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1973年,美国拿出储备的大量铌铁出售,以供应各国的需要,世界铌精矿的产量,比1972年降低20%。1970年铌精矿的产量最高,为40,000,000磅,1973年铌精矿的产量仅为26,500,000磅。1973年,美国的烧绿石进口量降低了11%,但铌铁的进口量却很多。在资本主义国家,铌大量用于钢中,1973年美国铌的消耗量估计增加了8.9%,超过4,000,000磅铌。与1973年年初相比,年底标准铌铁的价格增加了14%到20%,铌铁矿的价格
In 1973, a large amount of ferroniobium released by the United States was sold to meet the needs of various countries. The world’s production of niobium concentrate was reduced by 20% over 1972. The highest niobium concentrates were produced in 1970 at 40,000,000 pounds and the production of niobium concentrates in 1973 was only 26,500,000 pounds. In 1973, the import of pyrochlore in the United States was reduced by 11%, but ferroniobium was imported in large quantities. In capitalist countries, niobium is heavily used in steel. In 1973, the consumption of niobium in the United States was estimated to have increased by 8.9% to over 4,000,000 pounds of niobium. Compared with the beginning of 1973, the price of standard ferroniobium increased by 14% to 20% by the end of the year. The price of niobite