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  • SME
    The Evolution of Grinding Mill Power Models

    By Nicolin Govender, Pramod Kumar, Raj Rajamani

    Mill power models have been used in a variety of ways in industrial practice since power directly equates to throughput and fineness of ground product. We first start with Hogg-Fuerstenau Power Model

  • SME
    The Four E's Of Productivity

    By W. D. Blackburn

    If there is a single key to managing a mineral extraction company, it is the control of productivity. American labor costs, in general, tend to be in the range of 10%-15% of total costs. American coal

    Jan 1, 1986

  • SME
    RETC 2009 Full Proceedings - RETC2009

    By Bill Mariucci, Gary Almeraris

    All Rights Reserved. Printed in the United States of America. Information contained in this work has been obtained by SME, Inc. from sources believed to be reliable. However, neither SME nor its autho

    Dec 1, 2009

  • SME
    Selective Process Route to Recover Magnetite from Chalcopyrite Dam Copper Flotation Tailings

    By José Maria Silva, Eugênio Oliveira, Ruberlan Silva, Thiago Souza, Lucas Reis, Lorena Guimarães, Matheus Bianchetti

    Copper mine operations consistently generate a large quantity of tailings after their concentration processing. These tailings are either piled up or stored in a dam, where both alternatives of dispos

    Sep 28, 2022

  • SME
    Discussion of dangers involved when transporting and storing unconsolidated materials

    By David A. Zegeer

    Since 1980, more than 40 miners have lost their lives by being trapped and suffocating in stock-piles, bins, silos, and similar facilities. Mine Safety and Health Administration (MSHA) is concerned ab

    Jan 1, 1987

  • SME
    Room-and-Pillar Method of Open- Stope Mining - Production Methods of Noncoal Room-and-Pillar Mining

    By Richard L. Bullock

    At the beginning of the previous chapter, variation in the types of room-and-pillar stopes were briefly identified so that the reader could begin to understand the extensive application of this mining

    Jan 1, 1982

  • SME
    Large Flotation Cells In The Gold Industry

    By Timo Niitti

    Within the minerals industry, flotation is the predominant method when processing sulphide ores. There is hardly any competition in this area because of the high efficiency and low costs of flotation.

    Jan 1, 1995

  • SME
    A Novel Use of Ion Flotation for Recovery of Gold from Extremely Dilute Solutions

    By Neville T. Moxen, Stuart K. Nicol, Malcolm D. Engel

    Ion flotation is a process in which ions of interest are complexed with a suitable surfactant molecule. A dilute solution containing these complexes is then aerated, under which circumstance the surfa

    Jan 1, 1990

  • SME
    An Alternative Hydrometallurgical Approach To The Treatment Of Gravity Concentrates

    By Gregory Owen Lewis

    The use of gravity concentration as a means of recovering the 'free' gold component from alluvial and milled ore products is widely used and is receiving increasing attention, particularly with the in

    Jan 1, 1998

  • SME
    The Effect Of PB(No3)2addition On The Processing Of Blended Fort Knox And True North Ores at The Fort Knox Mine

    By E. M. Hill, D. E. Walsh, J. T. Hollow, H. K. Lin

    Fairbanks Gold Mining, Inc. (FGMI) began blending and processing True North ore at their Fort Knox mill on April 12, 2001.Gold extraction subsequently dropped from 88% to 71% during the last week of A

    Jan 1, 2003

  • SME
    Precast Concrete Segment Lining For Buckskin Mountains Water Conveyance Tunnel

    By William R. Groseclose, Kenneth D. Schoeman

    The Buckskin Mountains Tunnel is a key link in the Bureau of Reclamation's Central Arizona Project. The 22-foot (6.7-m) diameter tunnel is being bored in a north-northwesterly direction through v

    Jan 1, 1976

  • SME
    Molybdenite flotation from copper/molybdenum concentrates by ozone conditioning

    By M. R. Yalamanchili, W. H. Jang, Y. Ye, J. D. Miller

    Typically, rougher molybdenite flotation and recovery from bulk copper/molybdenum concentrates involves the use of alkalisulfides, Nokes reagents, cyanides, oxidants, and/or thermal treatment to depre

    Jan 1, 1991

  • SME
    Variables in the Production of Premium Fuels and Ultra Clean Coal By Selective Agglomeration

    By D. V. Professor Keller

    The production of premium coal-based fuels (<3% ash) and ultra clean coals (<1% ash) using the process of selective agglomeration requires proper selection of raw coal, rough preparation procedures, m

    Jan 1, 1995

  • SME
    Horizontal stress and longwall headgate ground control (f04c9550-0a29-4e7e-9795-c59d77d72a59)

    By D. Dolinar, T. P. Mucho

    Horizontal stresses are caused by global platetectonic forces. During 1995 alone they were largely responsible for the closing of two longwall mines in the United States. This paper presents six case

    Jan 1, 1999

  • SME
    A Complete Definition And Computer Aided Examination Of The Payback Period Project Evaluation Criterion

    By [Miroslaw] M. Hajdasinski

    The Payback Period (PBP) is one of the most widely applied project evaluation criteria &apos;in the mineral industry. As much as this criterion is liked by practitioners, it is also criticized by acad

    Jan 1, 1989

  • SME
    Costs And Financial Evaluation Methods In Ventilation Engineering. ? Introduction

    By Michael J. Howes

    The nature of business in a free enterprise system is to maximise the return on an investment i.e. to maximise the wealth of the shareholders. This is normally achieved within constraints dictated by

    Jan 1, 1980

  • SME
    Analysis of the Surface Potential Developed by Non-Reactive Ionic Solids

    By J. V. Calara, J. D. Miller

    The sign of the surface potential for complex non-reactive ionic solids cannot be predicted solely from consideration of the hydration energy of gaseous ions which constitute the ionic lattice. Accura

    Jan 1, 1976

  • SME
    Application Of Three-Phase Foam In Extinguishing Spontaneous Combustion Of Coal

    In underground coal mining, one of the biggest challenges is spontaneous combustion, which will not only present safety hazards but result in reserve losses as a result of burnt coal. The released hea

    Jan 1, 2011

  • SME
    Us Geological Surveys Coal Resource Assessment Of Top-Producing Coal Beds And Coal Zones In The Northern And Central Appalachian Basin Coal Regions

    By L. F. Ruppert, P. A. Freeman, R. C. Milici, S. J. Tewalt, L. J. Bragg

    The U.S. Geological Survey has completed a dig-ital coal resource assessment of six of the top-producing coal beds and coal zones in the northern and central Appalachian Basin coal regions. These inc

    Jan 1, 2001

  • SME
    Concentration Of Barite Ores

    By Ted T. Biddle

    The world energy crisis has created a greatly expanded exploration program for energy fuels. The demand for materials required for drilling operations such as barite, which is the primary component of

    Jan 1, 1980