矿业, 本领域期刊类期刊, -365足球

apatite is a common accessory mineral observed in alteration zones or sulfide-rich mineralized bodies of neoarchean (ca. 2.7 and 2.5 ga) and paleoproterozoic (ca. 1.88 ga) iron-oxide copper-gold (iocg) deposits from the carajás province. based on in-situ la-icp-ms and epma chemical analyses, combined with cathodoluminescence imaging, we investigate morphological and compositional variations among apatite

the zhaxikang pb-zn-sb-ag-au deposit is situated in the north himalaya metallogenic belt (nhmb), southern tibet, and is unique due to its diverse metal resources. two mineralization events (early pb-zn and late sb) in zhaxikang are controlled by the complex cenozoic tectonic evolution in the himalaya. the ore bodies occur as veins and are hosted primarily by shale interbedded with sandstone and limestone

subsurface energy recovery and storage involves continuous fluid injection into fractured rock formations. the efficiency of these applications highly depends on the evolution of fracture characteristics under thermo-hydro-mechanical (thm) coupled processes induced by fluid injection. in this study, we established a single-fracture thm model to quantitatively analyze the combined and individual contributions

artificial intelligence (ai) has great potential to transform rock mechanics by tackling its inherent complexities, such as anisotropy, nonlinearity, discontinuousness, and multiphase nature. this review explores the evolution of ai, from basic neural networks like the bp model to advanced architectures such as transformers, and their applications in areas like microstructure reconstruction, prediction

a legacy copper mine in sto. niño, barangay ambassador, tublay, benguet, philippines, has generating acid mine drainage (amd), posing environmental and social challenges affecting access to clean water for domestic use in mine-impacted areas. with multiple water sources in the area, classification and prioritization of use, as well as treatment intervention are necessary. this study presents and develops

rock masses in deep underground environments under high in-situ stress often exhibit episodic creep behavior, driven by complex interactions between external perturbation and internal reorganization. the causes of these creep episodes and their link to potential catastrophic failure remain poorly understood. here, we present a novel “endo-exo” framework for analyzing episodic rock creep in underground

fault reactivation during subsurface fluid production pose significant challenges to safe and sustainable resource extraction. this study presents a three-dimensional coupled geomechanical framework to investigate the processes driving fault reactivation, capturing the interactions between reservoir dynamics and geomechanical responses. verification against theoretical estimations based on linear poroelasticity

the inefficient recovery of iron from pyrite cinder (pc), a hazardous iron-rich byproduct of sulfuric acid production, remains a critical challenge due to chemical inertness of hematite and risks of toxic h2s generation. this study proposes a sustainable strategy integrating biomass reductive roasting with oxalic acid-assisted leaching to achieve high-efficiency iron recovery. using coffee shell (cs)

hydrothermal urea hydrolysis has been extensively used for homogenous precipitation processes mainly because the resulting products are generally of high crystallinity, uniform particle size and shape, as well as not generating waste brine. in this study, acid mine drainage water samples from the three witwatersrand goldfields basins (eastern, central and western, gauteng, south africa) were subjected

efficient ore hardness characterisation is pivotal for effective geometallurgical modelling and mine planning. however, conventional bond work index (bwi) tests, despite their established accuracy, are resource-intensive in terms of cost, time, and sample requirements. this article introduces the minibond test, a novel reduced-scale grindability assay designed to provide reliable bwi estimates using

accurate localization of acoustic emission (ae) sources is critical for identifying precursor information of rock failure. however, achieving high localization accuracy in complex rock structures remains challenging. this study presents a novel three-dimensional ae source localization method suitable for rock masses with underground caverns. the proposed approach integrates a sparse-grid octree structure

the development of efficient and environmentally friendly technologies for processing low-grade iron ores is essential to address the depletion of high-grade resources. in this study, a phase transformation process was proposed for the direct conversion of siderite into magnetite under an inert nitrogen atmosphere, without the use of any external reductant. the optimal fluidized roasting condition

the flotation separation of hemimorphite and quartz presents challenges due to their analogous surface characteristics when conventional collectors are used. in this study, potassium dodecyl hydrogen phosphate (pdhp) was systematically evaluated as a highly efficient collector for the selective flotation of hemimorphite and quartz. micro-flotation experiments demonstrated that pdhp displayed remarkably

as the geometallurgy concept gains more visibility, the importance of parameters, in particular, ore texture, in downstream processing performance is increasingly recognized, yet methodologies for fast, unbiased, and automated texture classification remain limited, particularly for complex and low-grade deposits. this study proposes an alternative approach with potential for automated ore texture classification

the fluorite concentrate from the bayan obo ore exhibits low grade with significant impurities including iron, rare earth minerals, and calcium-bearing gangue minerals. this study developed a magnetic purification process by combining high-gradient magnetic separation (hgms) and superconducting magnetic separation (scms) technologies, leveraging magnetic susceptibility differences between fluorite

