Mining

Barrick Goldstrike Roaster Facility Roasting and Gas Handling

A. Cole, J. McMullen

The roasting and gas handling circuits at Goldstrike's new Roasting Facility incorporate proven technologies in a unique combination. The objective was to recommend the most robust and economical process for Goldstrike's carbonaceous resources and optimize roast conditions based on prior extensive testing. A series of pilot plant campaigns were conducted using Freeport-McMoRan's whole ore roasting

Roasting developments: especially oxygenated roasting

K G Thomas, A P Cole

Roasting of refractory gold ores is a crucial commercial process utilized to treat various refractory gold ores and concentrates, aimed at altering the physical, chemical, and mineralogical properties of the ore constituents. This study examines the effectiveness of different roasting configurations, such as single- and two-stage fluid bed roasters, which process ores under varying conditions to o

Sustainable Copper Production Based on Fluid-Bed Roasting Technology

M. Wrobel, J. Hammerschmidt

Fluid-bed technology plays a crucial role in the pyrometallurgical processing of various ores and concentrates. This paper discusses the extensive research and development by Metso Outotec over the past 50 years to broaden the applicability of fluid-bed technology in copper production. Specifically, it highlights processing routes that include partial, sulfate-producing, and dead roasting, with a

Extraction of copper from complex carbonaceous sulfide ore by direct high-pressure leaching

Labone L. Godirilwe, Refilwe S. Magwaneng

The increase of impurities and complexity of copper ores are among the recent challenges in the mining industry. Complex carbonaceous sulfide ores are extremely difficult to treat due to their mineralogical complexity and impurities of organic carbon and carbonates. This study focuses on the development of a hydrometallurgical process for efficient copper extraction from complex carbonaceous sulfi

OPTIMISATION DES PARAMETRES DE FILTRATION EN VUE DE REDUIRE L’HUMIDITE DU CAKE D’HYDROXYDE DE COBALT DE 68% A 60%

TSHINYEMBA KANDALA Fils, NGAMBA MIMBO Guelord

Cette étude vise à optimiser les paramètres de filtration afin de réduire l'humidité du cake d'hydroxyde de cobalt de 68% à 60% dans le cadre de l'usine Mutanda Mining. Une approche statistique a été adoptée pour développer un modèle mathématique contrôlant l'humidité à la sortie des filtres presses, en évitant les baisses de production liées aux pannes des séchoirs causées par des bouchages de la

Leaching Practices at Mantos Blancos

G. Tapia, R.J. Kelley

Empresa Minera de Mantos Blancos S.A. operates two copper mines in Chile: Mantos Blancos and Mantoverde. This study aims to define the leach processes suitable for each ore type by conducting extensive metallurgical testwork during the feasibility study of both projects. The methodology involved the selection of a combination of heap and dump leaching for Mantoverde, while a modified vat leach ope

HYDROCOPPERTM- ECONOMICAL TREATMENT FOR COPPER AND GOLD CONCENTRATES AT THE MINE SITE

Olli Hyvärinen, Pertti Lamberg

The HydroCopperTM process, developed by Outokumpu Technology, introduces a novel chloride leaching method for the efficient treatment of copper sulphide concentrates directly at the mine site, aiming to enhance copper production and facilitate the utilization of low-grade ores. This study investigates the feasibility of the HydroCopperTM technology, which not only allows for the extraction of high

CURRENT STATUS OF COPPER LEACHING AND RECOVERY IN THE U. S. COPPER INDUSTRY

W. Joseph Schlitt

This chapter reviews the current status of copper leaching and recovery operations in the United States, highlighting the significance of these techniques within the copper industry. The objective is to analyze the contributions of leach operations to total mine output and provide a comprehensive understanding of the evolution of these processes. Methodologically, the text employs a historical per

