in situ leaching uranium

  • In Situ Leach Mining (ISL) of Uranium World Nuclear

    翻译此页The design of ISL wellfields varies greatly depending on the local conditions such as permeability, sand thickness, deposit type, ore grade and distribution Whatever the type of pattern used, there is a mixture of injection wells, to introduce the leach solution to the orebody, and extraction wells with submersible pumps used to deliver pregnant soluUranium Recovery
  • Insitu Leach Uranium Mining Earthworks

    翻译此页in Situ Leaching – What It Is
  • IN SITU LEACHING OF URANIUM

    However, the principal regions of potential uranium recovery by insitu leach mining are the Wyoming Basins, the Colorado Plateau, and the Gulf Coastal Plain of Texas The southern Black Hills and northeastern Colorado, within the Great Plains region, also contain sedimentary uranium deposits that may be amenable to insitu leach mining Leachable uranium deposits are found in sandstones that

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  • Uranium mining by insitu leaching UCIL

    URANIUM MINING BY INSITU LEACHING By A K SARANGI * and K K BERI ** INTRODUCTION: Uranium is commonly understood as a material storing a huge energy and its only commercial application is as nuclear fuel But apart from its uses in nuclear power plants, the possibility of its use in nuclear weapons makes the material of strategic importance and thereby, restricting its free global

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  • IN SITU LEACHING OF URANIUM

    However, the principal regions of potential uranium recovery by insitu leach mining are the Wyoming Basins, the Colorado Plateau, and the Gulf Coastal Plain of Texas The southern Black Hills and northeastern Colorado, within the Great Plains region, also contain sedimentary uranium deposits that may be amenable to insitu leach mining Leachable uranium deposits are found in sandstones that

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  • Insitu Leach Uranium Mining Earthworks

    In situ leaching – what it is ISL involves injecting chemicals, called “lixivants” into an aquifer that contains a uranium ore body (ie deposit ) The chemicals used are typically sulfuric acid or ammonium carbonate Under natural conditions, these ore bodies are localized and the radiation and heavy metals associated with them remain

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  • In Situ Leach (ISL) Mining of Uranium Stanford University

    In Situ Leach (ISL) Mining of Uranium (June 2009) z Most uranium mining in the USA and Kazakhstan is now by in situ leach methods, also known as in situ recovery (ISR) z In USA ISL is seen as the most cost effective and environmentally acceptable method of mining, and Australian experience supports this z Australia's first ISL uranium mine is Beverley, which started operation late in 2000

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  • APP032 InSitu Leach Uranium Mining in the United

    INSITU LEACH URANIUM MINING IN THE UNITED STATES OF AMERICA: PAST, PRESENT AND FUTURE D H UNDERHILL* Nuclear Assurance Corporation, Norcross, Georgia, United States of America Abstract Commercial insitu leach (ISL) uranium mining in the United States began in the mid1970s Both acid and alkaline leach systems were evaluated The difficulty of restoring ground water following acid leaching

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  • In Situ Leach and Conventional UraniumRecovery

    · From 1972 through 1985, uranium recovery in Texas was dominated by conventional mining and milling More recently, companies (licensees) have been using In Situ Leaching (ISL), a process that makes possible the recovery of uranium without disturbing the natural surface, generating dust, or producing waste known as tailings

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  • Uranium mining by insitu leaching UCIL

    URANIUM MINING BY INSITU LEACHING By A K SARANGI * and K K BERI ** INTRODUCTION: Uranium is commonly understood as a material storing a huge energy and its only commercial application is as nuclear fuel But apart from its uses in nuclear power plants, the possibility of its use in nuclear weapons makes the material of strategic importance and thereby, restricting its free global

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  • InSitu Leaching Simulation Uranium Ores

    · A laboratory method for the simulation of insitu leaching of uranium was developed under contract to the Interior Department’s Bureau of Mines Simulation tests using sulfuric acid, ammonium bicarbonate and sodium carbonate as reagents, and hydrogen peroxide as oxidant were carried out with representative ores from Texas and Wyoming The tests not only yielded recovery rates of uranium

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  • Manual of acid in situ leach uranium mining technology

    ISL technology recovers uranium using two alternative chemical leaching systems — acid and alkaline Acid leach is the more widely employed and has historically produced a

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  • Uranium speciation and in situ leaching of a sandstone

