Browsing Scholarly Works, Mining and Minerals Engineering by Issue Date

Now showing items 1-20 of 64

    • Method for dewatering fine coal 

      Mining and Minerals Engineering; Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Luttrell, Gerald H. (United States Patent and Trademark Office, 1995-10-17)
      Fine coals are dewatered in an energy efficient process in which a non-polar liquid or a mixture of different hydrophobic liquids are used to displace the water from the coal surface. This process works with higher rank ...

    • Apparatus for improved ash and sulfur rejection 

      Mining and Minerals Engineering; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Luttrell, Gerald H. (United States Patent and Trademark Office, 1996-06-04)
      An apparatus for separating impurities from coal, includes a device for removing a predetermined amount of ash-forming substances from the coal and a device for removing a predetermined amount of high specific gravity ...

    • Inhibition of Copper Pitting Corrosion in Aggressive Potable Waters 

      Sarver, Emily A.; Edwards, Marc A. (Hindawi, 2012-08-21)
      Copper pitting corrosion can lead to premature plumbing failures, and can be caused by aggressive potable waters characterized by high pH, free chlorine residual and low alkalinity. In such waters and under continuous flow, ...

    • Reagents in coal processing: where do they go? 

      Morris, Josh; Sarver, Emily A.; Luttrell, Gerald H.; Novak, John T. (Canadian Institute Of Mining, Metallurgy And Petroleum, 2012-10)

    • Application of Double-Difference Seismic Tomography to Carbon Sequestration Monitoring at the Aneth Oil Field, Utah 

      Slaker, Brent; Westman, Erik C.; Luxbacher, Kramer Davis; Ripepi, Nino (MDPI, 2013-10-23)
      Double difference seismic tomography was performed using travel time data from a carbon sequestration site at the Aneth oil field in southeast Utah as part of a Department of Energy initiative on monitoring, verification, ...

    • Considerations for TGA of Respirable Coal Mine Dust Samples 

      Scaggs, Meredith; Sarver, Emily A.; Keles, Cigdem (2015)
      Respirable dust in coal mining environments has long been a concern for occupational health. Over the past several decades, much effort has been devoted to reducing dust exposures in these environments, and rates of coal ...

    • Preliminary Investigation of DPM Scavenging by Water Sprays 

      Rojas-Mendoza, L.; McCullough, E.; Sarver, Emily A.; Saylor, J. R. (2015)

    • DPM Monitoring in Underground Metal/Nonmetal Mines 

      McCullough, E.; Rojas-Mendoza, L.; Sarver, Emily A. (2015)

    • Considerations for an Automated SEM-EDX Routine for Characterizing Respirable Coal Mine Dust 

      Johann, Victoria Anne; Sarver, Emily A. (2015)
      Respirable dust in coal mining environments has long been a concern for occupational health. Over the past several decades, much effort has been devoted to reducing dust exposures in these environments, and rates of coal ...

    • Notes on the Potential for the Concentration of Rare Earth Elements and Yttrium in Coal Combustion Fly Ash 

      Hower, James; Groppo, John; Henke, Kevin; Hood, Madison; Eble, Cortland; Honaker, Rick; Zhang, Wencai; Qian, Dali (MDPI, 2015-06-23)
      Certain Central Appalachian coals, most notably the Fire Clay coal with a REY-enriched volcanic ash fall tonstein, are known to be enriched in rare earth elements. The Fire Clay tonstein has a greater contribution to the ...

    • A Standard Characterization Methodology for Respirable Coal Mine Dust Using SEM-EDX 

      Sellaro, Rachel; Sarver, Emily A.; Baxter, Daniel (MDPI, 2015-12-14)
      A key consideration for responsible development of mineral and energy resources is the well-being of workers. Respirable dust in mining environments represents a serious concern for occupational health. In particular, coal ...

