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Surface Free Energy Characterization Of Fine Particles
By I. Yildirim
Free energy of interaction between particles in water can be calculated if one knows the values of appropriate interfacial tensions, which in turn can be determined from the surface free energies of t
Jan 1, 2002
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Removal Of Dolomite From Phosphatic Ore
By Mengxiong Guo, Xuxin Shao
The recent depressant research is summarized, and a new kind of depressant (SCO) has been put forward in this article. Using Na-oleate as a collector and SCO as a depressant, separation of dolomite an
Jan 1, 1989
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Leaching Of Nickel And Cobalt From Acid Mine Drainage Sludge
By S. P. Fleming
An acid mine drainage sludge containing 0.26% nickel, 0.21 % cobalt and 4.5% manganese was leached in a one-liter reactor with sulfuric acid in the absence and presence of sodium sulfite. The effects
Jan 1, 1992
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Discriminating between different genetic types of marine ferro-manganese crusts and nodules based on rare earth elements and yttrium
By Andrea Koschinsky, Akira Usui, Michael Bau, Katja Schmidt, James Hein, Thomas Kuhn
Marine ferro-manganese (Fe-Mn) crusts and nodules are metal-rich chemical sediments that are archives of paleoceanographic proxies and potential metal resources and targets of deep-sea mining. Traditi
Sep 1, 2014
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Slurry Pump Design Features
By George Wilson
When pumping abrasive slurry mixtures, special attention must be given to pump design and construction. The second article in this two-part series describes some design features to consider when selec
Jan 10, 1981
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Managing Safety In The Mining Industry
By F. Nelson
RJB Mining is the largest coal producer in the UK. In January 1995 the Company acquired the Central North and Central South Regions of British Coal consisting of: ? 15 operating collieries -includin
Jan 1, 1998
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Canadian Companies Make Their Pitch At PDAC
At the Prospectors and Developers Annual Convention (PDAC) in Toronto, Canada mining and exploration companies of all sizes were on hand to discuss the year that was and those that will be. The follow
Jan 1, 2009
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Opencast Mining Of Brown Coal In Eastern Europe (53316393-306c-401a-9c67-5ad911520cfd)
By Yoginder P. Chugh
Most mines are large producing 0-25 mmt annually. The coal is mine.) at depths ranging from .0-150 m 120-500 ft mining at 300 m .(,1000 ft) depth is anticipated in the future. Single and multiple seam
Jan 1, 1980
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Utilizing Mineralogy In Process Development For Hecla's Lakeshore Project ? Introduction
By Theodore S. Jordan
The discovery of a major porphyry-type copper deposit on the Papago Indian Reservation in Pinal County, Arizona was announced by El Paso Natural Gas Company in 1968. The deposit, known as the Lakeshor
Jan 1, 1985
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Utilization of Strain Measurements on Shielded Tunnel Boring Machines
By Brad Murray
Evaluating the performance of a shielded tunnel boring machine (TBM) can be difficult because the ground cannot be observed directly and in relation to the TBM attitude within the excavation. It is di
Jan 1, 2008
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Low-Rank Coal Ash Characterization- Washability And Utilization Implications – Preprint 97-132
By P. D. Rao, D. E. Walsh
Chemical and physical properties of typical low-rank coal (LRC) ash are significantly different than bituminous coal ash. With the exception of extraneous ash, which is incorporated during mining or i
Feb 24, 1997
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TGA Kinetic Analyses of Zinc Ferrite Reduction with H2 (Mining, Metallurgy & Exploration)
By VIVEK KASHYAP, Evody Tshijik Karumb, PATRICK TAYLOR
The partial reduction of zinc ferrite to zinc oxide and iron (II, III) oxide can enhance the leaching rate of zinc. Zinc ferrite has often been found as a major component of zinc residues and electric
Jul 26, 2022
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Investigation of the Rockburst Mechanism of Driving Roadways in Close-Distance Coal Seam Mining Using Numerical - Mining, Metallurgy & Exploration (2021) Modeling Method
By Stanisław Prusek, CHONG WEI, Huawei Xu, Jun Wang, Andrzej Walentek, Artur Dyczko, Derek B. Apel
The excavation-induced stresses transferred from the panels or pillars in upper coal seams play a key role in the occurrence of rockbursts in driving roadways during close-distance coal seam mining, w
Aug 26, 2021
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Mine Equipment Maintenance And Inventory Control ? Introduction
By John Jonkman
The cost of equipment maintenance is the largest single expense at many mines and processing plants. It is not unusual for a maintenance and repair budget to be larger than 50% of the punt's tota
Jan 1, 1986
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Industry's Best Technology Showcased at 2014 - SME Annual Meeting 2022
By Georgene Renner
With more than 800 booth spaces sold and 540 exhibiting companies displaying their wares, there was something for everyone on the exhibit floor of the 2014 SME Annual Meeting in Salt Lake City, UT Feb
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New Miner Training for the 21st Century
By Daniel H. McClain
A unique partnership between the Colorado Mine Safety and Training Program (CMSTP), the Colorado Rock Products Association (CRPA) and the Higher Education and Advanced Technology (HEAT)Center resulted
Jan 1, 2003
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Closing the Historic Alaska-Juneau Mine
By Joseph L. Petrillo
In July 1997, Kvaerner Environmental signed a unique contract with Echo Bay Alaska called the Transfer Risk and Accelerate Closure (TRAC). The contract called for Kvaerner to assume the responsibilit
Jan 1, 1999
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Fuzzy Logic Self-Tuning PID Controller Design for Ball Mill Grinding Circuits Using an Improved Disturbance Observer Mining, Metallurgy and Exploration
By Hamed Khodadadi, Hamid Ghadiri
In this study, a fuzzy logic self-tuning PID controller based on an improved disturbance observer is designed for control of the ball mill grinding circuit. The ball mill grinding circuit has vast app
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Fuzzy Logic Self-Tuning PID Controller Design for Ball Mill Grinding Circuits Using an Improved Disturbance Observer Mining, Metallurgy and Exploration (ad065287-325d-4c37-9f3a-f3531e4c1359)
By Hamed Khodadadi, Hamid Ghadiri
In this study, a fuzzy logic self-tuning PID controller based on an improved disturbance observer is designed for control of the ball mill grinding circuit. The ball mill grinding circuit has vast app
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Ground Support Systems for Heavy, Squeezing Ground at Burgin Mine
By Donald O. Rausch, William E. Hawkes, Odin Jr. Strandberg
INTRODUCTION Kennecott Copper Corp.'s Tintic Div. Burgin mine is a 725 t/d (800 stpd) lead-zinc producer, located in the east Tintic mining district, 5.6 km (3.5 miles) east of Eureka, and 130
Jan 1, 1982