Title:
A disposal method of Cr2O3 content slag
Document Type and Number:
Japanese Patent JP6037943
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a CrO-containing slag treatment method enabling the CrO-containing slag to be treated so as to satisfy soil environmental standard by preventing elution of hexavalent chromium.SOLUTION: The CrO-containing slag treatment method comprises: a Cr content determination step of determining a percentage of the Cr amount contained in MgO CrOto the total Cr amount contained in the CrO-containing slag; a first cooling step of, in a process of cooling molten slag in which slag is in a molten state, keeping the molten slag in a non-oxidation atmosphere until the molten slag is cooled to 800°C or less when the percentage of the Cr amount determined in the Cr amount determination step is less than 50 mass%; and a second cooling step of keeping the molten slag in non-oxidation atmosphere until the molten slag is cooled to 600°C or less in the process of cooling the molten slag when the percentage of the Cr amount determined in the Cr amount determination step is 50 mass% or more and less than 80 mass%.
Inventors:
Nobuhiro Kobayashi
Motohiro Nagao
Taiichi Ueyama
Katsushige Nishiguchi
Tomioka Atsushi
Takashi Abiko
Koichi Sakamoto
Shunsuke Hori
Motohiro Nagao
Taiichi Ueyama
Katsushige Nishiguchi
Tomioka Atsushi
Takashi Abiko
Koichi Sakamoto
Shunsuke Hori
Application Number:
JP2013119792A
Publication Date:
December 07, 2016
Filing Date:
June 06, 2013
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C04B5/00; C21C5/54; C21C7/00; F27D15/00; F27D15/02
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Attorney, Agent or Firm:
Toshio Yasuda
Mikio Yasuda
Mikio Yasuda