Title:
飛灰の処理方法
Document Type and Number:
Japanese Patent JP4524493
Kind Code:
B2
Abstract:
To provide a treatment method for flying ash capable of being easily utilized at low cost in industry and realizing volume-reduction in the safe and stable state and recycling of molten flying ash.
Water containing a mineral acid such as sulfuric acid is added to a water-washed residue obtained by solid/liquid separation after the flying ash containing the heavy metal is washed with water to adjust pH to 3-4, it is reacted at a reaction temperature of 60°C or higher, preferably 80°C or higher for 2 hours or longer, preferably 3 hours or longer to perform leaching and an alkali agent such as lime is added to the obtained leaching liquid to neutralize it to pH 7 or more.
COPYRIGHT: (C)2006,JPO&NCIPI
Inventors:
Aichi Taro
Hiroshi Asada
Funaki Isao
Yatsuka Hideki
Hiroshi Asada
Funaki Isao
Yatsuka Hideki
Application Number:
JP2005072210A
Publication Date:
August 18, 2010
Filing Date:
March 15, 2005
Export Citation:
Assignee:
DOWA Metals & Mind Co., Ltd.
International Classes:
B09B3/00; B01D11/02; C22B7/00; C22B19/30; C22B19/34
Domestic Patent References:
JP61174112A | ||||
JP2002018395A | ||||
JP11106843A | ||||
JP2001179215A | ||||
JP2002018396A | ||||
JP2004033893A | ||||
JP2003334509A | ||||
JP50044917A | ||||
JP10109077A | ||||
JP2001113242A |
Attorney, Agent or Firm:
Koichi Okawa