Composite tank cover with high wear resistance and high temperature resistance

Abstract

The utility model relates to the field of metal casting, in particular to a high-wear-resistant high-temperature-resistant composite tank cover which comprises a shell, a heat preservation layer area and a light refractory castable layer area, the shell is of a semi-closed surrounding structure, the heat preservation layer area is arranged on the partial area of the inner peripheral side of the shell, and a heat preservation layer is arranged in the heat preservation layer area; a light refractory castable layer area is arranged in the middle area in the shell, the heat preservation layer area is tightly connected with the light refractory castable layer area, light refractory castable is poured in the light refractory castable layer area, and the outer side, located on the light refractory castable layer area, of the shell is connected with a protection plate. According to the utility model, the normal performance of high temperature resistance is realized, the weight is light, the use load is not increased, and the light refractory castable layer area is arranged, so that heat can be prevented from being transferred to the shell to a greater extent, and deformation caused by high temperature is prevented; and the protection plate is adopted in the area exposed below the high-temperature tank opening, so that the wear resistance is enhanced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of metal casting, in particular to a highly wear-resistant and high-temperature-resistant composite tank cover. Background Art

[0002] At present, due to the increasing requirements of environmental protection and energy conservation in steel enterprises, various steel enterprises have successively installed molten iron tank capping devices in the transportation of molten iron, so as to achieve the effect of environmental protection and energy conservation by covering the entire molten iron transportation. Due to the high temperature of the tank mouth and the serious slag accumulation at the tank mouth, the tank cover often rubs against the slag, causing the refractory material of the tank cover to fall off easily, which in turn causes the local burn damage of the tank cover near the tank mouth, and even affects the use; due to the damage of the tank cover, it cannot play a heat preservation effect, which does not meet the requirements of environmental protection policies, and has become a problem that the industry urgently needs to solve.

[0003] The tank cover in the prior art adopts an insulated tank cover inlaid with rock wool, which is generally made of an outer shell made of ordinary steel plate or 304 stainless steel plate, with rock wool inlaid inside as a fire-resistant insulation layer, and the rock wool is pressed against the outer shell by anchor bolts.

[0004] The above solution has the following technical problems:

[0005] Although the rock wool embedded inside the tank cover has good high temperature resistance, the rock wool itself is very soft and not wear-resistant. When there is slag accumulation at the tank mouth, the slag and the rock wool insulation layer will be scratched and the insulation layer will fall off, making the tank cover shell directly exposed to the high temperature baking of molten iron, which seriously affects the service life of the tank cover, is not convenient for production organization and operation, is not conducive to user operation and use, and is not conducive to enterprise development. Utility Model Content

[0006] In view of the above-mentioned problems, the utility model proposes a highly wear-resistant and high-temperature resistant composite tank cover, which has normal high-temperature resistance performance, is light in weight and does not increase the load. A lightweight refractory castable layer area is provided to isolate heat transfer to the outer shell to a greater extent and prevent deformation caused by high temperature. A protective plate is used in the area exposed under the high-temperature tank mouth to enhance its wear resistance and increase its service life.

[0007] To achieve the above purpose, the utility model is implemented according to the following technical solutions:

[0008] A highly wear-resistant and high-temperature resistant composite tank cover comprises an outer shell, an insulation layer area and a lightweight refractory castable layer area, wherein the outer shell is a semi-enclosed surrounding structure, an insulation layer area is arranged in a partial area of ​​the inner circumferential side of the outer shell, and the insulation layer area is provided with an insulation layer; a lightweight refractory castable layer area is arranged in the inner middle area of ​​the outer shell, the insulation layer area is closely connected with the lightweight refractory castable layer area, lightweight refractory castable is cast in the lightweight refractory castable layer area, and the outer shell is located on the outer side of the lightweight refractory castable layer area and connected to a protective plate.

[0009] In a possible technical solution, the protective plate is made of 310S stainless steel.

[0010] In a possible technical solution, the shell and the protective plate are connected by bolts, and the bolts are made of 310S stainless steel.

[0011] In a possible technical solution, a portion of the top of the shell located in the lightweight refractory castable layer area is fixedly connected with a plurality of anchors.

[0012] In a possible technical solution, the plurality of anchors are evenly arranged and are all V-shaped.

[0013] In a possible technical solution, a rib plate is provided between the insulation layer area and the lightweight refractory castable layer area, the rib plate is fixedly connected to the outer shell, a steel wire mesh is arranged in the lightweight refractory castable layer area, and the steel wire mesh is fixedly connected to the rib plate.

