High temperature modification treatment method of electrolytic aluminium liquid

A technology of electrolytic aluminum liquid and high-temperature metamorphism, which is applied in the field of electrolytic aluminum processing and electrolytic aluminum liquid metamorphism treatment at high temperature, which can solve the problems of changes in atomic arrangement and order degree, easy cracking of cast ingots, and increase in free volume. , to achieve huge economic and social benefits, improve the internal structure of the melt, and simple and practical purification process

Inactive Publication Date: 2006-07-19
苏州有色金属研究院有限公司
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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

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Embodiment Construction

[0013] For a long time, there has been a very troublesome problem in the production process of electrolytic aluminum, that is: the electrolytic aluminum liquid in the electrolytic cell is kept at high temperature for a long time, which leads to changes in the physical properties of the melt, which affects the quality of the ingot and even the final product . For this reason, people have tried various measures, all do not play good effect.

[0014] After careful research and analysis, and through a large number of practical tests, the inventor of the present application proposed that high-temperature metamorphism treatment of electrolytic aluminum solution can well solve the above-mentioned technical problems. Its main technical measures are: adding rare earth to the electrolytic aluminum liquid before cooling and refining and ingot casting, and performing high-temperature metamorphic treatment on the electrolytic aluminum liquid.

[0015] In a specific embodiment of the prese...

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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...

Claims

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Application Information

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IPC IPC(8): C25C3/24
Inventor 孙德勤高健曹春燕
Owner 苏州有色金属研究院有限公司
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