Device and process for removing iron and silicon phases in primary aluminum-silicon alloy in one step

Abstract

The invention discloses a device and a process of removing iron and silicon phases in a primary aluminum-silicon alloy by means of a one-step method. The process comprises the following steps: adopting a metal element manganese as an iron removing agent under the action of an alternating electromagnetic field; mixing the iron removing agent with a primary aluminum-silicon alloy raw material uniformly; heating and melting the mixture, wherein the silicon phase and the iron-enriched phase are solidified and enriched in the bottom under the joint action of a magnetic field force and temperature effect after cooling; pouring the melt in the upper portion; carrying out cooling and solidification on the melt to obtain a casting aluminum-silicon alloy meting the industrial standards; and finally,re-melting the primary silicon phase and the impure iron phase in the bottom to obtain a bottom alloy melt. Compared with a conventional natural precipitation method, the iron removal rate which is only 60% or above, the process disclosed by the invention is simple and rapid in flow of preparing the casting aluminum-silicon alloy, energy-saving and environment-friendly and low in production cost;the iron removal rate reaches up to 92%; and the silicon content of the obtained product is as small as 13% or below and the iron content of the obtained product is as small as 0.39% or below.

Description

technical field [0001] The invention relates to a device and process for removing iron and silicon phases in a primary aluminum-silicon alloy produced by an industrial electrothermal reduction method based on an alternating electromagnetic field with a high-efficiency one-step method, so that the primary aluminum-silicon alloy is separated into an iron-containing primary silicon phase and a eutectic Aluminum-silicon alloy, and the content of iron and silicon in the eutectic aluminum-silicon alloy has reached the qualified standard of casting aluminum-silicon alloy, which belongs to the field of electromagnetic metallurgy. Background technique [0002] Cast aluminum-silicon alloys have good mechanical properties and casting properties. Researchers have been working on the composition and structure of cast aluminum-silicon alloys to continuously improve their comprehensive properties to meet the needs of actual production and life. Adding various composite elements to aluminum...

AI Technical Summary

Problems solved by technology

However, the efficiency of traditional natural sedimentation method for removing iron is low, the time is long, and it cannot meet the requirements of reducing the silicon content in the alloy at the same time.

Therefore, in terms of improving the performance of cast aluminum-silicon alloys, the single natural sedimentation method cannot achieve the optimum efficiency

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