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in situ leaching after blasting uranium

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 ...

 — 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 …

 — The metal can be recovered from it in a concentrated form after leaching. A lixiviant solution may be acidic or basic in nature. If calcium is present in ore-body, carbonate alkaline leaching is often preferred, otherwise acid is mostly used. In-situ leaching generally involves extraction of minerals or metals from the undisturbed ore in …

 — 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 .

 — In situ leaching (ISL) is becoming the main mining practice for sandstone-type uranium deposits in China. The key to ISL technology is to aid the leaching solution in contacting the ore bed over a large range, which will induce a series of chemical reactions to extract uranium; thus, it is essential to thoroughly understand the reservoir physical …

 — 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. …

The cover picture shows the in situ uranium central processing facility, Hobson Uranium Project, Everest Mineral Corporation, Karnes County, Texas, United States of America.

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

 — 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 ...

First used in Wyoming in the 1950s, in-situ leaching (ISL) mining accounts for most uranium production in the United States. In situ leaching – what it is. ISL involves injecting chemicals, called "lixivants" into an aquifer that contains a uranium ore body (i.e. deposit).

 — 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 …

 — 3D reactive transport model is an efficient tool to simulate uranium ISR operation: indeed the whole process is based on reacting fluid circulation in porous media. The simulation can help quantify the processes at …

 — 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.

 — 1. Introduction. The uranium mining industry plays a crucial role in accelerating the global energy supply and economy growth (Yin et al., 2019).As a result, many approaches have been developed over the years to cost-effectively and sustainably exploit large reservoirs of uranium (Zhou et al., 2020).Acid in-situ leaching (AISL) is …

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 …

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 ...

 — 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 …

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 ...

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 u …

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 …

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 ...

In situ leach (ISL) technology is an innovative and recently utilised mining alternative. It is recognized as having economic and environmental advantages when properly employed by knowledgeable specialists to extract uranium from suitable sandstone type deposits.

 — 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 …

 — 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 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.

 — 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 …

In situ leach or leaching (ISL) or in situ recovery (ISR) mining has become one of the standard uranium production methods. Its application to amenable uranium deposits (in certain sedimentary formations) has …

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 …

 — 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...

DOI: 10.1016/j.net.2023.03.034 Corpus ID: 258287254; Reformability evaluation of blasting-enhanced permeability in in situ leaching mining of low-permeability sandstone-type uranium deposits

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