Progress on enhancing seepage-leaching mass-transfer …
We will provide an overview of the main factors influencing the in-situ leaching process in low-permeability ore layers, discussing the technical characteristics of applicable …
Improved uranium leaching efficiency from low …
Previous conclusions regarding ultrasonic leaching may therefore not be applicable to the in situ leaching of low-permeability uranium-bearing sandstone. Although low-frequency vibration has been widely applied in the oil industry to increase oil permeability (Sun et al., 2020), its use in uranium leaching has only been reported by Makaryuk ...
Well-Field Mechanics for In-Situ Mining
Over the last several decades in-situ leach mining has become increasingly popular. Conventional mining produces tailings, runo!, and considerable land disturbance—all requiring signi"cant rehabilitation. ... uranium, copper, gold and silver. Extraction can be accomplished using one of two methods; the well-to-well recovery method discussed ...
In situ leaching of copper: Challenges and future prospects
In situ leaching offers a potentially attractive way to extract copper from the subsurface without costly fragmentation and processing. Applicability of in situ leaching is limited to deposits where sufficient permeability exists and where the copper and gangue mineralogy is amenable to leaching. A key challenge from past projects is establishing uniform contact …
Evolution of pore structure, fracture morphology and …
Uranium mining technologies include open-pit mining, underground mining and in-situ leaching (ISL) [7, 8]pared to the first two, ISL has many advantages, such as "low production cost, reduced labor intensity, better environmental protection, and high resource utilization" [9], which is becoming the most predominant method of uranium mining [10].
Economic Assessment of an In Situ Leaching Operation …
In situ leaching (ISL) is an attractive technique that enables copper recovery from copper oxide ores that are either low-grade ... 0.4%. The maximum acid consumption values are below 52.5 kg/t, with blasting procedures designed to produce an ore bed ... fully applied in the uranium industry, where it is used to recover uranium from permeable ...
Reformability evaluation of blasting-enhanced permeability …
Reformability evaluation of blasting-enhanced permeability in in situ leaching mining of low-permeability sandstone-type uranium deposits Wei Wang (Key Laboratory of Roads and …
Reformability evaluation of blasting-enhanced permeability …
Results show that medium sandstone, argillaceous sandstone and siltstone exhibit excellent reformability, followed by coarse sandstone and fine sandstone, while the reformability of …
Explosive fracturing mechanism in low-permeability …
The in-situ leaching of uranium requires the formation of a wide-ranging, dense, and highly interconnected fracture network within the ore layer. ... Reformability evaluation of blasting-enhanced permeability in in situ leaching mining of low-permeability sandstone-type uranium deposits. Nucl Eng Technol, 55 (8) (2023), pp. 2773-2784.
Improved FMM for well locations optimization in In-situ Leaching …
DOI: 10.1016/j.2024.04.023 Corpus ID: 269259278; Improved FMM for well locations optimization in In-situ Leaching Areas of Sandstone Uranium Mines @article{Jia2024ImprovedFF, title={Improved FMM for well locations optimization in In-situ Leaching Areas of Sandstone Uranium Mines}, author={Mingtao Jia and Bosheng Luo and Fang Lu and Yihan Yang and …
In-Situ Leaching (ISL)
Acidic In-Situ Leaching of Uranium –Kazakhstan Kazatomprom is the world's largest producer of uranium, representing approximately 22% of total global uranium primary production in 2018. The Group benefits from the largest reserve base in the industry. Kazatomprom operates, through its subsidiaries, joint ventures and associates, 26 deposits
4 Uranium Mining, Processing, and Reclamation
A short description of the in situ leaching/in situ recovery (ISL/ISR) uranium mining technique and other uranium mining techniques are included for completeness, even though, based on current knowledge of known uranium …
Evolution of pore structure, fracture morphology and …
Uranium mining technologies include open-pit mining, underground mining and in-situ leaching (ISL) [7,8]. Compared to the first two, ISL has many advantages, such as "low production cost, reduced labor intensity, better environmental protection, and high resource utilization" [9], which is becoming the most predominant method of uranium mining [10].
A Review of In Situ Leaching (ISL) for Uranium …
This study offers valuable insights into the sustainable advancement of in situ leaching technologies in uranium mining, propelling scientific research and practical applications in the...
