Column Bioleaching Experiment of Low Grade Uranium Ore from Xiangshan Uranium Deposit

2013 ◽  
Vol 825 ◽  
pp. 314-317
Author(s):  
Jin Hui Liu ◽  
Ya Jie Liu ◽  
Zhi Hong Zheng ◽  
Xue Gang Wang ◽  
Yi Peng Zhou ◽  
...  
Keyword(s):  
Uranium Concentration ◽  
Rock Type ◽  
Uranium Deposit ◽  
Acid Leaching ◽  
Uranium Content ◽  
Low Grade ◽  
Particle Sizes ◽  
Uranium Recovery ◽  
Uranium Ore ◽  
Acid Consumption

Xiangshan uranium deposit is the largest volcanic rock type uranium ore in China. Great number of low grade uranium ore (U < 0.03%) was stacked in the tailings dam as a waste rock in more than 50 years of exploitation, resulted in uranium resources waste. Two group column bioleaching experiments (column AB) were carried on in order to investigate uranium recovery effect by microbial for the low grade uranium ore. The bacteria for the tests was a mixture mainly composed by Acidithobacullus ferrooxidans and Leptospirrillum ferriphilum, which was isolated from the uranium minerals of Xiangshan uranium deposit and domesticated with the mineral and leachate system. The average uranium content is 0.0123%, the particle sizes for column A and B is less than 25mm The Fe2+, Fe3+ and F- average contents of the test minerals were 1.90%, 0.59% and 0.14% respectively. Results showed that uranium leaching rate calculated by uranium concentration of slag were 76.75%, 75.31% in 95days and 85 days of test column A, B respectively. Rate of acid consumption of column test A, B were 7.60% and 7.69% respectively. while the rate of acid consumption was usually more than 10% by acid leaching. These evidences suggested that microbial hydrometallurgical technology was had effective for the low grade uranium ore and significant on uranium recovery for the low grade uranium ores.

scholarly journals Continued Multicolumns Bioleaching for Low Grade Uranium Ore at a Certain Uranium Deposit

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Gongxin Chen ◽  
Zhanxue Sun ◽  
Yajie Liu
Keyword(s):  
Low Grade ◽  
Exchange System ◽  
Uranium Recovery ◽  
Industrial Facilities ◽  
Uranium Ore ◽  
Bacteria Growth ◽  
Acid Consumption ◽  
High Fluoride ◽  
Cost Of Production ◽  
The Cost

Bioleaching has lots of advantages compared with traditional heap leaching. In industry, bioleaching of uranium is still facing many problems such as site space, high cost of production, and limited industrial facilities. In this paper, a continued column bioleaching system has been established for leaching a certain uranium ore which contains high fluoride. The analysis of chemical composition of ore shows that the grade of uranium is 0.208%, which is lower than that of other deposits. However, the fluoride content (1.8% of weight) is greater than that of other deposits. This can be toxic for bacteria growth in bioleaching progress. In our continued multicolumns bioleaching experiment, the uranium recovery (89.5%) of 4th column is greater than those of other columns in 120 days, as well as the acid consumption (33.6 g/kg). These results indicate that continued multicolumns bioleaching technology is suitable for leaching this type of ore. The uranium concentration of PLS can be effectively improved, where uranium recovery can be enhanced by the iron exchange system. Furthermore, this continued multicolumns bioleaching system can effectively utilize the remaining acid of PLS, which can reduce the sulfuric acid consumption. The cost of production of uranium can be reduced and this benefits the environment too.

