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Metal Bioaccessibility Methods in Risk Assessment
By A. Thatcher, C. Day, C. Meyer
The purpose of this paper is to provide general information about the bioaccessibility of metals and specific information about the use of bioaccessibility in risk assessments (human health risk asses
Jan 1, 2019
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3D Feed Belt Image Analysis
By L. B. Hales
Image analysis for feed belts and flotation has been used for over 20 years. It has been shown to aid in the modelling and optimization of Sag Mill circuits, and any improvements in the image analysis
Feb 27, 2013
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A Successfully Service Tested Hard Iron With Superior Abrasion And Corrosion Resistance Is Available For The Mineral Processing Industry.
By G. A. Calboreanu
One way of cost reduction is attained when using materials with improved erosion ? corrosion resistance. For many years hard irons successfully answered the Mining Operation needs however application
Jan 1, 2012
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Tunnel Boring Machine to be Used on Australian Decline Tunnel
On Dec. 20, 2013, an 8-m (26.2-ft) diameter Robbins hybrid single shield/earth pressure balance tunnel boring machine (EPB TBM) was launched to bore the Grosvenor decline tunnel for Australia?s Anglo
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Construction of a Mixed Face Reach Through Granitic Rocks and Conglomerate
By John J. Murray, Michael T. McRae, Michael A. Krulc, Kathy L. Schuler
The San Vicente Pipeline Tunnel Project involves the construction of an 8.5-foot-diameter water pipeline in an 11 mile tunnel in San Diego, California. The tunnel is located in extremely variable geol
Jan 1, 2007
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Optimization Of Heavy Media Cyclone Circuits
By T. S. Bomar, C. J. Wood
Heavy media cyclones (HMCs) are efficient, high-tonnage devices suitable for upgrading run-of-mine coal in the 50 to 0.5 mm size range. Unfortunately, industrial HMC circuits are often not optimized
Jan 1, 2002
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Froth Flotation With The Turbo Froth Flotation Column
By B. J. Arnold, N. Terblanche
The features of the ‘Turbo’ froth flotation column will be discussed, including the double aeration system that improves flotation yield while not sacrificing grade, the internal launder system, and t
Jan 1, 2001
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Dripping Into Subterranean Cavities From Unsaturated Fractures Under Ventilated Conditions
By R. Fedors, T. Ghezzehei, D. Or
The phenomena of dripping into cavities (e.g. tunnels and drifts) within an unsaturated fractured porous medium under ventilated conditions is studied to improve estimates of dripping rates, drop size
Jan 1, 2000
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Improvements On Blasting Technique For Headrace Tunnels
By Yoneji Kanoh, Masahiko Ohtsuka
In Japanese tunneling history, it has commonly been accepted that the long-round driving is difficult due to the complicated geological condition. Therefore, the maximum past record has been less than
Jan 1, 1983
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Reflected Light Microscopic Study Of The Mineralogy And Textures Of Experimental Nickel Concentrate Reactions With Slag (87248e93-6ecf-4234-acf7-380e66deeac9)
By H. Y. Sohn, R. D. Hagni, M. K. Kojo
Reflected light microscopy was used to study the mineralogy and textures of experimental reactions of a nickel concentrate with a slag. Such an interaction is an important step in the bath smelting o
Jan 1, 2001
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Flash Smelting at Magma Metals Co.
By Tom Gonzales
At San Manuel, AZ, Magma Metals Co. operates an Outokumpu flash furnace, four Peirce-Smith converters and two anode casting wheels that are supported by six anode vessels. Process gasses from the flas
Jan 1, 1992
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Benefits of a Good Quality Assurance Program to an Electric Utility
By W. J. Mahoney
A good quality assurance program at a coal mine or power plant is accurate, timely and consistent. The quality analysis is accurate due to a complete sampling of the coal stream loaded into the unit t
Jan 1, 1994
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Design Principles for Soft Ground Cutterheads
By Werner Burger
The last decade has witnessed a rapid development and application of slurry and EPB type tunnel boring machines. Both soft ground types are able to excavate tunnels in unstable ground conditions below
Jan 1, 2007
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Greenland: A Potential Trove of Minerals
By Louis W. Cope
Many Americans have seen Greenland while flying over it on their way to or from Europe. Few have visited this largest island in the world. Portions of the 20 percent of the territory that are not ic
Jan 1, 2004
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GIBE II Tunnel Project?Ethiopia: 40 Bars Of Mud Acting On The TBM ?Special Designs And Measures Implemented To Face One Of The Most Difficult Events In The History Of Tunneling?
By Antonio De Biase
In October 2006, a 7m Double Shield TBM, boring through very poor volcanic formations, was pushed back by fluid mud, which presence had not been detected during previous field investigations, due to t
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Cross-Border Mineral Investment Activity In The Pacific Rim
By C. R. Tinsley
Investment activity in the Pacific Rim of Fire has seen a phenomenal surge from epithermal gold exploration. Individual countries are attractive because of lower up-front minerals lease costs (US, Can
Jan 1, 1990
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Maintenance Contract on Cat 785 Trucks Works Well at Round Mountain
By J. B. Rasmussen
As part of a purchase of a fleet of Caterpillar 785 trucks, Round Mountain Gold Corp., Cashman Equipment Co. and Caterpillar Inc. entered into a four-year contract for the major maintenance of the fle
Jan 1, 1991
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Innovative NATM Technology for Suburban Tunnelling Metro Section 306, Bochum, Germany
By Axel Nitschke, Josef Arnold
Bochum’s Underground Lot 306 was characterised by a confined site and unique tunnelling methods. A highly mechanized construction concept was developed to achieve high progress rates. Bespoke backup s
Jan 1, 2005
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Coal Dust Wettability: It?s Role In Dust Control And Its Determination
By K. Mondal
A macroscopic approach integrated with microscopic analyses for wettability characterization is presented. Wetting depends on 1) Contact between the dust and the fluid droplets, 2) Wettability of the
Jan 1, 2012
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Ground Freezing A Proven Technology In Mine Shaft Sinking
By Paul C. Schmall
The link between artificial ground freezing and the mining industry stretches back more than 140 years, and across an ocean. Patented by the German scientist F.H. Poetsch in 1863, the technique is re
Jan 1, 2007