[China Aluminum Industry Net] Aluminum Scrap Recycling When cutting aluminum, the chips account for about 20% of the weight of the casting, up to about 30%. At present, the aluminum price on the market is about 15,000 yuan/ton, so the aluminum scraps in the machining process of piston products can reduce the production cost and have good economic benefits. Aluminum scrap recycling work should pay attention to the following points: (1) When a certain material grade of the workpiece is processed, it should be promptly received by the country to prevent aluminum scraping. During recycling, aluminum scraps in the chassis of various machine tools that participate in cutting should be cleaned. (2) Aluminum scraps to be recycled should be stacked strictly in the specified bins of the storage yard according to the classification of the grades, and the aluminum scraps should be marked. The type of brand, when conditions are met, should be remelted in time to avoid mixing numbers. (3) It should be avoided that dust, such as sediment and cotton yarn, is mixed with aluminum chips.
The smelting method of aluminum swarf generally has two kinds: (1) Two smelting methods: The first time the aluminum swarf is melted into ingots (recovery ingots) and stacked according to their chemical composition; the second smelting will match the regrowth ingots. Into the furnace melting finished product. (2) Direct addition method: When using this method, the aluminum chips can be directly baked in the furnace (using the waste heat or the bottom temperature), and after the aluminum chips are dried, the temperature is increased to melt and added to the various materials. The main and auxiliary materials are smelted. Compared with the two methods, twice smelting, power consumption and elemental burning are larger. The management work is cumbersome and wastes manpower and material resources. The second method is only applicable to the continuous production of a brand of aluminum castings. In the same period of production of multi-god brand aluminum, the use of the first method is more applicable.
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