Title:
LEAD CONTENT REDUCTION METHOD OF SLAG
Document Type and Number:
Japanese Patent JP2008068156
Kind Code:
A
Abstract:
To provide a method which treats slag obtained by a high-temperature treatment of waste as it is raw to allow a molten lead salt to elute from the slag, and enables a decrease in lead content of the slag in an ash melting furnace.
In an exit of a melting cinder notch, the slag containing the molten lead salt is washed with an aqueous acid (pH2-5) to allow the molten lead salt to elute from the slag. The washing by the aqueous acid is preferably carried out for 40-60 minutes by stirring or flowage. As an acid, a hydrochloric acid, a sulfuric acid, a nitric acid, an acetic acid, a carbonic acid, an oxalic acid, a phosphoric acid, a formic acid, or the like is suitable.
Inventors:
SEKIGUCHI YOSHITOSHI
HAMA TOSHIO
SUZUKI HIDEO
SHITAYA HIDEO
SATO HIDEO
SAKAKIBARA KOJI
NAKAMURA KAZUNORI
HAMA TOSHIO
SUZUKI HIDEO
SHITAYA HIDEO
SATO HIDEO
SAKAKIBARA KOJI
NAKAMURA KAZUNORI
Application Number:
JP2006246410A
Publication Date:
March 27, 2008
Filing Date:
September 12, 2006
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO
International Classes:
B09B3/00; C22B7/04; C22B13/00; F27D15/00
Attorney, Agent or Firm:
Norihiko Hibi
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko
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