METHOD AND DEVICE FOR SOLIDIFYING/STABILIZING COMBUSTION ASH, OR THE LIKE

PROBLEM TO BE SOLVED: To obtain a safety-secured high-strength solidified body by decomposing dioxins contained in combustion ash, or the like, stabilizing toxic heavy metals and promoting the solidifying at the same time. SOLUTION: A CaO material and/or a silica material are added to the combustion...

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Bibliographic Details
Main Authors TANIYAMA TAKAYUKI, MATSUMOTO FUMIAKI, KONDO ATSUSHI, SHIBATA TAISUKE, TASHIRO SHUICHI
Format Patent
LanguageEnglish
Published 12.02.2002
Edition7
Subjects
ADHESIVES
CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS
CHEMISTRY
DISPOSAL OF SOLID WASTE
DYES
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PERFORMING OPERATIONS
POLISHES
RECLAMATION OF CONTAMINED SOIL SOIL
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To obtain a safety-secured high-strength solidified body by decomposing dioxins contained in combustion ash, or the like, stabilizing toxic heavy metals and promoting the solidifying at the same time. SOLUTION: A CaO material and/or a silica material are added to the combustion ash, or the like, to adjust the alkalinity of the combustion ash, or the like, to 0.75-2.2 and a nitrate and/or a metallic powder are further added to the combustion ash, or the like, for decomposing dioxins, which is then heat- treated at 200-450 deg.C while agitating. The heat-treated material is kneaded with water, which is then aged in steam of 10-95 deg.C.
Bibliography:Application Number: JP20000230122