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A method for semi-continuous casting of high-purity aluminum ingots using a fine-grain crystallizer

A mold, semi-continuous technology, applied in the field of non-ferrous metal casting, can solve the problems of affecting the purity of high-purity aluminum ingots, high energy consumption, and high casting costs, and achieve fine structure, avoid wide range, and total axis. height shortening effect

Active Publication Date: 2017-07-28
CHINA NON-FERROUS METALS PROCESSING TECH CO LTD
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Problems solved by technology

However, the design of this crystallizer is too complicated, and the electromagnetic field needs to be continuously applied during the casting process, which consumes a lot of energy. Inside the ingot, which affects the purity of the high-purity aluminum ingot, and the casting cost is higher

Method used

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  • A method for semi-continuous casting of high-purity aluminum ingots using a fine-grain crystallizer
  • A method for semi-continuous casting of high-purity aluminum ingots using a fine-grain crystallizer

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Embodiment Construction

[0026] The present invention is a method for semi-continuously casting high-purity aluminum ingots using a fine-grain crystallizer. The high-purity aluminum ingots obtained by the present invention can be used as anode foils for electrolytic capacitors, lead wires for capacitors, and integrated circuits. Wires, base materials for vacuum evaporators, stable conductors for superconductors, base materials for disk alloys and aluminum alloys with high fracture toughness, etc., are widely used.

[0027] In the method of the present invention, a fine-grain crystallizer is used, and the high-purity aluminum ingot is either a round ingot, a flat ingot, or a square ingot. The design size of the round ingot is ΦD, and the design size of the flat ingot is D×d, D>d, the design size of the square ingot is D×D, the structure of the fine-grain crystallizer used in the round ingot, the flat ingot and the square ingot is different, but the fine-grain crystallization All contain shunt cover 2, ...

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Abstract

The invention discloses a method for semicontinuously casting a high purity aluminum cast ingot through a fine grain crystallizer. The adopted fine grain crystallizer comprises a diversion cover, a body, a water deflector and a lower cover plate. The center of the body is sequentially provided with a concave annular groove, a primary cooling crystalline region and an ingot discharge region from top to bottom. The diversion cover is fixed to the upper end of the body through a bolt. The lower cover plate is fixed to the lower end of the body through a bolt. The water deflector is clamped into an annular groove of the body and the lower cover plate to be assembled to be the fine grain crystallizer. The total axis height of the fine grain crystallizer is effectively shortened. The primary cooling crystalline region and the ingot discharge region in the body form a secondary distribution mechanism, and the whole aluminum cast ingot forms a negative temperature gradient region for promoting isometric crystal production, so that isometric form production of free crystalline grains is achieved, the defects that the internal high-temperature region range is wide, free crystalline grains are remolten, and crystal nucleuses cannot achieve isometric form growth in traditional crystallizer design are avoided, and refining of the microscopic structure of the high purity aluminum cast ingot can be achieved.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal casting, in particular to a method for semi-continuously casting high-purity aluminum ingots using a fine-grain crystallizer. Background technique [0002] High-purity aluminum or ultra-high-purity aluminum has lower content of impurity elements than industrial pure aluminum, so it has better conductivity, ductility, reflectivity and corrosion resistance than industrial pure aluminum. It is used in the electronics industry and aerospace, etc. The field has a wider range of uses, such as the maximum content of each impurity in 5N5-6N ultra-high-purity aluminum does not exceed 0.4ppm, so it can be used in the semiconductor device manufacturing industry and can also be used to prepare superconducting cables. [0003] With the improvement of the application performance of high-purity aluminum products and the gradual expansion of the application field, higher requirements are put forward for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/04B22D11/07
CPCB22D11/003B22D11/04B22D11/07
Inventor 长海博文郭世杰刘金炎陈丹丹余康才王雏艳谷宁杰
Owner CHINA NON-FERROUS METALS PROCESSING TECH CO LTD
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