Non-stick aluminum runner

Abstract

This utility model relates to the field of aluminum flow channel technology and discloses a non-stick aluminum flow channel, comprising a silicon nitride-bonded silicon carbide ceramic layer, an insulation layer, and a support layer arranged sequentially from the inside out. The silicon nitride-bonded silicon carbide ceramic layer is integrally formed and has a U-shaped cross-section. The inner lining of the non-stick aluminum flow channel uses a silicon nitride-bonded silicon carbide ceramic layer, which has excellent thermal shock resistance, does not wet with molten aluminum, ensures that the molten aluminum does not adhere after flowing through, and is easy to clean. Its high surface strength can resist the scouring and corrosion of molten aluminum, effectively preventing secondary contamination of the aluminum melt during transportation. In addition, this material does not absorb moisture and will not cause gas generation in the molten aluminum.

Description

Technical Field

[0001] This utility model relates to the field of aluminum flow channel technology, and in particular to a non-stick aluminum flow channel. Background Technology

[0002] Aluminum flow channels are key equipment in aluminum industry production used for conveying and distributing molten aluminum. They are crucial for ensuring continuous and stable flow of molten aluminum, improving production efficiency, and enhancing product quality. The design and manufacture of aluminum flow channels must take into account characteristics such as high-temperature resistance, corrosion resistance, thermal insulation performance, and ease of cleaning and maintenance.

[0003] CN212512530U discloses a flue gas preheating aluminum feeding trough, including a trough body, which includes a first steel plate and a second steel plate that are matched and arranged together. The cavity formed between the first steel plate and the second steel plate is a flue gas channel. Flue gas inlets and flue gas outlets are respectively opened at both ends of the trough body. The flue gas inlets and flue gas outlets are matched and connected to the flue gas channel. A refractory material is matched and arranged on the end face of the first steel plate away from the second steel plate. A first expansion cavity is matched and arranged between the refractory material and the first steel plate for filling with aluminum silicate fiber cotton.

[0004] In the aforementioned aluminum flow channel, refractory material is used as the inner lining of the aluminum flow channel. The refractory material is generally formed by casting alumina-based castable. However, the inner lining formed by alumina-based refractory material is prone to cracking when subjected to impact at high temperatures during use, which affects the service life of the aluminum flow channel. Utility Model Content

[0005] In view of this, it is necessary to provide a non-stick aluminum flow channel to solve the technical problem that the lining of the alumina-based aluminum flow channel in the prior art will crack when subjected to impact at high temperature.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a silicon nitride-bonded silicon carbide ceramic layer, an insulation layer, and a support layer arranged sequentially from the inside to the outside. The silicon nitride-bonded silicon carbide ceramic layer is integrally formed and has a U-shaped cross-section.

[0007] In one embodiment, the insulation layer has a mounting groove on the side opposite to the support layer, the silicon nitride-bonded silicon carbide ceramic layer is embedded in the mounting groove, and the inner wall of the silicon nitride-bonded silicon carbide ceramic layer is flush with the inner wall of the insulation layer.

[0008] In one embodiment, notches are formed on both sides of the silicon nitride-bonded silicon carbide ceramic layer, and a snap-fit ​​protrusion is formed on the insulation layer opposite the notch, the snap-fit ​​protrusion being engaged with the notch.

[0009] In one embodiment, the support layer includes a groove and two end plates. The groove has a U-shaped cross-section, and the two end plates are disposed at both ends of the groove and are connected to the groove. The insulation layer and the silicon nitride-bonded silicon carbide ceramic layer are embedded in the groove.

[0010] In one embodiment, the end plate has a plurality of mounting holes, and the mounting holes on two end plates are positioned correspondingly.

[0011] In one embodiment, the mounting hole is elongated.

[0012] In one embodiment, the support layer further includes a reinforcing plate connected to the groove and having two end plates connected to each end of the groove.

[0013] In one embodiment, the support layer further includes a top plate disposed above and connected to the reinforcing plate, the top plate extending above the insulation layer.

[0014] In one embodiment, the non-stick aluminum flow channel further includes a support and positioning structure disposed between the silicon nitride-bonded silicon carbide ceramic layer and the support layer, for positioning the silicon nitride-bonded silicon carbide ceramic layer.

[0015] In one embodiment, the support positioning structure is connected to the support layer and has a positioning groove that mates with the outer wall of the silicon nitride-bonded silicon carbide ceramic layer.