The Relationships between Uranium Mineralization and Organic Matter in 373 Uranium Deposit

2014 ◽  
Vol 962-965 ◽  
pp. 203-207 ◽  
Author(s):  
Ping Li ◽  
Zheng Qi Xu ◽  
Ye Wang ◽  
Peng Chong Wang
Keyword(s):  
Organic Matter ◽  
Rock Type ◽  
Uranium Deposit ◽  
Thermal Evolution ◽  
Uranium Content ◽  
Uranium Mineralization ◽  
Pelitic Rock ◽  
Organic Matter Type ◽  
Main Component ◽  
The Relationship

The 373 deposit,as a typical carbonanceous-siliceous-pelitic rock type uranium deposit,is rich in organic matter and pyrite.Close relationships exist between organic matter and uranium mineralization in a lot of uranium deposits. But few people have studied the relationship between uranium mineralization and organic matter of carbonanceous-siliceous-pelitic rock type uranium deposit.The organic matter type of 373 uranium deposit is type-II2.The sources of organic matter are mainly marine plankton,microbial and terrestrial plant. The organic maturity is relatively low,at the immature-low mature stage.Compared with the surrounding rock ,the ore has gone through higher paletemperature on account of hydrothermal and fault. The type and the maturity of organic matter result in the generation of large amount of humic acid during thermal evolution that could be preserved in strata. The contents of chloroform bitumen “A” of organic matter in the mineralized layer are 0.47—10.42ug/g .Asphaltene is the main component of chloroform bitumen “A”.The correlation between chloroform bitumen “A” and uranium content is high,as well as the correlation between the content of asphaltene and uranium content. Study shows that the functions of organic matter in 373 uranium deposit are mainly adsorption,complexation and reduction.

Resin-in-pulp method for uranium recovery from leached pulp of low grade uranium ore

2007 ◽  
Vol 85 (2-4) ◽  
pp. 103-109 ◽  
Author(s):  
Kazem Mirjalili ◽  
Mahshid Roshani
Keyword(s):  
Low Grade ◽  
Uranium Recovery ◽  
Uranium Ore

Preliminary Studies on Acid Leaching of Finely-Ground Malaysian Low Grade Manganese Ore (LGMO)

2016 ◽  
Vol 840 ◽  
pp. 364-368 ◽  
Author(s):  
Mohd Fasyraf Hafizi Mohd Rozali ◽  
Nurulfazielah Nasir ◽  
Suhaina Ismail ◽  
Norazharuddin Shah Abdullah
Keyword(s):  
Sulfuric Acid ◽  
Fine Particle ◽  
Acid Leaching ◽  
Reducing Agents ◽  
Low Grade ◽  
Manganese Ore ◽  
Particle Sizes ◽  
Leaching Process

Ore samples, believed to be low grade manganese ore were characterized using XRD, XRF and SEM, before being ground further into very fine particle sizes going through a preliminary leaching process. Sulfuric acid was chosen as the leachant, and leaching was done without any presence of reducing agents.

Acid leaching of uranium from a low-grade Indian uranium ore deposit

2012 ◽  
Vol 29 (3) ◽  
pp. 165-168
Author(s):  
T. Sreenivas ◽  
N. P. H. Padmanabhan
Keyword(s):  
Acid Leaching ◽  
Low Grade ◽  
Ore Deposit ◽  
Uranium Ore

Comparative Experiments on Acid Leaching and Bioleaching to a Sandstone Type Uranium Ore

2015 ◽  
Vol 1130 ◽  
pp. 247-250
Author(s):  
Jin Hui Liu ◽  
Wei Jun Shi ◽  
Ya Jie Liu ◽  
Yi Peng Zhou ◽  
Zhan Xue Sun
Keyword(s):  
Recovery Rate ◽  
Acid Leaching ◽  
Mining Area ◽  
Ion Concentration ◽  
Uranium Mine ◽  
Ferric Ion ◽  
Uranium Recovery ◽  
Uranium Ore ◽  
Mining Areas

