序言 世界铌的资源和生产主要集中在巴西和加拿大,而铌的消费国主要是美国、欧洲各国和日本。世界铌的生产能力约30000吨(以Nb_2O_5计,下同),1986年世界铌的产量为21000吨,消费量为20000吨。 1965年世界铌的消费量还不到5000吨,20年增长了3倍,年增长率为10％。铌主要作为钢和耐热合金的合金元素,它是工业化国家最需要的金属之一。进入八十年代后,由于石油价格下跌,石油钢管需求量减少及 Preface World niobium resources and production are mainly concentrated in Brazil and Canada, while the consumer of niobium is mainly the United States, European countries and Japan. The world niobium production capacity of about 30,000 tons (Nb_2O_5 dollars, the same below), in 1986 the world production of 21,000 tons of niobium, the consumption of 20,000 tons. World niobium consumption in 1965 was less than 5,000 tons, a threefold increase in 20 years, an annual increase of 10%. Niobium is mainly used as an alloying element for steel and heat-resistant alloys, and it is one of the metals most demanded in industrialized countries. After entering the 1980s, the demand for petroleum steel pipe decreased due to the drop of oil price