[0016] Compared with existing technologies, the beneficial effects of this utility model include: In this application, the lining of the non-stick aluminum flow channel is made of silicon nitride-bonded silicon carbide ceramic layer. This silicon nitride-bonded silicon carbide ceramic layer possesses excellent thermal shock resistance and does not wet the molten aluminum, ensuring that the molten aluminum does not adhere after flowing through, facilitating cleaning. Its high surface strength can resist the scouring and corrosion of the molten aluminum, effectively preventing secondary contamination of the aluminum melt during transportation. Furthermore, this material is non-hygroscopic and will not cause gas generation in the molten aluminum. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the non-stick aluminum flow channel according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the non-stick aluminum flow channel according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the non-stick aluminum channel after the insulation layer is hidden, according to an embodiment of the present invention;

[0020] Figure 4This is a schematic diagram of the structure of the non-stick aluminum channel hidden insulation layer and the silicon nitride combined with silicon carbide ceramic layer according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] Silicon nitride bonded silicon carbide ceramic layer 1;

[0023] Insulation layer 2;

[0024] Snap-fit ​​protrusion 21;

[0025] Support layer 3;

[0026] Tank 31;

[0027] End plate 32;

[0028] Mounting hole 32a;

[0029] Reinforcing plate 33;

[0030] Top plate 34;

[0031] Supporting positioning structure 4. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0033] To address the technical problem that alumina-based aluminum flow channel liners crack under high-temperature impact, this invention provides a non-stick aluminum flow channel that solves the problem of insufficient thermal shock resistance affecting the service life of aluminum flow channels.

[0034] It should be noted that the aluminum flow channel in this utility model is used for, but not limited to, conveying molten aluminum liquid. For ease of explanation, this utility model only uses the application of the non-stick aluminum flow channel to convey molten aluminum liquid as an example. The principle of the non-stick aluminum flow channel in other types of equipment is essentially the same as that in conveying molten aluminum liquid, and will not be elaborated here.

[0035] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a non-stick aluminum flow channel in one embodiment of the present invention. The non-stick aluminum flow channel includes a silicon nitride-bonded silicon carbide ceramic layer 1, a heat insulation layer 2, and a support layer 3 arranged sequentially from the inside to the outside. The silicon nitride-bonded silicon carbide ceramic layer 1 is integrally formed and has a U-shaped cross-section.

[0036] Non-stick aluminum flow channels are mainly used in the aluminum refining and smelting industry. In this application, the inner lining of the non-stick aluminum flow channel is made of silicon nitride-bonded silicon carbide ceramic layer 1. Silicon nitride-bonded silicon carbide ceramic layer 1 has excellent thermal shock resistance and does not wet the molten aluminum, ensuring that the molten aluminum does not adhere after flowing through, facilitating cleaning. Its high surface strength can resist the scouring and corrosion of the molten aluminum, effectively preventing secondary contamination of the molten aluminum during transportation. Furthermore, this material is non-hygroscopic and will not cause gas generation in the molten aluminum; moreover, the silicon nitride-bonded silicon carbide ceramic layer 1 is integrally formed, with no seams on the side conveying the molten aluminum, preventing the molten aluminum from adhering to gaps.

[0037] The insulation layer 2 can effectively reduce heat loss of molten aluminum during the transmission process, maintain the temperature stability of molten aluminum, ensure the fluidity of molten aluminum, and reduce energy consumption.

[0038] It should be understood that the integral molding of silicon nitride-bonded silicon carbide ceramic layer 1 refers to: first preparing the casting material, casting it into the assembled mold, demolding and drying the molded blank, heating the dried blank in a nitriding furnace and holding it at 1100℃ to 1400℃, and then naturally cooling it to room temperature to obtain silicon nitride-bonded silicon carbide ceramic layer 1.

[0039] It should be understood that the insulation layer 2 is cast using a combination of one or more materials selected from silica fiber, high alumina fiber, and calcium silicate board.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, an installation groove is formed on the side of the insulation layer 2 away from the support layer 3, and the silicon nitride bonded silicon carbide ceramic layer 1 is embedded in the installation groove, and the inner wall of the silicon nitride bonded silicon carbide ceramic layer 1 is flush with the inner wall of the insulation layer 2.

[0041] By embedding the silicon nitride-bonded silicon carbide ceramic layer 1 into the mounting groove of the insulation layer 2, the inner wall of the silicon nitride-bonded silicon carbide ceramic layer 1 is flush with the inner wall of the insulation layer 2, thus avoiding the unevenness of the inner wall of the non-stick aluminum flow channel, which would cause impurities to adhere and make cleaning difficult.