[0014] In a possible technical solution, the steel mesh is arranged in the longitudinal middle position of the lightweight refractory castable layer area, and a support pad is connected to the side of the steel mesh that is biased toward the top of the shell to determine the position of the steel mesh.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The high-wear-resistant and high-temperature-resistant composite tank cover of the utility model adopts a zoning design according to the need to match the high-temperature tank mouth. The insulation layer area can continue to be filled with the insulation layer of the existing tank cover, or can be filled with a material with stronger insulation performance; the lightweight refractory castable layer area corresponds to the position of the high-temperature tank mouth when in use, and has better heat insulation and wear resistance than the existing insulation layer; the insulation layer area and the lightweight refractory castable layer area form a composite structure, which does not affect the normal function of the tank cover, while ensuring that the overall weight of the tank cover is light and does not increase the use load, and improves the high temperature resistance and wear resistance of the tank cover when in use. It has the characteristics of reasonable and ingenious design, full use of space, and easy use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a top view of the structure of the highly wear-resistant and high-temperature-resistant composite tank cover of Example 1 of the utility model.

[0019] Figure 2 for Figure 1 AA section structure diagram.

[0020] Figure 3 for Figure 1 The structural section diagram along the BB axis.

[0021] Figure 4 This is a cross-sectional structural diagram of a highly wear-resistant and high-temperature-resistant composite tank cover according to Example 2 of the utility model.

[0022] Figure numerals: 100 - shell; 200 - insulation layer area; 300 - lightweight refractory castable layer area; 301 - protective plate; 302 - bolts; 303 - anchors; 304 - rib plate; 305 - wire mesh; 306 - support pad. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0024] Example 1

[0025] like Figure 1-Figure 2As shown, Example 1 of the utility model proposes a highly wear-resistant and high-temperature resistant composite tank cover, comprising an outer shell 100, an insulation layer area 200 and a lightweight refractory castable layer area 300. In order to adapt to the tank cover with two relatively open and closed petals of the existing molten iron tank capping device, the outer shell 100 is a semi-closed surrounding structure with a semicircular outline. The outer shell 100 is made of stainless steel. The insulation layer area 200 is arranged in a partial area of ​​the inner circumferential side of the outer shell 100, and the insulation layer area 200 is provided with an insulation layer; optionally, the insulation layer is zirconium silicate aluminum insulation cotton; a lightweight refractory castable layer area 300 is arranged in the inner middle area of ​​the outer shell 100, and the insulation layer area 200 is closely connected with the lightweight refractory castable layer area 300, and a lightweight refractory castable is cast in the lightweight refractory castable layer area 300, and the lightweight refractory castable has certain refractory performance and good insulation performance. Thermal performance, small volume density, low thermal conductivity, light weight, does not increase the use load, and does not affect the normal high temperature resistance function; the middle area uses lightweight refractory castables instead of rock wool insulation layer. When in use, the lightweight refractory castable layer area 300 corresponds to the high-temperature tank mouth position, and the lightweight refractory castable can isolate the heat of molten iron from being transferred to the outer shell to a greater extent, thereby preventing the tank cover from being deformed due to excessive temperature; the outer shell 100 is located on the outside of the lightweight refractory castable layer area 300 and is connected to a protective plate 301, which is flush with the outer shell 100; the protective plate 301 has wear-resistant performance, instead of the rock wool insulation layer, it is directly exposed under the high-temperature tank mouth, avoiding the falling off of the tank cover body profile, and increasing the service life of the tank cover; and the thermal insulation effect of the tank cover is enhanced, which solves the damage problem caused by the scratch between the tank cover and the accumulated slag in the industry, and meets the requirements of environmental protection policies.

[0026] The highly wear-resistant and high-temperature resistant composite tank cover of the utility model adopts a zoning design according to the need to match the high-temperature tank mouth. The insulation layer area 200 can continue to be filled with the insulation layer of the existing tank cover, or it can be filled with a material with stronger insulation performance; the lightweight refractory castable layer area 300 corresponds to the position of the high-temperature tank mouth when in use, and has better heat insulation and wear resistance than the existing insulation layer; the insulation layer area 200 and the lightweight refractory castable layer area 300 form a composite structure, which not only ensures that the overall weight of the tank cover is light and does not increase the use load without affecting the normal function of the tank cover, but also improves the high temperature resistance and wear resistance of the tank cover when in use. It has the characteristics of reasonable and ingenious design, full use of space, and easy use and maintenance.

