The influence of surfactants on the acid leaching process of …
— This article simulates two infiltration leaching processes, atmospheric heap leaching and pressurized in-situ leaching, and explores the effect of surfactant …
Geo-Environmental Models of In-Situ Leaching Sandstone-Type Uranium
— Since the 1990s, sandstone-type uranium in the northern basin of China has become the main target for mining. Uranium mining can cause a series of impacts on the environment. A conceptual model of the geo-environment for sandstone-type uranium in northern China was described, which covers the changes in the geo-environmental …
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.
The influence of surfactants on the acid leaching process of a uranium …
— The permeability of ore is a key factor affecting the leaching effect of uranium ore, and the addition of surfactants can significantly improve the permeability of ore, thereby strengthening uranium ore leaching. This article simulates two infiltration leaching processes, atmospheric heap leaching and pressurized in-situ leaching, and …
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 …
Reformability evaluation of blasting-enhanced permeability in in situ …
— In the process of in situ leaching of uranium, the microstructure controls and influences the flow distribution, percolation characteristics, and reaction mechanism of lixivium in the pores of ...
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
35 No. 9 Uranium Extraction Technology
The cover picture shows the in situ uranium central processing facility, Hobson Uranium Project, Everest Mineral Corporation, Karnes County, Texas, United States of America.
In situ mining through leaching: Experimental …
— Placer mining is useful when minerals from aquatic sediments are exploited, while in situ leaching (ISL) is mainly used for the Sustainability 2022, 14, 12469 3 of 12 recovery of uranium [27, 28 ...
Remediation of uranium in-situ leaching area at Straz Pod …
— Conference: Remediation of uranium in-situ leaching area at Straz Pod Ralskem, Czech Republic ... Over the period of 'chemical' leaching of uranium (ca. 32 years), a total of more than 4 million tons of sulphuric acid and other chemicals have been injected into the ground. Most of the products (approx. 99.5 %) of the acids reactions …
Exploration on the In-situ Leaching of Uranium from Flat …
In order to obtain a desirable muck-pile formation by stope blasting for in-situ leaching and more uniform leaching rate of uranium from flat-dipping ore bodies,some commercial tests were carried out on the in-situ leaching of uranium after stope blasting in a mine by using the following methods and technologies,including muck-pile formation by upward deep …
Electrokinetic in situ leaching of U from low-permeability uranium …
— 1. Introduction. 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 …
Reformability evaluation of blasting-enhanced permeability in in situ …
DOI: 10.1016/j.2023.03.034 Corpus ID: 258287254; Reformability evaluation of blasting-enhanced permeability in in situ leaching mining of low-permeability sandstone-type uranium deposits
Methods and Techniques of Uranium Mining | nuclear …
In open pit mining, overburden is removed by drilling and blasting to expose the ore body, which is then mined by blasting and excavation using loaders and dump trucks. ... In 2012, the percentage of the mined uranium produced by in-situ leach was 44.9 percent. In this technology, uranium is leached from the in-place ore through an array of ...
Reformability evaluation of blasting-enhanced permeability …
— ISL of uranium is a new and unconventional mining method that involves injecting a leaching solution into the porous network of the ore body; extracting uranium …
Acid and ferric sulfate bioleaching of uranium ores: A review
— In-place leaching is similar to in situ leaching but the ore body is fractured by blasting to improve the permeability before the leaching (Wadden and Gallant, 1985). A scheme of possible contributions of microorganisms in uranium solubilization in the indirect in situ leaching with the two-stage approach is shown in Fig. 5 .
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 …
Effects and driving mechanisms of bioremediation on groundwater after
DOI: 10.1016/j.scitotenv.2024.174406 Corpus ID: 270931960; Effects and driving mechanisms of bioremediation on groundwater after the neutral in situ leaching of uranium. @article{Lian2024EffectsAD, title={Effects and driving mechanisms of bioremediation on groundwater after the neutral in situ leaching of uranium.}, author={Guoxi Lian and Yifu …
Uranium recovery from sandstone-type uranium deposit by acid in-situ
— Usually, an in-situ leaching mining area consists of dozens of in-situ leaching units, and each unit consists of five or seven wells, a production well in the center and several surrounding injection wells, forming a "five-spot" or "seven-spot" pattern well field.
The behavior of pyrite during in-situ leaching of uranium by …
— This study contributes to the understanding of the behavior of pyrite during uranium recovery through CO 2 + O 2 leaching. It also contributes to the understanding …
Applicability of in-situ leaching and divided blasting …
PDF | On Jun 3, 2019, AG Sekisov and others published Applicability of in-situ leaching and divided blasting combination | Find, read and cite all the research you need on ResearchGate
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 ...
Quantifying the impact of mineralogical heterogeneity on …
— CO2 + O2 in-situ leaching (ISL) of sandstone-type uranium ore represents the third generation of solution mining in China. In this study, reactive transport modeling of the interaction between hydrodynamic and geochemical reactions is performed to enable better prediction and regulation of the CO2 + O2 in-situ leaching process of uranium. …
Cameco U101
In some circumstances, ore may be mined by in situ recovery, a process that dissolves the uranium while still underground and then pumps a uranium-bearing solution to the surface. Open pit mining. When uranium ore is found near the surface, generally less than 100 metres deep, it is typically extracted by open pit mining.
Reformability evaluation of blasting-enhanced permeability in in situ …
It is essential to evaluate the blasting-enhanced permeability (BEP) feasibility of a low-permeability sandstone-type uranium deposit. In this work, the mineral composition, reservoir physical properties and rock mechanical properties of samples from sandstone-type uranium deposits were first measured. Then, the reformability evaluation method …
Uranium processing
— Uranium processing - Leaching, Extraction, Purification: Roasted uranium ores are leached of their uranium values by both acidic and alkaline aqueous solutions. For the successful operation of all leaching systems, uranium must either be initially present in the more stable hexavalent state or be oxidized to that state in the leaching process. …
A Review of In Situ Leaching (ISL) for Uranium Mining
development of in situ leaching techniques for uranium mining will play a pivotal role in maintaining the long-term sustainability of nuclear energy as a primary clean energy …
Processing of Chloride-Containing Productive Solutions …
the processing of new objects by the method of in situ leaching. The presence of chloride ions suppresses the uranium recovery by anion exchangers [12-14]. The process of uranium sorption by ion exchange resin is the basis of a large amount of technological schemes for reprocessing productive solutions [15 -19]. Therefore, in
In situ recovery, an alternative to conventional methods of …
— In situ recovery (ISR) 2 uranium mining technology was developed independently in both the USSR and in the USA in the late 1950s to early 1960s. It was developed in both countries using similar engineering and technological approaches. However, the Soviets adopted the acid leach system, while the US specialists employed …
Evolution characteristic and mechanism of microstructure, …
ISL is the process of injecting a specific leaching solution into the target uranium deposit using injection wells, leaching metallic uranium through a series of physical–chemical reactions, and lifting the leaching solution out of the surface through production wells to achieve uranium extraction in a surface factory (Kurmanseiit et al ...
Effects and driving mechanisms of bioremediation on groundwater after
The remediation of groundwater subject to in situ leaching (ISL) for uranium mining has raised extensive concerns in uranium mill and milling. This study conducted bioremediation through biostimulation and bioaugmentation to the groundwater in an area in northern China that was contaminated due to uranium mining using the CO2 + O2 neutral ISL ...
Electrokinetic in situ leaching of U from low-permeability …
— In this study, an electrokinetic in situ leaching method for low-permeability uranium ore is proposed. Compared to traditional in situ leaching methods, this process …