[0042] like Figure 2 As shown, in one embodiment, notches are formed on both sides of the silicon nitride-bonded silicon carbide ceramic layer 1, and the insulation layer 2 has a snap-fit ​​protrusion 21 opposite to the notch, the snap-fit ​​protrusion 21 being snapped into the notch.

[0043] By engaging the notch in the silicon nitride-bonded silicon carbide ceramic layer 1 with the snap-fit ​​protrusion 21 of the insulation layer 2, the two layers are further engaged on the basis of the embedded silicon nitride-bonded silicon carbide ceramic layer 1 and the insulation layer 2, thereby enhancing the connection strength between the silicon nitride-bonded silicon carbide ceramic layer 1 and the insulation layer 2.

[0044] like Figure 1 As shown, in one embodiment, the support layer 3 includes a groove 31 and two end plates 32. The groove 31 has a U-shaped cross-section, and the two end plates 32 are disposed at both ends of the groove 31 and are connected to the groove 31. The insulation layer 2 and the silicon nitride bonded silicon carbide ceramic layer 1 are built into the groove 31.

[0045] The combined design of the tank body 31 and the end plate 32 provides strong structural support, ensuring that the flow channel maintains stability and durability when subjected to high-temperature molten aluminum and mechanical stress; the insulation layer 2 is built into the tank body 31 and fits tightly with the tank body 31, reducing heat loss and improving the insulation effect; the standardized design of the tank body 31 and the end plate 32 allows the flow channel to be expanded or modified according to production needs, improving the flexibility of the production line.

[0046] like Figure 2 As shown, in one embodiment, the end plate 32 has a plurality of mounting holes 32a, and the mounting holes 32a on the two end plates 32 are positioned corresponding to each other.

[0047] By opening multiple mounting holes 32a on the end plate 32, multiple non-stick aluminum flow channels can be arranged in sequence. Then, by passing bolts through the end plates 32 of adjacent non-stick aluminum flow channels, the connection between adjacent non-stick aluminum flow channels can be realized. The length of the non-stick aluminum flow channels and the flow direction of the aluminum liquid can be expanded or modified according to production needs.

[0048] like Figure 2 As shown, in one embodiment, the mounting hole 32a is elongated.

[0049] Specifically, the elongated mounting hole 32a provides a wider range of adjustment, allowing the relative position of the end plate 32 to other structural components to be adjusted within a certain range to accommodate different installation requirements and error ranges.

[0050] like Figure 1 As shown, in one embodiment, the support layer 3 further includes a reinforcing plate 33, which is connected to the groove 31 and has two end plates 32 connected to its two ends respectively.

[0051] Specifically, the addition of the reinforcing plate 33 significantly improves the stability of the entire structure, enabling the support layer 3 to maintain its shape and position stability when subjected to external forces; through its connection with the groove 31 and the end plate 32, the reinforcing plate 33 effectively disperses the load and increases the overall load-bearing capacity of the support layer 3; the presence of the reinforcing plate 33 improves the stress distribution inside the support layer 3, reduces stress concentration, and improves the durability of the structure.

[0052] It should be understood that the number of reinforcing plates 33 can be one, two, or three, etc., specifically, as shown in the example. Figure 1As shown, in one embodiment, there are two reinforcing plates 33, which are disposed on the top sides of the groove 31.

[0053] In one embodiment, the support layer 3 further includes a top plate 34, which is disposed above and connected to the reinforcing plate 33, and the top plate 34 extends above the insulation layer 2.

[0054] Specifically, the top plate 34 is located above the reinforcing plate 33, providing additional support for the entire structure and further enhancing the stability and load-bearing capacity of the structure. When a flow channel cover is installed above the aluminum flow channel, the top plate 34 can support the flow channel cover and prevent the pressure of the flow channel cover from acting directly on the insulation layer 2.

[0055] It should be understood that the number of top plates 34 can be one, two, or three, etc., specifically, as shown in the example. Figure 1 As shown, in one embodiment, there are two top plates 34, which are disposed on the top of the trough 31 and spaced apart on both sides of the trough 31.

[0056] In the production of non-stick aluminum flow channels, both the support layer 3 and the silicon nitride-bonded silicon carbide ceramic layer 1 are pre-processed, while the insulation layer 2 is typically formed between the support layer 3 and the silicon nitride-bonded silicon carbide ceramic layer 1 by casting. To achieve the relative positioning and fixation of the spaced-apart support layer 3 and the silicon nitride-bonded silicon carbide ceramic layer 1, therefore, as follows... Figure 3 and Figure 4 As shown, in one embodiment, the non-stick aluminum flow channel further includes a support and positioning structure 4, which is disposed between the silicon nitride-bonded silicon carbide ceramic layer 1 and the support layer 3, and is used to position the silicon nitride-bonded silicon carbide ceramic layer 1.