[0027] Specifically, the lightweight refractory castable is a mixture composed of refractory aggregate, binder and admixture, which is mixed with water (or liquid binder) to form a mud material that can be constructed by pouring method. The material has the characteristic of being resistant to high temperature of 1800 degrees; the protective plate 301 is made of 310S stainless steel, which has the characteristic of being resistant to high temperature of 1400 degrees (according to the thermal creep performance test of 310S stainless steel, its temperature resistance can reach up to 1420 degrees), which can meet the actual working conditions; the outer shell 100 and the protective plate 301 are connected by bolts 302, and the bolts 302 are made of 310S stainless steel; the purpose of setting the protective plate 301 as a replaceable connection mode is that when the protective plate 301 is damaged or falls off, it can be discovered and replaced and repaired in time, thereby reducing maintenance costs; the castable is attached to the tank cover in the form of a "permanent layer" to ensure that the tank cover will not be burned in a short period of time after the protective plate 301 falls off.

[0028] Preferably, the top of the shell 100 located in the lightweight refractory castable layer area 300 is fixedly connected with a plurality of anchors 303 to enhance the connection strength between the lightweight refractory castable layer area 300 and the shell 100; Figure 3 As shown, the anchor pieces 303 are formed into a V-shape using round steel of φ6 mm made of Q235B material, and the anchor pieces 303 are welded to the top plate of the housing 100 at equal intervals.

[0029] Further preferably, a rib plate 304 is provided between the insulation layer area 200 and the lightweight refractory castable layer area 300, the rib plate 304 is fixedly connected to the outer shell 100, and a wire mesh 305 is arranged in the lightweight refractory castable layer area 300 to further consolidate the anchoring effect; the wire mesh 305 is fixedly connected to the rib plate 304; optionally, the wire mesh 305 can be a galvanized wire mesh; as one of the example implementations, the rib plate 304 is longitudinally arranged between the insulation layer area 200 and the lightweight refractory castable layer area 300, the wire mesh 305 is arranged in the longitudinal middle position of the lightweight refractory castable layer area 300, and a support pad 306 is connected to the side of the wire mesh biased toward the top of the outer shell 100 to determine the position of the wire mesh 305.

[0030] Example 2

[0031] like Figure 1 Combination Figure 4As shown, Example 2 of the utility model proposes a highly wear-resistant and high-temperature resistant composite tank cover, and its corresponding parts with Example 1 are marked with the same marks as Example 1, and the same performance of the corresponding parts is not repeated; it includes an outer shell 100, an insulation layer area 200 and a lightweight refractory castable layer area 300, the outer shell 100 is a semi-closed surrounding structure with a semicircular outline, the outer shell 100 is made of stainless steel, and the insulation layer area 200 is arranged in a peripheral area of ​​the inner side of the outer shell 100, and the insulation layer area 200 is provided with an insulation layer; optionally, the insulation layer is zirconium-containing Aluminum silicate insulation cotton; specifically, the thickness of the insulation layer area 200 is 100mm; a lightweight refractory castable layer area 300 is arranged in the inner middle area of ​​the shell 100, the insulation layer area 200 is closely connected to the lightweight refractory castable layer area 300, and the lightweight refractory castable layer area 300 is poured with lightweight refractory castable, and the shell 100 is located on the outer side of the lightweight refractory castable layer area 300 and connected to the protective plate 301; the thickness of the lightweight refractory castable layer area 300 is 50mm; the protective plate 301 is 310S stainless steel. The protective plate 301 is made of stainless steel, and the thickness of the protective plate 301 is 4mm; the outer shell 100 and the protective plate 301 are connected by bolts 302, and the bolts 302 are made of 310S stainless steel; the top of the outer shell 100 is located in the lightweight refractory castable layer area 300 and is fixedly connected with a plurality of anchors 303; the anchors 303 are formed into a V shape by using φ6mm round steel of Q235B material, and the height of the anchors 303 is 30mm, and the anchors 303 are welded on the top plate of the outer shell 100 with a spacing of 150mm; A rib plate 304 is provided between the insulation layer area 200 and the lightweight refractory castable layer area 300, and the rib plate 304 is longitudinally arranged between the insulation layer area 200 and the lightweight refractory castable layer area 300, and the rib plate 304 is fixedly connected to the outer shell 100, and a steel mesh 305 is arranged in the longitudinal middle position of the lightweight refractory castable layer area 300, and the steel mesh 305 is fixedly connected to the rib plate 304; a support pad 306 is connected to the side of the steel mesh biased toward the top of the outer shell 100, which is used to determine the position of the steel mesh 305.

