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    REDUCTION TREATMENT METHOD FOR CHROMIUM OXIDE-CONTAINING SUBSTANCE, AND PRODUCTION METHOD OF CIVIL ENGINEERING WORKS MATERIAL

    New search for: MATSUNAGA HISAHIRO

    To provide a reduction treatment method for a chromium oxide-containing substance capable of reducing the elution amount of Cr.SOLUTION: A reduction treatment method for a chromium oxide-containing substance includes: making the chromium oxide-containing substance absorb water of 50% or more to the water absorption coefficient of the chromium oxide-containing substance; and mixing the chromium oxide-containing substance having absorbed the water therein with a sulfur-containing substance having oxidation number of +5 or less so as to blow water vapor into a mixture obtained by the mixing; alternatively, mixing a chromium oxide-containing substance with a sulfur-containing substance having oxidation number of +5 or less; and making a mixture obtained by the mixing absorb water of 50% or more to the water absorption coefficient of the chromium oxide-containing substance, so as to blow water vapor into the mixture with the water absorbed therein.SELECTED DRAWING: None

    【課題】Ｃｒ６＋溶出量をより低減できるクロム酸化物含有物質の還元処理方法を提供する。【解決手段】クロム酸化物含有物質に、上記クロム酸化物含有物質の吸水率に対して５０％以上の水を含ませ、上記水を含ませた上記クロム酸化物含有物質と、酸化数が＋５価以下の硫黄を含有する物質とを混合し、上記混合により得られた混合物に水蒸気を吹き込む。また、クロム酸化物含有物質と、酸化数が＋５価以下の硫黄を含有する物質とを混合し、上記混合により得られた混合物に、上記クロム酸化物含有物質の吸水率に対して５０％以上の水を含ませ、上記水を含ませた上記混合物に水蒸気を吹き込む。【選択図】なし

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    REDUCTION TREATMENT METHOD FOR CHROMIUM OXIDE-CONTAINING SUBSTANCE, AND PRODUCTION METHOD OF CIVIL ENGINEERING WORKS MATERIAL

    New search for: MATSUNAGA HISAHIRO

    To provide a reduction treatment method for a chromium oxide-containing substance capable of reducing the elution amount of Cr.SOLUTION: A reduction treatment method for a chromium oxide-containing substance includes: making the chromium oxide-containing substance absorb water of 50% or more to the water absorption coefficient of the chromium oxide-containing substance; and mixing the chromium oxide-containing substance having absorbed the water therein with a sulfur-containing substance having oxidation number of +5 or less so as to blow water vapor into a mixture obtained by the mixing; alternatively, mixing a chromium oxide-containing substance with a sulfur-containing substance having oxidation number of +5 or less; and making a mixture obtained by the mixing absorb water of 50% or more to the water absorption coefficient of the chromium oxide-containing substance, so as to blow water vapor into the mixture with the water absorbed therein.SELECTED DRAWING: None

    【課題】Ｃｒ６＋溶出量をより低減できるクロム酸化物含有物質の還元処理方法を提供する。【解決手段】クロム酸化物含有物質に、上記クロム酸化物含有物質の吸水率に対して５０％以上の水を含ませ、上記水を含ませた上記クロム酸化物含有物質と、酸化数が＋５価以下の硫黄を含有する物質とを混合し、上記混合により得られた混合物に水蒸気を吹き込む。また、クロム酸化物含有物質と、酸化数が＋５価以下の硫黄を含有する物質とを混合し、上記混合により得られた混合物に、上記クロム酸化物含有物質の吸水率に対して５０％以上の水を含ませ、上記水を含ませた上記混合物に水蒸気を吹き込む。【選択図】なし

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    REDUCTION TREATMENT METHOD FOR CHROMIUM OXIDE-CONTAINING SUBSTANCE, AND PRODUCTION METHOD OF CIVIL ENGINEERING WORKS MATERIAL

    New search for: MATSUNAGA HISAHIRO

    To provide a reduction treatment method for a chromium oxide-containing substance capable of reducing the elution amount of Cr.SOLUTION: A reduction treatment method for a chromium oxide-containing substance includes: making the chromium oxide-containing substance absorb water of 50% or more to the water absorption coefficient of the chromium oxide-containing substance; and mixing the chromium oxide-containing substance having absorbed the water therein with a sulfur-containing substance having oxidation number of +5 or less so as to blow water vapor into a mixture obtained by the mixing; alternatively, mixing a chromium oxide-containing substance with a sulfur-containing substance having oxidation number of +5 or less; and making a mixture obtained by the mixing absorb water of 50% or more to the water absorption coefficient of the chromium oxide-containing substance, so as to blow water vapor into the mixture with the water absorbed therein.SELECTED DRAWING: None

    【課題】Ｃｒ６＋溶出量をより低減できるクロム酸化物含有物質の還元処理方法を提供する。【解決手段】クロム酸化物含有物質に、上記クロム酸化物含有物質の吸水率に対して５０％以上の水を含ませ、上記水を含ませた上記クロム酸化物含有物質と、酸化数が＋５価以下の硫黄を含有する物質とを混合し、上記混合により得られた混合物に水蒸気を吹き込む。また、クロム酸化物含有物質と、酸化数が＋５価以下の硫黄を含有する物質とを混合し、上記混合により得られた混合物に、上記クロム酸化物含有物質の吸水率に対して５０％以上の水を含ませ、上記水を含ませた上記混合物に水蒸気を吹き込む。【選択図】なし

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    Title:

    REDUCTION TREATMENT METHOD FOR CHROMIUM OXIDE-CONTAINING SUBSTANCE, AND PRODUCTION METHOD OF CIVIL ENGINEERING WORKS MATERIAL

    Additional title:

    クロム酸化物含有物質の還元処理方法および土木工事用材料の製造方法

    Contributors:

    MATSUNAGA HISAHIRO (author)

    Publication date:

    2018-12-27

    Type of media:

    Patent

    Type of material:

    Electronic Resource

    Language:

    Japanese

    Classification:

    IPC:  B09B DISPOSAL OF SOLID WASTE , Beseitigung von festem Abfall / C04B Kalk , LIME

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