Method for preparing rare-earth aluminum silicon alloy by waste aluminum recovery and rare-earth aluminum silicon alloy thereof

Abstract

The invention discloses a method for preparing rare earth aluminum silicon alloy through recovery of waste aluminum and the rare earth aluminum silicon alloy thereof, which belong to the technical field of alloy preparation. The method comprises the following steps: the waste aluminum is pre-treated and separately cast into waste aluminum ingots; and the aluminum silicon alloy is cast after melting pure aluminum and the waste aluminum ingots for 7 to 8 hours at a temperature of between 700 and 720 DEG C in the presence of silicon copper interalloy and rare earth alloy according to the fact that the ratio of the pure aluminum to the waste aluminum ingots is 20-25 percent to 75-80 percent. The method takes the waste aluminum as a raw material and the pure aluminum as an auxiliary material, reforms and innovates the technological flow before and after the melting, and also adds other adequate elements and rare earth metal, thereby improving the regeneration of waste materials on one handand greatly reducing the usage of chemical flux on the other hand, reducing the cost, improving the product quality, greatly eliminating the discharge of waste gas, and being favorable for environment-friendly production.

Description

technical field [0001] The invention relates to an aluminum-silicon alloy, in particular to a method for preparing a rare-earth aluminum-silicon alloy by recycling waste aluminum and the rare-earth aluminum-silicon alloy. Mainly used in automobile, motorcycle parts, export machinery parts and other industries. Background technique [0002] In recent years, China's aluminum processing industry has developed rapidly, and aluminum-silicon alloys are widely used in various industries of the national economy due to their excellent performance. At present, there are two main methods for the production of aluminum-silicon alloys: (1) primary aluminum smelting and alloying; (2) ) recycling of waste aluminum alloys. The energy consumption of waste aluminum recycling is low, the energy consumption is only 5% of the production of primary aluminum, the recovery rate is high, and it can be recycled many times. Moreover, the production investment of recycled aluminum is small, and the p...

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Problems solved by technology

[0003] 1. The sorting, batching and smelting process is simple, and the composition detection and quality control methods are not yet perfect. Some enterprises only judge whether the product is qualified by the surface quality and fracture morphology of the aluminum ingot, and the production metallurgical quality is unstable. A considerable number of enterprises only Can produce several cast aluminum alloys with low added value, such as sub-brand ZL102, etc.

[0004] 2. The waste aluminum recycling process consumes a lot of energy, and the harmful gas and waste slag generated in the recycling process of waste aluminum bring about environmental problems

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