[0032] The pouring construction process steps of a highly wear-resistant and high-temperature resistant composite tank cover in Example 2 of the utility model are as follows:

[0033] a. The surface of anchor 303 and the metal components buried in the lightweight refractory castable should be coated with asphalt paint or wrapped in plastic bags to buffer the expansion stress after heating;

[0034] b. The construction site must be clean, and no mud, sand, lime, silicate cement or other debris should be mixed into the castable. All tools and equipment in contact with the castable must not be contaminated with the above substances;

[0035] c. The suitable construction environment temperature is 10℃~25℃; during summer construction, it is strictly forbidden to place the castable in the open air, it should be placed in a cool place, the construction site should be shaded, and the mixing water temperature should not be higher than 20℃; during winter construction, when the ambient temperature is lower than 5℃, warm water (40℃~50℃) should be used for stirring. After construction, take appropriate insulation measures to keep the ambient temperature above 5℃, and the demoulding time should be no less than 48 hours; when the construction environment temperature is lower than 0℃, construction is strictly prohibited;

[0036] d. When stirring, dry-mix evenly before adding water. The water used in construction should be fresh, clean drinking water, and its pH value should be controlled between 7 and 7.5. Stir for 1 to 3 minutes after adding water. Stir evenly without dry material entrainment and agglomeration. Use up the mixed material within 30 minutes. The condensed material blocks cannot be stirred with water and should be thrown away.

[0037] e. The total thickness of the cast refractory material is 50mm. During the casting process, a layer of galvanized steel mesh 305 is laid at a height of about 25mm. A support pad 306 with a height of 25mm is welded under the steel mesh 305 to ensure the height. A vibrating rod is used for compaction during the casting process;

[0038] f. After construction, the paint should be cured and dried for about 72 hours;

[0039] g. After curing, install and tighten the 4mm thick 310S stainless steel protective plate 301 on top of the castable.

[0040] The structures of the present invention other than the above-mentioned installation method, connection method or setting method are all existing implementation methods. When a highly wear-resistant and high-temperature resistant composite tank cover of the present invention is used in a molten iron tank covering device, it only needs to be implemented according to the conventional installation and use methods in the prior art.

[0041] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A highly wear-resistant and high-temperature resistant composite can cover, characterized in that: The invention comprises an outer shell (100), an insulation layer area (200) and a lightweight refractory castable layer area (300), wherein the outer shell (100) is a semi-enclosed surrounding structure, the insulation layer area (200) is arranged in a peripheral area of ​​the inner part of the outer shell (100), and the insulation layer area (200) is provided with an insulation layer; the lightweight refractory castable layer area (300) is arranged in a middle area of ​​the inner part of the outer shell (100), the insulation layer area (200) is closely connected to the lightweight refractory castable layer area (300), and a lightweight refractory castable is cast in the lightweight refractory castable layer area (300), and the outer shell (100) is connected to a protective plate (301) on the outer side of the lightweight refractory castable layer area (300).

2. The highly wear-resistant and high-temperature-resistant composite can cover according to claim 1, characterized in that: The protective plate (301) is made of 310S stainless steel.

3. The highly wear-resistant and high-temperature-resistant composite can cover according to claim 1, characterized in that: The housing (100) and the protective plate (301) are connected by bolts (302), and the bolts (302) are made of 310S stainless steel.

4. The highly wear-resistant and high-temperature-resistant composite can cover according to claim 1, characterized in that: A portion of the top of the shell (100) located in the lightweight refractory castable layer area (300) is fixedly connected to a plurality of anchoring pieces (303).

5. The highly wear-resistant and high-temperature-resistant composite can cover according to claim 4, characterized in that: The plurality of anchoring pieces (303) are evenly arranged and are all V-shaped.

6. The highly wear-resistant and high-temperature-resistant composite can cover according to claim 1, characterized in that: A rib plate (304) is provided between the thermal insulation layer area (200) and the lightweight refractory castable layer area (300), the rib plate (304) is fixedly connected to the outer shell (100), and a steel wire mesh (305) is arranged in the lightweight refractory castable layer area (300), the steel wire mesh (305) is fixedly connected to the rib plate (304).

7. The highly wear-resistant and high-temperature-resistant composite can cover according to claim 6, characterized in that: The steel mesh (305) is arranged in the longitudinal middle position of the lightweight refractory castable layer area (300), and a support pad (306) is connected to one side of the steel mesh that is biased towards the top of the shell (100) to determine the position of the steel mesh (305).

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