CN108838384B - Immersion type water gap - Google Patents
Immersion type water gap Download PDFInfo
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- CN108838384B CN108838384B CN201810973368.4A CN201810973368A CN108838384B CN 108838384 B CN108838384 B CN 108838384B CN 201810973368 A CN201810973368 A CN 201810973368A CN 108838384 B CN108838384 B CN 108838384B
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- heat insulation
- insulation material
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- heat
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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
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- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
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Abstract
The invention belongs to the technical field of metallurgical continuous casting, and discloses an immersion type water gap, which comprises: the water gap main body and the heat insulation structure coated on the water gap main body; the insulation construction includes: a first layer of thermal insulation material, a second layer of thermal insulation material, and a third layer of thermal insulation material; the first heat insulation material layer is coated on the outer surface of the nozzle main body to form a contact heat insulation layer; the second heat insulation material layer is coated on the first heat insulation material layer and fixed by the first bonding materials distributed in a dotted array to form an air gap heat insulation layer; the third heat insulation material layer is coated on the second heat insulation material layer to form a protective heat insulation layer. The submerged nozzle provided by the invention can realize a good heat preservation effect.
Description
Technical Field
The invention relates to the technical field of metallurgical continuous casting, in particular to an immersion type water gap and a heat insulation structure thereof.
Background
During production of a continuous casting machine, when Al killed steel is poured by using an aluminum-carbon substrate immersion nozzle, due to poor heat preservation effect of the immersion nozzle, molten steel easily forms a net structure on the wall of the immersion nozzle, and therefore Al on the inner wall of the immersion nozzle is accelerated2O3And TiO3The accumulation of the steel slag causes water gap blockage and causes liquid level fluctuation of a crystallizer, thereby influencing the quality of casting blanks and seriously causing final break of pouring.
Disclosure of Invention
The invention provides an immersion nozzle, which solves the technical problem of poor heat insulation performance of the immersion nozzle in the prior art.
In order to solve the above technical problem, the present invention provides an immersion nozzle, comprising: the water gap main body and the heat insulation structure coated on the water gap main body;
the insulation construction includes: a first layer of thermal insulation material, a second layer of thermal insulation material, and a third layer of thermal insulation material;
the first heat insulation material layer is coated on the outer surface of the nozzle main body to form a contact heat insulation layer;
the second heat insulation material layer is coated on the first heat insulation material layer and fixed by the first bonding materials distributed in a dotted array to form an air gap heat insulation layer;
the third heat insulation material layer is coated on the second heat insulation material layer to form a protective heat insulation layer.
Further, heat insulating material particles are attached to one surface of the first heat insulating material layer, which is in contact with the nozzle body.
Further, the heat-insulating material particles are one or a mixture of two of graphite particles and aluminum oxide particles.
Further, the first thermal insulation material layer is also fixed on the outer surface of the nozzle body through a second bonding material distributed in a dotted array.
Further, the overlapping rate of the bonding points of the dot distribution array of the second bonding material and the dot distribution array of the first bonding material is 50% or less.
Further, the first heat insulation material layer, the second heat insulation material layer and the third heat insulation material layer are made of refractory felt or cloth.
Further, the thickness of the first heat insulation material layer is 1mm, the thickness of the second heat insulation material layer is 2-5mm, and the thickness of the third heat insulation material layer is 5-10 mm.
Further, the third heat insulation material layer is fixed by adopting a binding method.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the submerged nozzle provided by the embodiment of the application realizes a reliable heat preservation and insulation effect by arranging three heat insulation material layers and designing a structural scheme; specifically, a contact heat insulation structure is formed by coating the first heat insulation material layer outside the water gap main body, so that heat radiation is controlled; the second heat insulation material layer is coated outside the first heat insulation material layer and is fixed through the first bonding materials distributed in a dotted array, so that an air gap heat insulation layer is formed, and heat is insulated by air to isolate convection heat transfer; and then further set up the cladding of third thermal insulation material layer outside the second thermal insulation material layer to whole ligature is fixed, when realizing the stability of structure, also can further promote the thermal-insulated effect of heat preservation.
Drawings
Fig. 1 is a schematic layout view of a heat-insulating structure of a submerged nozzle provided by the present invention.
Detailed Description
The embodiment of the application solves the technical problem that the immersion nozzle is poor in heat preservation performance in the prior art by providing the immersion nozzle.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, a submerged entry nozzle, comprising: the water gap comprises a water gap main body 1 and a heat insulation structure coated on the water gap main body; realize heat insulation.
Specifically, the insulation structure includes: the first heat insulation material layer 2, the second heat insulation material layer 3 and the third heat insulation material layer 4 form a three-layer stacked heat insulation structure.
The first heat insulation material layer 2 is coated on the outer surface of the nozzle main body 1 to form a contact heat insulation layer, so that contact heat insulation is realized, and heat radiation is reduced.
The second heat insulation material layer 3 is coated on the first heat insulation material layer 2 and fixed through the first bonding materials 7 distributed in a dotted array to form an air gap heat insulation layer 6, so that heat convection is separated from the formed air gap, and heat insulation is realized.
The third heat insulation material layer 4 is coated on the second heat insulation material layer 3 to form a protective heat insulation layer, so that heat transfer is further reduced, and heat insulation is realized.
In order to improve contact thermal insulation and reduce heat radiation, thermal insulation material particles 8 are attached to one surface of the first thermal insulation material layer 2, which is in contact with the nozzle body 1, so that the contact thermal insulation effect is improved through discrete particles, and the heat radiation is reduced.
