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Founder of Niobium-Tantalum Granite Deposit--Li RenkeShen Youguang摘 要:<正> Li Renke, Vice director of Nonferrous Metals Geological Research Institute of Guangxi, Senior Engineer, discovered a new type of niobium-tantalum granite deposit as his major contribution and made significant progress in ore exploration of this type of ore deposit.关键词:......
of tantalum increased and the dissolution rate of niobium decreased as an interaction existed between niobium and tantalum. And increasing the mole ratio of Nb2O5 to Ta2O5 in the mixture was beneficial to the dissolution of both Ta2O5 and Nb2O5. In addition, the mechanism of the interaction between niobium and tantalum was also investigated through phase and chemical analysis. Key words: Ta2O5; Nb2O5......
) was leached with the mixture of HF and H2SO4, HF and HNO3 acids, respectively. Optimal conditions ensuring high recovery of tantalum and niobium (up to 99%) into solution, and radionuclides into insoluble residue were determined. Fluoride-sulfuric acid and fluoride-nitric acid schemes were proposed for PMC leaching by an extractive separation of tantalum form niobium, lead and impurities, and production......
, 18: 527?535. [13] ZHOU Hong-ming, ZHENG Shi-li, ZHANG Yi. Kinetics investigations on the leaching of niobium from a low-grade niobium-tantalum ore by concentrated KOH solution[J]. Chinese Journal......
; 1 Introduction In nature, niobium almost invariably occurs as complex oxide minerals in association with tantalum. The most common geological occurrence of both suits... and the prepared samples. Special thanks are due to Mrs. Sahar Issa, Ms. Hayat Hussein and Mr. Saleh El Mahdi (NMA, Egypt) for their help in this work. References [1] Tantalum–Niobium International......
] CRUNDWELL F K. How do bacteria interact with minerals[J]. Hydrometallergy, 2003(71): 75-81. [3] ZHOU Hong-ming, ZHENG Shi-li, ZHANG Yi. Leaching of a low-grade niobium-tantalum ore by highly......
