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The Immobilization Of Free Ionic Gold And Asparaglne-Complexed Ionic Gold By Sporosarcina Ureae: The Importance Of Organo-Gold Complexes In Gold Mobility
By G. Southam
Bacterial populations play an active role in mineral weathering in subsurface and near-surface environments e.g., supergene enrichment of Cu at Morenci, AZ. An in vitro bacterial biofilm model was use
Jan 1, 1999
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Immobilization of free ionic gold and L-asparagine-complexed ionic gold by Sporosarcina ureae: The importance of organo-gold complexes in gold mobility
By W. S. Fyfe, G. Southam, T. J. Beveridge
Sporosarcina ureae was able to grow in the presence of tip to 10-ppm L-asparagine complexed gold. However, 10 ppm Au3+ was found to be highly toxic to Sporosarcina ureae, killing 109 bacteria/mL withi
Jan 1, 2000
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The Immobilization Of Free Ionic Gold And Asparagine-Complexed Ionic Gold By Sporosarcina Ureae: The Importance Of Organo-Gold Complexes In Gold Mobility
By W. S. Fyfe, G. Southam, T. J. Beveridge
Bacterial populations play an active role in mineral weathering in subsurface and near-surface environments e.g., supergene enrichment of Cu at Morenci, AZ. An invitro bacterial biofilm model was use
Jan 1, 1999
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Evaluation Of A New Method For Work Index Estimation Using Single Particle Impact Tests
By R. P. King, M. K. McCarter, K. S. Free
Mine plans typically consider the profits and costs associated with extracting and processing minerals into marketable products. Interrelationships between mine and mill costs are often overlooked dur
Jan 1, 2004
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Demonstration Campaign Results on a Cyanide-Free Process for Gold Extraction from a Refractory Pyrite Concentrate (SME Annual Meeting Feb. 19 - 22, 2017, Denver, CO)
By . A. Drouin, J. -M. Lalancette, D. Lemieux, C. Chouinard
"A gold bearing pyrite concentrate was treated at the demonstration scale (15 t/d) for the extraction of gold using a cyanide-free process. The pyrite was depressed in the flotation circuit in order t
Jan 1, 2017
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Measurement of Weak and Dissociable (WAD) Cyanide with a Modified Potentiometric Titration (2f96b3c7-cd93-45e1-89c3-eb9c4c7da7e0)
By I. Ward, E. Milosavljevic, M. Botz
"The silver nitrate titration method is a rapid and acceptably accurate means of analyzing for cyanide in leach solutions that contain primarily free cyanide. However, in leach solutions containing el
Jan 1, 2015
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Effects of Wellbore Liquids in Propellant-Based Fracturing
By J. F. Cuderman
In situ experiments at the Department of Energy's Nevada Test Site (NTS) have extended the technology of propellant-based fracturing to include liquid- filled, uncased boreholes. Previous work ha
Jan 1, 1986
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Effect of Surface Treatment on the Acid-base Properties of Fillers and Pigments
By Roe-Hoan Yoon, lsmail Yildirim, Jinhong Zhang
Inorganic fillers and pigments such as kaolin, diatomaceous earth silica, and talc were treated with various surfactants, and the changes in their surface properties monitored. When they were treated
Jan 1, 2003
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Biological Treatment Of Cyanidation Wastewaters ? Introduction
By Terry I. Mudder
Metal complexed cyanides in wastewaters form as a result of interactions of free cyanide with metals present in the wastewater and exhibit varying degrees of stability, toxicity, and treatability. Thi
Jan 1, 1984
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Supercritical revolutions of tumbling mills
By W. Swisterski, G. Romaniszyn, S. A. Lukasiewicz
The present paper analyzes the motion of a particle of material in a horizontaly rotating tumbling mill. The sliding of the particle under action of dynamic and friction forces and its free flight fa
Jan 1, 1991
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Single Fracture Of Brittle Spheres
By N. Arbiter
Fracture under low velocity free-fall and double impact, and under slow compression have been-investigated. The pattern of breakage and the size distribution of resulting fragments for sand-cement and
Jan 1, 1968
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Spigot Design Modification to Alleviate Roping in Hydrocyclones
By S. S. Pathak, S. Mishra, M. H. Tyeb, A. K. Majumder
Roping in hydrocyclones is a well-known phenomenon in mining and mineral industries which put serious restrictions on their continuous and maintenance free operation. Roping is mostly observed in asso
Jan 8, 2022
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Improved Mine Fire Diagnostic Techniques
By C. D. Litton
This paper describes two new gas diagnostic techniques which have been used successfully to determine: 1) the combustion status of underground mines which have been sealed due to fire (Littol1 Ratio);
Jan 1, 1989
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Studies Of The Interactions Between Talc And Stickies During Paper Recycling
By J. L. Yordan, J. Kortmeyer, I. Yildirim
Talc is used to remove stickies from pulp during paper recycling processes. It is well known that the interaction is controlled by the surface chemistry at the talc/water, sticky/water and talc/stick
Jan 1, 2002
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Cyancor On-stream Cyanide Analyzer
By Stephen Young
The continuous monitoring of free cyanide levels is an important part of gold recovery operations. Accurate and up to the moment knowledge of the free cyanide concentration can result in substantial c
Jan 1, 1995
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Cyanide Analysis Of Mining Effluents By Specific Ion Electrode
By Robert M. Mann
The Ag/S specific ion electrode has been evaluated for analysis of both free and total cyanide. Metal cyanide solutions were prepared from reagent grade compounds and by stoichiometric fixture of the
Jan 1, 1981
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Federal Coal Leasing Policy Competitive And New Entrants
By Robert Bohman
I truly free enterprise system requires free and unrestricted competition among a diversity of suppliers, in order to function properly. The natural attrition of the marketplace tends on the one hand
Jan 1, 1982
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An Update On “The Good, The Bad, And The Ugly” Silica--Revisited
By E. A. Metz
It has been approximately four years since IARC reclassified crystalline silica as a “Group One” substance. Since that time, crystalline silica has been considered a human carcinogen. Silicosis i
Jan 1, 2000
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Enhancement Of Roller Cutting By Means Of Water Jets
By Noel C. Joughin, Orrie Fenn, Brian E. Protheroe
Work has shown that the use of high-pressure water jets enhances the performance of mechanical cutting in very hard rock. To assess the potential of this approach for use in conjunction with free roll
Jan 1, 1985
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Gravity Concentration At The Telfer And New Celebration Gold Mines
By A. Goulsbra, S. Gregory, P. Gelfil, V. Martins, R. Dunne
As a general rule for gold treatment the presence of reasonable amounts of 'coarse' free gold will dictate the use of a gravity circuit. The actual particle size of gold that constitutes the portion
Jan 1, 1996