Title:
SOIL CLEANING METHOD
Document Type and Number:
WIPO Patent Application WO/2012/008032
Kind Code:
A1
Abstract:
The disclosed method sorts contaminated soil into gravel, coarse soil and fine soil without using water, and separates contaminants from the coarse soil easily and inexpensively. The soil cleaning method is characterized in that after a pre-treatment process of mixing dehydrating agent with the soil to reduce the water content to 10 mass% or less, the soil with water content reduced to 10 mass% or less in said pre-treatment process is fed into a dry magnetic separator and a magnetic separation process of separating and removing contaminants in the coarse soil as magnetic material is performed. Sorting the soil in a dry state into magnetic material and nonmagnetic material and recovering the magnetic material that is highly contaminated facilitates separation of fine soil from the contaminated soil and enables easy reduction of the contaminant content in the coarse soil.
Inventors:
YOSHI, Shunsuke (4-14-1, Sotokanda, Chiyoda-k, Tokyo 21, 〒1010021, JP)
吉 俊輔 (〒21 東京都千代田区外神田四丁目１４番１号 ＤＯＷＡエコシステム株式会社内 Tokyo, 〒1010021, JP)
吉 俊輔 (〒21 東京都千代田区外神田四丁目１４番１号 ＤＯＷＡエコシステム株式会社内 Tokyo, 〒1010021, JP)
Application Number:
JP2010/061959
Publication Date:
January 19, 2012
Filing Date:
July 15, 2010
Export Citation:
Assignee:
DOWA ECO-SYSTEM CO., LTD. (4-14-1, Sotokanda Chiyoda-k, Tokyo 21, 〒1010021, JP)
ＤＯＷＡエコシステム株式会社 (〒21 東京都千代田区外神田四丁目１４番１号 Tokyo, 〒1010021, JP)
YOSHI, Shunsuke (4-14-1, Sotokanda, Chiyoda-k, Tokyo 21, 〒1010021, JP)
ＤＯＷＡエコシステム株式会社 (〒21 東京都千代田区外神田四丁目１４番１号 Tokyo, 〒1010021, JP)
YOSHI, Shunsuke (4-14-1, Sotokanda, Chiyoda-k, Tokyo 21, 〒1010021, JP)
International Classes:
B09C1/02; B03C1/00; B09C1/00; B09C1/08
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (Hazuki International, Kakubari Building 1-20, Sumiyoshi-cho, Shinjuku-k, Tokyo 65, 〒1620065, JP)
Claims: