ON THE PRODUCTION PROCESS OF CRUDE NIOBIUM BY ARC REDUCTION

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Nippon Kinzoku Gakkaishi (Japan)

OSTI ID:4718848

Kimura, H; Sasaki, Y

Crude niobium metal containing about 99% Nb was obtained from a mixture of niobium pentoxide and niobium carbide by arc reduction by the following reaction: Nb/sub 2/O/sub 5/ + 5 NbC and up to st r 7 Nb + 5 CO. Mixtures of niobium pentoxide powder and niobium carbide powder were pressed into briquettes. To proceed with the above reaction at high temperature, they were arc-melted by using a laboratory argon-arc furnace with tungsten electrodes and a waterlting time, argon pressure, and number of times of remelting on the reaction were investigated. The purity, of reductants as crude niobium metal, the composition of furnace gas, and the weight losses during arc melting were examined. It was observed that a large amount of CO gas was generated from the molten specimen during arc-melting. Increase of niobium content in reductants was remarkable on account of both the reaction and the vaporization of niobium monoxide especially in low pressure melting. (auth)

• Research Organization: National Research Inst. for Metlas, Tokyo
• NSA Number: NSA-17-021601
• OSTI ID: 4718848
• Journal Information: Nippon Kinzoku Gakkaishi (Japan), Journal Name: Nippon Kinzoku Gakkaishi (Japan) Vol. Vol: 26; ISSN NIKGA
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

ARGON
CARBON MONOXIDE
CHEMISTRY
COMPACTING
COOLING
COPPER
CRUCIBLES
ELECTRIC ARCS
ELECTRODES
EVAPORATION
FURNACES
IMPURITIES
LOSSES
MELTING
MIXING
NIOBIUM
NIOBIUM CARBIDES
NIOBIUM OXIDES
POWDERS
PRESSURE
PRODUCTION
REDUCTION
TEMPERATURE
TUNGSTEN
WATER
WEIGHT