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  • SME
    Advances In The Calmef Process For Treatment Of Concentrates

    By Donn A. Calder, Wayne C. Henderson

    The Calmet Process for extraction and recovery of gold and silver from concentrates and high:grade ores has been a commercial reality for over two years. During that time period, almost seventy-five d

    Jan 1, 1998

  • SME
    Optimizing A Gold-silver Plant Using Mineralogical Data

    By Wolfgang Baum

    The objective of this presentation is to demonstrate the utilization of process mineralogy to improve the plant performance of a large gold-silver operation. From raw ore to tailings, from concentrate

    Jan 1, 1998

  • SME
    Transfer Risk - Accelerate Closure (Trac™ ): A Fixed-price Contract Program For Site Remediation/case Closure

    By Kevin Bell

    The TRAC™ Program was developed to provide our clients with a mechanism that allows them to better manage site remedia­tion and closure costs. This program provides a fixed-price contract for site rem

    Jan 1, 1998

  • SME
    Options To Revegetate Neutralized Heap Leach Material

    By Leslie M. Burnside, Gene E. McClelland, Roy R. Cellan

    Revegetation of neutralized heap leach material in the arid environment of the Great Basin represents a challenge of avail­able technology. The chemical and physical environment of spent and neutraliz

    Jan 1, 1998

  • SME
    New Antiscaiant For Gold Circuits

    By Gary E. Geiger

    laboratory studies were performed to assess the calcium carbonate inhibition performance of phsophonates and polymeric dispersants at high hardness and high pH conditions. Based on the results of thes

    Jan 1, 1998

  • SME
    Strategies For Optimisation Of Gold Processing Plants (More Gold At No Additional Cost)

    By David Martin Menne, Chris Campbell-Hicks

    Optimisation of many oxide gold processing facilities, in most cases, either does not really take place or if it does take place it happens too late or takes too long. This is unf01tunate as extra pro

    Jan 1, 1998

  • SME
    Economic Considerations Of Comminution Circuits

    By Wendi H. Cooksey

    This paper examines two comminution circuits on a hypo­thetical gold ore deposit with both small-scale (1,000 short tons per day) and large-scale (35,000 short tons per day) production rates. The most

    Jan 1, 1998

  • SME
    The Use Of Brominated Hydantojns For Gold Leacidng

    By Rodney H. Sergent

    After being forgotten or ignored for nearly 100 years, the ability of bromine chemistry to extract gold from ore has been rediscovered. While bromine chemistry is similar to chlorine, there are some

    Jan 1, 1998

  • SME
    Removal And Stabilization Of Arsenic

    By M. Misra, J. Nanor

    The removal and stability of arsenic over a wide pH range (3.0-10.0) from synthetic solutions and industrial waste effluents (including mining waste tailing slurry) can be accomplished with addition o

    Jan 1, 1998

  • SME
    Metal Recovery Aids In Heap Leaching Appucations

    By James H. Nulty, Joseph S. Roti

    Wetting agents used for heap leach gold applications would appear to have technical merit in aiding in recovering higher levels of precious metal. Many questions, however, remain as to whether they wi

    Jan 1, 1998

  • SME
    Oal-gold Agglomeration -a Novelapproach To Gold Recovery

    By C. F. Bonney

    Spherical or oil agglomeration has been recognised for many years as a possible process for the recovery of mineraVmetal values. BP has investigated the potential of spherical agglomeration for a numb

    Jan 1, 1998

  • SME
    Heap Leaching In Desert And Equatorialcondidons

    By J. Libaude

    The Changement mine in French Guyana has, since 1983, processed gold ore by classical gravity methods. A large part of the gold is in the form of very small, free or enclosed grains. Recovery by gravi

    Jan 1, 1998

  • SME
    New Technology For The Prevention Of Acid Rock Drainage

    By Gary P. Marshall, Jeffery S. Thompson, Robert E. Jenkins

    The effectiveness of the new DuPont Passivation Technology in eliminating acid generation from iron sulfides is presented. Passivation is achieved by treatment with a dilute basic perman­ganate soluti

    Jan 1, 1998

  • SME
    Design And Operation Of A Microwave Pilot Plant For Calcining Refractory Gold Ores And Concentrates

    By P. Brooks, W. LaRochelle, J. M. Tranquilla

    EMR's recently commissioned Pilot Plant in Fredericton, N.B. Canada, the latest and largest in the company's sequence of prototype and demonstration systems, is being used as a process development fac

    Jan 1, 1998

  • SME
    The Itos Chloride Leach Plant For Silver - Two Years Into Production

    By Daniel W. Kappes

    In late 1995 at the Randol symposium in Squaw Valley, I gave a paper which described the Itos project flowsheet. At that time, project construction was nearly completed and stmtup was close. This pape

    Jan 1, 1998

  • SME
    Ilvipact Of Top Management Phil.dsophy On Heap Leach Design

    By R. Bruce Thorndycraft

    Heap leaching should not be chosen for development of a property solely on the basis of paper studies. Management should be made to understand where the risks are in heap leaching, and management shou

    Jan 1, 1998

  • AUSIMM
    Metallurgical Characterisation of George Fisher Ore Textures and Implications for Ore Processing

    By Vink L, Johnson N. W, Mackenzie J, Young M. F, Johnston M, Landmark V

    The influence of ore textures on metallurgical behaviour is poorly understood for most ores. An alternative method for characterising ore textures and for determining the resulting implications on o

    Jan 1, 1998

  • AUSIMM
    From Green Field Site to Block Cave Mine - Results of Northparke's Drill and Blast Design Process

    The green field site is one that has no history of mining and as such it presents the designer with a blank canvas, on which any number of drill and blasting options can be drafted. No matter which mi

    Jan 1, 1998

  • TMS
    Hw Process Technologies, Inc's Engineered Membrane Separation (EMS) ,Of Copper And Gold In Cyanide Solutions

    HW Process Technologies, Inc. (HWPT) has developed a patented membrane-based ion fractionation system, which specifically separates copper from gold and silver species in a cyanide matrix. This Engine

    Jan 1, 1998

  • SME
    BHP Copper's Lower K Hoist Conversion: Deeper, Faster, More Efficient

    By K Louie

    When BHP Copper's Lower Kalamazoo Project commenced production in January 1997, two of the four original hoists had been converted to hoist ore from the Lower K level. Conversions on these hoists

    Jan 1, 1998