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Extracting method and extracting device for high purity aluminum

An extraction method and high-purity technology, which is applied in the production of refined aluminum products with a purity above 3N, can solve the problems of complicated operation process and difficult control of pure aluminum crystallization, and achieve good separation effect, energy saving and convenient operation

Active Publication Date: 2012-07-18
ALNAN ALUMINIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] However, the fractional crystallization method described above needs to use a ring plunger, the operation process is more complicated, and it is not easy to control the crystallization of pure aluminum.

Method used

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  • Extracting method and extracting device for high purity aluminum
  • Extracting method and extracting device for high purity aluminum
  • Extracting method and extracting device for high purity aluminum

Examples

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Effect test

Embodiment 1

[0046] Put the molten aluminum ingot containing Si, Fe, Cu, Pb, Zn, Ca, Ti, Cd, Ag, In and other elements into the vacuum heater and heat it to 690-700°C to obtain aluminum liquid, which contains the injection level In the middle of the crystallizer, crystallization occurs at a temperature of 670°C-680°C. After crystallization, the pure aluminum settles in the lower part of the primary crystallizer due to its high density. The temperature of the molten aluminum with impurities above the crystallizer is still above the melting point, floating above the primary crystallizer, and sent to the secondary crystallizer to continue crystallization, the same crystallized pure aluminum settles in the lower part of the secondary crystallizer, and the aluminum liquid containing impurities floats above the secondary crystallizer, and Sent to the three-stage crystallizer, through the three-stage or four-stage crystallizer, the aluminum liquid containing more impurities is sent to the impurity...

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Abstract

An extracting method for high purity aluminum adopts an improved fractional crystallization method. The method includes that molten aluminum is injected into the middle of a primary crystallizer, under a stirring condition, pure aluminum enters a secondary crystallizer from a molten aluminum outlet inclined tube of the primary crystallizer, secondary crystallization is conducted continuously, and third-stage crystallization and fourth-stage crystallization or multi-stage crystallization are conducted till pure aluminum products with purity higher than 99.9995% are obtained. The pure aluminum products are sent to a following production line to be manufactured into high-end aluminum products. Molten aluminum containing impurities can return to a previous-level crystallizer to be purified again. The method is good in pure aluminum separation effect, does not need to melt and heat aluminum bars again, and is low in energy consumption and easy to operate.

Description

technical field [0001] The invention belongs to aluminum smelting and purification technology, in particular to a method for producing refined aluminum products with a purity above 3N. Background technique [0002] my country is a big country in the aluminum industry, and the output of electrolytic aluminum ranks among the top in the world, but most of high-purity aluminum (aluminum products with a purity above 3N) relies on imports. Although domestic research on this aspect began in the 1980s, but The improvement of the production process is only applicable to the production of aluminum products with a purity lower than 3N, and the research on the production process of 3N high-purity aluminum is relatively slow. As we all know, high-purity aluminum is widely used in low-temperature electrical technology, electronic industry and electronic computer, astronomical telescope, petrochemical, atomic energy, radar, aerospace, electric vehicles and semiconductor industries, and its ...

Claims

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Application Information

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IPC IPC(8): C22B21/06
Inventor 郑玉林
Owner ALNAN ALUMINIUM CO LTD
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