Title:
RECOVERY METHOD OF NOBLE METAL FROM INCINERATION ASH
Document Type and Number:
Japanese Patent JP2019019346
Kind Code:
A
Abstract:
To reduce a cost required for recovering a noble metal in incineration ash and enhance a recovery rate of noble metal as compared with a conventional one.SOLUTION: There is provided a recovery method of a noble metal which is a method for recovering a noble metal as a molten metal from incineration ash of waste and comprises: a magnetic separation step of subjecting the incineration ash to magnetic separation; a melting step of adding at least one kind of fuel selected from coal, coke and a substitute for coke to the incineration ash after the magnetic separation step, heating and melting; a cooling step of cooling a molten metal produced in the melting step to produce a solidified product composed of a slag phase and a metal phase; and a molten metal recovery step of recovering a noble metal from the metal phase.SELECTED DRAWING: Figure 1
Inventors:
MAEDA HIDETO
Application Number:
JP2017136113A
Publication Date:
February 07, 2019
Filing Date:
July 12, 2017
Export Citation:
Assignee:
DOWA ECO SYSTEM CO LTD
International Classes:
C22B7/00; A62D3/33; B01D53/50; B01D53/56; B01D53/62; B01D53/68; B01D53/81; B03C1/00; B03C1/02; B09B3/00; B09B5/00; C22B1/00; F27D17/00
Domestic Patent References:
| JP2001232341A | 2001-08-28 | |||
| JP2007314352A | 2007-12-06 | |||
| JPH1121155A | 1999-01-26 | |||
| JPS6456184A | 1989-03-03 | |||
| JP2005132878A | 2005-05-26 | |||
| JPS59158909A | 1984-09-08 | |||
| JP2004000882A | 2004-01-08 |
Other References:
上野 新: "2-5.焼却灰溶融・人工骨材製造システムの開発", 第8回日本エネルギー学会大会講演要旨集, JPN6021007170, 22 July 1999 (1999-07-22), JP, pages 123 - 126, ISSN: 0004456191
松岡庄五, 地球環境シリーズ 工業廃水・廃材からの資源回収技術, JPN6021007171, 12 August 2010 (2010-08-12), JP, pages 233 - 239, ISSN: 0004456192
松岡庄五, 地球環境シリーズ 工業廃水・廃材からの資源回収技術, JPN6021007171, 12 August 2010 (2010-08-12), JP, pages 233 - 239, ISSN: 0004456192
Attorney, Agent or Firm:
Koji Hagiwara
Tetsuo Kanamoto
Miaki Kametani
Takashi Saito
Tetsuo Kanamoto
Miaki Kametani
Takashi Saito