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公开(公告)号：US20220062962A1
公开(公告)日：2022-03-03
申请号：US17422765
申请日：2020-02-21
Applicant: MITSUBISHI MATERIALS CORPORATION
Inventor： Shu Muraoka , Hiroshi Hayashi , Shota Nakayama , Yusuke Kimura
Abstract: A method for treating waste printed circuit board includes carbonizing waste printed circuit board together with a calcium compound at 400° C. to 600° C. in a non-oxidizing atmosphere to fix a halogen contained in the board as calcium halide and to melt a solder of the board to allow mounted parts to be easily separated from the board, performing crushing after the carbonizing, and sieving crushed materials into fine particles of less than 0.5 mm containing the calcium compounds, medium particles containing the mounted parts, and coarse particles containing board pieces such that the crushed materials are sorted into the calcium compounds, the mounted parts, and the board pieces.
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公开(公告)号：US20240076759A1
公开(公告)日：2024-03-07
申请号：US18268451
申请日：2021-04-09
Applicant: MITSUBISHI MATERIALS CORPORATION
Inventor： Shu Muraoka , Fumito Tanaka , Tomoya Morimoto
CPC classification number: C22B13/045 , C22B7/008 , C22B7/02
Abstract: There is provided a method for recovering lead from copper smelting dust according to the present invention includes an alkali leaching step of leaching lead contained in copper smelting dust with an alkali solution, a step of performing a solid liquid separation on a post-leaching solution and a leaching residue after the alkali leaching step, a neutralization step of adding an acid to the separated post-leaching solution to precipitate a lead, and a step of recovering a precipitate containing the lead by performing a solid liquid separation.
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Patent Agency Ranking
公开(公告)号：US20210343453A1
公开(公告)日：2021-11-04
申请号：US17281052
申请日：2019-10-18
Applicant: MITSUBISHI MATERIALS CORPORATION
Inventor： Kenshi Takahashi , Shu Muraoka , Hiroshi Hayashi
Abstract: In this treatment method of a coated wire, a coated wire, which is a metal wire coated with a resin, is subjected to low-temperature heating in a non-combustion atmosphere in coexistence with an alkali to embrittle the coating resin, the embrittled coating resin is crushed, and the coating resin and the metal wire are separated.
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公开(公告)号：US12183478B2
公开(公告)日：2024-12-31
申请号：US17281052
申请日：2019-10-18
Applicant: MITSUBISHI MATERIALS CORPORATION
Inventor： Kenshi Takahashi , Shu Muraoka , Hiroshi Hayashi
Abstract: In this treatment method of a coated wire, a coated wire, which is a metal wire coated with a resin, is subjected to low-temperature heating in a non-combustion atmosphere in coexistence with an alkali to embrittle the coating resin, the embrittled coating resin is crushed, and the coating resin and the metal wire are separated.
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公开(公告)号：US12186786B2
公开(公告)日：2025-01-07
申请号：US17422765
申请日：2020-02-21
Applicant: MITSUBISHI MATERIALS CORPORATION
Inventor： Shu Muraoka , Hiroshi Hayashi , Shota Nakayama , Yusuke Kimura
IPC: B09B3/25 , B02C18/00 , B02C23/08 , B07C5/06 , B07C5/342 , B07C5/344 , B09B3/40 , B09B101/17 , H05K3/22
Abstract: A method for treating waste printed circuit board includes carbonizing waste printed circuit board together with a calcium compound at 400° C. to 600° C. in a non-oxidizing atmosphere to fix a halogen contained in the board as calcium halide and to melt a solder of the board to allow mounted parts to be easily separated from the board, performing crushing after the carbonizing, and sieving crushed materials into fine particles of less than 0.5 mm containing the calcium compounds, medium particles containing the mounted parts, and coarse particles containing board pieces such that the crushed materials are sorted into the calcium compounds, the mounted parts, and the board pieces.
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公开(公告)号：US11088406B2
公开(公告)日：2021-08-10
申请号：US16479324
申请日：2018-01-23
Applicant: MITSUBISHI MATERIALS CORPORATION
Inventor： Shu Muraoka , Hiroshi Hayashi , Hiromichi Koizumi , Ryutaro Fujisawa
Abstract: A valuable material recovery method includes a discharge step of discharging a lithium-ion battery; a thermal decomposition step of reducing a lithium compound, which is a cathode active material, into a magnetic oxide by thermally treating the lithium-ion battery after being discharged; a crushing step of crushing the lithium-ion battery, after being thermally decomposed, into fragments of a size suitable for wind sorting, allowing part of the magnetic oxide to remain in the aluminum foil; a sieving step of sieving a crushed material to separate the crushed material into an oversized product and an undersized product; a wind sorting step of separating the oversized product into a heavy product and a light product; and a magnetic sorting step of sorting and recovering the aluminum foil with a residue of the magnetic oxide, as a magnetized material, and recovering the copper foil as a non-magnetized material from the light product.
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公开(公告)号：US20190386354A1
公开(公告)日：2019-12-19
申请号：US16479324
申请日：2018-01-23
Applicant: MITSUBISHI MATERIALS CORPORATION
Inventor： Shu Muraoka , Hiroshi Hayashi , Hiromichi Koizumi , Ryutaro Fujisawa
Abstract: A valuable material recovery method includes a discharge step of discharging a lithium-ion battery; a thermal decomposition step of reducing a lithium compound, which is a cathode active material, into a magnetic oxide by thermally treating the lithium-ion battery after being discharged; a crushing step of crushing the lithium-ion battery, after being thermally decomposed, into fragments of a size suitable for wind sorting, allowing part of the magnetic oxide to remain in the aluminum foil; a sieving step of sieving a crushed material to separate the crushed material into an oversized product and an undersized product; a wind sorting step of separating the oversized product into a heavy product and a light product; and a magnetic sorting step of sorting and recovering the aluminum foil with a residue of the magnetic oxide, as a magnetized material, and recovering the copper foil as a non-magnetized material from the light product.
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