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CN-121993434-A - Composite connecting piece for aluminum alloy scrap recycling aluminum melting furnace

CN121993434ACN 121993434 ACN121993434 ACN 121993434ACN-121993434-A

Abstract

The invention discloses a composite connecting piece for an aluminum alloy scrap recycling aluminum melting furnace, and relates to the technical field of aluminum alloy recycling equipment. The high-strength graphite impeller is of a multi-layer composite structure, and comprises an inner layer which is made of high-strength metal and is connected between a graphite impeller and a vortex device, an outer layer which is made of inorganic nonmetallic materials and is used for guaranteeing aluminum liquid corrosion resistance and abrasion resistance, a transition layer which is filled between the inner layer and the outer layer and is used for enhancing the binding force between the inner layer and the outer layer, and a top end sealing structure which is made of high-temperature resistant castable and is used for sealing metal parts assembled between the inner layer and the graphite impeller and preventing aluminum liquid from leaking and corroding. The manufacturing comprises the steps of inner layer processing, composite assembly, port sealing and air drying. The product of the invention has the advantages of high strength and low cost, greatly prolongs the service life, has lower manufacturing cost than a silicon nitride integrated part, and can be suitable for more than 90% of aluminum alloy scraps recycling scenes.

Inventors

  • TANG JIANQUN

Assignees

  • 秦皇岛凯仁机械设备有限公司

Dates

Publication Date
20260508
Application Date
20260303

Claims (10)

  1. 1. A composite connecting piece for an aluminum alloy scrap recycling aluminum melting furnace is characterized by comprising an inner layer, an outer layer, an intermediate transition layer and a top end sealing structure, wherein the inner layer is made of high-strength metal and is connected between a graphite impeller and an eddy current device and is used for bearing main load torsion, the outer layer is made of inorganic nonmetallic materials and is used for guaranteeing aluminum liquid corrosion and abrasion resistance, the intermediate transition layer is filled between the inner layer and the outer layer and is used for enhancing the binding force between the inner layer and the outer layer, and the top end sealing structure is made of high-temperature resistant castable and is used for sealing metal parts assembled by the inner layer and the graphite impeller and preventing leakage corrosion of aluminum liquid.
  2. 2. The composite connection for an aluminum scrap recovery melting furnace of claim 1 wherein the high strength metal is H13 die steel.
  3. 3. The composite connection for an aluminum scrap recovery melting furnace of claim 1 wherein the inorganic nonmetallic material is silicon nitride.
  4. 4. The composite connector for an aluminum alloy scrap recycling aluminum melting furnace according to claim 1, wherein the intermediate transition layer is high-temperature-resistant heat-insulating cotton.
  5. 5. The composite connecting piece for an aluminum alloy scrap recycling aluminum melting furnace according to claim 1, wherein the middle transition layer is light high-temperature-resistant heat-insulating cotton, and the composite connection of the inner layer and the outer layer is realized in a filling mode.
  6. 6. The composite connection for an aluminum scrap recovery melting furnace of claim 1 wherein the high temperature resistant castable molded ports of the top end closure remain flat.
  7. 7. A method of manufacturing a composite joint for an aluminum scrap recovery melting furnace according to any one of claims 1-6, comprising the steps of: step S1, processing inner metal, processing internal and external threads at two ends of the inner metal, and ensuring the assembly dimensional accuracy; S2, placing the inner layer treated in the step S1 in the central part of the outer inorganic nonmetallic sleeve, and filling high-temperature-resistant heat-insulating cotton between the inner layer and the outer inorganic nonmetallic sleeve to form an intermediate transition layer so as to enable the inner layer and the outer layer to be combined in a compound way; s3, sealing the top end of the composite structure by adopting high-temperature resistant castable to ensure the port to be flat; And S4, air-drying the finished product processed in the step S3 to obtain the composite connecting piece.
  8. 8. The method for manufacturing a composite connection member for an aluminum alloy scrap recycling aluminum melting furnace according to claim 7, wherein the inner metal in step S1 is H13 die steel, and suitability for threaded connection is ensured after processing.
  9. 9. The method of manufacturing a composite joint for an aluminum scrap recovery melting furnace in accordance with claim 7, wherein said outer inorganic nonmetallic jacket in step S2 is a silicon nitride jacket.
  10. 10. The method for manufacturing a composite connection member for an aluminum alloy scrap recycling aluminum melting furnace according to claim 7, wherein the high temperature resistant insulation cotton in step S2 is light insulation cotton, and no gap is ensured between the inner layer and the outer layer inorganic nonmetallic sleeve during filling.

