CN106747511B - Baking-free low-carbon composite anti-blocking tundish nozzle - Google Patents
Baking-free low-carbon composite anti-blocking tundish nozzle Download PDFInfo
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- CN106747511B CN106747511B CN201611159420.XA CN201611159420A CN106747511B CN 106747511 B CN106747511 B CN 106747511B CN 201611159420 A CN201611159420 A CN 201611159420A CN 106747511 B CN106747511 B CN 106747511B
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- layer material
- powder
- corundum
- outer layer
- inner layer
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a non-fired low-carbon composite anti-blocking tundish nozzle, which consists of an inner layer material and an outer layer material; the inner layer material comprises crystalline flake graphite, corundum, magnesium-aluminum spinel powder, light-burned alumina, metal aluminum powder, metal silicon powder, silicon carbide and a binder; the outer layer comprises corundum, fused quartz, soft clay and a binder; the weight percentage of the raw materials used in the inner layer material is 1-10% of crystalline flake graphite, 50-90% of corundum, 1-15% of magnesium-aluminum spinel powder, 0.5-2% of metal aluminum powder, 1-6% of metal silicon powder and 0.4-6% of boron carbide (or silicon carbide); the raw materials used in the outer layer material comprise 50-90% of alumina (or corundum), 3-45% of fused quartz and 1-9% of soft clay by weight percentage; the invention can effectively overcome the electric conduction and heat conduction performance of the flake graphite, avoid the blockage of the water gap, and can avoid burning and low carbon, reduce environmental pollution, reduce cost and prolong the service life because the bonding agent is added in the invention and is easy to solidify or be combined by colloid.
Description
Technical Field
The invention relates to the technical field of continuous casting refractory materials, in particular to a baking-free low-carbon composite anti-blocking tundish nozzle.
Background
The tundish nozzle is applied to a continuous casting tundish, and the tundish nozzle mainly has the function of controlling the casting and closing of the tundish and the steel flow of a crystallizer by adjusting the fit clearance between the tundish nozzle and the integral stopper rod head so as to ensure the stable liquid level of the molten steel in the crystallizer and the stable continuous casting process. The using conditions of the tundish nozzle are very harsh, and the tundish nozzle can bear the baking of high-temperature gas, the strong thermal shock and the severe scouring in the initial steel casting stage and can also bear the erosion of molten steel.
In the tundish nozzle in the prior art, due to the introduction of the scale graphite, the scale graphite has excellent electric conduction and heat conduction performance, so that the temperature of molten steel can be quickly reduced, the viscosity of the molten steel is high, and some elements can be separated out of the molten steel to cause the nozzle to be blocked.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention provides a baking-free low-carbon composite anti-blocking tundish nozzle, which adopts a composite technology, can effectively overcome the electric conduction and heat conduction performance of crystalline flake graphite, avoids the blockage of the nozzle, and can avoid baking because a bonding agent is added in the tundish, thereby reducing the environmental pollution, reducing the cost and prolonging the service life.
In order to achieve the purpose, the invention adopts the technical scheme that: a baking-free low-carbon composite anti-blocking tundish nozzle comprises an inner layer material and an outer layer material; the inner layer material comprises crystalline flake graphite, corundum, magnesium-aluminum spinel powder, light-burned alumina, metal aluminum powder, metal silicon powder, silicon carbide, boron carbide and a binder; the outer layer material comprises alumina (or corundum), fused quartz, soft clay and a binder.
As a further improvement of the invention, the weight percentage of the raw materials used in the inner layer material is 1-10% of crystalline flake graphite, 50-90% of corundum, 1-15% of magnesium-aluminum spinel powder, 0.5-2% of metal aluminum powder, 1-6% of metal silicon powder and 0.4-6% of boron carbide (or silicon carbide).
As a further improvement of the invention, the raw materials used in the outer layer material comprise 50-80% by weight of corundum, 3-45% by weight of fused quartz and 1-9% by weight of soft clay.
The invention has the beneficial effects that: the composite technology can effectively overcome the electric conduction and heat conduction performance of the flake graphite, avoid the blockage of a water gap, and greatly prolong the service life because the bonding agent is added in the composite material and is easy to cure, so that the composite material can be free from burning and low in carbon, reduce environmental pollution and reduce cost, and the formula is optimized.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
A baking-free low-carbon composite anti-blocking tundish nozzle comprises an inner layer material and an outer layer material; the inner layer material comprises crystalline flake graphite, corundum, magnesium-aluminum spinel powder, light-burned alumina, metal aluminum powder, metal silicon powder, boron carbide, silicon carbide and a binder; the outer layer material comprises alumina (or corundum), fused quartz, soft clay and a binder.
