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  • SME
    Surface Free Energy Characterization Of Fine Particles

    By I. Yildirim

    Free energy of interaction between particles in water can be calculated if one knows the values of appropriate interfacial tensions, which in turn can be determined from the surface free energies of t

    Jan 1, 2002

  • SME
    Removal Of Dolomite From Phosphatic Ore

    By Mengxiong Guo, Xuxin Shao

    The recent depressant research is summarized, and a new kind of depressant (SCO) has been put forward in this article. Using Na-oleate as a collector and SCO as a depressant, separation of dolomite an

    Jan 1, 1989

  • SME
    Leaching Of Nickel And Cobalt From Acid Mine Drainage Sludge

    By S. P. Fleming

    An acid mine drainage sludge containing 0.26% nickel, 0.21 % cobalt and 4.5% manganese was leached in a one-liter reactor with sulfuric acid in the absence and presence of sodium sulfite. The effects

    Jan 1, 1992

  • SME
    Discriminating between different genetic types of marine ferro-manganese crusts and nodules based on rare earth elements and yttrium

    By Andrea Koschinsky, Akira Usui, Michael Bau, Katja Schmidt, James Hein, Thomas Kuhn

    Marine ferro-manganese (Fe-Mn) crusts and nodules are metal-rich chemical sediments that are archives of paleoceanographic proxies and potential metal resources and targets of deep-sea mining. Traditi

    Sep 1, 2014

  • SME
    Slurry Pump Design Features

    By George Wilson

    When pumping abrasive slurry mixtures, special attention must be given to pump design and construction. The second article in this two-part series describes some design features to consider when selec

    Jan 10, 1981

  • SME
    Managing Safety In The Mining Industry

    By F. Nelson

    RJB Mining is the largest coal producer in the UK. In January 1995 the Company acquired the Central North and Central South Regions of British Coal consisting of: ? 15 operating collieries -includin

    Jan 1, 1998

  • SME
    Canadian Companies Make Their Pitch At PDAC

    At the Prospectors and Developers Annual Convention (PDAC) in Toronto, Canada mining and exploration companies of all sizes were on hand to discuss the year that was and those that will be. The follow

    Jan 1, 2009

  • SME
    Opencast Mining Of Brown Coal In Eastern Europe (53316393-306c-401a-9c67-5ad911520cfd)

    By Yoginder P. Chugh

    Most mines are large producing 0-25 mmt annually. The coal is mine.) at depths ranging from .0-150 m 120-500 ft mining at 300 m .(,1000 ft) depth is anticipated in the future. Single and multiple seam

    Jan 1, 1980

  • SME
    Utilizing Mineralogy In Process Development For Hecla's Lakeshore Project ? Introduction

    By Theodore S. Jordan

    The discovery of a major porphyry-type copper deposit on the Papago Indian Reservation in Pinal County, Arizona was announced by El Paso Natural Gas Company in 1968. The deposit, known as the Lakeshor

    Jan 1, 1985

  • SME
    Utilization of Strain Measurements on Shielded Tunnel Boring Machines

    By Brad Murray

    Evaluating the performance of a shielded tunnel boring machine (TBM) can be difficult because the ground cannot be observed directly and in relation to the TBM attitude within the excavation. It is di

    Jan 1, 2008

  • SME
    Low-Rank Coal Ash Characterization- Washability And Utilization Implications – Preprint 97-132

    By P. D. Rao, D. E. Walsh

    Chemical and physical properties of typical low-rank coal (LRC) ash are significantly different than bituminous coal ash. With the exception of extraneous ash, which is incorporated during mining or i

    Feb 24, 1997

  • SME
    TGA Kinetic Analyses of Zinc Ferrite Reduction with H2 (Mining, Metallurgy & Exploration)

    By VIVEK KASHYAP, Evody Tshijik Karumb, PATRICK TAYLOR

    The partial reduction of zinc ferrite to zinc oxide and iron (II, III) oxide can enhance the leaching rate of zinc. Zinc ferrite has often been found as a major component of zinc residues and electric

    Jul 26, 2022

  • SME
    Investigation of the Rockburst Mechanism of Driving Roadways in Close-Distance Coal Seam Mining Using Numerical - Mining, Metallurgy & Exploration (2021) Modeling Method

    By Stanisław Prusek, CHONG WEI, Huawei Xu, Jun Wang, Andrzej Walentek, Artur Dyczko, Derek B. Apel

    The excavation-induced stresses transferred from the panels or pillars in upper coal seams play a key role in the occurrence of rockbursts in driving roadways during close-distance coal seam mining, w

    Aug 26, 2021

  • SME
    Mine Equipment Maintenance And Inventory Control ? Introduction

    By John Jonkman

    The cost of equipment maintenance is the largest single expense at many mines and processing plants. It is not unusual for a maintenance and repair budget to be larger than 50% of the punt's tota

    Jan 1, 1986

  • SME
    Industry's Best Technology Showcased at 2014 - SME Annual Meeting 2022

    By Georgene Renner

    With more than 800 booth spaces sold and 540 exhibiting companies displaying their wares, there was something for everyone on the exhibit floor of the 2014 SME Annual Meeting in Salt Lake City, UT Feb

  • SME
    New Miner Training for the 21st Century

    By Daniel H. McClain

    A unique partnership between the Colorado Mine Safety and Training Program (CMSTP), the Colorado Rock Products Association (CRPA) and the Higher Education and Advanced Technology (HEAT)Center resulted

    Jan 1, 2003

  • SME
    Closing the Historic Alaska-Juneau Mine

    By Joseph L. Petrillo

    In July 1997, Kvaerner Environmental signed a unique contract with Echo Bay Alaska called the Transfer Risk and Accelerate Closure (TRAC). The contract called for Kvaerner to assume the responsibilit

    Jan 1, 1999

  • SME
    Fuzzy Logic Self-Tuning PID Controller Design for Ball Mill Grinding Circuits Using an Improved Disturbance Observer Mining, Metallurgy and Exploration

    By Hamed Khodadadi, Hamid Ghadiri

    In this study, a fuzzy logic self-tuning PID controller based on an improved disturbance observer is designed for control of the ball mill grinding circuit. The ball mill grinding circuit has vast app

  • SME
    Fuzzy Logic Self-Tuning PID Controller Design for Ball Mill Grinding Circuits Using an Improved Disturbance Observer Mining, Metallurgy and Exploration (ad065287-325d-4c37-9f3a-f3531e4c1359)

    By Hamed Khodadadi, Hamid Ghadiri

    In this study, a fuzzy logic self-tuning PID controller based on an improved disturbance observer is designed for control of the ball mill grinding circuit. The ball mill grinding circuit has vast app

  • SME
    Ground Support Systems for Heavy, Squeezing Ground at Burgin Mine

    By Donald O. Rausch, William E. Hawkes, Odin Jr. Strandberg

    INTRODUCTION Kennecott Copper Corp.'s Tintic Div. Burgin mine is a 725 t/d (800 stpd) lead-zinc producer, located in the east Tintic mining district, 5.6 km (3.5 miles) east of Eureka, and 130

    Jan 1, 1982