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Articles 181 - 210 of 317
Full-Text Articles in Mining Engineering
Process Mineralogy Of Iranian High Sulfur Iron Ore, Tonglin Zhao, Xiaoli Wang, Hongle Ai, Ahmed Sobhy
Process Mineralogy Of Iranian High Sulfur Iron Ore, Tonglin Zhao, Xiaoli Wang, Hongle Ai, Ahmed Sobhy
Mining Engineering Faculty Research & Creative Works
Processing of Iranian high sulfur iron ore is problematic in minerals industry. The iron ores were studied by the means of polarizing microscopy, chemical analysis, X-ray diffraction. The study shows that the iron ores have high grade of iron, and complex structures. XRD showed that the iron ore consists of metallic minerals such as magnetite with a small amount of hematite and limonite and non-metallic minerals as serpentine, chlorite, and talc. The average particle size of magnetite crystals is 0.182 mm. The ore contains 1.62% sulfur as harmful impurity in form of pyrite mineral. Due to the isomorphism of magnesium …
Holmium And Samarium Detectability In Post-Blast Residue, James Seman, Catherine E. Johnson, Carlos Henry Castano Giraldo
Holmium And Samarium Detectability In Post-Blast Residue, James Seman, Catherine E. Johnson, Carlos Henry Castano Giraldo
Mining Engineering Faculty Research & Creative Works
The creation of an identification taggant that survives detonation and can easily be recovered would prove invaluable in situations such as a terrorist attack where the explosives have been detonated and need to be traced by law enforcement. This paper shows that traces of two elements, samarium (Sm) and holmium (Ho), can be identified from explosive post-blast residue. This is the first step to creating a viable taggant system that survives detonation. The two elements were introduced to the explosive before detonation, and the post-blast residue was analyzed by neutron activation analysis (NAA). These data indicate the presence of these …
Detonation Synthesis Of Alpha-Variant Silicon Carbide, Martin Langenderfer, Catherine E. Johnson, William Fahrenholtz, Vadym Mochalin
Detonation Synthesis Of Alpha-Variant Silicon Carbide, Martin Langenderfer, Catherine E. Johnson, William Fahrenholtz, Vadym Mochalin
Mining Engineering Faculty Research & Creative Works
A recent research study has been undertaken to develop facilities for conducting detonation synthesis of nanomaterials. This process involves a familiar technique that has been utilized for the industrial synthesis of nanodiamonds. Developments through this study have allowed for experimentation with the concept of modifying explosive compositions to induce synthesis of new nanomaterials. Initial experimentation has been conducted with the end goal being synthesis of alpha variant silicon carbide (α-SiC) in the nano-scale. The α-SiC that can be produced through detonation synthesis methods is critical to the ceramics industry because of a number of unique properties of the material. Conventional …
Enhancing Manual P-Phase Arrival Detection And Automatic Onset Time Picking In A Noisy Microseismic Data In Underground Mines, Charles Mborah, Maochen Ge
Enhancing Manual P-Phase Arrival Detection And Automatic Onset Time Picking In A Noisy Microseismic Data In Underground Mines, Charles Mborah, Maochen Ge
Mining Engineering Faculty Research & Creative Works
Accurate detection and picking of the P-phase onset time in noisy micro seismic data from underground mines remains a big challenge. Reliable P-phase onset time picking is necessary for accurate source location needed for planning and rescue operations in the event of failures. In this paper, a new technique based on the discrete stationary wavelet transform (DSWT) and higher order statistics is proposed for processing noisy data from underground mines. The objectives of this method are to (i) improve manual detection and picking of P-phase onset; and (ii) provide an automatic means of detecting and picking P-phase onset time accurately. …