the agitated reflux classifier (arc) is capable of efficiently separating particles based on density differences. this device has been demonstrated to be effective in the separation of various minerals with density contrasts and has already undergone successful pilot-scale testing for the recovery of ultra-fine and low-grade barite and pyrite. building upon the pilot-scale experiments, this study presents

with the rapid advancement of photoelectric intelligent sorting technology, yolov8-based algorithms for scheelite recognition have been successfully optimized. however, the development of scheelite resources is often accompanied by substantial waste rock accumulation and tailings discharge, which pose significant environmental challenges. this study focuses on the waste rocks obtained after the pre-concentration

the application of the sulfate-reducing bacteria community (srbc) for acid mine drainage (amd) bioremediation has attracted growing interest. however, its potential for in situ suppression of acid generation from mine waste rocks remains unexplored. this study investigates the oxygen-inhibition and acid-control capabilities of srbc using a low-cost carbon source (extract lp and alkali-pretreated peanut

artificial intelligence (ai) is progressively reshaping the landscape of minerals engineering, driving advancements across exploration, mining, and processing. this review systematically examines the current applications of ai in these domains, highlighting its role in optimizing resource estimation, enhancing safety, and improving operational efficiency. through a bibliometric analysis, trends, key

the accumulation of old flotation tailings in majdanpek, serbia, presents significant environmental challenges and highlights the need for innovative, sustainable approaches to metal recovery. this study evaluates the bioleaching potential of the mould aspergillus niger (a. niger) for extracting valuable metals from these tailings. utilizing a batch system with a. niger cultivated in soybean broth

the design of ball mill liners significantly affects the grinding process. however, due to the “black-box effect” within the mill, accurately understanding how liner structure influences ore breakage behavior remains a challenging issue. in this study, a particle breakage model was developed using the discrete element method (dem), with the tavares ufrj model parameters calibrated through uniaxial

the separation of fe from zinc leachate is a critical challenge in zinc hydrometallurgy. while current fe removal methods (e.g., jarosite and goethite precipitation) generate hazardous low-iron wastes, this study presents a novel approach through magnetite precipitation, which offers high fe content (∼72 %) and strong ferromagnetism for effective impurity separation. we systematically evaluated three

nanobubbles (nbs) are gaining prominence in mineral processing due to their ability to enhance mineral separation, reduce reagent consumption and improve overall process efficiency. although the role of surfactants in nb generation and stabilization is well documented, the impact of flocculants, despite their structural similarities and extensive use in mineral systems, has received little attention

in-situ leaching of weathered crust elution-deposited rare earth ores generates substantial ammonium salt residues, which might cause environmental contamination. to address this issue, this study developed a novel gradient elution method combining sequential deionized water and 0.02 mol/l mgcl2 elution, targeting differently bound ammonium fractions for efficient removal. experimental results demonstrated

titanium-bearing blast furnace slag (tbfs) is an important titanium-bearing resource because it contains tio2 over 20%. efficient resource utilization is difficult to achieve because of the common occurrence and complex embedding relationship between ti-bearing components and gangue minerals. pyrometallurgical routes are considered the primary method for tbfs because of their high potential recovery

this study systematically investigates fe-content-induced electronic structures transformation and difference in flotation performance of sphalerite. dft calculations demonstrate that rising fe content narrows the bandgap and reduces the intensity of the cu 3d orbital peak near the fermi level and its hybridization with s atoms in the sphalerite, thereby reducing the reactivity of copper atoms and

temperature is an important factor influencing minerals flotation, particularly when temperature variation over the year is severe. this study investigated the impacts of temperature on adsorption behaviour of sodium oleate (naol) and sophorolipid (sl) on ilmenite surface and the resultant ilmenite floatability. xps and tof-sims results indicated that higher temperatures could strengthen naol and sl

this paper mainly investigates the influence of the size and arrangement of studs on the surface of high-pressure grinding rolls (hpgr) on performance. firstly, the structural principles of hpgr are introduced, and the discrete element method (dem) simulation model simulating the operation of hpgr is established based on the contact model and particle replacement model (prm). then, calibration and

pyrochlore, the primary mineral in niobium-bearing ores, generates diverse surface terminations during comminution, which can influence subsequent froth flotation. using density functional theory (dft) simulations, we evaluated the stability of all possible low-index pyrochlore surface terminations and analyzed their interactions with water and amine collectors. the simulations revealed that oxygen-terminated

our previous research demonstrates the efficient leachability of cadmium (cd) and nickel (ni) from the spent ni-cd batteries by using the glycine-based lixiviant. here, for the first time, we report the separation process of cadmium (cd) and nickel (ni) from the glycine-based aqueous medium via bis-2-ethylhexyl phosphoric acid (d2ehpa) extractant. the effect of pertinent parameters including equilibrium

