METHOD OF PROCESSING SOLID WASTE AND REFUSE FORMED IN ZINC OXIDE-BASED VARISTOR CERAMICS PRODUCTION

FIELD: ceramics. SUBSTANCE: solid waste and refuse are dissolved in mineral acid, after which metal cation mixture is precipitated, washed, dried, and calcined to give oxide forms. In particular, dissolution is carried out in concentrated hydrochloric acid at 50-80 C at liquid phase-to-solid phase r...

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Bibliographische Detailangaben
Hauptverfasser:	ORDAN'JAN S.S, PIGUNOVA D.N, KOZHEVNIKOV O.A
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: ceramics. SUBSTANCE: solid waste and refuse are dissolved in mineral acid, after which metal cation mixture is precipitated, washed, dried, and calcined to give oxide forms. In particular, dissolution is carried out in concentrated hydrochloric acid at 50-80 C at liquid phase-to-solid phase ratio (2.9- 3.1):1 l/kg and metal cation mixture comprising Zn, Bi, Sb, Co, Mn, Cr, and Al is precipitated by sodium carbonate aqueous solution at 40-70 C. EFFECT: recovered varistor ceramics material and enabled reuse of recovered powder both in pure form and as additive to production blend prepared from pure oxides. 2 ex