The Status Of The Local Community In Mining Sustainable Development Beyond The Triple Bottom Line, Sisi Que, Liang Wang, Kwame Awuah-Offei, Yao Chen, Wei Yang
The Status Of The Local Community In Mining Sustainable Development Beyond The Triple Bottom Line, Sisi Que, Liang Wang, Kwame Awuah-Offei, Yao Chen, Wei Yang
Mining Engineering Faculty Research & Creative Works
Mineral products provide essential fuels and raw materials for industrialization and our daily life, but their influences on other aspects of life need to be taken into consideration. While the whole world benefits from mining's contributions, most of the resulting detrimental impacts on the environment and society fall on the local communities. The participation of the local community is one solution to decrease the risks from community-related problems. Subsequently, the requirements of mining sustainable development can be met. A literature review was conducted on mining sustainability and stakeholder participation, and the shortcomings of existing research and difficulties of further study …
Multi-Auv Cooperative Target Hunting Based On Improved Potential Field In A Surface-Water Environment, Hengqing Ge, Guibin Chen, Guang Xu
Multi-Auv Cooperative Target Hunting Based On Improved Potential Field In A Surface-Water Environment, Hengqing Ge, Guibin Chen, Guang Xu
Mining Engineering Faculty Research & Creative Works
In this paper, target hunting aims to detect target and surround the detected target in a surface-water using Multiple Autonomous Underwater Vehicles (multi-AUV) in a given area. The main challenge in multi-AUV target hunting is the design of AUV's motion path and coordination mechanism. To conduct the cooperative target hunting by multi-AUV in a surface-water environment, an integrated algorithm based on improved potential field (IPF) is proposed. First, a potential field function is established according to the information of the surface-water environment. Then, the dispersion degree, the homodromous degree, and district-difference degree are introduced to increase the cooperation of the …
Study On The Effect Of Iron-Based Deoxidizing Inhibitors For Coal Spontaneous Combustion Prevention, Chaoyu Hao, Yanling Chen, Jiren Wang, Cunbao Deng, Guang Xu, Fengwei Dai, Rui Si, Hongfei Wang, Haoyu Wang
Study On The Effect Of Iron-Based Deoxidizing Inhibitors For Coal Spontaneous Combustion Prevention, Chaoyu Hao, Yanling Chen, Jiren Wang, Cunbao Deng, Guang Xu, Fengwei Dai, Rui Si, Hongfei Wang, Haoyu Wang
Mining Engineering Faculty Research & Creative Works
To improve the prevention of spontaneous coal combustion, reduced iron powder and other ingredients should be added together to form an iron-based deoxidizing inhibitor, with the dual effect of oxygen consumption and inhibition. The oxygen consumption rate of the inhibitor was studied through experiments. According to the theory of coordination resistance, the coordination resistance of Fe3+ was studied via the density functional method. Subsequently, a comparative experiment of the effects on spontaneous coal combustion was conducted. The research shows that several kinds of common resistance agents that are added to the reduced iron powder can consume oxygen. However, the …
Review Of The Methods For Determination Of Reactive Oxygen Species And Suggestion For Their Application In Advanced Oxidation Induced By Dielectric Barrier Discharges, Emile S. Massima Mouele, Olanrewaju Ojo Fatoba, Omotola Babajide, Kassim O. Badmus, Leslie F. Petrik
Review Of The Methods For Determination Of Reactive Oxygen Species And Suggestion For Their Application In Advanced Oxidation Induced By Dielectric Barrier Discharges, Emile S. Massima Mouele, Olanrewaju Ojo Fatoba, Omotola Babajide, Kassim O. Badmus, Leslie F. Petrik
Mining Engineering Faculty Research & Creative Works
