Title:
METHOD OF PRETREATMENT OF FLY ASH
Document Type and Number:
WIPO Patent Application WO/2005/077557
Kind Code:
A1
Abstract:
A method of the pretreatment of a fly ash, characterized in that prior to the wet treatment of a fly ash, the fly ash is pulverized in advance. It is desirable that the particle size of the pulverized fly ash is such that it has a specific surface area of 10 m2/g or more, or that it has a frequency on the volume basis of 1 micron diameter of 0.01 % or more as measured by a laser type particle size measuring device, or that it has a frequency on the volume basis of 10 micron diameter or less of 90 % or more as measured by a laser type particle size measuring device. The above method comprising pulverizing a fly ash in advance allows the inhibition of the elution of a heavy metal or the like into a liquid in the subsequent wet treatment of a fly ash.
Inventors:
AICHI TARO (JP)
YATSUZUKA HIDEKI (JP)
DOHI TETSUO (JP)
YATSUZUKA HIDEKI (JP)
DOHI TETSUO (JP)
Application Number:
PCT/JP2004/011081
Publication Date:
August 25, 2005
Filing Date:
August 03, 2004
Export Citation:
Assignee:
DOWA MINING CO (JP)
AICHI TARO (JP)
YATSUZUKA HIDEKI (JP)
DOHI TETSUO (JP)
AICHI TARO (JP)
YATSUZUKA HIDEKI (JP)
DOHI TETSUO (JP)
International Classes:
B09B3/00; B02C17/00; B02C17/20; B03B9/04; (IPC1-7): B09B3/00; B02C17/00; B02C17/20
Foreign References:
| JP2003190909A | 2003-07-08 | |||
| JP2002011366A | 2002-01-15 | |||
| JP2003144949A | 2003-05-20 | |||
| JP2002336813A | 2002-11-26 | |||
| JPH10202220A | 1998-08-04 | |||
| JPH09241017A | 1997-09-16 |
Attorney, Agent or Firm:
Hagiwara, Yasushi (Kameya Hagiwara and Inoue, Shinjuku
Akebonobashi Building, 1-12, Sumiyoshi-ch, Shinjuku-ku Tokyo 65, JP)
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