Enhanced bioleaching of granite-type uranium ore pretreated by microwave: process optimisation and kinetics

2021 ◽  
Author(s):  
Chao Liu ◽  
Bingyou Liao ◽  
Shiyong Nie ◽  
Xuegang Wang ◽  
Zhanxue Sun ◽  
...  
Keyword(s):  
Process Optimisation ◽  
Uranium Ore ◽  
Granite Type ◽  
Microwave Process

Mineralogical Study of Huashan Granite-Type Uranium Ore Deposit in Northeast of Guangxi

2012 ◽  
Vol 621 ◽  
pp. 17-22 ◽  
Author(s):  
Zhi Qiang Kang ◽  
Zuo Hai Feng ◽  
Yong Gao Huang ◽  
Hong Yi Chen ◽  
Wei Fu ◽  
...  
Keyword(s):  
Uranium Mineral ◽  
Ore Deposit ◽  
Granite Pluton ◽  
Uranium Ore ◽  
Mineralogical Characteristics ◽  
Granite Type ◽  
Mineralogical Study ◽  
Mineral Compositions ◽  
The Difference ◽  
Main Component

Huashan granite-type uranium ore deposit is originated within the Huashan granite pluton in northeast of Guangxi, the mineral (mineralization) occurrences already found include Changchong, Baishijiao and Caomiping. Previous studies are relatively weak, especially in mineralogical characteristics, in this paper, a detailed study of minerals has been carried out through EPMA and EDS, the results show that the uranium mineral compositions of the three mineral (mineralization) occurrences are significantly different, but all of them are of secondary uranium minerals, among them, the main component of Changchong mineral (mineralization) occurrence is (meta-) autunite, of Baijiaoshi mineral (mineralization) occurrence is kasolite, and of Caomiping mineral (mineralization) occurrence is torbernite and zeunerite, which reflect the difference of their minerals sources.

scholarly journals Comparison of different approaches for bioleaching of a granite-type uranium ore

2019 ◽  
Vol 98 ◽  
pp. 04004 ◽  
Author(s):  
Gongxin Chen ◽  
Zhanxue Sun ◽  
Yajie Liu ◽  
Jinhui Liu ◽  
Baoqun Hu ◽  
...  
Keyword(s):  
Recovery Rate ◽  
Uranium Deposit ◽  
Southern China ◽  
Uranium Ore ◽  
Study Results ◽  
Significant Difference ◽  
Uranium Bioleaching ◽  
Granite Type ◽  
Pyrite Ores ◽  
Leaching Efficiency

Uranium bioleaching has been rapidly developed in China during recent years. However, some problems during bioleaching, such as low uranium leaching efficiency for rocks lacking pyrite, remain to be solved. A granite type uranium deposit from southern China was selected for the study of U bioleaching with addition of pyrite. Experiments using four approaches, including (i) pyrite ores mixing with culture, (ii) pyrite tiled on the surface of ores with culture, (iii) no pyrite ores with culture, and (iv) pyrite ores without culture were examined in this study. Results showed that bacteria can improve U leaching efficiency, particularly by adding pyrite into ore. Approach (i) pyrite ores mixing with culture had the highest U concentration and the highest recovery rate of the four approaches. No significant difference was observed between approaches (ii) pyrite tiled on the surface of ores with culture and (iii) no pyrite ores with culture.

scholarly journals Metallogenic characteristics and genesis of granite type uranium ore bodies in South China

2021 ◽  
Vol 261 ◽  
pp. 02068
Author(s):  
Zekun Liu
Keyword(s):  
South China ◽  
Uranium Deposits ◽  
Uranium Ore ◽  
Ore Bodies ◽  
Geological Conditions ◽  
Granite Type ◽  
Important Progress ◽  
Made In ◽  
Metallogenic Characteristics

South China is the key producing area of granite-type uranium deposits in China. After decades of exploration, many important progress has been made in the study of metallogenic regularity of granite type uranium deposits in this area. On the basis of previous studies, this paper attempts to sort out the geological conditions and characteristics of diagenesis and mineralization of granite type uranium deposits in South China, and discuss their metallogenic models, so as to better summarize the metallogenic regularity and serve the prospecting and prediction.