Copper-Gold Interaction During the Processing of Copper-Gold Ores

T Tran, H H Nguyen

The treatment of copper-gold ores presents significant challenges due to the interaction between copper minerals and cyanide leach solutions, which complicates gold recovery. This study seeks to elucidate the specific mechanisms behind this interaction, focusing on the role of various copper minerals such as azurite and chalcocite, whose dissolution in cyanide exacerbates the consumption of cyanid

Copper heap leaching at San Manuel

J.G. Jenkins

This paper discusses the development and operation of Magma Copper Company's heap leaching facility at San Manuel, which has been operational since May 1986. The objective of the study was to evaluate the feasibility and efficiency of copper extraction from the oxide ore body of the San Manuel deposit, particularly as it became available for development in the early 1980s. A comprehensive testing

HEAP LEACHING TECHNIQUE in MINING Within the Context of BEST AVAILABLE TECHNIQUES (BAT)

Caner Zanbak

This document provides an overview of heap leaching, a mining technique crucial for the economic extraction of certain ores that may otherwise remain unexploitable. The objective is to present heap leaching within the framework of Best Available Techniques (BAT) as established by European regulations. A comprehensive methodology employed includes gathering insights from industry experts and litera

Ammonia Leaching: An Alternate Route for Copper Recovery

Xu Chuanhui, R Newell

The use of ammonia as a leaching agent in the recovery of copper from ores and concentrates has a number of potential benefits, including the ability to treat ores with acid-consuming gangue, non-corrosivity, the insolubility of iron in solution, and increased selectivity. This paper reviews both historical and contemporary applications of ammonia-based leaching systems for copper recovery and pre

new players in copper concentrates hydromet

Alan Taylor

The increasing concerns regarding the transportation and smelting of copper sulphide concentrates with high impurity levels, particularly arsenic, have led to the emergence of new hydrometallurgical processes aimed at impurity removal rather than complete hydromet processing. This paper discusses the NONOX process, which utilizes a combination of copper metathesis and hydrothermal leach mechanisms

OZ MINERALS A modern mining company

This presentation by OZ Minerals Limited provides an overview of the company's operations and recent developments in mining. The objective is to convey information regarding the Carrapateena Mineral Resource estimate and associated production targets, alongside evaluations of Prominent Hill Mineral Resources and Ore Reserves. The methodology includes a detailed assessment of mineral resources and

sustainability 11 03347

Thriveni Thenepalli, Ramakrishna Chilakala

Heap leaching is a low-cost technology used in industrial mining to recover precious metals such as gold and uranium, along with several other highly sought after metals like copper, from their primary resources (ores and minerals). For many decades, there has been a growing demand for heap leaching due to its environmental benefits. Heap leaching provides mining operators with a benign, effective

Minerals 2026, 16, 216

Pouya Nobahar, Chaoshui Xu

The growing global demand for mineral resources is challenging mining operations to maintain productivity while processing lower-grade ores and increasingly complex deposits. This study presents an integrated framework that leverages machine learning (ML) and high-fidelity simulation to model and support scenario-based decision-making for the blasting–crushing–SAG (Semi-Autogenous Grinding) millin

Dry Stacking of Filtered Tailings for Large-Scale Production Rates over 100,000 Metric Tons per Day: Envisioning the Sustainable Future of Mine Tailings Storage Facilities

Carlos Cacciuttolo, Edison Atencio

Communities and authorities have been dismayed by globally recorded tailings storage facility (TSF) failures in recent years, which have negatively affected the safety of people and the integrity of the environment. In this context, obtaining the social and environmental license to operate TSFs has become a challenging process for mining companies. This has promoted the trend of using mine tailing

A Brief Note on the Heap Leaching Technologies for the Recovery of Valuable Metals

Thriveni Thenepalli, Ramakrishna Chilakala

Heap leaching is a low-cost technology used in industrial mining to recover precious metals such as gold and uranium, along with several other highly sought after metals like copper, from their primary resources (ores and minerals). For many decades, there has been a growing demand for heap leaching due to its environmental benefits. Heap leaching provides mining operators with a benign, effective