high-iron bauxite is a vital iron-aluminum symbiotic mineral, primarily processed through the bayer method for alumina extraction. this method generates a substantial quantity of highly alkaline red mud, which possesses significant application potential due to its elevated iron content. however, the iron-bearing minerals in red mud predominantly exist as weakly magnetic hematite, making it challenging

cross-correlated random fields (rfs) are often used to simulate the spatial variability of cross-correlated inputs based on the statistical characteristics of rf like auto-correlation functions, cross-correlation structures, and marginal models. precise estimation of these rf characteristics is often impractical in rock engineering due to limited site-specific data invoking epistemic uncertainties

addressing kiln skin formation during traditional alkali roasting of bayan obo mixed rare earth concentrate (mrec), this study incorporated sintered pellet technology into the mrec alkaline decomposition system and systematically evaluated organic polymer binders under highly alkaline conditions. comparative experiments demonstrated that xanthan gum (xg) exhibits excellent adhesion stability at ph > 14

pyrometallurgical separation is an effective method for processing boron-containing iron concentrate, but the thermal behavior of boron-bearing minerals during roasting remains unclear. the thermal characteristics of boron-containing iron concentrate in a nitrogen atmosphere were systematically studied using synchronous thermal analysis (sta), x-ray diffraction (xrd), scanning electron microscopy-energy

wave-based loading techniques have been proposed as a potential method for the enhancement of permeability in deep reservoirs, yet the mechanisms governing permeability changes in reservoir rocks under repeated stress wave (rsw) loading remain unclear. this study addresses this gap by employing a modified triaxial split hopkinson pressure bar (tshpb) system to simulate coupled hydraulic-mechanical

lithium mixed metal oxides from waste lithium-ion batteries or black mass can be effectively leached at room temperature with mineral acid and controlled addition of reducing agent. but at lower temperature and relatively higher solids loading, the time required for near complete dissolution of the value elements li, mn, co, and ni becomes longer due to the gradual decrease of chemical activity over

scour of rock by flowing water is an integral process in the evolution of natural landscapes as well as a critical hazard for key infrastructure such as dams, spillways, bridges and tunnels. the removal of individual blocks of rock is one of the primary mechanisms by which rock scour can occur. field investigation of a prototype unlined rock spillway site in the sierra nevada mountains in northern

cementation using aluminum or zinc powders is the predominant technique for depositing platinum group metals (pgms) from concentrated solutions, which are obtained by leaching natural ores or secondary raw materials with a combination of strong acids. nevertheless, the efficiency of pgms cementation tends to decline when alternative lixiviants are employed. this study introduces a simple yet highly

the shape of grinding media significantly influences mill performance, including load behaviour, power draw, and toe/shoulder positions. prior research has paid limited attention to the impact of grinding media shape variation on industrial-scale tumbling mill performance. cylindrical shape media produce a narrower desired product size distribution compared to spherical shape media. in the present

shaking tables are essential gravity separation equipment widely used in the mineral processing industry, particularly for fine particle concentration. the rapid development of deep learning techniques has brought notable advances in detecting ore belt demarcation points on shaking tables. yolov8 improves detection efficiency through architectural refinement and the integration of advanced components

coupled static-dynamic loading is a promising technique for enhancing the rock-breaking efficiency of tunnel boring machines (tbms) under hard rock conditions. this study investigates the effects of coupled static-dynamic loading on the rock-breaking characteristics of tbm disc cutters using scaled linear cutting tests and finite–discrete element method (fdem) simulations. scaled test results indicate

brittle instabilities in tunnel excavation can lead to spalling, violent rock ejection, and tunnel collapse. previous experimental studies have primarily investigated brittle tunnel failure using two-dimensional loading, which oversimplifies in-situ stress state. additionally, the mechanism behind the low entry angle of fracturing (i.e., angle of spalling fracture at the tunnel wall) observed in spalling

the orientation of rock discontinuities is a critical parameter for evaluating the stability and safety of rock engineering structures. with the continuous advancement of remote surveying techniques, analysis of exposed rock surfaces based on 3d point cloud data has emerged as a mainstream approach, owing to its high data fidelity and rich geometric information. however, efficiently and accurately

the hydrometallurgical recycling of lithium-ion batteries is a critical area of research, particularly as the demand for these batteries continues to grow. the current work involves using 2 m h2so4 to leach lithium mixed metal oxides from battery waste, with hydrogen peroxide serving as a reductant. this approach is notable for its operation at room temperature and constant solid loading of 10 %, which

