METAL REMOVAL METHOD AND METAL RECOVERY METHOD

WIPO Patent Application WO/2021/145293

A1

An object is to provide a method with which Mg can be efficiently removed from an aluminum alloy melt whose raw material is scrap or the like. The metal removal method of the present invention includes a processing step of forming a molten salt layer in contact with an aluminum alloy melt containing Mg which covers at least a part of the surface of the aluminum alloy melt. This method allows Mg to be taken in from the aluminum alloy melt to the molten salt layer and removed. The molten salt layer contains a specific halogen element that is one or more of Cl or Br and a specific metal element that is one or more of Cu, Zn, or Mn. The specific metal element is preferably supplied as an oxide of the specific metal element to the molten salt layer. At that time, the molten salt layer preferably contains Mg. The step of removing Mg is preferably performed by disposing a conductor that bridges the aluminum alloy melt and the molten salt layer. This can enhance the Mg removal efficiency and the recovery efficiency of the specific metal element.

MINOURA TAKUMA (JP)
YAOKAWA JUN (JP)
HIBI KAZUMA (JP)
KAWAHARA HIROSHI (JP)
IWATA YASUSHI (JP)
ISHII HIROYUKI (JP)
KANO AKIRA (JP)
KUSAKA YUSEI (JP)
ITO KYOSUKE (JP)
MURATA TOMOO (JP)

PCT/JP2021/000594

July 22, 2021

January 11, 2021

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TOYOTA CHUO KENKYUSHO KK (JP)
TOYOTA TSUSHO CORP (JP)

C22B21/04; C22B21/06; C22B26/22

SU1008261A1	1983-03-30
JP2008050637A	2008-03-06
JPS5959846A	1984-04-05
CN103740948A	2014-04-23
US4183745A	1980-01-15
US4097270A	1978-06-27
JP2007154268A	2007-06-21
JP2008050637A	2008-03-06
JP2011168830A	2011-09-01

JOURNAL OF JAPAN INSTITUTE OF LIGHT METALS, vol. 33, 1983, pages 243 - 248
JOURNAL OF JAPAN INSTITUTE OF LIGHT METALS, vol. 54, 2004, pages 75 - 81

MORIOKA Masayuki et al. (JP)

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