A Review of In Situ Leaching (ISL) for Uranium …
This application of BEP in in situ leaching for uranium mining is also referred to as in situ blasting leaching or in situ fragmentation leaching . When applying the BEP technique to low-permeability uranium deposits, a thorough …
Machine learning–based optimal design of the in-situ leaching …
In addition, the repeated use of the reactive transport model (RTM) for investigating the acid in-situ leaching of uranium with the application of the Monte Carlo method leads to a substantial computational load. For this reason, a machine learning (ML)–based surrogate model was developed with the backpropagation neural network (BPNN) method ...
Uranium recovery from sandstone-type uranium deposit by acid in-situ
The researches mentioned above are not focused on the domain of in-situ leaching of sandstone-type uranium, but the fundamentals can still be applied to it. Many experimental studies focused on sandstone type uranium leaching were conducted. The results of a column leaching experiment by Gao et al. (2003) showed that hexavalent uranium ...
Explosive fracturing mechanism in low-permeability …
The in-situ leaching (ISL) has become the mainstream mining method of sandstone-type uranium deposits [15]. This method uses drilling to transport chemical solutions such as strong acids and strong bases to the ore body, allowing the uranium in the ore body to dissolve in the solution, then the uranium bearing solution is smelt for further ...
Geobiology of In Situ Uranium Leaching
Uranium is currently mined via open pit and underground mining as well as with in situ leaching methods, with in situ leaching currently accounting for approximately 45 % of total uranium production.
Process Optimization of an In-Situ Bioleaching Section with …
In-situ uranium leaching with the help of bacteria was carried out in the Standrock Ltd. uranium mine in Elliot Lake, Ontario, Canada even before 1965 [10,11]. ... Through drilling and blasting techniques, the fractured ore block was leached in combination with an on-site bioreactor for Fe 3+ regeneration. Although principal feasibility was ...
In-Situ Leaching & Borehole Mining
Figure 6 A-C shows the three blasting schemes that had been proposed for use of the nuclear device (fig. 6-A) or were being used for in situ leaching in operations such as Ranchers Old Reliable project near Mammoth, Ariz., (fig. 6-B) and for block caving and leaching in mines at Ray and Miami, Ariz., (fig. 6-C).
Experimental investigation on the influence of surfactant to …
Investigating the seepage characteristics of the leaching solution in the ore-bearing layer during the in situ leaching process can be useful for designing the process parameters for the uranium ...
2 IN-SITU LEACH URANIUM RECOVERY AND …
Chapter 2 provides information on uranium recovery using the in-situ leach (ISL) process. The first part of the chapter gives basic information on the type of uranium deposits that are amenable …
Frontiers | Geochemical reactions altering the mineralogical …
The sandstone-type uranium deposit is the main type of uranium resource in China (Yang et al., 2009), its main mining method is in situ leaching, and the uranium output of in situ leaching mining accounts for 90% of China's total natural uranium output in 2021.
In-Situ Leaching & Borehole Mining
Leaching and borehole mining can lower the cutoff grade of ores having appropriate characteristics. Other advantages attributed to in situ mining include low capital …
A Review of In Situ Leaching (ISL) for Uranium
This application of BEP in in situ leaching for uranium mining is also referred to as in situ blasting leaching [126] or in situ fragmentation leaching [129]. When applying the BEP technique to low-permeability uranium deposits, a thorough assessment of the natural burial conditions of the uranium deposit is crucial.
blasting for in situ uranium leaching in south africa
This page is about blasting for in situ uranium leaching in south africa, click here to get more infomation about blasting for in situ uranium leaching in south africa. Shanghai Shibang Machinery CO., LTD.
(PDF) MANAGING THE HORIZON-ORIENTED IN-SITU LEACHING FOR THE URANIUM
This paper summarizes the results of evaluating uranium in-situ leaching (ISL) parameters for hydrogenous deposits in eastern Mongolia. This method, also known as in-situ recovery (ISR) or ...
Electrokinetic in situ leaching of U from low-permeability uranium …
Uranium (U) is a crucial mineral resource that serves as the foundation of nuclear industry development and plays an indispensable role for nuclear power generation and medical applications [1].In situ leaching uranium mining technology is extensively used in the uranium mining process due to its distinctive advantages of minimal surface disturbance, low energy …
In Situ Bioleaching
In situ bioleaching can be used to extract metals such as uranium and copper. In the 1960s, Canada was the first to pour acidic mine water containing iron and sulfur-oxidizing bacteria over the unmined ores in the stope, and inject bacteria-containing acidic mine water in situ into the mined underground uranium deposit, which achieved a good uranium recovery rate and …