    • Flotation machine rotor 

      Biomedical Engineering and Mechanics; Mining and Minerals Engineering; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Yang, Yihong; Luttrell, Gerald H.; Telionis, Demetri P.; Ragab, Saad; Said, Abdel-Halim; Miskovic, Sanja; Noble, Christopher Aaron (United States Patent and Trademark Office, 2016-02-23)
      A rotor for flotation machines or flotation cells of flotation machines includes blades that are configured to provide improved bubble flow and bubble generation performance while also reducing the power requirements for ...

    • High Pressure Oxydesulphurisation of Coal—Effect of Oxidizing Agent, Solvent, Shear and Agitator Configuration 

      Ghauri, Moinuddin; Shahzad, Khurram; Inayat, Abrar; Ali, Zulfiqar; Khan, Waqar Ali; Akhtar, Javaid; Cliffe, Keith R. (MDPI, 2016-06-30)
      The ambient temperature high pressure oxydesulphurisation technique was investigated to reduce the sulphur content. Prince of Wales coal was chosen for this study. The focus of the study was to investigate the reduction ...

    • Method of separating and de-watering fine particles 

      Mining and Minerals Engineering; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan (United States Patent and Trademark Office, 2016-12-13)
      A process for cleaning and dewatering hydrophobic particulate materials is presented. The process is performed in two steps: 1) agglomeration of the hydrophobic particles in a first hydrophobic liquid/aqueous mixture; ...

    • A Computer-Controlled SEM-EDX Routine for Characterizing Respirable Coal Mine Dust 

      Johann-Essex, Victoria; Keles, Cigdem; Sarver, Emily A. (MDPI, 2017-01-23)
      A recent resurgence in coal workers’ pneumoconiosis (or “black lung”) and concerns over other related respiratory illnesses have highlighted the need to elucidate characteristics of airborne particulates in occupational ...

    • The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite 

      Chen, Yanfei; Shi, Qing; Feng, Qiming; Lu, Yiping; Zhang, Wencai (MDPI, 2017-07-20)
      The influence of conditioning on the flotation of pyrrhotite in the presence of chlorite was investigated through flotation tests, sedimentation tests, and X-ray photoelectron spectroscopy (XPS) analysis. The flotation ...

    • Determining Coalbed Methane Production and Composition from Individual Stacked Coal Seams in a Multi-Zone Completed Gas Well 

      Ripepi, Nino; Louk, Kyle; Amante, Joseph; Schlosser, Charlies; Tang, Xu; Gilliland, Ellen (MDPI, 2017-10-02)
      This work proposes a novel and cost-effective approach to determine coalbed methane (CBM) production and composition from individual coal seams in a multi-zone completed CBM well. The novel method uses water to cover ...

    • Cleaning and dewatering fine coal 

      Mining and Minerals Engineering; Virginia Tech Intellectual Properties, Inc.; Yoon, Roe-Hoan; Eraydin, Mert K.; Freeland, Chad (United States Patent and Trademark Office, 2017-10-17)
      Fine coal is cleaned of its mineral matter impurities and dewatered by mixing the aqueous slurry containing both with a hydrophobic liquid, subjecting the mixture to a phase separation. The resulting hydrophobic liquid ...

    • Flotation separation of scheelite from calcite using mixed collectors 

      Yan, Weiping; Liu, Cheng; Ai, Guanghua; Feng, Qiming; Zhang, Wencai (Elsevier, 2017-12)
      Flotation separation of scheelite from calcite is difficult due to the similarities in their surface properties. In this work, the flotation behavior of scheelite and calcite using oxidized paraffin soap(OPS), benzohydroxamic ...

    • Review and simulation of passive seismic tomography in block cave mining 

      Ghaychi Afrouz, Setareh; Westman, Erik C. (Australian Centre for Geomechanics, Perth, 2018)
      Seismic tomography methods are progressing in crustal seismology and at the smaller mining scale to recognise highly stressed or fracture-prone areas. Velocity variations measured by seismic tomography represent stress ...