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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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