Advanced oxidation processes (AOPs) particularly non-thermal plasmas based on electrical discharges have been widely investigated for water and wastewater treatment. Dielectric barrier discharges (DBDs) generate large amounts of selective and non-selective reactive oxygen species (ROS) such as ozone, hydrogen peroxide, atomic oxygen, superoxide molecular anions and hydroxyl radicals, having been proved to be efficient for water decontamination among various forms of electrical discharge systems. The detection and quantification methods of these oxygen species in non-thermal plasmas have been reviewed. However, their application in dielectric barrier discharge has not been well studied. It is therefore imperative to summarize the various detection …
Complete Stress-Induced Depolarization Of Relaxor Ferroelectric Crystals Without Transition Through A Non-Polar Phase, Sergey I. Shkuratov, Jason Baird, Vladimir G. Antipov, Wesley Hackenberger, Jun Luo, Shujun Zhang, Christopher S. Lynch, Jay B. Chase, Hwan R. Jo, Christopher C. Roberts
Complete Stress-Induced Depolarization Of Relaxor Ferroelectric Crystals Without Transition Through A Non-Polar Phase, Sergey I. Shkuratov, Jason Baird, Vladimir G. Antipov, Wesley Hackenberger, Jun Luo, Shujun Zhang, Christopher S. Lynch, Jay B. Chase, Hwan R. Jo, Christopher C. Roberts
Mining Engineering Faculty Research & Creative Works
The development of relaxer ferroelectric single crystal technology is driven by the ability to tailor ferroelectric properties through domain engineering not achievable in polycrystalline materials. In this study, three types of domain-engineered rhombohedral Pb (In1/2Nb1/2) O3-Pb (Mg1/3Nb2/3) O3-PbTiO3 crystals were subjected to transverse high strain rate loading. The experimental results indicate that the domain configuration has a significant effect on the stress-induced depolarization and the associated charge released. A complete depolarization of the single-domain crystals with 3m symmetry is observed, while multidomain crystals with 4mm and mm2 …
Focus Energy Determination Of Mining Microseisms Using Residual Seismic Wave Attenuation In Deep Coal Mining, Mingwei Zhang, Shengdong Liu, Shuzhao Chen, Yanlong Chen, Guang Xu, Deyu Qian
Focus Energy Determination Of Mining Microseisms Using Residual Seismic Wave Attenuation In Deep Coal Mining, Mingwei Zhang, Shengdong Liu, Shuzhao Chen, Yanlong Chen, Guang Xu, Deyu Qian
Mining Engineering Faculty Research & Creative Works
Based on the energy attenuation characteristics of residual wave in deep rock, a method was developed to determine the microseismic focus energy. Differential energy loss in infinitesimal spreading distance is logically deduced, upon which energy attenuation equation was established. With a logarithmic transformation, a linear relation of the residual seismic energy with distance is formulated. Its intercept was used to determine the microseismic focus energy. The result is compared with that determined by the energy density method. The reliability of the determined focus energy and the impact of the built-in velocity threshold on the residual wave energy computation are discussed. …
Calibration Of Mine Ventilation Network Models Using The Non-Linear Optimization Algorithm, Guang Xu, Jinxin Huang, Baisheng Nie, Duncan Chalmers, Zhuoming Yang
Calibration Of Mine Ventilation Network Models Using The Non-Linear Optimization Algorithm, Guang Xu, Jinxin Huang, Baisheng Nie, Duncan Chalmers, Zhuoming Yang
Mining Engineering Faculty Research & Creative Works
Effective ventilation planning is vital to underground mining. To ensure stable operation of the ventilation system and to avoid airflow disorder, mine ventilation network (MVN) models have been widely used in simulating and optimizing the mine ventilation system. However, one of the challenges for MVN model simulation is that the simulated airflow distribution results do not match the measured data. To solve this problem, a simple and effective calibration method is proposed based on the non-linear optimization algorithm. The calibrated model not only makes simulated airflow distribution results in accordance with the on-site measured data, but also controls the errors …
Impact Of Nanobubbles On Mechanical Coal Flotation Process, Ahmed Sobhy, Dongping Tao