Advances in Mineral Processing of Hard-Rock Lithium Ores: A Comprehensive Review

E. Petrakis, I. Alexopoulos

Lithium, known as the energy metal of the twenty-first century, has become a fundamental element due to its recent use in rechargeable lithium-ion batteries and electronic devices. It is anticipated that the global demand for lithium will be more than quadruple, from around 700,000 metric tons in 2022 to over 3 million metric tons in 2030. Lithium resources exist in different deposits, including b

An overview of coarse particle beneficiation of lithium ores

Philipa A. Opoku, Bogale Tadesse

The increasing demand for lithium-ion batteries, particularly for electric vehicles, underscores the importance of improving the sustainability of lithium mining operations. The objective of this review is to evaluate the feasibility, potential benefits, and challenges of integrating various beneficiation methods, including ore sorting, dense media separation, magnetic separation, and fluidized be

A Systematic Review on the Application of Machine Learning in Exploiting Mineralogical Data in Mining and Mineral Industry

Mohammad Jooshaki, Alona Nad

Machine learning is a subcategory of artificial intelligence, which aims to make computers capable of solving complex problems without being explicitly programmed. Availability of large datasets, development of effective algorithms, and access to powerful computers have resulted in the unprecedented success of machine learning in recent years. This powerful tool has been employed in a plethora of

VALORISATION DE LA PYRITE CONTENUE DANS LES REJETS DE SPHALERITE (CAS DU CONCENTRATEUR DE KIPUSHI CORPORATION)

NKONGAL A NTAMBU Glory, MASIALA Jacob

Ce travail s'inscrit dans une démarche de valorisation des rejets miniers en particulier ceux issus de la flotation de la sphalérite au sein du concentrateur de Kipushi Corporation (KICO). L'objectif principal est de récupérer la pyrite (FeS₂), un minéral sulfué de fer et de soufre, dont la valorisation présente un intérêt industriel croissant, notamment dans les procédés pyrométallurgiques comme

HYDROMETALLURGY CONFERENCE 2009

Matthew Jeffrey

The Hydrometallurgy Conference 2009 aimed to bring together experts in the field to discuss recent advancements in hydrometallurgical processes, particularly focusing on gold extraction. The objective was to share innovative research findings, methodologies, and practical applications related to the processing of gold and other base metals using cyanide and alternative leaching agents. The confere

Membranes and minewater – waste or revenue stream

Stephen P. Chesters, Phil Morton

Membrane technologies are capable of treating mine waste waters to produce clean permeate water for reuse and a concentrate stream that can be used for valuable metals recovery. In this paper, the authors have researched and identified 363 mines with potential to use reverse osmosis (RO), nanofiltration (NF), and ultrafiltration (UF) membrane technology. There are sixty-seven operational membrane

Bioleaching An Important Approach for Me

D. M. Musa, U. O. Ujih

Bioleaching is a new method of refining minerals from their parent ores in order to obtain the required metal using naturally occurring microorganisms. These microbes are naturally attached to the mineral ores; they used inorganic carbon as their source of carbon and flourished in a low pH environment, usually activated and cultured in irrigated heap and stirred tank reactors. The environment with

Microanalyser Prototype for On-Line Monitoring of Copper(II) Ion in Mining Industrial Processes

Karla Victoria Guevara Amat ó n, Pedro Couceiro

A microanalyzer prototype for copper(II) ion monitoring in mining industrial processes is presented. The microanalyzer is designed as an assembly of different modules, each module being responsible for a unit operation. In order to optimize the industrial processes, the microanalyzer can automate all sample management, signal processing, and mathematical calculations and wirelessly transfer data t

A study of the electrochemical dissolution and passivation phenomenon of roasted gold ore in cyanide solutions

