METHOD OF IODIDE REFINING OF HAFNIUM

FIELD: iodide refining of hafnium. ^ SUBSTANCE: interaction of iodine with black metal is carried out at temperature of 250-350°C. Sedimentation of refined hafnium is carried out at temperature of 1200-1600°C on heater (filament) made from molybdenum or zirconium wire in form of one or several loops...

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Hauptverfasser:	SINEGRIBOV VIKTOR ANDREEVICH, MORENKO OL'GA GRIGOR'EVNA, SHTUTSA MIKHAIL GEORGIEVICH, POGADAEV VLADIMIR ARKAD'EVICH, JUDINA TAT'JANA BORISOVNA, INDYK SERGEJ IVANOVICH, SOTSKOV KONSTANTIN VJACHESLAVOVICH, PIMENOV JURIJ VLADIMIROVICH, KOTSAR' MIKHAIL LEONIDOVICH, CHEREMNYKH GENNADIJ SERGEEVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: iodide refining of hafnium. ^ SUBSTANCE: interaction of iodine with black metal is carried out at temperature of 250-350°C. Sedimentation of refined hafnium is carried out at temperature of 1200-1600°C on heater (filament) made from molybdenum or zirconium wire in form of one or several loops connected to electrode end-pieces. Heater is formed in iodide refining apparatus in such way that lower part of each wire loop is suspended above insulator surface at clearance equal to 1/3-1/2 of final thickness of bar. Proposed method may be used for production of iodide hafnium bars more than 17 mm in diameter at height of heater loop more than 0.8 m. ^ EFFECT: enhanced purity by admixtures. ^ 4 cl, 1 tbl, 3 ex