Understand the production process of industrial aluminum

1. Casting is the first process of aluminum production. The main process is: 　　　　 (1) Ingredients: According to the specific alloy grades to be produced, calculate the addition amount of various alloy components, and reasonably match various raw materials.　　　　 (2) Smelting: The prepared raw materials are added to the smelting furnace to melt according to the process requirements, and the slag and gas in the melt are effectively removed by degassing and slagging refining methods.　　　　 (3) Casting: The molten aluminum is cooled and casted into round casting rods of various specifications under certain casting process conditions through a deep well casting system.　　　　 2. Extrusion: Extrusion is a means of profile forming. First, design and manufacture a mold according to the section of the profile product, and use an industrial aluminum profile profile extruder to extrude the heated round cast rod from the mold. Commonly used grade 6063 alloy, during extrusion, an air-cooling quenching process and subsequent artificial aging process are used to complete the heat treatment strengthening. Different grades of heat-treatable and strengthened alloys have different heat treatment systems. 3. Coloring (the process of oxidation is mainly discussed here) 　　　　oxidation: the extruded aluminum alloy profile has a weak surface corrosion resistance, so it must be surface treated by anodizing to increase the corrosion resistance and wear resistance of the aluminum material Sexuality and aesthetics of appearance. The main process of 　　　　 is: 　　　　 (1) Surface pretreatment: The surface of the profile is cleaned by chemical or physical methods, and the pure substrate is exposed, in order to obtain a complete and dense artificial oxide film. It is also possible to obtain a mirror or matte (matt) surface by mechanical means.　　　　 (2) Anodizing: The surface pretreatment of the profile, under certain process conditions, the surface of the substrate will be anodized to form a dense, porous, and strong adsorption AL203 film.　　　　 (3) Hole sealing: sealing the pores of the porous oxide film formed after anodization to enhance the anti-pollution, corrosion resistance and wear resistance of the oxide film. The oxide film is colorless and transparent. Using the strong adsorption of the oxide film before sealing, some metal salts can be adsorbed and deposited in the film pores, which can make the appearance of the profile show many colors other than the natural color (silver white), such as: black, bronze, Golden yellow and stainless steel color, etc. ————The article comes from the Internet. If there is any infringement, please contact to delete it.
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