IMPURITY SEPARATION METHOD, IMPURITY SEPARATION DEVICE, AND CONTINUOUS CASTING METHOD

WIPO Patent Application WO/2012/090843

A1

An impurity separation method comprising: mounting an impurity separation device in a molten aluminum alloy, the device being provided with a flow path having a cross-sectional area less than that of the upstream and downstream flow paths of the molten metal, and greater than that of the impurities to be separated out; and passing the molten metal through the flow path formed inside the impurity separation device, whereby the impurities are separated from the molten metal by using the wall surfaces of the impurity separation device. Also, the impurity separation device has a first wall surface and a second wall surface. The first wall surface includes a flow path having a cross-sectional area smaller less than that of the upstream and downstream flow paths of the molten metal, and greater than that of the impurities to be separated out when installed inside the flow path of molten aluminum alloy. The second wall surface is a surface transversely dividing the flow path of the molten metal on the upstream side when installed inside the flow path of the molten metal.

FUKUDA MASASHI (JP)
KIMURA YOSHIFUMI (JP)
KAWAGUCHI ATSUKO (JP)

PCT/JP2011/079746

July 05, 2012

December 21, 2011

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SHOWA DENKO KK (JP)
FUKUDA MASASHI (JP)
KIMURA YOSHIFUMI (JP)
KAWAGUCHI ATSUKO (JP)

B22D11/119; B22D11/00; C22B9/02; C22B21/06

JPH03281740A	1991-12-12
JPH07207355A	1995-08-08
JPH09235629A	1997-09-09
JPH05337637A	1993-12-21
JPH08141708A	1996-06-04
JPH0550193A	1993-03-02

YAMADA, TAKEHIKO (JP)
Takehiko Yamada (JP)

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