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(一)钽资源概况稀有金属钽在地壳中的地质化学丰度为2.5ppm,钽在地壳中主要与性质相似的铌伴生,它是一种熔点高(2996℃),耐蚀性强,导热性能良好,并且具有独特的电气性能和优良的可塑性的金属。主要有用矿物是钽铁矿和铌铁矿。钽矿主要是从无规律的、含量特别低(0.1%Ta_2O_5)的伟晶
(I) Overview of Tantalum Resources The geochemical abundance of rare metal tantalum in the crust is 2.5ppm. Tantalum is mainly associated with niobium of similar nature in the crust. It is a high melting point (2996 ℃) with high corrosion resistance and thermal conductivity Good performance, and has a unique electrical properties and excellent plasticity of the metal. The main useful minerals are tantalite and niobite. Tantalum ore is mainly from non-regular, very low content (0.1% Ta_2O_5) Pei Jing