Additive for aluminum alloy fusant and addition method thereof

Abstract

The invention relates to an additive for removing magnesium of aluminum alloy fusant and an addition method thereof. The addition method comprises the following steps of: appropriately screening natural silica sand serving as a raw material to obtain a silica sand additive, melting aluminum alloy by heating under atmospheric environment to obtain aluminum fusant, and keeping the temperature of the aluminum fusant at 750 DEG C; and adding the silica sand additive which is 7 percent of the total mass of the aluminum fusant into the aluminum fusant and stirring for 6 minutes to remove generated scruffs, wherein the step of adding the silica sand additive can be repeated from multiple times so as to reduce the magnesium content of the aluminum alloy fusant further. In the method, the silica sand additive is low in cost, abundant in reserves, safe, innocent and pollution-free, can effectively remove Mg of the aluminum alloy fusant to recover waste and wasted aluminum alloy, and greatly saves social resources and energy sources, thereby having wide application prospect and application value.

Description

technical field [0001] The invention relates to an additive for magnesium removal from aluminum alloy melts and an adding method thereof, in particular to an additive suitable for magnesium removal from cast aluminum alloy melts and an adding method thereof. Background technique [0002] Cast aluminum alloy has been widely used in aviation, aerospace, automobile, machinery, electronics and other fields due to its low density, high specific strength, good plasticity, good electrical and thermal conductivity, good corrosion resistance, rich resources, and easy processing. Among conventional industrial materials, aluminum has a very high recycling value. According to reports, the energy consumption of producing recycled aluminum ingots is only equivalent to 3% of the energy consumption of producing primary new aluminum ingots. Therefore, from the perspectives of saving resources and energy, protecting the environment, and reducing the cost of casting aluminum alloys, the use of...

AI Technical Summary

Problems solved by technology

Although chlorine gas has an excellent purification effect on the removal of magnesium from the melt, and also has other effects such as hydrogen removal, but on the one hand, chlorine gas is a highly toxic gas, and it can also form HCl with water vapor, which is very harmful to the human body and pollutes the human body. Environment, corrosion equipment, and easy to make the crystal structure of aluminum alloy ingots coarse; on the other hand, magnesium chloride slag needs to be specially treated, which not only increases the cost but also is not conducive to the recovery of valuable magnesium

In addition to the chlorine gas method, methods such as adding purifiers to the melt are commonly used, but these methods have not received as much attention and application as the chlorine gas method, and have not shown obvious effects