Impact Of Nanobubbles On Mechanical Coal Flotation Process, Ahmed Sobhy, Dongping Tao
Mining Engineering Faculty Research & Creative Works
A bank of three 10-liter mechanical flotation cells integrated with nanobubble technology was investigated to assess the impact of nanobubbles on coal separation performance at different operating variables. The most significant operation parameters such as fuel oil collector dosage, methyl isobutyl carbinol (MIBC) frother concentration, flow rate to nanobubble generator, feed solid concentration, and feed flow rate were studied individually. Nanobubbles are generated selectively on the hydrophobic particles, which should have a positive effect on flotation separation efficiency. It has been shown that frother concentration, collector dosage, and flow rate to nanobubble generator had a positive and significant effect on …
Assessment Of The Physical And Chemical Qualities Of Brine And The Application Of Nano Zerovalent Iron For The Treatment Of Brine Effluent, M. J. Alegbe, O. S. Ayanda, P. Ndungu, O. O. Fatoba, A. Nechaev, L. F. Petrik
Assessment Of The Physical And Chemical Qualities Of Brine And The Application Of Nano Zerovalent Iron For The Treatment Of Brine Effluent, M. J. Alegbe, O. S. Ayanda, P. Ndungu, O. O. Fatoba, A. Nechaev, L. F. Petrik
Mining Engineering Faculty Research & Creative Works
The arbitrary discharge of brine effluent from reverse osmosis treatment plants impacts negatively to the environment due to its high salinity. In the present study, brine effluent obtained from eMalahleni treatment plant, South Africa, was analyzed by pH, electrical conductivity and total dissolved solids measurements. The ion chromatography and the inductively coupled plasma optical emission spectroscopy were also used to examine the anion and cation content of the brine effluent. The analysis of major cations and anions indicated that the brine water quality was above the target water quality range for potable water. Geochemical modelling of the brine effluent classified …
Exploring The Use Of A Time-Frequency Domain Technique For The Filtering Of Acoustic Emission/Microseismic Data, Charles Mborah, Maochen Ge, Zhigang Wang
Exploring The Use Of A Time-Frequency Domain Technique For The Filtering Of Acoustic Emission/Microseismic Data, Charles Mborah, Maochen Ge, Zhigang Wang
Mining Engineering Faculty Research & Creative Works
The performance of acoustic emission/micro seismic (AE/MS) monitoring systems in mines is greatly impacted by background noise interference. Mine trucks/vehicles, fans, blasting and electrical spikes generate noise which negatively affect AE/MS signal quality. Using such datasets without filtering may lead to inaccurate determination of first arrivals and hence wrong source location. Also, data contaminated with noise makes manual identification and picking of the first arrivals impossible or difficult to achieve. This paper explored the use of stationary discrete wavelet transform as a filter to augment noise reduction on mine AE/MS data. The output of a test run on both noisy …
Effect Of Explosive Charge Geometry On Shockwave Propagation, Catherine E. Johnson, Phillip R. Mulligan, Kelly Williams, Martin Langenderfer, Jeffrey Heniff
Effect Of Explosive Charge Geometry On Shockwave Propagation, Catherine E. Johnson, Phillip R. Mulligan, Kelly Williams, Martin Langenderfer, Jeffrey Heniff
Mining Engineering Faculty Research & Creative Works
With advancements in the 3D printing of explosives, the understanding how the shape of an explosive charge influences the energy expansion and subsequently the focusing of energy is becoming increasingly more important. Theoretically, explosive charges could be printed to focus the energy on targets of interest or to synthesize nanomaterials. The first step to quantifying the energy expansion and shock wave convergences for a 3D printed charge is to examine simple geometries of traditional explosive charges (non-3D printed). Detonation of 15 PETN-based primasheet charges in the spherical, cubic, cylindrical, and tetrahedral configurations have been examined in this study. Qualitative data …