[0057] By setting a support and positioning structure 4, which connects the silicon nitride-bonded silicon carbide ceramic layer 1 and the support layer 3, the spaced silicon nitride-bonded silicon carbide ceramic layer 1 and the support layer 3 can be connected and positioned, thus preventing the position of the silicon nitride-bonded silicon carbide ceramic layer 1 from shifting when the insulation layer 2 is formed by casting.

[0058] It should be understood that the support positioning structure 4 can be embedded in the insulation layer 2 or placed outside the insulation layer 2.

[0059] It should be understood that the supporting and positioning structure 4 can be a bracket, connecting rod, etc., that adhesively connects the silicon nitride-bonded silicon carbide ceramic layer 1 and the supporting layer 3. Specifically, for example... Figure 3 and Figure 4 As shown, in one embodiment, the support positioning structure 4 is connected to the support layer 3 and has a positioning groove that matches the outer wall of the silicon nitride bonded silicon carbide ceramic layer 1.

[0060] By connecting the support positioning structure 4 to the support layer 3, the support positioning structure 4 and the support layer 3 are fixed. Specifically, the support positioning structure 4 is connected to the groove 31. By forming a positioning groove on the support positioning structure 4, the silicon nitride bonded silicon carbide ceramic layer 1 can be supported and positioned.

[0061] It should be understood that the supporting positioning structure 4 can be formed by welding, splicing or other methods using profiles, plates, rods or blocks.

[0062] It should be understood that the supporting positioning structure 4 and the groove 31 can be connected by means of bonding, welding, etc., specifically, such as Figure 3 and Figure 4 As shown, in one embodiment, the cross-section of the tank 31 is U-shaped, the outer wall of the support and positioning structure 4 matches the inner wall of the tank 31, and the support and positioning structure 4 is fixed to the inner wall of the tank 31 by welding.

[0063] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A non-stick aluminum flow channel, characterized in that, include: The silicon nitride-bonded silicon carbide ceramic layer, the heat insulation layer, and the support layer are arranged sequentially from the inside to the outside. The silicon nitride-bonded silicon carbide ceramic layer is integrally formed and has a U-shaped cross-section. The support layer includes a groove and two end plates. The groove has a U-shaped cross-section. The two end plates are located at both ends of the groove and are connected to the groove. The insulation layer and the silicon nitride-bonded silicon carbide ceramic layer are embedded in the groove.

2. The non-stick aluminum flow channel according to claim 1, characterized in that: The insulation layer has an installation groove on the side opposite to the support layer. The silicon nitride-bonded silicon carbide ceramic layer is embedded in the installation groove, and the inner wall of the silicon nitride-bonded silicon carbide ceramic layer is flush with the inner wall of the insulation layer.

3. The non-stick aluminum flow channel according to claim 2, characterized in that: The silicon nitride-bonded silicon carbide ceramic layer has notches on both sides, and the insulation layer has snap-fit ​​protrusions relative to the notches, the snap-fit ​​protrusions being snapped into the notches.

4. The non-stick aluminum flow channel according to claim 1, characterized in that: The end plate has multiple mounting holes, and the mounting holes on two end plates are positioned correspondingly.

5. The non-stick aluminum flow channel according to claim 4, characterized in that: The mounting hole is elongated.

6. The non-stick aluminum flow channel according to claim 1, characterized in that: The support layer also includes a reinforcing plate, which is connected to the groove and has two end plates connected to its two ends respectively.

7. The non-stick aluminum flow channel according to claim 6, characterized in that: The support layer also includes a top plate, which is disposed above the reinforcing plate and connected to the reinforcing plate, with a portion of the top plate extending above the insulation layer.

8. The non-stick aluminum flow channel according to claim 1, characterized in that: It also includes a support and positioning structure, which is disposed between the silicon nitride-bonded silicon carbide ceramic layer and the support layer, for positioning the silicon nitride-bonded silicon carbide ceramic layer.

9. The non-stick aluminum flow channel according to claim 8, characterized in that: The support positioning structure is connected to the support layer and has a positioning groove that matches the outer wall of the silicon nitride bonded silicon carbide ceramic layer.

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