Ahmet Deniz Basa, Wei Zhanga

This study investigates the electrochemical interactions between gold and its associated oxide minerals either in one (OC) or two separate containers (TC) in the presence or absence of slurry. Magnetite showed a negative effect on gold leaching, while maghemite and hematite demonstrated a positive effect, relatively. The presence of slurry generally resulted in lower current densities. However, wh

Percolation Leaching: The status globally and in Southern Africa

Amado Guzman, Jochen Petersen

This document discusses the current status of percolation leaching both globally and specifically within the context of Southern Africa. The objective is to provide a comprehensive overview of the principles, advancements, and operational challenges related to heap leaching processes. The methodology involved the analysis of various technical presentations from reputable experts in the field, spec

URANIUM MINING IMPACTS ON WATER RESOURCES IN BRAZIL

Francisco Fernando Lamego Simões Filho, Liliane F Silva

Uranium mining and milling activities started operations in Brazil during the 80´s. The first production Center was deployed in Poços de Caldas (CIPC) State of Minas Gerais. The mine was exhausted in 1997, after has produced only 1200 t of U3O8. The second uranium plant began the operations in Caetité (URA), Bahia State, since 1999 and keeps operations until now with an annual U3O8 production of u

Rare-earth elements in uranium deposits in the municipality of Pedra, Pernambuco, Brazil

Kennedy Francys Rodrigues Damascena, Romilton dos Santos Amaral

In the present study, soil and rock samples were collected from uranium deposits in the city of Pedra, Pernambuco, Brazil. These samples were analyzed using neutron activation analysis to identify the occurrence of rare-earth elements (REE). The most abundant elements found were Ce, Nd and La, with concentrations 12 times higher than the average in the earth's crust and 4.6 times higher than value

Preliminary assessment of uranium mining legacy and environmental radioactivity levels in Sabugal region, Portugal

Fernando P. Carvalho, João M. Oliveira

An environmental radioactivity survey carried out in the Sabugal region, Portugal, showed enhanced radioactivity levels in surface water streams related to water discharges from old uranium mines. Water from irrigation wells in this region displayed variable radionuclide levels due to natural occurrence of radionuclides and to contamination by mine water drainage. Horticulture products grown near

Epidemiological Study of the Effects of Uranium Mining Residues

F.P. Carvalho, M.J. Madruga

This study, part of the MinUrar project, investigates the radioactive contamination and exposure levels in areas affected by uranium mining and milling, focusing on implications for public health. The objective was to assess the presence of radioactive materials and their impact on local populations. Methodologically, the study involved multiple field sampling campaigns conducted in select countie

Environmental Impact of Uranium Mining and Ore Processing in the Lagoa Real District, Bahia, Brazil

ILSON G. CARVALHO, ROSA CIDU

Uranium mining and processing at Lagoa Real (Bahia, Brazil) initiated in 2000, prompting an investigation into its environmental repercussions. This study aimed to assess the hydrogeochemical quality of water resources in the area. Hydrogeochemical monitoring was conducted from 1999 to 2001, revealing generally satisfactory water quality inside and outside the mineralized zone, with no observed ch

ENVIRONMENTAL IMPACT ASSESSMENT OF A RADIOLOGICAL UNIT OF ORE PROCESSING, AT CALDAS, MG, BRAZIL

Wagner de S. Pereira, Delcy de A. Py Júnior

This study aims to estimate the radiological impact on the environment (RIE) from the release of water treated by the ore processing unit (UTM) at Caldas, MG, during the years 2005 and 2006. In 2005, the UMT operated 400 tons of monazite in a process to obtain rare earths; during the following year there was no industrial process. The effluent waters were tested once a week for points 014 and 025,

Cluster analysis to evaluate stable chemical elements and physical - chemical parameters behavior on uranium mining waste.

