CN113084137B - Installation method of continuous casting tundish heat-insulating layer and continuous casting tundish - Google Patents
Installation method of continuous casting tundish heat-insulating layer and continuous casting tundish Download PDFInfo
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- CN113084137B CN113084137B CN202110218083.1A CN202110218083A CN113084137B CN 113084137 B CN113084137 B CN 113084137B CN 202110218083 A CN202110218083 A CN 202110218083A CN 113084137 B CN113084137 B CN 113084137B
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- tundish
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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
- B22D41/02—Linings
- B22D41/023—Apparatus used for making or repairing linings
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Abstract
The invention provides a method for installing a continuous casting tundish heat-insulating layer and a continuous casting tundish, which adopt a modularized installation mode, firstly, a steel plate on the inner wall of the tundish is punched again, anchoring nails are installed in a split mode, the anchoring nails are welded on holes punched on the steel plate on the inner wall of the tundish, holes are drilled in the middles of the anchoring nail bodies and used for draining water or water vapor, nano heat-insulating materials are hard materials and are cut into a plurality of blocks, the anchoring nails and a nano heat-insulating material with fixed size are used as a module unit, the tundish cladding steel plate is divided into a plurality of module units, and after all the module units are installed, the nano heat-insulating materials of the whole tundish are assembled.
Description
Technical Field
The invention belongs to the field of continuous casting tundish heat insulation, and particularly relates to a method for installing a continuous casting tundish heat insulation layer and a continuous casting tundish obtained by the method.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The cladding and the refractory material of the continuous casting tundish are generally divided into three layers, namely a working layer, a permanent layer and a tundish cladding steel plate from inside to outside, wherein in order to connect the refractory material of the permanent layer and the steel plate together, a plurality of anchoring nails are welded on the steel plate, and the knotting method of the permanent layer is as follows: the refractory material of the permanent layer is an indefinite material and is a paste which is mixed into a similar concrete after being added with water, when knotting, a tundish permanent layer mould is firstly added into a tundish, then the refractory material of the permanent layer is filled into a gap between a steel plate and the permanent layer mould, because the refractory material is a paste, an anchoring nail can be easily wrapped in the paste, after the paste is filled and tamped, the tundish permanent layer mould is baked and heated to shape the pasty refractory material of the permanent layer, after a period of shaping, the permanent layer mould is lifted out, and then the shaped refractory material is baked and dehydrated, wherein the baking time is more than 24 hours, and the baking temperature is more than 1000 ℃. After the refractory material of the permanent layer of the tundish is baked, a working layer moulding bed of the tundish is added into the tundish, and the working layer moulding bed is similar to the permanent layer moulding bed but slightly smaller in size. Then filling the refractory material of the working layer into the gap between the permanent layer and the working layer moulding bed, wherein the refractory material of the working layer generally adopts dry material and resin binder, after the working layer is filled and tamped firmly, baking and heating the moulding bed of the working layer of the tundish to shape the dry material of the working layer, after a period of shaping, lifting out the moulding bed of the working layer, and then baking the shaped working layer.
The refractory material structure of the tundish is shown in figure 1, and the refractory material structure of the tundish is firm and has a good application effect on site. But has a fatal shortcoming that the heat-insulating property of the refractory material is poor, the temperature of molten steel in the tundish exceeds 1500 ℃, and the working temperature of the tundish can is about 280-300 ℃. In order to insulate the tundish, a layer of nano insulation material with the thickness of 10-12mm is usually added between the permanent layer and the tundish steel shell, the nano insulation material is a setting material, but because a plurality of anchoring nails are welded on the steel plate of the tundish shell, the anchoring nails need to be penetrated when the nano insulation material is required to be installed, the installation is very difficult, and the body of the nano insulation material is damaged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for installing a modularized continuous casting tundish heat-insulating layer.
In order to realize the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for installing a modular continuous casting tundish heat-insulating layer, including the following steps:
step 1: punching a plurality of mounting holes on the steel plate on the inner wall of the tundish again;
step 2: welding a nail body of an anchoring nail in each mounting hole;
and step 3: manufacturing a modularized nano heat-insulating material bag;
and 4, step 4: placing the prepared nano heat-insulating material bag into a gap formed by the nail bodies of the adjacent anchoring nails;
and 5: and placing a gasket on the nail body of each anchoring nail, and screwing down the nail head of the anchoring nail.
As a further technical scheme, the distances between the adjacent mounting holes are equal or unequal.
As a further technical scheme, the diameters of the mounting holes are equal or different.
As a further technical scheme, the nano heat-insulating material bag is provided with two layers, wherein one layer is arranged along the width direction of the steel plate on the inner wall of the tundish, and the other layer is arranged along the length direction of the steel plate on the inner wall of the tundish.
