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Extraction of Gold From a Carlin-Type Ore Using Thiourea
By R. A. Pyper, J. L. Hendrix
Laboratory leaching experiments were conducted to ascertain the effectiveness of acidic solutions of thiourea, CS(NH2)2, for dissolving gold from finely disseminated gold ores. The ore tested was from
Jan 1, 1981
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The Significance Of Filter Cake Pore Structure As Determined By Micro-Ct In The Analysis Of Filtration Phenomena
By J. D. Miller, C. L. Lin
Filtration of fine particles involves filter cake formation and removal of surface moisture by drawing air through the porous structure. Accurate assessment of the transport properties of porous medi
Jan 1, 2002
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Successful Application Of Remote Seals Used To Extinguish A Coal-Mine Fire
By D. Bour, C. Nyikos, R. Curtice
Fire in a coal mine can be disastrous on many levels. In most cases, when a fire is detected, mining operations cease and all personnel are evacuated. Underground coal-mine fires are difficult to exti
Jan 1, 2002
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Inductive Electrostatic Gradiometry (IESG) Deciphers Keweenawan Copper Plumbing System
By J. Trow
Dowsing is really IESG which inductively locates electric gradients (dv/dx) on the flanks of SP anomalies. "Sensors" are in one?s head. The "meter" consists of one?s body, limbs, and two $.69 welding
Jan 1, 1992
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Promising Options for Solving the Dolomite Problem of the Florida Phosphate Resources—a Brief Review Mining, Metallurgy and Exploration
By Dapeng Zhang, Brij Moudgil, Shibo Zheng, Chunhui Feng, Wenyi Song, Wending Xiao, Patrick Zhang
Separation of dolomite from phosphate is the most challenging problem in phosphate mineral processing. Over 50% of the future phosphate reserve in Florida contains too much dolomite to process using t
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Solving a conundrum: Why a conventional wet gravity circuit was abandoned in flowsheet design for a garnet project in Central Australia
By S. J. Benson
The Harts Range deposit, owned by Olympia Resources is located some 130 kms northeast of Alice Springs, in central Australia (part of Australia’s Northern Territory). The core economic minerals here
Jan 1, 2005
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61st Iteration of MINExpo Upbeat, Optimistic
By Tim O’Neil
“America’s mining industry brings good jobs to communities across America and provides the energy, minerals and equipment that are vital to our economic security and our way of life.” That was the
Jan 1, 2004
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Underground Mine Management Systems
By James Wm. White
Today a large number of open pit mines use computer-based mine management systems to automatically assign haul trucks, track equipment, and manage information. Now advances in digital communications a
Jan 1, 1996
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Mineral Appraisal Issues In Court Testimony
By J. S. Limb
Actual issues which arose during the discovery process or subsequent court testimony are presented. While most of these issues relate to the author’s specialty of mineral appraisal some are more g
Jan 1, 2001
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Assessing the contribution of underground in-situ coal gasification (UICG) within a sustainable development framework
By Z. Hyder, M. Karmis
Underground or In-situ Coal Gasification (UCG or UICG), though not a new concept, is now attracting considerable global attention as a viable process to provide a "clean" and economic fuel from coal.
Jan 1, 2011
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Activated and Natural Sodium Bentonites and Their Markets
By Kent von Maubeuge, Charles R. Landis
The global bentonite industry is a dynamic market balancing a range of end uses with an ever growing number of bentonite producers. In addition, markets in developed countries are elevating the level
Jan 1, 2004
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Activation Mechanism of Lead Ions in the Flotation of Rutile Using Amyl Xanthate as a Collector Mining, Metallurgy and Exploration
By Qinbo Cao, Qianshan Peng, Heng Zou, Xingcai Yu
In this work, a new flotation strategy was proposed for the flotation of rutile. In this strategy, rutile was activated by Pb(NO3)2 and then floated with amyl xanthate (AX) as a collector at pH 8. Pb(
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Activation Mechanism of Lead Ions in the Flotation of Rutile Using Amyl Xanthate as a Collector Mining, Metallurgy and Exploration (4401b4da-c269-4538-8819-8ae624ce5432)
By Qinbo Cao, Qianshan Peng, Heng Zou, Xingcai Yu
In this work, a new flotation strategy was proposed for the flotation of rutile. In this strategy, rutile was activated by Pb(NO3)2 and then floated with amyl xanthate (AX) as a collector at pH 8. Pb(
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Developing And Implementing An Enterprise Reliability Strategy (ERS) In Mining Operations
By J. W. Davis
In the last few years major industrial companies have begun to realize the importance of Reliability as an enterprise strategy that, properly implemented, will improve financial performance. Typical
Jan 1, 2003
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Rheology of ore suspensions with fibrous minerals and its impact on flotation performance Mining, Metallurgy and Exploration
By P. Somasundaran, D. R. Nagaraj, Tarun Bhambani, P. Patra
Flotation separation and recovery of value minerals from ores containing fibrous silicate minerals are known to be quite challenging. Earlier studies have established that the metallurgical challenges
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Experimental Study Of Residence Time Distributions Of Ball-Mill Circuits Grinding Coal-Water Mixtures
By K. Shoji
Residence time distributions (RTDs) were estimated by water tracing in a number of wet overflow ball mills (diameters 0.38 to 4.65 m) producing dense, coal-water slurries. In open-circuit mills of 0.3
Jan 1, 2008
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Water Tunnel Beneath New York Harbor
By Mohammad R. Jafari
The Camp Dresser & McKee (CDM)/Hatch Mott MacDonald (HMM) joint venture has been engaged by the New York City Economic Development Corporation (NYCEDC) to provide engineering ser-vices in connection w
Jan 1, 2008
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Use Of The Multiple Accounts Analysis Process For Sustainability Optimization
By S. Shaw
There is an increasing requirement for mines to meet a certain minimum criteria for sustainability within the context of the physical environment, ecosystem and socio-economic system in which they are
Jan 1, 2004
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The effects of ventilation controls and environmental cabs on diesel particulate matter concentrations in some limestone mines
By J. D. Doll
MSHA has promulgated a rule to limit the exposure of underground metal/nonmetal miners to diesel particulate matter (DPM). In May 2008, the final personal exposure limit will be lowered to 160 µg/m3 t
Jan 1, 2009
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High Performance Tunnel Boring Machine for Kárahnjúkar Headrace Tunnel, KAR-14—A Design and Case History
By Brian Khalighi, Massimo Franceschi, Giovanni Giacomin, Gianni Porta
Headrace Tunnels and parts of the Access Adit Tunnels of Kárahnjúkar Hydropower project, KAR-14, in Iceland will be excavated using three full-face Robbins Tunnel Boring Machines (TBM). TBM sizes rang
Jan 1, 2005