Wagner de Souza Pereira, Gustavo Ferrari de Morais

The Ore Treating Unit (UTM) is a deactivated uranium mine. A cluster analysis was used to evaluate the behavior of stable chemical elements and physical-chemical parameters in their effluents. The utilization of the cluster analysis proved itself effective in the assessment, allowing the identification of groups of chemical elements, physical-chemical parameters, and their joint analysis (elements

A code of practice to control TENORM impact of the non-uranium mining industry

Horst Monken Fernanndes, Elaine R.R. Rochedo

It is recognized that non-uranium mining and milling activities have the potential to cause undesired environmental impacts. These impacts can be observed during the operational and post-operational scenarios. A survey effort was developed to assess these impacts in several mining industries in Brazil. In each industry, the operational process was examined in detail, samples were collected at each

Application of the fundamental parameter method to the assessment of major and trace elements in soil and sediments from Osamu Utsumi uranium mine by WDXRF

Sabine Neusatz Guilhen, Marycel Elena Barboza Cotrim

Wavelength dispersive X-ray fluorescence spectrometry (WDXRF) is a suitable technique for the characterization of contaminated mining sites, providing a quick and reliable screening for areas of significant contamination. This study established and validated a non-destructive methodology for quantitative simultaneous determination of major and minor constituents in soil and sediments by WDXRF, whi

Assessment of environmental impact of mining and processing of uranium ore at Jaduguda, India

A.H. Khan, S.K. Basu

Uranium ore from three underground mines located within a distance of 12 km is mined and processed by the Uranium Corporation of India Ltd (UCIL) in the mill at Jaduguda in eastern India. Management of mine water, mill tailings, and the effluents from the tailings pond is given due importance during the mining and ore processing operations. Radon released from the mines exhausts and emanating from

Environmental Control in the Uranium Mine Lagoa Real, Brazil

FABIO SILEnO TAGLIAFERRO, ELISABETE A. DE NADAI FERNANDES

Uranium production in Brazil will be restarted in the year 2000, through exploration of the Jazida da Cachoeira, located in the uraniferous region of Lagoa Real, Bahia State. Because of the mining operations, an open cast mine of approximately 27 x 104 m 2 will be produced and the material removed will constitute approximately 14  106 tons, occupying an estimated area of 50 x 104 m 2. Currently,

Environmental impact assessment of uranium mining and milling facilities: A study case at the Pocos de Caldas uranium mining and milling site, Brazil

Host M. Fernandes, Lene H.S. Veiga

This paper presents a critical analysis of the environmental responses to the releases of radionuclides and metals from the uranium mining and milling facilities of Pocos de Caldas into surface waters. An evaluation of groundwater contamination due to the migration of seepage water from the tailing dam was also performed. The study was based on monitoring data. It is shown that tailing dilution is

Natural Attenuation of Acid Mine Drainage by Various Rocks in the Witbank, Ermelo and Highveld Coalfields, South Africa

E. Sakala, F. Fourie

In the Karoo coalfields, mining operations that release acid mine drainage (AMD) are threatening groundwater resources. An important parameter controlling the extent and severity of AMD impact is the natural attenuation of rocks in response to AMD. This study aims to fill the research gap regarding the response of Karoo rocks in saturated and unsaturated conditions. Laboratory column leach experim

Evaluation of selected static methods used to estimate element mobility, acid-generating and acid-neutralizing potentials associated with geologically diverse mining wastes

Philip L. Hageman, Robert R. Seal

This study investigates the effectiveness of various static methods for estimating element mobility and the acid-generating and acid-neutralizing potentials in mining waste characterized by geological diversity. The objective was to assess the reliability of standard versus simplified leaching and acid-base accounting methods in predicting acid mine drainage (AMD) potential. Various leaching tests

Evaluating the Acid Mine Drainage Potential at Abosso Goldfields Limited (AGL), Ghana

J. S. Kuma, D. N. Asamoah

Occurrence of Acid Rock Drainage (ARD) affects both plants and animals that are present in a drainage system. In some base metal and coal mining environments, the presence of sulphide minerals especially pyrite and their exposure to oxygen and water may trigger Acid Mine Drainage (AMD). Evaluation of the potential for acid generation is therefore very important in any mine setting where sulphide m

