Title:
A removing method of radioactive cesium, and a manufacturing method of a calcination thing
Document Type and Number:
Japanese Patent JP6243484
Kind Code:
B2
Abstract:
Provided is a method of easily and efficiently removing radioactive cesium from a waste contaminated with radioactive cesium. The method of removing radioactive cesium includes a heating step of heating a waste contaminated with radioactive cesium and a CaO source and/or a MgO source at a temperature of from 1,200 to 1,350°C to volatilize the radioactive cesium in the waste. In the heating step, the kinds and the blending ratios of the waste, the CaO source, and the MgO source are set so that the masses of CaO, MgO, and SiO 2 satisfy the equation: (CaO+1.39×MgO)/SiO 2 )=1.0 to 2.5 (in the equation, CaO, MgO, and SiO 2 represent the mass of calcium in terms of an oxide, the mass of magnesium in terms of an oxide, and the mass of silicon in terms of an oxide, respectively).
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Inventors:
Kenichi Homma
Soichiro Okamura
Tetsuo Ogiri
Yoshiaki Sakamoto
Soichiro Okamura
Tetsuo Ogiri
Yoshiaki Sakamoto
Application Number:
JP2016136646A
Publication Date:
December 06, 2017
Filing Date:
July 11, 2016
Export Citation:
Assignee:
Taiheiyo Cement Co., Ltd.
International Classes:
G21F9/32; C04B18/10; G21F9/28
Domestic Patent References:
| JP2004292198A | ||||
| JP2009172495A | ||||
| JP2006234620A | ||||
| JP2006348176A | ||||
| JP2003315499A |
Foreign References:
| US4164425 |
Other References:
大迫政浩,災害・放射能汚染廃棄物の処理における現状と課題,日本,日本エネルギー学会リサイクル部会講習会,2012年 9月14日,p.28-35,URL,http://www.jie.or.jp/recycle/katudou/seminar%2012-9-14/kouen%209-14-3.pdf
Attorney, Agent or Firm:
Naoyuki Koda
Toshiya Murachi
Toshiya Murachi