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A platform for research: civil engineering, architecture and urbanism
METHOD FOR REMOVING RADIOACTIVE CESIUM AND METHOD FOR MANUFACTURING CALCINED PRODUCT
PROBLEM TO BE SOLVED: To provide a method for easily and efficiently removing radioactive cesium from waste contaminated with the radioactive cesium.SOLUTION: The method for removing radioactive cesium comprises the heating step of heating waste contaminated with radioactive cesium, a CaO source and/or a MgO source at a temperature of 1200-1350°C to volatilize the radioactive cesium in the waste. In the heating step, each mass of CaO, MgO and SiOhas 1.0-2.5 of a numerical value derived by (CaO+1.39×MgO)/SiO)(where, CaO, MgO and SiOrepresent a mass in terms of calcium oxide, a mass in terms of magnesium oxide and a mass in terms of silicon oxide, respectively). Each kind of the waste, the CaO source and the MgO source and a mixing ratio thereof are determined so that a molar ratio (Cl/(Cs+K)) of chlorine to cesium and potassium is 1.00 or less.SELECTED DRAWING: None
【課題】放射性セシウムで汚染された廃棄物から放射性セシウムを、容易にかつ効率的に除去する方法を提供する。【解決手段】放射性セシウムで汚染された廃棄物、及び、ＣａＯ源及び／又はＭｇＯ源を１２００〜１３５０℃で加熱して、上記廃棄物中の放射性セシウムを揮発させる加熱工程を含む放射性セシウムの除去方法であって、加熱工程において、ＣａＯ、ＭｇＯ、及びＳｉＯ２の各々の質量が、（（ＣａＯ＋１．３９×ＭｇＯ）／ＳｉＯ２）（式中、ＣａＯ、ＭｇＯ、ＳｉＯ２は、各々、カルシウムの酸化物換算の質量、マグネシウムの酸化物換算の質量、珪素の酸化物換算の質量を表す。）から導き出される数値が１．０〜２．５となり、かつ、塩素と、セシウム及びカリウムとのモル比（Ｃｌ／（Ｃｓ＋Ｋ））が１．００以下となるように、上記廃棄物、ＣａＯ源及びＭｇＯ源の各々の種類及び配合割合を定める放射性セシウムの除去方法。【選択図】なし
METHOD FOR REMOVING RADIOACTIVE CESIUM AND METHOD FOR MANUFACTURING CALCINED PRODUCT
PROBLEM TO BE SOLVED: To provide a method for easily and efficiently removing radioactive cesium from waste contaminated with the radioactive cesium.SOLUTION: The method for removing radioactive cesium comprises the heating step of heating waste contaminated with radioactive cesium, a CaO source and/or a MgO source at a temperature of 1200-1350°C to volatilize the radioactive cesium in the waste. In the heating step, each mass of CaO, MgO and SiOhas 1.0-2.5 of a numerical value derived by (CaO+1.39×MgO)/SiO)(where, CaO, MgO and SiOrepresent a mass in terms of calcium oxide, a mass in terms of magnesium oxide and a mass in terms of silicon oxide, respectively). Each kind of the waste, the CaO source and the MgO source and a mixing ratio thereof are determined so that a molar ratio (Cl/(Cs+K)) of chlorine to cesium and potassium is 1.00 or less.SELECTED DRAWING: None
【課題】放射性セシウムで汚染された廃棄物から放射性セシウムを、容易にかつ効率的に除去する方法を提供する。【解決手段】放射性セシウムで汚染された廃棄物、及び、ＣａＯ源及び／又はＭｇＯ源を１２００〜１３５０℃で加熱して、上記廃棄物中の放射性セシウムを揮発させる加熱工程を含む放射性セシウムの除去方法であって、加熱工程において、ＣａＯ、ＭｇＯ、及びＳｉＯ２の各々の質量が、（（ＣａＯ＋１．３９×ＭｇＯ）／ＳｉＯ２）（式中、ＣａＯ、ＭｇＯ、ＳｉＯ２は、各々、カルシウムの酸化物換算の質量、マグネシウムの酸化物換算の質量、珪素の酸化物換算の質量を表す。）から導き出される数値が１．０〜２．５となり、かつ、塩素と、セシウム及びカリウムとのモル比（Ｃｌ／（Ｃｓ＋Ｋ））が１．００以下となるように、上記廃棄物、ＣａＯ源及びＭｇＯ源の各々の種類及び配合割合を定める放射性セシウムの除去方法。【選択図】なし
METHOD FOR REMOVING RADIOACTIVE CESIUM AND METHOD FOR MANUFACTURING CALCINED PRODUCT
放射性セシウムの除去方法、及び、焼成物の製造方法
HONMA KENICHI (author) / OKAMURA SOICHIRO (author) / OGIRI TETSUO (author) / SAKAMOTO YOSHIAKI (author)
2016-12-28
Patent
Electronic Resource
Japanese
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