Determining Acid and Metalliferous Drainage Potential of Waste Rock on a Mine

S. Fosu, C. Owusu

Acid and Metalliferous Drainage (AMD) is recognised as a serious environmental problem in the mining industry, posing threats to water quality, vegetation cover and social licenses of mining operations. This study aimed to determine the AMD potential of fifty (50) waste rock samples from a mine utilizing Acid Base Accounting (ABA) techniques. Mineralogical studies revealed major sulphide minerals

Uranium, Mining and Hydrogeology

Broder J. Merkel, Andrea Hasche-Berger

This document provides an overview of uranium mining, specifically focusing on in situ leach (ISL) mining techniques and their environmental implications. The objective is to critically evaluate the claims made by the nuclear industry regarding the safety and controllability of ISL mining methods. A comprehensive analysis of existing literature is employed to highlight the hidden costs and environ

Simulation of the effects of geochemical reactions on groundwater quality during planned flooding of the Königstein uranium mine, Saxony, Germany

Daniel Biehler, W. Eberhard Falck

Uranium mining in southeastern Germany resulted in significant environmental risks. Closure of the mines and subsequent rises of water levels may result in heavy-metal and radionuclide-bearing mine waters penetrating aquifers that are used for water supply. While there are certain (geo-)technical constraints on the schedule with which flooding of the mines can proceed, this process must not result

Impact of Uranium Mines Closure and Abandonment on Groundwater Quality

Nada Rapantova, Monika Licbinska

The aim of the study is to assess the evolving mine water quality of closed uranium mines in the Czech Republic. This paper focuses on the changes in mine water quality over time and spatial variability. Systematic monitoring of mine water quality was performed in 2010 at all available locations of previous uranium exploitation. Gravity flow discharges and shafts were sampled, considering multiple

The uranium ore from Mina Fe (Salamanca, Spain) as a natural analogue of processes in a spent fuel repository

L. Pe´rez del Villar, J. Bruno

In the frame of the ENRESA natural analogue programme, the uranium ore from the ‘Mina Fe’ (Salamanca, Spain) has been studied as a natural analogue of radioactive spent fuel behaviour. This uranium mine is hosted in highly fractured schistose rocks, a geological setting that has not been envisaged in the Spanish options for radioactive waste burial. However, some analogies with the processes that

Prediction of Acid Neutralizing Potential of Wetlands Affected By Gold Mining in a Semi-Arid Area

Julien Lusilao-Makiese, Ewa Cukrowska

South Africa's mining activities play an important role in ensuring the country's position in the global market. Unfortunately, the country’s mining history has also resulted in dramatic environmental consequences, particularly acid rock drainage (ARD) from gold mines of the Witwatersrand. This study aims to predict the acid generation potential from wetland environments affected by gold mining. S

Determination and modelling of geochemical speciation of uranium in gold mine polluted land in South Africa

H. Tutua, E. Cukrowska

The East and Central Rand of the Witwatersrand has been one of the most important gold mining areas in the world. One of the environmental consequences of this mining activity has been the release and distribution of heavy metals into the ground and surface water systems as a result of acid mine drainage arising from oxidation of pyrite (FeS2) in the tailings dumps. The research is aimed at the qu

Laboratory Simulation of Groundwater Along Uranium‑Mining‑Affected Flow Paths Near the Grand Canyon, Arizona, USA

Carleton R. Bern, Kate M. Campbell

Mining of volumetrically small, but relatively enriched (average 0.6% U3O8) breccia pipe uranium (BPU) deposits near the Grand Canyon, Arizona, USA has the potential to affect groundwater and springs in the area. Such deposits also contain base metal sulfides that can oxidize to generate acid mine drainage and release trace metals. In this study, sequential batch experiments were conducted to simu

