Technology survey and development tendency investigation on tantalum-niobium hydrometallurgical extraction;

The paper suggests that it is of great importance and necessity for the development and operation of tantalum-niobium resources enterprises to develop non-metal mineral product market,according to the particularity of tantalum-niobium resources and their fluctuating market.

Current situation including advantages and disadvantages of tantalum-niobium industry in china,and the influence of china's entry in to WTO on domestic tantalum-nibium industry are analyzed.

The enrichment and recovery of tantalum and niobium through acid leaching and sodium alkali fusing from tungsten residue is studied.

The niobium-tantalum and rare-earths ore deposits in China and their occurred minerals are described.

The geochemistry of Niobium-Tantalum and Rare-Earths elements and crystal chemistry of their minerals are briefly described.

In the paper the long-range prediction of the pegmatite-type columbotantalite in FuTou-Xialiuyuan area of Northern Fujian is under discussion according to the characteristic analysis,model analysis,variant selection and the classification of association degree.

In the article the characteristics,demand-supply condition and tendency of tantalum-niobium resource in China was analyzed,and the benefits,main developing methods,risks at different developing times during enterprises’participating and developing the tantalum-niobium resource abroad were discussed.