REMOVAL OF LEAD FROM LEAD GLASS CUT REFUSE

PURPOSE:To remove lead from the cut refuse of lead glass by melting and separating the cut refuse of lead glass so as not to elute a lead component in order to prevent environmental pollution. CONSTITUTION:An Na2O component is added to the cut refuse of lead glass to adjust the SiO2/Na2O wt. ratio i...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAYAMA MICHIO, IKEDA SHINGO, NODA HIDETOSHI, KATO YOSHINORI, YOSHIKOSHI HIDEYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY DISPOSAL OF SOLID WASTE FERROUS OR NON-FERROUS ALLOYS METALLURGY PERFORMING OPERATIONS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE:To remove lead from the cut refuse of lead glass by melting and separating the cut refuse of lead glass so as not to elute a lead component in order to prevent environmental pollution. CONSTITUTION:An Na2O component is added to the cut refuse of lead glass to adjust the SiO2/Na2O wt. ratio in lead glass to 1.2-3.0 and, further, a carbon source such as coke or charcoal is mixed with the cut refuse as a reducing agent and the resulting mixture is heated and melted at 800 deg.C or higher in a two-phase or three-phase Heroult electric furnace to separate lead in the cut refuse of lead glass. This method is accepted by both of Japanese and American standards of a Pb elution test and effective for avoiding environmental pollution accompanied by the elution of lead.