fine particle flotation has emerged as a critical area in mineral processing due to increasing demand for resource recovery and the growing presence of ultrafine particles in ore deposits and tailings. these particles, typically smaller than 38 µm, pose significant challenges including low mass, high surface energy, high reagent consumption, and reduced bubble-particle collision efficiency. this review

coal permeability evolution under thermal-mechanical-chemical coupling plays a critical role in underground coal thermal treatment (uctt) and underground coal gasification (ucg). unlike existing models limited to low-temperature applications, this study presents a novel permeability evolution model that integrates key mechanisms including thermal expansion, thermal dehydration, effective stress variation

in order to prepare for the transition from open pit to underground mining, jwaneng mine has undertaken several in-situ stress measurement campaigns in the past 12 years. complex geological conditions at the mine site result in significantly scattered measurement data, making it challenging to interpret a coherent trend for the field stress tensor. to address this issue, this study presents a method

reservoir landslides, driven by rainfall and water level fluctuations, exhibit step-like displacements, posing significant geotechnical risks. this study employs machine learning and data mining to elucidate deformation mechanisms and predict failure times during sudden displacement states, enhancing disaster mitigation. using gps displacement data from three profiles, we quantify factors influencing

the recovery of valuable metals from spent li-ion batteries (libs) has become crucial to mitigate issues related to critical metals extraction and scarcity. the process of separating and purifying li from libs leach solution through electrodialysis (ed) is considered a promising approach for separating monovalent cations from divalent cations and anions but remains challenging due to the complexity

this study reveals the mineralogical complexity of efflorescences in heap-leaching residues dump of the copper mining industry, focusing on their relationship with saline acid drainages, particularly during rainfall events that cause rapid dissolution of the efflorescences. using raman spectroscopy and sem-eds techniques, various secondary minerals of hydrated sulphate and chloride (cu, mg, na, fe

with the continuous growth of vanadium market demand, it has become increasingly urgent to promote research on sustainable and efficient vanadium resource utilization. stone coal vanadium ore has remained underutilized due to its low grade and complex composition. this study proposes a calcium oxide (cao)-assisted fusion and carbothermal reduction process for the efficient release and enrichment of

the relative roles of magmatic versus hydrothermal processes in nb-ta-li mineralization within highly evolved granites remain debated. the hailuoling pluton comprises a magmatic-hydrothermal sequence from monzogranite (139.1 ± 1.2 ma) through albite granite (137.0 ± 1.3 ma) and pegmatite to greisen (137.0 ± 1.6 ma), as dated by u-pb geochronology on cassiterite/columbite. during the magmatic stage

geothermal energy in granite is becoming a significant renewable type, yet the hydrofracturing mechanisms within the coarse grains of granite remain largely unexplored. the triaxial hydraulic fracturing of granites with coarse grains has been simulated in laboratory settings to explore the influence of grain size on fracturing behaviour. two types of granites with similar elastic properties but distinct

silicate-based composite materials have great potential as adsorbents in the field of mycotoxin removal. in this study, a porous graphitic carbon coated attapulgite (apt/c-zncl2) composite material was successfully prepared using an in-situ thermal reduction method with glucose as the carbon source. this composite material exhibited excellent adsorption performance towards aflatoxin b1, zearalenone

the bayan obo mine in china has abundant reserves of rare earth, niobium, titanium, iron, and other metal elements. however, due to its low-grade, fine-grained, and heterogeneous mineral characteristics, substantial rare metals are lost in tailings during mineral processing. to achieve efficient separation and enrichment of critical metal from the bayan obo tailings, this study applied the silicothermic

to increase the utilisation and added value of low-whiteness barite, this study developed-for the first time-a whiteness enhancement method based on an alkali additive (na2b4o7·5h2o-na2co3) and optimised the roasting process for removing impurities via single-factor experiments and response surface methodology. various characterisation techniques, such as x-ray diffraction, raman spectroscopy, x-ray

the tensile strength of rocks under real-time high-temperatures is essential for enhanced geothermal system development. however, the complex occurrence and deep burial of hot dry rocks limit the quantity and quality of standard samples for mechanical testing. this paper compared the tensile strengths obtained from brazilian splitting tests on standard samples (with a diameter of 50 mm and a thickness

accurately predicting the path-dependent plastic behavior of geomaterials is a challenging endeavor because of the intricate evolution of microstructures. in this study, a novel learnable physics engine is proposed to infer the elastoplastic constitutive model based on graph networks. this objective is accomplished by training a neural network model that incorporates interpretable components, for instance

ammonium salt precipitation remains the predominant method for vanadium recovery in industrial applications. however, it requires the consumption of large amounts of ammonium salts and produces harmful ammonia–nitrogen wastewater. in order to reduce ammonium salt consumption and minimize ammonia–nitrogen wastewater generation, a more sustainable v2o5 preparation technique was proposed. vanadium was