Crustal Thickness Beneath Libya And The Origin Of Partial Melt Beneath As Sawda Volcanic Province From Receiver Function Constraints, Awad A. Lemnifi, Abdelsalam Elshaafi, John Browning, Nassib Aouad, Saad K. El Ebaidi, Kelly K. Liu, Agust Gudmundsson
Crustal Thickness Beneath Libya And The Origin Of Partial Melt Beneath As Sawda Volcanic Province From Receiver Function Constraints, Awad A. Lemnifi, Abdelsalam Elshaafi, John Browning, Nassib Aouad, Saad K. El Ebaidi, Kelly K. Liu, Agust Gudmundsson
Mining Engineering Faculty Research & Creative Works
This study investigates crustal thickness and properties within the Libyan region. Results obtained from 15 seismic stations belonging to the Libyan Center for Remote Sensing and Space Science are reported, in addition to 3 seismic stations publically available, using receiver functions. The results show crustal thicknesses ranging from 24 km to 36 km (with uncertainties ranging between ±0.10 km and ±0.90 km). More specifically, crustal thickness ranges from 32 km to 36 km in the southern portion of the Libyan territory then becomes thinner, between 24 km and 30 km, in the coastal areas of Libya and thinnest, between 24 …
Electrospinning: Polymer Nanofibre Adsorbent Applications For Metal Ion Removal, O. K. Pereao, C. Bode-Aluko, G. Ndayambaje, O. Fatoba, L. F. Petrik
Electrospinning: Polymer Nanofibre Adsorbent Applications For Metal Ion Removal, O. K. Pereao, C. Bode-Aluko, G. Ndayambaje, O. Fatoba, L. F. Petrik
Mining Engineering Faculty Research & Creative Works
In recent decades, electro spun nanofibers have been applied to different potential fields such as sensor devices, tissue engineering scaffolds, wound dressing, filtration, drug delivery, etc. and significant review papers have been published in these fields. However, the use of electro spun nanofibers in metal ion adsorption is emerging and comparatively innovative. Nanofiber materials hold great potential in advancing the growth of metallurgical technologies and progress for the separation of metallic ions from various sources. The Physico-chemical removal processes of adsorption use nanofibers due to their large surface area to volume ratio and the availability of a wide variety of …
Time Effect Of Water Injection On The Mechanical Properties Of Coal And Its Application In Rockburst Prevention In Mining, Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, Jifa Qian, Dong Zhu, Mingyao Wei
Time Effect Of Water Injection On The Mechanical Properties Of Coal And Its Application In Rockburst Prevention In Mining, Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, Jifa Qian, Dong Zhu, Mingyao Wei
Mining Engineering Faculty Research & Creative Works
Coal seam water injection is widely used to prevent rockbursts in coal mines, and the duration of water injection is an important parameter related to the effectiveness of rockburst prevention, making it of practical importance to optimize the effective water injection duration. This paper presents the test results of the mechanical properties and pore structure of samples with different soaking time, obtained from a working face where rockburst occurred. Soaking time changes the mechanical properties of samples, and this time effect differs with the coal size (from centimeter to nanometer size). Results of numerical simulation and on-site tests in the …
Degradation Of Bisphenol-A By Dielectric Barrier Discharge System: Influence Of Polyethylene Glycol Stabilized Nano Zero Valent Iron Particles, Jimoh O. Tijani, Massima E.S. Mouele, Ojo O. Fatoba, Omotola O. Babajide, Leslie F. Petrik
Degradation Of Bisphenol-A By Dielectric Barrier Discharge System: Influence Of Polyethylene Glycol Stabilized Nano Zero Valent Iron Particles, Jimoh O. Tijani, Massima E.S. Mouele, Ojo O. Fatoba, Omotola O. Babajide, Leslie F. Petrik
Mining Engineering Faculty Research & Creative Works