Percolation Leaching: The status globally and in Southern Africa 2011

D W Dew, G F Rautenbach

This study reviews the global status of percolation leaching, focusing specifically on developments in Southern Africa. The primary objective is to elucidate the mechanisms by which microbial populations facilitate the heap bioleaching of sulfide minerals under elevated temperatures, utilizing iron(III) as the primary oxidant generated through the oxidation of iron(II). Methodologically, the paper

A combined DGT - DET approach for an in situ investigation of uranium resupply from large soil profiles in a wetland impacted by former mining activities

A. Martin, Gilles Montavon

An in situ methodology combining DET and DGT probes was applied in a wetland soil, downstream of a former uranium mine (Rophin), to evaluate metal resupply by calculating the R ratio (R = [U]DGT/[U]pore water) from a high resolution and large (75 cm) soil profile. Our study confirms its applicability in soil layers affected by uranium mining activities. The investigation revealed that the metal re

Flow period influence on Uranium and trace elements release in water from the waste rock pile of the former La Commanderie Uranium mine (France)

A. Martina, C. Landesman

This study investigates the influence of flow periods on the release of uranium and trace elements from the waste rock pile of the La Commanderie Uranium mine in France. The objective is to understand the environmental implications of former mining activities, particularly their impact on local water quality. A combination of field sampling and laboratory analyses was employed to assess uranium co

Arsenic and uranium transport in sediments near abandoned uranium mines in Harding County, South Dakota

Gregory G. Kipp, James J. Stone

Sediment samples were analyzed as part of ongoing environmental investigations of historical U mining impacts within Custer National Forest in Harding County, South Dakota. The objective was to determine correlations between As and U content, grain size, and soil mineralogy to identify contaminant fate and transport mechanisms. Soil samples were collected near the mining source zone and up to 61 k

URANIUM MINING BY IN-SITU LEACHING

A. K. SARANGI, K. K. BERI

Uranium mining through in-situ leaching (ISL) presents a unique approach that combines both efficiency and environmental considerations. This study aims to delineate the technical and economic aspects associated with ISL for uranium recovery. A comprehensive methodology was adopted encompassing field studies and the analysis of existing literature on uranium deposits and ISL processes. The researc

Selecting the rational parameters for restoring filtration characteristics of ores during borehole mining of uranium deposits

Zhiger Kenzhetaev, Kuanysh Togizov

The research purpose is to increase the efficiency of borehole uranium mining by selecting special decolmating solutions and rational parameters of the technology for influencing the seam near-filter zone of geotechnological boreholes, as well as improving the filtration characteristics of the seam, depending on the mineralogical composition of ores and the structure of sediment-forming materials.

Reactive Transport Modeling during Uranium In Situ Leaching (ISL): The Effects of Ore Composition on Mining Recovery

Maksat B. Kurmanseiit, Madina S. T ungatarova

Unconsolidated sandstone uranium deposits exploited by the in situ leaching (ISL) method, contain complex tetravalent and hexavalent uranium compounds, mostly as UO2 and UO3 oxides that have different dissolution rates in sulfuric acid solutions. This work investigates a reactive transport model that takes into account the dissolution of both UO2 and UO3 in sulfuric acid solution together with pos

Modeling of geochemical processes related to uranium mobilization in the groundwater of a uranium mine

P. Gómez, A. Garralón

This paper describes the processes leading to uranium distribution in the groundwater of five boreholes near a restored uranium mine (dug in granite), and the environmental impact of restoration work in the discharge area. The groundwater uranium content varied from less than 1 µg/L in reduced water far from the area of influence of the uranium ore-containing dyke to 104 µg/L in a borehole hydraul

Inherently Safe In Situ Uranium Recovery

J.L. Krumhansl, P.V. Brady

This report discusses the principles and methodology of inherently safe in situ uranium recovery techniques. The objective is to evaluate the various chemical processes and equipment necessary for effective uranium extraction and to assess their environmental impacts. The methodology employed involves detailed analysis of leaching chemistry, with a focus on the selective recovery of uranium from c