アーク還元による粗金属ニオブの製造について

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書誌事項

タイトル別名
  • On the Production Process of Crude Niobium by Arc Reduction
  • アーク カンゲン ニ ヨル アラガネゾク ニオブ ノ セイゾウ ニ ツイテ

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抄録

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: Nb2O5+5NbC→7Nb+5CO. 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 water-cooled copper crucible. The effects of melting 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 vapourization of niobium monoxide especially in low pressure melting.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 26 (11), 699-703, 1962

    公益社団法人 日本金属学会

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