In this study we report the synthesis and catalytic properties of polyethylene glycol stabilized nano zero valent iron particles (PEG-nZVI) added to the dielectric barrier discharge (DBD) system to induce photo-Fenton process in the degradation of bisphenol A (BPA) in aqueous solution. The influence of operating parameters such as solution pH, initial concentration of the modelled pollutant and PEG-nZVI dosage on the extent of BPA degradation was investigated. The residual concentration of BPA and its intermediates were determined using high performance liquid chromatography (HPLC) and liquid chromatography mass spectrometry (LCMS). The high-resolution scanning electron microscope (HRSEM), x-ray diffraction (XRD), Brunauer-Emmett-Teller …
Effects Of Loading Rate On Gas Seepage And Temperature In Coal And Its Potential For Coal-Gas Disaster Early-Warning, Chong Zhang, Xiaofei Liu, Guang Xu, Xiaoran Wang
Effects Of Loading Rate On Gas Seepage And Temperature In Coal And Its Potential For Coal-Gas Disaster Early-Warning, Chong Zhang, Xiaofei Liu, Guang Xu, Xiaoran Wang
Mining Engineering Faculty Research & Creative Works
The seepage velocity and temperature externally manifest the changing structure, gas desorption and energy release that occurs in coal containing gas failure under loading. By using the system of coal containing gas failure under loading, this paper studies the law of seepage velocity and temperature under different loading rates and at 1.0 MPa confining pressure and 0.5 MPa gas pressure, and combined the on-site results of gas pressure and temperature. The results show that the stress directly affects the seepage velocity and temperature of coal containing gas, and the pressure and content of gas have the most sensitivity to mining …
Impact Of Coalbed Incidence Angle On Methane Enrichment Zone In Longwall Gob, Shengyong Hu, Ao Zhang, Guorui Feng, Shuwen Guan, Xiangqian Guo, Chao Li, Guang Xu
Impact Of Coalbed Incidence Angle On Methane Enrichment Zone In Longwall Gob, Shengyong Hu, Ao Zhang, Guorui Feng, Shuwen Guan, Xiangqian Guo, Chao Li, Guang Xu
Mining Engineering Faculty Research & Creative Works
To control methane emissions in gob into longwall working faces, it is necessary to understand the distributions of methane enrichment zones (MEZ) around mined coal seams with different incidence angles. In this paper, FLAC3D software is used to calculate the three-dimensional stress distributions in MEZ in gobs with coalbed incidence angles ranging from 0° to 50°. The results show that MEZ consistently exhibit a "hexagon" shape, and rotate in a clockwise direction as the coalbed angle increases. The MEZ range above the mined seam is larger than that below the mined seam. As the coalbed angle increases, the MEZ …
Dpm Dispersion Inside A Single Straight Entry Using Dynamic Mesh Model, Yi Zheng, Ying Li, Magesh Thiruvengadam, Hai Lan, Jerry C. Tien
Dpm Dispersion Inside A Single Straight Entry Using Dynamic Mesh Model, Yi Zheng, Ying Li, Magesh Thiruvengadam, Hai Lan, Jerry C. Tien
Mining Engineering Faculty Research & Creative Works
Three-dimensional simulations of diesel particulate matter (DPM) distribution inside a single straight entry for the Load-Haul-Dump loader (LHD)-truck loading and truck hauling operations were conducted by using ANSYS FLUENT computational fluid dynamics software. The loading operation was performed for a fixed period of 3 min. The dynamic mesh technique in FLUENT was used to study the impact of truck motion on DPM distribution. The resultant DPM distributions are presented for the cases when the truck was driving upstream and downstream of the loading face. Interesting phenomena were revealed in the study including the piston effect, layering of DPM in the …
Degradation Of 2-Nitrophenol By Dielectric Barrier Discharge System: The Influence Of Carbon Doped Tio2 Photocatalyst Supported On Stainless Steel Mesh, J. O. Tijani, M. E.S. Mouele, T. C. Tottito, O. O. Fatoba, L. F. Petrik
Degradation Of 2-Nitrophenol By Dielectric Barrier Discharge System: The Influence Of Carbon Doped Tio2 Photocatalyst Supported On Stainless Steel Mesh, J. O. Tijani, M. E.S. Mouele, T. C. Tottito, O. O. Fatoba, L. F. Petrik
