The minerals of the silt of the end of Sanxia reservoir of Yangtze River were studied. Through the spectral analysis of the samples, the analysis of chemistry components and the content mensuration of main minerals, c...The minerals of the silt of the end of Sanxia reservoir of Yangtze River were studied. Through the spectral analysis of the samples, the analysis of chemistry components and the content mensuration of main minerals, chemistry components and composition of the main minerals were tested. The results show that: (1) The silt of Sanxia of the Yangtze in Chongqing is mainly composed of silicolites and quartz, containing Fe and Ti in small quantity and Yt, Yb and Sc in minim quantity. The content of Yt, Yb and Sc is 25.8, 2.06, and 6.60 g·t -1 respectively. (2) Thereinto, the content of Sc is 101 g·t -1 in ilmenite and 121 g·t -1 in titanium-picrite. On the basis of these results, Sc leaching conditions and Sc leaching media are investigated by leaching media of HCl, H_2SO_4 and HNO_3. The results show that HCl can be used as the leaching media and its best leaching conditions are as follows: The leaching concentration is 2280%; the leaching ration on liquid-solid is 2∶1; the leaching temperature is 90 ℃; the leaching time is 10 h and the leaching granularity of the test sample is -0.040 mm. The best condition of HCl adding assiting solvent is that assisting solvent is No.7 and its dosage is 40 g·t -1, which leaching ratio is 81.31%.展开更多
文摘The minerals of the silt of the end of Sanxia reservoir of Yangtze River were studied. Through the spectral analysis of the samples, the analysis of chemistry components and the content mensuration of main minerals, chemistry components and composition of the main minerals were tested. The results show that: (1) The silt of Sanxia of the Yangtze in Chongqing is mainly composed of silicolites and quartz, containing Fe and Ti in small quantity and Yt, Yb and Sc in minim quantity. The content of Yt, Yb and Sc is 25.8, 2.06, and 6.60 g·t -1 respectively. (2) Thereinto, the content of Sc is 101 g·t -1 in ilmenite and 121 g·t -1 in titanium-picrite. On the basis of these results, Sc leaching conditions and Sc leaching media are investigated by leaching media of HCl, H_2SO_4 and HNO_3. The results show that HCl can be used as the leaching media and its best leaching conditions are as follows: The leaching concentration is 2280%; the leaching ration on liquid-solid is 2∶1; the leaching temperature is 90 ℃; the leaching time is 10 h and the leaching granularity of the test sample is -0.040 mm. The best condition of HCl adding assiting solvent is that assisting solvent is No.7 and its dosage is 40 g·t -1, which leaching ratio is 81.31%.