512 uranium deposit, located in the northwest of China, is one of the largest in-situ leaching uranium mine in China. In the last 2 decades, The V cyclothem Deposit in 11 mining areas were successively mined by acid in-situ leaching. The uranium recovery rate in the roll body was very high, in contrast it was very low in wing body. To compare the efficiency of uranium recovery in No.11-3 mining area, in which the uranium recovery rate was less than 40% by acid leaching in more than 10 years, acid leaching and bioleaching experiments in lab scale were carried out respectively with a native mix cultures isolated and domesticated with the raffinate from this uranium ore in this paper. The experiments mainly focused on the influences of acidity and ferric ion concentration of the solution to uranium recovery. 12 flask bioleaching tests were set up with acidity of 2g/L, 3.5 g/L and 5 g/L , while ferric ion concentration of 0 g/L, 2g/L, 3.5 g/L, and 5 g/L，respectively. The results showed that the average bioleaching rate was 9.8% higher than that of acid leaching. And when the tailings after acid leaching was leached by bacteria culture, uranium concentration in the solution was 115.74% higher than that when in acid leaching. The average leaching rate of uranium increased 5.7%. It concluded that bioleaching is better than acid leaching to this type of minerals.

scholarly journals Uranium Traps in Phreatic Sandstone-type Prospect, Taunsa Area, Dera Ghazi Khan, Eastern Sulaiman Range, Pakistan: Evidences from Autoradiography and Optical Microscopy

2020 ◽  
Vol 11 (1) ◽  
pp. 65-71
Author(s):  
Rahman Ullah ◽  
Nie Fengjuin ◽  
Zhang Xin ◽  
Zhang Chengyong ◽  
Asim Ali ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Microscopy ◽  
Black Shale ◽  
Late Miocene ◽  
Uranium Concentration ◽  
Uranium Deposit ◽  
Thin Sections ◽  
Uranium Ore ◽  
Eastern Limb ◽  
Siwalik Group

Taunsa uranium occurrence like other uranium resources in Pakistan is hosted by the Late Miocene-Pliocene age Litra Formation of the Siwalik Group molasse sediments. Taunsa uranium prospect is a unique phreatic-type uranium resource in terms of its disturbed geological setting of the eastern limb of the Zindapir anticline in the eastern Sulaiman range. Autoradiography technique was used to locate the spots of anomalous uranium concentration in thin sections from ore of Taunsa prospect. Twenty polished thin sections from uranium ore ranging from 200 ppm-600 ppm were attached to detectors for a month which produced prominent alpha track which were used to find the traps of uranium. Subsequently, these spots were studied under SEM and EPMA for further investigations of uranium phases. Autoradiography revealed that Taunsa uranium ore is mostly associated with organic matter (probably petroleum), black shale clasts, biotite, fougerite (a green colour rusty mineral) and with micritic clasts. This study suggests that prospective facies of the host sandstone containing relatively abundant black shale clasts, organic matter and biotite may be targeted during exploratory drilling in Taunsa uranium deposit and its extensions in the eastern limb of Zindapir anticline

Enhance Column Bioleaching of Uranium Embedded in Brannerite by a Mesophilic Acidophilic Bacteria

2015 ◽  
Vol 1130 ◽  
pp. 436-439
Author(s):  
Xue Gang Wang ◽  
Jiang Li ◽  
Zhan Xue Sun ◽  
Ya Jie Liu
Keyword(s):  
Consumption Rate ◽  
Southern China ◽  
Uranium Content ◽  
Chemical Oxidation ◽  
Uranium Mine ◽  
Uranium Recovery ◽  
Chemical Leaching ◽  
Acidophilic Bacteria ◽  
Acid Consumption ◽  
Recovery Percentage

The column chemical leaching and bioleaching methods recovery of uranium from one uranium ore containing brannerite under the some conditons were investigated. The brannerite ore sample taken from one uranium mine in southern China, the ore particle size was crushed to -5mm, the uranium content is 0.281%. The leaching duration lasted 120 days, the acid consumption rate were 7.82% and 7.79% by ore weight, the slag uranium leaching rate were 89.32% and 91.46% that calculated by its residue has been recovered. This work has indicated that column bioleaching can enhance 2.14% uranium recovery percentage than chemical oxidation leaching, bioleaching be the promising method for uranium extraction from refractory brannerite ore in the deposit.

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