As a further technical scheme, the method for manufacturing the nano heat-preservation material bag comprises the following steps: cutting the nano heat-insulating material into a plurality of blocks, sleeving each cut nano heat-insulating material bag by using an aluminum bumping bag, and then vacuumizing and sealing.
As a further technical scheme, the cutting shape of the nano heat-insulating material bag is set according to the shape of the layout of the anchoring nails.
In a second aspect, the invention also provides a continuous casting tundish, wherein the heat-insulating layer is installed by adopting the installation method of the continuous casting tundish heat-insulating layer.
In a third aspect, the invention also provides a continuous casting tundish, wherein the heat-insulating layer comprises a plurality of modules, each module comprises a heat-insulating block and a plurality of anchoring nails which are used for fixing the heat-insulating block and do not penetrate through the interior of the heat-insulating block.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
1) Punching is carried out on the tundish steel plate, and the modularized installation of the nanometer heat-insulation plate can be realized.
2) The hollow anchoring nails are used and welded on the corresponding holes of the tundish steel plate, so that a permanent layer can be formed.
3) The water in the refractory material is guided out of the tundish, so that the situation that the water or water vapor cannot escape to damage the refractory material of the permanent layer is avoided.
4) The nano plate is additionally arranged between the tundish steel cladding and the permanent layer, the heat conductivity coefficient of the nano plate is extremely low, and a good heat insulation effect can be achieved.
5) In order to protect the nano-plate, an aluminum foil bag is sleeved into the nano-plate for vacuumizing and waterproof protection, so that the nano-plate can be ensured.
6) It is not affected by damp. And the aluminum foil has high heat resistance and can be prevented from being damaged at the temperature below 400 ℃.
7) The nano-plate is installed in two layers, one layer is installed longitudinally, and the other layer is installed transversely, so that the heat preservation effect is ensured to the maximum extent.
8) The split type anchoring nail is used, the nano plate is convenient to install, the vertical and horizontal layers of nano plates are used, the problem that the anchoring nail can be ingenious is that the anchoring nail must penetrate through the installation mode of the nano plate, and the nano plate is prevented from being damaged.
9) According to the installation mode, the nano plate is firstly subjected to water-proof treatment by vacuumizing the aluminum foil bag, and the installation mode of the split type anchoring nail and the longitudinal and transverse two layers of nano plates does not need the anchoring nail to penetrate through the nano plate, so that the waterproof problem of the nano plate is fundamentally solved, and the nano plate can be ensured to always keep an efficient heat preservation effect in the whole working process.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a schematic illustration of tundish refractory;
FIG. 2 is a schematic view of the inner wall of the tundish being perforated;
FIG. 3 is a schematic view of an anchor stud;
FIG. 4 is a schematic illustration of the installation of a first layer of nanoplates;
FIG. 5 is a schematic illustration of the installation of a second layer of nanoplates;
in the figure: the spacing or size between each other is exaggerated to show the location of the locations, and the illustration is for illustrative purposes only.
The middle bag comprises an inner wall steel plate 1, a mounting hole 2, an anchoring nail head 3 and an anchoring nail body 4.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as introduced by the background art, the prior art has shortcomings, and in order to solve the technical problems, the invention provides a method for installing a continuous casting tundish heat-insulating layer and a continuous casting tundish obtained by the method; the invention adopts a modularized installation mode, firstly, the steel plate on the inner wall of the tundish is punched again, the anchoring nails are installed in a split mode, the anchoring nails are welded on the punched holes of the steel plate on the inner wall of the tundish, and holes are drilled in the middle of the anchoring nail body for draining water; the module unit is composed of a plurality of anchoring nails and a nano heat-insulating material with a fixed size, the tundish cladding steel plate is divided into a plurality of module units, and after all the module units are installed, the nano heat-insulating material of the whole tundish is assembled.
In an exemplary embodiment of the present invention, as shown in fig. 2, 3, 4, and 5: the embodiment provides an installation method of a continuous casting tundish heat-insulating layer, which comprises the following steps:
step 1: mounting holes 2 are punched in the steel plate 1 of the inner wall of the tundish again, the inner wall of the tundish is punched as shown in fig. 2, in the embodiment, 5 rows and 6 columns of mounting holes are punched in the steel plate of the inner wall of the tundish of fig. 2, the distance between every two adjacent mounting holes is equal, the diameter of each mounting hole is the same, for example, the distance between the holes shown in the embodiment is 300mm, and the diameter of each hole is 8mm.
Of course, it is understood that in other embodiments, the hole pitch and the hole diameter may be in other sizes, and are set according to actual needs.
Further, it is understood that in other embodiments, the sizes of the mounting holes may be different, that is, the sizes of the mounting holes are different, or the inner wall steel plate is divided into different regions according to the regions, the sizes of the mounting holes in the same region are the same, and the sizes of the mounting holes in different regions are different.