    · In situ leaching of uranium is a new technology process which consists of mining, mineral separation and hydrometallurgical The influence parameters of in situ leaching of uranium can be classified as two different categories: one is the technological factors and another is the natural factors

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  • Uzbekistan already fifth uranium producer with

    · Uranium mining is carried out by the ecofriendly method of in situ leaching (ISL) through systems of geotechnical wells constructed on the surface This technology has increased the resource base by bringing into production low grade sandstonetype deposits, processing of which was previously considered uneconomic Today NMMC produces uranium at 20 fields Another 10 are considered to

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  • In Situ Leach (ISL) Mining of Uranium Stanford University

    In Situ Leach (ISL) Mining of Uranium (June 2009) z Most uranium mining in the USA and Kazakhstan is now by in situ leach methods, also known as in situ recovery (ISR) z In USA ISL is seen as the most cost effective and environmentally acceptable method of mining, and Australian experience supports this z Australia's first ISL uranium mine is Beverley, which started operation late in 2000

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  • Uranium in situ leaching IAEA

    Insitu leach uranium mining in the United States of America: Past, present and future 19 DH Underhiil Principles and results of twenty years of blockleaching of uranium ores by Wismut GmbH, Germany 43 R Hähne, G Altmann In situ leaching of uranium in North Bohemia 55 V Benes Insitu leaching of uranium in Bulgaria: Geological, technological and ecological

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  • Insitu Leaching Insitu Recovery | nuclear

    Insitu leaching (ISL), also known as insitu recovery, is a mining process different from the conventional method in that it uses a chemical process to separate the uranium in the earth’s crust from the surrounding rock Insitu is a Latin phrase that translates literally to “on site” or “in position” Insitu leach for uranium has

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  • APP032 InSitu Leach Uranium Mining in the United

    INSITU LEACH URANIUM MINING IN THE UNITED STATES OF AMERICA: PAST, PRESENT AND FUTURE D H UNDERHILL* Nuclear Assurance Corporation, Norcross, Georgia, United States of America Abstract Commercial insitu leach (ISL) uranium mining in the United States began in the mid1970s Both acid and alkaline leach systems were evaluated The difficulty of restoring ground water following acid leaching

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  • Environmental considerations in the situ leach of

    The paper reports results of a postleach study following nearly three years of uranium insitu leaching in a South Texas ore body Wells drilled in strategic locations were logged (including delayed fission neutron (DFN) and gammaray logs) and cored and the recovered core chemically analyzed Overall uranium recovery for the total 119 m (39 ft) ore zone was estimated to be about 70% from

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  • The geological parameters affecting insitu leaching of

    This report contains material presented at the Uranium Leach Conference, which was held in Vail, Colo, August 2527, 1976 The purpose of the presentation was to summarize some important geological concepts to a largely nongeological audience involved in the in situ extraction of uranium from buried uranium ore deposits The major geological feature affecting the leaching of sandstonetype

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  • An Environmental Critique of In Situ Leach Mining

    Uranium In Situ Leaching : The Case Against Solution Mining vii After the ore has been depleted and the maximum degree of uranium extraction achieved, it is good policy and (generally) a legal requirement to restore the water quality of the groundwater system that was mined to it’s premining level That is, remove all of the remaining chemicals from the aquifer and return the uranium and

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  • In situ recovery, an alternative to conventional methods

    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 engineer ing and technological approaches However, the Soviets adopted the acid leach system, while the US specialists employed an alkaline, primarily carbonatebased, system (IAEA, 2001)(Fig 2) The

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  • Uranium recovery from sandstonetype uranium

    · The factors influencing uranium recovery in waterrock systems during acid insitu leaching (ISL) were studied at the Kujieertai uranium deposit in Xinjiang Using an ISL unit, a field leach trial (FLT) had been carried out to test the sequential effects of a leaching solution without oxidant (H 2 SO 4 solution 4–8 g/L) and a leaching solution with oxidant (H 2 SO 4 3–7 g/L, and Fe (III) 2

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  • Uranium Mining in Eastern Germany: The WISMUT Legacy

    This underground mine was switched to insitu leaching in the early eighties: the ore was no longer removed from the deposit, but sulfuric acid was injected into the ore deposit to leach the uranium on site The grade of the ores produced by Wismut in the last years was only around 007% uranium, a comparatively low value Correspondingly, mining cost and amounts of waste and tailings produced