Mining Engineering Faculty Research & Creative Works
This study investigated the degradation of 2-nitrophenol (2-NP) in aqueous solution by dielectric barrier discharge (DBD) system alone and its combination with supported TiO2 photocatalysts. The TiO2 photocatalyst supported on a stainless-steel mesh was synthesized using sol–gel solution of 8% polyacrylonitrile (PAN)/dimethylformamide/TiCl4 followed by pyrolysis in the furnace under N2 atmosphere at temperatures of 300, 350, or 400 °C for 3 h holding time. The supported catalysts were characterized for their morphologies, functional groups, crystallinity, surface areas and elemental chemical states by high resolution scanning electron microscope (HRSEM), Fourier transform infrared, X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area, …
Recovery Of Phosphate Minerals From Plant Tailings Using Direct Froth Flotation, Ashraf Alsafasfeh, Lana Z. Alagha
Recovery Of Phosphate Minerals From Plant Tailings Using Direct Froth Flotation, Ashraf Alsafasfeh, Lana Z. Alagha
Mining Engineering Faculty Research & Creative Works
Wastes produced from the phosphate industry presents many challenges due to the high economic and environmental impacts involved with their disposal. However, the relative scarcity of high-grade phosphate ores has driven researchers to recover and recycle these valuable wastes (secondary sources). The goal of this study was to investigate the possibility of upgrading the P2O5 content in tailings produced from a phosphorous production plant using direct froth flotation. Characterization assays, including X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence (XRF), and mineral liberation analysis (MLA), were first conducted to identify the mineralogical and morphological characteristics of …
Synthesis, Characterization And Photocatalytic Activity Of Ag Metallic Particles Deposited Carbon-Doped Tio2 Nanocomposites Supported On Stainless Steel Mesh, J. O. Tijani, T. C. Totito, O. O. Fatoba, O. O. Babajide, L. F. Petrik
Synthesis, Characterization And Photocatalytic Activity Of Ag Metallic Particles Deposited Carbon-Doped Tio2 Nanocomposites Supported On Stainless Steel Mesh, J. O. Tijani, T. C. Totito, O. O. Fatoba, O. O. Babajide, L. F. Petrik
Mining Engineering Faculty Research & Creative Works
Abstract: In this present work, post deposition of metallic Ag nanoparticles on carbon-doped TiO2 nanocomposites supported on stainless steel mesh was achieved via a combination of sol–gel and thermal evaporation techniques. Poly acrylonitrile dissolved in dimethyl formamide, and titanium tetra chloride was used as a carbon and titanium precursor, respectively. The photocatalytic activity of the prepared supported catalysts was evaluated by the degradation of an aqueous solution of methylene blue as a model pollutant under ultra-violet light irradiation. The prepared photocatalysts were characterized by several analytical techniques such as high resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, Brunauer–Emmett–Teller …
Flotation Behavior Of Complex Sulfide Ores In The Presence Of Biodegradable Polymeric Depressants, Muhammad Badar Hayat, Lana Z. Alagha, Syed Mohammad Sannan
Flotation Behavior Of Complex Sulfide Ores In The Presence Of Biodegradable Polymeric Depressants, Muhammad Badar Hayat, Lana Z. Alagha, Syed Mohammad Sannan
Mining Engineering Faculty Research & Creative Works
In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS2) from sphalerite (ZnS) and pyrite (FeS2) using sodium isopropyl xanthate as a collector and 4-methyl-2-pentanol (MIBC) as a frother. Flotation tests were carried out in a D12-Denver flotation laboratory cell in the presence and absence of chitosan and/or sodium cyanide depressant which is commercially used as pyrite depressant in sulfide mineral flotation process. Flotation recoveries and concentrate grades (assay) were studied as a function of polymer concentration and flotation time. It …
