High temperature modification treatment method of electrolytic aluminium liquid

Abstract

The pyrometamorphism treatment method to add mixed rare-earth with Ce as main into the high-temperature electrolytic aluminum solution can improve the fused mass inner structure effectively, eliminates the low-strength on high-temperature phenomena, further improves the crystallization behavior, has important meaning for casting high-performance aluminum alloy, and thereby brings great economic and social benefits.

Description

technical field [0001] The invention relates to electrolytic aluminum processing, in particular to a method for modifying electrolytic aluminum liquid at high temperature, and belongs to the technical field of nonferrous metal processing. Background technique [0002] Electrolytic aluminum processing is an important industry in the field of non-ferrous metal processing. During the production of electrolytic aluminum, the temperature of the electrolytic aluminum solution in the electrolytic cell is generally above 940°C, and in severe cases exceeds 1000°C. The electrolytic aluminum liquid is in a high temperature state for a long time. Compared with the low superheated melt, the free volume inside the melt increases, resulting in a very serious melt gas absorption phenomenon; at the same time, the severe overburning of the melt makes the arrangement of atoms in the aluminum liquid Both the mode and the degree of order change, resulting in a loose structure. In this way, the...

AI Technical Summary

Problems solved by technology

The electrolytic aluminum liquid is in a high temperature state for a long time. Compared with the low superheated melt, the free volume inside the melt increases, resulting in a very serious melt gas absorption phenomenon; at the same time, the severe overburning of the melt makes the arrangement of atoms in the aluminum liquid Both the mode and the degree of order change, resulting in a loose structure

In this way, the electrolytic aluminum liquid lacks nucleation particles during the solidification process, resulting in serious loosening of the ingot, and the ingot is prone to cracking during processing and deformation, which affects the quality of the product.