The first embodiment is as follows:
the inner layer material comprises, by weight, 1-7% of crystalline flake graphite, 50-90% of corundum, 1-15% of magnesium-aluminum spinel powder, 0.5-2% of metal aluminum powder, 1-6% of metal silicon powder and 0.4-6% of boron carbide (or silicon carbide).
The outer layer material comprises, by weight, 50-90% of alumina (or corundum), 3-45% of fused quartz, 1-5% of soft clay and 4% of feldspar powder.
Example two:
the inner layer material comprises 1% of crystalline flake graphite, 50% of corundum, 2% of magnesium-aluminum spinel powder, 0.5% of metal aluminum powder, 1% of metal silicon powder and 1% of silicon carbide in percentage by weight.
The raw materials used in the outer layer material comprise 50% of alumina, 5% of fused quartz, 1% of soft clay and 4% of feldspar powder by weight percentage.
Example three:
the inner layer material comprises 7% of flake graphite, 75% of corundum, 15% of magnesium-aluminum spinel powder, 1% of metal aluminum powder, 1% of metal silicon powder and 1% of silicon carbide by weight.
The raw materials used in the outer layer material comprise, by weight, 70% of alumina, 21% of fused quartz and 9% of soft clay.
Example four:
the inner layer material comprises, by weight, 4% of crystalline flake graphite, 76.8% of corundum, 10% of magnesium-aluminum spinel powder, 1.2% of metal aluminum powder, 4% of metal silicon powder and 4% of silicon carbide.
The raw materials used in the outer layer material comprise 80% of corundum, 15% of fused quartz and 5% of soft clay in percentage by weight.
The composite technology is adopted in the specific embodiment, the electric conduction and heat conduction performance of the flake graphite can be effectively overcome, the blocking of a water gap is avoided, the bonding agent is added into the graphite material, the graphite material is easy to cure, the sintering-free low carbon is realized, the environmental pollution is reduced, the cost is reduced, the formula is optimized, and the service life is greatly prolonged.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (1)
1. The utility model provides a non-burning low carbon is compound prevents stifled well package mouth of a river which characterized in that: it consists of an inner layer material and an outer layer material; the weight percentage of the raw materials used in the inner layer material is 1-7% of crystalline flake graphite, 50-90% of corundum, 1-15% of magnesium-aluminum spinel powder, 0.5-2% of metal aluminum powder, 1-6% of metal silicon powder and 0.4-6% of boron carbide or silicon carbide; the sum of the weight percentages of the raw materials is 100 percent;
the outer layer material comprises, by weight, 50-90% of alumina or corundum, 3-45% of fused quartz, 1-5% of soft clay and 4% of feldspar powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159420.XA CN106747511B (en) | 2016-12-15 | 2016-12-15 | Baking-free low-carbon composite anti-blocking tundish nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159420.XA CN106747511B (en) | 2016-12-15 | 2016-12-15 | Baking-free low-carbon composite anti-blocking tundish nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106747511A CN106747511A (en) | 2017-05-31 |
| CN106747511B true CN106747511B (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611159420.XA Active CN106747511B (en) | 2016-12-15 | 2016-12-15 | Baking-free low-carbon composite anti-blocking tundish nozzle |
Country Status (1)
| Country | Link |
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| CN (1) | CN106747511B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458377A (en) * | 2020-03-30 | 2021-10-01 | 宝山钢铁股份有限公司 | Anti-caking tundish breathable water feeding port |
| CN116041080A (en) * | 2023-02-10 | 2023-05-02 | 西峡县西保冶金材料有限公司 | Scour-resistant low-carbon long-service-life stopper rod and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003226583A (en) * | 2002-02-01 | 2003-08-12 | Kurosaki Harima Corp | Unshaped refractory for hot metal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101474671A (en) * | 2009-01-19 | 2009-07-08 | 马鞍山市益江高温陶瓷制造有限公司 | Spinelle ventilated tundish filling pipe end and method for producing the same |
| CN101927340A (en) * | 2010-05-17 | 2010-12-29 | 王世泰 | Aluminium (zirconium)-carbon long nozzle, submerged entry nozzle and monolithic stopper refractory products for continuous casting |
| CN101891444B (en) * | 2010-07-09 | 2012-08-29 | 三一重工股份有限公司 | Reinforced layer coating for use in hot investment casting and preparation method thereof |
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- 2016-12-15 CN CN201611159420.XA patent/CN106747511B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003226583A (en) * | 2002-02-01 | 2003-08-12 | Kurosaki Harima Corp | Unshaped refractory for hot metal |
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| CN106747511A (en) | 2017-05-31 |
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