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Conference Proceedings

Australia/Japan Extractive Metallurgy Symposium, Sydney

Conference Proceedings

Australia/Japan Extractive Metallurgy Symposium, Sydney

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Arc-Plasma Reduction of Tantalum Oxide with Carbon

The carbon reduction of tantalum pentoxide was investigated in a plasma-arc furnace. The sample was a mixture of tantalum pentoxide and graphite, vacuum pressed into a briquette and was reduced at about 3100C. Argon was used as the are gas. The optimum mixing ratio of carbon and tantalum pentoxide, C/Ta205 is 5.10--5.15. The sample, weighing 7 g is fused within 60^ 70 seconds by plasma-arc heating and the reduction of molten tantalum oxide with solid carbon pro- ceeds rapidly to approximately 99.5 % Ta during this period. The reduction that follows in the molten state is slow. Within about 10 minutes, the maximum tantalum content of the massive metal product reaches 99.9 % and the oxygen and carbon remaining in the product are 50 ppm and 400. 500 ppm respectively.
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  • Published: 1980
  • PDF Size: 0.643 Mb.
  • Unique ID: P198002003

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