span improves more than 30%.
Claims (2)
1. a continuous casting immersion outlet for aluminium carbon material, including mouth of a river body, mouth of a river body bottom portion sidewall is provided with side tapping hole, its
Feature is: mouth of a river internal chamber wall at the 10-30% that mouth of a river distance from top is mouth of a river total length along the circumferential direction spaced set 2 with
On spherical crown shape protrusion, protrusion base diameter is the 15-30% of mouth of a river intracavity diameter herein, and protrusion height is the mouth of a river herein
The 5-25% of intracavity diameter.
The continuous casting immersion outlet of a kind of aluminium carbon material the most as claimed in claim 1, is characterized in that, described mouth of a river internal chamber wall goes out away from side
Steel mouth distance from top is the spherical crown shape protrusion of along the circumferential direction spaced set more than 2 at the 10-30% of mouth of a river total length, convex
Playing the 15-30% that thing base diameter is mouth of a river intracavity diameter herein, protrusion height is the 5-25% of mouth of a river intracavity diameter herein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620083455.9U CN205519630U (en) | 2016-01-27 | 2016-01-27 | Continuous casting immersion nozzle of aluminium carbon material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620083455.9U CN205519630U (en) | 2016-01-27 | 2016-01-27 | Continuous casting immersion nozzle of aluminium carbon material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205519630U true CN205519630U (en) | 2016-08-31 |
Family
ID=56772335
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620083455.9U Active CN205519630U (en) | 2016-01-27 | 2016-01-27 | Continuous casting immersion nozzle of aluminium carbon material |
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| CN (1) | CN205519630U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293219A (en) * | 2019-06-28 | 2019-10-01 | 中天钢铁集团有限公司 | A kind of method of large scale calcium-aluminate field trash in reduction steel |
-
2016
- 2016-01-27 CN CN201620083455.9U patent/CN205519630U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293219A (en) * | 2019-06-28 | 2019-10-01 | 中天钢铁集团有限公司 | A kind of method of large scale calcium-aluminate field trash in reduction steel |
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| GR01 | Patent grant |