And 2, adopting a split type installation mode of the anchoring nail, namely welding the nail body of the anchoring nail to the hole punched by the steel plate on the inner wall of the tundish, and installing the head part of the anchoring nail after the nano thermal insulation material is prepared (see step 3 for the installation of the head part of the anchoring nail), wherein the nail body of the anchoring nail is required to be provided with a drilling hole coaxial with the head part of the anchoring nail. In the embodiment, the diameter of the nail body of the anchoring nail is 10mm, the height of the nail body is 30mm, the upper part of the nail body is an outer wire with the diameter of 10mm, and a hole with the diameter of 8mm is drilled in the middle of the nail body; of course, it will be appreciated that in other embodiments, the anchor studs may be sized, in particular, according to actual requirements. It is important that the dimensions thereof are matched to the dimensions of the mounting holes mentioned above.
in this embodiment, because the nail height is 30mm, two-layer nanometer thermal insulation material package is installed to this embodiment, and consequently the thickness design of every layer of nanometer thermal insulation material package is 10 mm's hard material, then cuts nanometer thermal insulation material into the length and wide for 578mm 278mm's rectangular block, then imbeds each nanometer thermal insulation material package that has cut with the aluminium bag, then carries out evacuation sealing, and each modularized nanometer material package just accomplishes like this.
It should be noted that, the cutting size of the nano thermal insulation material bag in this embodiment is set according to the distance between the holes in the front, and in this embodiment, the distance between the holes is 300mm, so in this embodiment, the size of the rectangular block is 578mm × 278mm.
It should be noted that the cut shape of the nano thermal insulation material bag may also be a triangle or other shapes, for example: the anchoring nails can be divided into different areas, and the shape of the nano thermal insulation material is cut according to the shape of each area. Further, the overall arrangement area of the nano heat-insulating material bag is set according to actual needs.
it should be noted that, in some cases, the nano thermal insulation material bag may be provided with a layer.
And 5, putting a gasket on each anchoring nail to hold the nano plate, and screwing the head of each anchoring nail to the nail body of the corresponding anchoring nail to firmly fix the nano plate on the inner wall steel plate of the tundish.
And finishing the manufacture of the heat-insulating layer of the whole continuous casting tundish.
Further, the embodiment also discloses a continuous casting tundish manufactured by the method disclosed by the embodiment.
Further, the present embodiment also provides a continuous casting tundish, wherein the heat insulation layer comprises a plurality of modules, and the edges of the modules are fixed by the anchoring nails which do not penetrate through the interior of the modules.
Finally, it is also noted that relational terms such as first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for installing a continuous casting tundish heat-insulating layer is characterized by comprising the following steps:
step 1: punching a plurality of mounting holes on the steel plate on the inner wall of the tundish again;
and 2, step: welding a nail body of an anchoring nail in each mounting hole;
and step 3: manufacturing a modularized nano heat-insulating material bag;
and 4, step 4: placing the prepared nano heat-insulating material bag into a gap formed by the nail bodies of the adjacent anchoring nails;
and 5: placing a gasket on the nail body of each anchoring nail, and screwing down the nail head of the anchoring nail;
the installation of nanometer insulation material package two-layer, the one deck is along the width direction setting of middle package inner wall steel sheet, another layer sets up along the length direction of middle package inner wall steel sheet, the shape setting according to the anchor nail overall arrangement of cutting shape of nanometer insulation material package, the method of preparation nanometer insulation material package is: cutting the nanometer heat-insulating material into a plurality of blocks, sleeving each cut nanometer heat-insulating material by using an aluminum foil bag, then vacuumizing and sealing, wherein a nail body of the anchoring nail is provided with a drain hole, the anchoring nail is welded on a hole punched by a steel plate on the inner wall of the tundish, and the drain hole is arranged along the axial direction of the anchoring nail.
2. The method of installing a thermal insulation layer of a continuous casting tundish according to claim 1, wherein the intervals between adjacent installation holes are equal or different.
3. The method of installing a thermal insulation layer of a continuous casting tundish according to claim 1, wherein the diameter of each installation hole is equal or different.
4. A continuous casting tundish, characterized in that its insulation layer is installed by the method of installation of the continuous casting tundish insulation layer according to any one of claims 1 to 3.
5. A continuous casting tundish according to claim 4, wherein the insulation comprises a plurality of modules, each module comprising an insulation block and a plurality of anchor pins for securing the insulation block without passing through the interior of the insulation block.
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| CN202110218083.1A CN113084137B (en) | 2021-02-26 | 2021-02-26 | Installation method of continuous casting tundish heat-insulating layer and continuous casting tundish |
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| CN202110218083.1A CN113084137B (en) | 2021-02-26 | 2021-02-26 | Installation method of continuous casting tundish heat-insulating layer and continuous casting tundish |
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