Generally, the heat insulating material particles 8 are graphite particles or alumina particles or a mixture of the graphite particles and the alumina particles, but may be other heat insulating material particles.
Further, the first thermal insulation material layer 2 is also fixed on the outer surface of the nozzle body 1 by the second bonding material 9 distributed in a dotted array, forming a similar air space, reducing heat transfer.
In general, the overlapping rate of the bonding points of the dot distribution array of the second bonding material 9 and the dot distribution array of the first bonding material 7 is 50% or less. That is, overlapping of more than half of the bonding points is avoided, thereby avoiding the influence of the bonding reliability.
Generally, the first thermal insulation material layer 2, the second thermal insulation material layer 3, and the third thermal insulation material layer 4 are made of refractory felt or cloth, and may be other thermal insulation materials.
Taking the asbestos felt as an example, the thickness of the first heat insulation material layer 2 is 1mm, the thickness of the second heat insulation material layer 3 is 2-5mm, and the thickness of the third heat insulation material layer 4 is 5-10mm, so that the optimal balance between the heat insulation effect and the structural reliability can be realized.
And binding a binding belt 5 outside the third heat insulation material layer 4, and fixing by adopting a binding method.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the submerged nozzle provided by the embodiment of the application realizes a reliable heat preservation and insulation effect by arranging three heat insulation material layers and designing a structural scheme; specifically, a contact heat insulation structure is formed by coating the first heat insulation material layer outside the water gap main body, so that heat radiation is controlled; a second heat insulation material layer is coated outside the first heat insulation material layer and is fixed through first bonding materials distributed in a dotted array, so that an air gap heat insulation layer is formed, convection heat transfer is separated through air, and heat insulation is achieved; and then further set up the cladding of third thermal insulation material layer outside the second thermal insulation material layer to whole ligature is fixed, when realizing the stability of structure, also can further promote the thermal-insulated effect of heat preservation.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (4)
1. A submerged entry nozzle, comprising: the water gap main body and the heat insulation structure coated on the water gap main body;
the insulation construction includes: a first layer of thermal insulation material, a second layer of thermal insulation material, and a third layer of thermal insulation material;
the first heat insulation material layer is coated on the outer surface of the nozzle main body to form a contact heat insulation layer;
the second heat insulation material layer is coated on the first heat insulation material layer and fixed by the first bonding materials distributed in a dotted array to form an air gap heat insulation layer;
the third heat insulation material layer is coated on the second heat insulation material layer to form a protective heat insulation layer;
wherein the first heat insulation material layer is also fixed on the outer surface of the nozzle main body through second bonding materials distributed in a dotted array;
the coincidence rate of the bonding points of the dot distribution array of the second bonding material and the dot distribution array of the first bonding material is less than or equal to 50%;
wherein heat insulation material particles are attached to one surface of the first heat insulation material layer, which is in contact with the nozzle body;
the heat-insulating material particles are one or a mixture of graphite particles and aluminum oxide particles.
2. The submerged entry nozzle of claim 1, characterized in that: the first heat insulation material layer, the second heat insulation material layer and the third heat insulation material layer are made of refractory felt or cloth.
3. The submerged entry nozzle of claim 2, characterized in that: the thickness of the first heat insulation material layer is 1mm, the thickness of the second heat insulation material layer is 2-5mm, and the thickness of the third heat insulation material layer is 5-10 mm.
4. The submerged entry nozzle of claim 3, characterized in that: and the third heat-insulating material layer is fixed by adopting a binding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810973368.4A CN108838384B (en) | 2018-08-24 | 2018-08-24 | Immersion type water gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810973368.4A CN108838384B (en) | 2018-08-24 | 2018-08-24 | Immersion type water gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108838384A CN108838384A (en) | 2018-11-20 |
| CN108838384B true CN108838384B (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810973368.4A Active CN108838384B (en) | 2018-08-24 | 2018-08-24 | Immersion type water gap |
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| Country | Link |
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| CN (1) | CN108838384B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4953762A (en) * | 1987-09-24 | 1990-09-04 | Foseco International Limited | Pouring tubes |
| CN1493416A (en) * | 2002-11-01 | 2004-05-05 | 黄小弟 | Manufacturing method of component part having composite layer |
| CN201455254U (en) * | 2009-04-29 | 2010-05-12 | 天津钢管集团股份有限公司 | Asbestos heat-insulating sleeve for submerged nozzle |
| CN201711532U (en) * | 2010-07-23 | 2011-01-19 | 武汉钢铁(集团)公司 | Submersed nozzle roasting jacket |
| CN206356573U (en) * | 2016-11-30 | 2017-07-28 | 宝山钢铁股份有限公司 | Tundish cover |
-
2018
- 2018-08-24 CN CN201810973368.4A patent/CN108838384B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4953762A (en) * | 1987-09-24 | 1990-09-04 | Foseco International Limited | Pouring tubes |
| CN1493416A (en) * | 2002-11-01 | 2004-05-05 | 黄小弟 | Manufacturing method of component part having composite layer |
| CN201455254U (en) * | 2009-04-29 | 2010-05-12 | 天津钢管集团股份有限公司 | Asbestos heat-insulating sleeve for submerged nozzle |
| CN201711532U (en) * | 2010-07-23 | 2011-01-19 | 武汉钢铁(集团)公司 | Submersed nozzle roasting jacket |
| CN206356573U (en) * | 2016-11-30 | 2017-07-28 | 宝山钢铁股份有限公司 | Tundish cover |
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| Publication number | Publication date |
|---|---|
| CN108838384A (en) | 2018-11-20 |
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