METHOD FOR TREATING PAPER-MAKING SLUDGE, HUMIDITY CONDITIONING MATERIAL AND MANUFACTURING METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide a novel method for treating paper-making sludge and a method for effectively utilizing a by-product generated therefrom as a humidity conditioning material. SOLUTION: In the method for treating the paper-making sludge, the paper- making sludge containing silica is su...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAGI RYOJI, TERAYAMA TAKASHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY DISPOSAL OF SOLID WASTE IMPREGNATING OR COATING OF PAPER METALLURGY PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS RECLAMATION OF CONTAMINED SOIL SOIL SEPARATION TEXTILES THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a novel method for treating paper-making sludge and a method for effectively utilizing a by-product generated therefrom as a humidity conditioning material. SOLUTION: In the method for treating the paper-making sludge, the paper- making sludge containing silica is sufficiently blended with an alkaline metal hydroxide aqueous solution so that solid weight ratio of silica to alkaline metal hydroxide is 100:15 to 100:60, obtained mixture is dried by heating at 100 to 250°C and is calcined at 300 to 900°C, if necessary. In this case, ash obtained by calcining the paper-making sludge can be used instead of the paper-making sludge. An alkali silicate solid obtained by this treating method is useful as the humidity conditioning material. COPYRIGHT: (C)2004,JPO