Responsiveness Of Mining Community Acceptance Model To Key Parameter Changes, Mark Kofi Boateng, Kwame Awuah-Offei
Responsiveness Of Mining Community Acceptance Model To Key Parameter Changes, Mark Kofi Boateng, Kwame Awuah-Offei
Mining Engineering Faculty Research & Creative Works
The mining industry has difficulties predicting changes in the level of community acceptance of its projects over time. These changes are due to changes in the society and individual perceptions around these mines as a result of the mines' environmental and social impacts. Agent-based modeling can be used to facilitate better understanding of how community acceptance changes with changing mine environmental impacts. This work investigates the sensitivity of an agent-based model (ABM) for predicting changes in community acceptance of a mining project due to information diffusion to key input parameters. Specifically, this study investigates the responsiveness of the ABM to …
Surface-Modified Polyacrylonitrile Nanofibres As Supports, Chris Ademola Bode-Aluko, Omoniyi Pereao, Olanrewaju Fatoba, Leslie Petrik
Surface-Modified Polyacrylonitrile Nanofibres As Supports, Chris Ademola Bode-Aluko, Omoniyi Pereao, Olanrewaju Fatoba, Leslie Petrik
Mining Engineering Faculty Research & Creative Works
Polyacrylonitrile nanofibers (PAN-nfs) are one of the most studied nanofibers because of their excellent characteristics, such as good mechanical strength, chemical resistance, and good thermal stability. Due to the easy dissolution in polar organic solvents, PAN-nfs are mostly produced via electrospinning technique. The electro spun PAN-nfs surfaces are relatively in-active and hydrophobic, and, therefore, hinder some potential applications; however, chemical surface modification reactions, such as amination, reduction, hydrolysis, and amidoximation, have been carried out on them. These reactions bring about functional groups, such as amine, hydroxyl, carboxylic, imine etc., to the surface PAN-nfs and invariably make their surfaces active and …
Effect Of Single Dead End Entry Inclination On Dpm Plume Dispersion, Yi Zheng, Hai Lan, Magesh Thiruvengadam, Jerry C. Tien, Ying Li
Effect Of Single Dead End Entry Inclination On Dpm Plume Dispersion, Yi Zheng, Hai Lan, Magesh Thiruvengadam, Jerry C. Tien, Ying Li
Mining Engineering Faculty Research & Creative Works
Diesel particulate matter (DPM) is a by-product from operating diesel engines. Since diesel powers are one of the major sources of energy for mobile underground mining equipment, the adverse health effects of DPM are of a great concern. This paper used computational fluid dynamics (CFD) method to study the effect of entry inclination on DPM plume distribution in a dead-end entry. An upward mining face and a downward mining face were built with a truck and a loader in loading operation close to the face area. A species transport model with incorporated buoyancy effect was used to examine the DPM …
Transformation Of South African Coal Fly Ash Into Zsm-5 Zeolite And Its Application As An Mto Catalyst, Roland Na M. Missengue, Pit Losch, Grant Sedres, Nicholas M. Musyoka, Ojo O. Fatoba, Benoit Louis, Patrick Pale, Leslie F. Petrik
Transformation Of South African Coal Fly Ash Into Zsm-5 Zeolite And Its Application As An Mto Catalyst, Roland Na M. Missengue, Pit Losch, Grant Sedres, Nicholas M. Musyoka, Ojo O. Fatoba, Benoit Louis, Patrick Pale, Leslie F. Petrik
Mining Engineering Faculty Research & Creative Works
This study presents a way of using South African coal fly ash by extracting metals such as Al and Fe with concentrated sulphuric acid, and then using the solid residue as a feedstock for the synthesis of ZSM-5 zeolite. The percentage of aluminum and iron oxides decreased from 28.0 ± 0.2% and 5.0 ± 0.1% in coal fly ash to 24.6 ± 0.1% and 1.6 ± 0.01% in the acid treated coal fly ash respectively. The fly ash-based zeolite ZSM-5 sample synthesized from the solid residue after extraction of Al and Fe, contained 62% of ZSM-5 zeolite pure phase with …