ニオブ・タンタルの製錬・用途およびその開発状況
1984 年 100 巻 1152 号 p. 142-152
詳細
1984 年 100 巻 1152 号 p. 142-152
Until the discoveries of huge pyrochlore deposits in Brazil and Canada in 1950's, both Nb and Ta had been extracted from Tantalite or Columbite using by solvent (MIBK) extraction technique.
Using by the above pyrochlore resources, more than 95% of niobium products, such as Fe-Nb, various grade of oxides (technical, optical etc.) and Nb-metal are produced at present.
The application of niobium to steels, optical glass, electronic component, superalloys, refractory metals, superconducting materials and catalysts are discussed in this paper. On the other hand, tantalum has no bright future even though Ta-condencer, cemented carbide and super-anti corrosive materials are stable and reliable markets, so that the total comsumption of Ta in the world to be remaining about 1, 600t in Ta205 during a few years. The consumption of niobium will increase in the field of electronics, superalloys, catalyst, however in true we cannot expect it too much in steel industry.
