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Title:
Al ALLOY RECOVERY METHOD
Document Type and Number:
WIPO Patent Application WO/2019/077892
Kind Code:
A1
Abstract:
Provided is an Al alloy recovery method capable of producing a recovered Al alloy (molten metal), in which Fe concentration and Si concentration are efficiently reduced, while using scraps of Al alloy castings and the like as raw materials. The present invention is an Al alloy recovery method involving: a preparation step for preparing a first molten metal having a hypereutectic composition of Cu and Si by melting an Al alloy raw material; a holding step for holding the first molten metal at a separation temperature at which Si and Fe compounds crystalize; and an extraction step for extracting a second molten metal obtained by removing at least part of unmelted solids such as iron scraps or crystalized Si and Fe compounds from the first molten metal. According to this recovery method, the crystallized Si and Fe compounds can be easily separated, and the molten metal of recovered Al alloy with low concentrations of Fe and Si can be efficiently obtained.

Inventors:
MINOURA Takuma (41-1 Yokomichi, Nagakute-sh, Aichi 92, 〒4801192, JP)
YAOKAWA Jun (41-1 Yokomichi, Nagakute-sh, Aichi 92, 〒4801192, JP)
IWATA Yasushi (41-1 Yokomichi, Nagakute-sh, Aichi 92, 〒4801192, JP)
KAWAHARA Hiroshi (41-1 Yokomichi, Nagakute-sh, Aichi 92, 〒4801192, JP)
HIBI Kazuma (41-1 Yokomichi, Nagakute-sh, Aichi 92, 〒4801192, JP)
UENO Noriyuki (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
Application Number:
JP2018/032281
Publication Date:
April 25, 2019
Filing Date:
August 31, 2018
Export Citation:
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Assignee:
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO (41-1, Yokomichi Nagakute-sh, Aichi 92, 〒4801192, JP)
International Classes:
C22B21/06; C22B7/00; C22B9/02; C22B9/10
Foreign References:
JP2005501968A2005-01-20
JPH0873959A1996-03-19
JPH08199257A1996-08-06
JPH0770666A1995-03-14
JPH05295466A1993-11-09
JP2006511705A2006-04-06
Attorney, Agent or Firm:
MORIOKA Masayuki et al. (SANSUI PATENT FIRM, Meieki Forest Bldg. 6F 23-17, Meieki 5-chome, Nakamura-ku, Nagoya-sh, Aichi 02, 〒4500002, JP)
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