Natural radionuclides 238U, 226RA, AND 222RN in the surface water of the ELKONSKY uranium-ore district (South Yakutiya)

2019 ◽  
Vol 46 (6) ◽  
pp. 613-620
Author(s):  
A. P. Chevychelov ◽  
P. I. Sobakin ◽  
L. I. Kuznetsova
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
20Th Century ◽  
Radioactive Contamination ◽  
Raw Materials ◽  
Natural Radionuclides ◽  
Water Migration ◽  
Uranium Ore ◽  
Wide Scale ◽  
Ore District

Chemical composition of the surface water and the contents of the radionuclides 238U, 226Ra, and 222Rn in water was examined within the natural and man-made landscapes of South Yakutiya. It was demonstrated that intense water migration of these radionuclides from radioactive dump pits of the man-made landscapes of the Elkonsky uranium-ore district, which were created during the process of wide-scale exploration surveys for radioactive raw materials conducted during the last third of the 20th century, had occurred. Currently, the areas of water dissipation of 238U and 226Ra are detected at a distances of 2 km and greater from the source of the radioactive contamination along the outflow vector.

scholarly journals Burial and Exhumation History of the Lujing Uranium Ore Field, Zhuguangshan Complex, South China: Evidence from Low-Temperature Thermochronology

Minerals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 116
Author(s):  
Yue Sun ◽  
Barry P. Kohn ◽  
Samuel C. Boone ◽  
Dongsheng Wang ◽  
Kaixing Wang
Keyword(s):  
Early Cretaceous ◽  
Late Cretaceous ◽  
South China ◽  
Thermal History ◽  
Fission Track ◽  
Thermal Evolution ◽  
Negative Relationship ◽  
The Tibetan Plateau ◽  
Uranium Ore ◽  
Production Area

The Zhuguangshan complex hosts the main uranium production area in South China. We report (U-Th)/He and fission track thermochronological data from Triassic–Jurassic mineralized and non-mineralized granites and overlying Cambrian and Cretaceous sandstone units from the Lujing uranium ore field (LUOF) to constrain the upper crustal tectono-thermal evolution of the central Zhuguangshan complex. Two Cambrian sandstones yield reproducible zircon (U-Th)/He (ZHe) ages of 133–106 Ma and low effective uranium (eU) content (270–776 ppm). One Upper Cretaceous sandstone and seven Mesozoic granites are characterized by significant variability in ZHe ages (154–83 Ma and 167–36 Ma, respectively), which show a negative relationship with eU content (244–1098 ppm and 402–4615 ppm), suggesting that the observed age dispersion can be attributed to the effect of radiation damage accumulation on 4He diffusion. Correspondence between ZHe ages from sandstones and granites indicates that surrounding sedimentary rocks and igneous intrusions supplied sediment to the Cretaceous–Paleogene Fengzhou Basin lying adjacent to the LUOF. The concordance of apatite fission track (AFT) central ages (61–54 Ma) and unimodal distributions of confined track lengths of five samples from different rock units suggest that both sandstone and granite samples experienced a similar cooling history throughout the entire apatite partial annealing zone (~110–60 °C). Apatite (U-Th-Sm)/He (AHe) ages from six non-mineralized samples range from 67 to 19 Ma, with no apparent correlation to eU content (2–78 ppm). Thermal history modeling of data suggests that the LUOF experienced relatively rapid Early Cretaceous cooling. In most samples, this was followed by the latest Early Cretaceous–Late Cretaceous reheating and subsequent latest Late Cretaceous–Recent cooling to surface temperatures. This history is considered as a response to the transmission of far-field stresses, involving alternating periods of regional compression and extension, related to paleo-Pacific plate subduction and subsequent rollback followed by Late Paleogene–Recent India–Asia collision and associated uplift and eastward extrusion of the Tibetan Plateau. Thermal history models are consistent with the Fengzhou Basin having been significantly more extensive in the Late Cretaceous–Early Paleogene, covering much of the LUOF. Uranium ore bodies which may have formed prior to the Late Cretaceous may have been eroded by as much as ~1.2 to 4.8 km during the latest Late Cretaceous–Recent denudation.

Sign in / Sign up

Export Citation Format

Share Document