Description

Composite connecting piece for aluminum alloy scrap recycling aluminum melting furnace Technical Field The invention relates to the technical field of aluminum alloy recovery equipment, in particular to a composite connecting piece for an aluminum alloy scrap recovery aluminum melting furnace. Background With the rapid development of the automobile industry and the increasing environmental protection requirements, light weight is one of the core development directions of the automobile manufacturing industry. Aluminum alloy has high strength and light weight, and is widely used for manufacturing parts such as a steering bracket, a chassis, a hub, an engine housing, and a vehicle body of an automobile. In order to reduce the production cost and practice the low-carbon development concept, the recovery of aluminum scraps and waste materials generated in the processing process of aluminum products has become an indispensable production procedure. The aluminum scrap melting furnace is a key device for recycling aluminum scraps, and an internal vortex device is a core component. The lower end of the vortex device is provided with a graphite impeller with the diameter of 440mm, and the impeller is immersed in aluminum liquid after being connected with the vortex device, and is driven to rotate by the vortex device. Because the connecting piece needs to be soaked in the aluminum liquid for a long time and cannot influence chemical components of the aluminum liquid, the connecting piece for connecting the graphite impeller and the vortex device in the prior art is generally made of graphite materials. However, the existing graphite connecting piece has the remarkable defects of poor corrosion resistance, long normal service life of about one week when the existing graphite connecting piece is continuously used in high-temperature aluminum liquid at 700 ℃, frequent replacement of operators in a high-temperature environment after abrasion is needed, labor intensity is high, equipment is stopped in the replacement process, and production efficiency is seriously affected. Therefore, the development of the composite connecting piece for the aluminum alloy scrap recycling aluminum melting furnace, which has the advantages of corrosion resistance, high strength and controllable cost, becomes a technical problem to be solved in the aluminum alloy scrap recycling industry. Disclosure of Invention In view of the above, the present invention aims to overcome the shortcomings of the prior art, and provides a composite connecting piece for an aluminum alloy scrap recycling aluminum melting furnace and a manufacturing method thereof, which achieve the combination of aluminum liquid corrosion resistance, abrasion resistance, high strength and low cost. In order to achieve the above purpose, the invention adopts the following technical scheme: A composite connecting piece for an aluminum alloy scrap recycling aluminum melting furnace comprises an inner layer, an outer layer, an intermediate transition layer and a top end sealing structure, wherein the inner layer is made of high-strength metal and is connected between a graphite impeller and an eddy current device and used for bearing main load torsion, the outer layer is made of inorganic nonmetallic materials and used for guaranteeing aluminum liquid corrosion resistance and abrasion resistance, the intermediate transition layer is filled between the inner layer and the outer layer and used for enhancing the binding force between the inner layer and the outer layer, and the top end sealing structure is made of high-temperature resistant castable and used for sealing metal parts assembled by the inner layer and the graphite impeller and preventing leakage corrosion of aluminum liquid. Preferably, the high strength metal is H13 die steel. Preferably, the inorganic nonmetallic material is silicon nitride. Preferably, the intermediate transition layer is high-temperature-resistant heat-insulating cotton. Preferably, the middle transition layer is light high-temperature-resistant heat-insulating cotton, and the inner layer and the outer layer are in composite connection in a filling mode. Preferably, the port of the high-temperature resistant castable with the closed top end structure is kept flat after being molded. Another object of the present invention is to provide a method for manufacturing the composite connection member for an aluminum alloy scrap recycling aluminum melting furnace, comprising the steps of: step S1, processing inner metal, processing internal and external threads at two ends of the inner metal, and ensuring the assembly dimensional accuracy; S2, placing the inner layer treated in the step S1 in the central part of the outer inorganic nonmetallic sleeve, and filling high-temperature-resistant heat-insulating cotton between the inner layer and the outer inorganic nonmetallic sleeve to form an intermediate transition layer so as to enable the inner layer and the