Title:
Harmful element reducing method
Document Type and Number:
Japanese Patent JP6031270
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To simply, quickly and inexpensively remove arsenic from an object to be treated.SOLUTION: The method for reducing harmful elements includes a treatment process of reducing the arsenic content in the object to be treated by contacting the object with the harmful element-reducing agent containing a steelmaking slag of ≥85 mass%. Prior to carrying-out of the process, it is desirable to oxidize the trivalent arsenic included in the object to a pentavalent one, and the steelmaking slag preferably contains, by mass, ≥20% iron, ≥20% calcium and ≤10% silicon. Thereby, arsenic can be simply, quickly and inexpensively removed from the object. Further, hexavalent chrome, beryllium, nickel, copper, zinc, cadmium, mercury and lead as well as arsenic can be simply, quickly and inexpensively removed by exactly the same treatment as above.
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Inventors:
Kyoko Fujimoto
Tetsushi Jodai
Kazutoshi Hanada
Keiji Watanabe
Hiroyuki Tobo
Nobuo Uehara
Tetsushi Jodai
Kazutoshi Hanada
Keiji Watanabe
Hiroyuki Tobo
Nobuo Uehara
Application Number:
JP2012141055A
Publication Date:
November 24, 2016
Filing Date:
June 22, 2012
Export Citation:
Assignee:
jfe Steel Corporation
Utsunomiya University
Utsunomiya University
International Classes:
B01J20/06; A62D3/33; B01J39/02; B01J41/02; B09C1/02; B09C1/08; C02F1/28; C02F1/72
Domestic Patent References:
| JP2005074280A | ||||
| JP2005036159A | ||||
| JP53052283A | ||||
| JP56051240A | ||||
| JP2011093946A | ||||
| JP62045394A | ||||
| JP55132633A | ||||
| JP11057694A |
Foreign References:
| KR1020070066725A |
Attorney, Agent or Firm:
Hiroaki Sakai