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Rare Earth Elements - SME Statement
It is crucial to reestablish a domestic rare earths minerals production industry to help secure the Nation's clean energy future, reduce the U.S. vulnerability to material shortages related to na
Jan 1, 2011
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Increasing Coarse Particle Recovery Using The Flsmidth Selective Froth Recovery System
The recovery of coarse particles has been widely recognized as being limited by the froth in mineral flotation. In response to this, FLSmidth has developed the Selective Froth Recovery (SFR) System.
Feb 27, 2013
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Experimental Protocol Enabling The Use Of X-Ray Photoelectron Spectroscopy In Concentrators. Case Study: Regrinding Stage
By G. Montes-Atenas
Throughout the years, research studies have reached a consensus in acknowledging the relevancy of surface chemistry phenomena on minerals separation and metals extraction. Many techniques, and notably
Feb 27, 2013
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Kaolin and paper : Quality of both products will improve with more sophisticated printing techniques
By Kenneth J. Hartman
Introduction The term kaolin is derived from kauling, a Chinese word meaning high ridge. This was the name of a hill in China where kaolin was first mined several hundred years ago (Murray, 1976). Ot
Jan 4, 1987
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How Smoke Hinders Escape From Coal Mine Fires
By F. N. Kissell, C. D. Litton
This study predicts the level of smoke that miners might meet while trying to escape a coal mine fire and describes how smoke would impede their safe escape. For this study, the authors assumed that m
Jan 1, 1993
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Rational Design Of Yield Pillars: Improved Understanding Of Yielding Mechanism
By K. T. Lee, M. U. Ozbay, M. D. G. Salamon
Design of yielding chain pillars in deep coal longwall mines is not as well established due mainly to the lack of knowledge in the behavior of coal pillars in the post-peak regime. This study shows t
Jan 1, 2001
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Arsenic and Antimony in Oxidized Concentrate Particles
By S. Strömberg, A. Jokilaakso
Two complex copper concentrates and one arsenical nickel concentrate were oxidized in simulated flash smelting conditions using a laminar-flow furnace. The concentrates contained tetrahedrite as Sb-be
Jan 1, 1998
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Drum Hoist Ropes -Selection And Maintenance (PREPRINT NUMBER 92-96)
By J. M. Manka
American mining companies operate many drum hoists that hoist from various depths with varying payloads. This paper will review the procedure of selecting optimum wire rope constructions for these exi
Jan 1, 1992
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Numerical simulation on diffusion phenomena in mine airways by using a method of discrete tracer movements
By K. Sasaki
Diffusion phenomena in mine airways are important to trace gas and dust introduced into mine ventilation flows. Authors have carried out tracer gas measurements to check mine ventilation using concent
Jan 1, 2009
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Cuprex – new chloride-based hydrometallurgy to recover copper from sulfide ores
By Enrique Hermana, Raymond F. Dalton, Raymond Price, Barry Hoffman
Introduction Chloride leaching of sulfidic ores has been known about for 100 years. It is recognized as a highly efficient process to produce concentrated leach solutions. Despite this, chloride leac
Jan 1, 1988
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New Bulkhead Design For Controlling Increased Hydrostatic And Dynamic Hydraulic Pressures
By George Watson, Gu Quanzhong, S. Gerard Sawyer
Bulkheads, also known as hydraulic seals, are used to seal abandoned workings and protect adjacent active mines from explosion and control unwanted inflows of water from poorly sealed shafts, water-be
Jan 1, 2005
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Investigation And Modeling Of Longwall Face-To-Face Transfers
By E. Topuz, C. Patrick
Longwall face-to-face transfers can cost more than $100 per minute in lost production potential and $100,000 for personnel and supplies. Such high costs make extensive planning and control of the tran
Jan 1, 1994
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Applications Of Passive Seismic Imaging In Underground Mining
By Ma. X.
Passive seismic imaging is applied in underground mining to analyze the stress redistribution after the occurrence of a major seismic event. The velocity model is established to be utilized in velocit
Feb 27, 2013
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Kansas River Tunnel Shaft Drilling
By Clay Haynes
While the Kansas River Tunnel is a relatively short, small diameter tunnel, the shaft excavation methods implemented were long and large on innovation and use of reverse circulation drilling equipment
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Electrical Accidents In The Mining Industry, 1990-1999 (a667b09a-202f-425d-9b08-95e0dee3b098)
By J. C. Cawley
This National Institute for Occupational Safety and Health study was conducted to focus future research on the most significant electrical problems in the mining industry. Data from 1,926 mine electr
Jan 1, 2002
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Load Sharing Methods Of Backstops In Conveyor Drive Systems
By K Timtner
As shown in former publications there are problems in load sharing of backstops in multiple drives of conveyors. Therefore, detailed calculation methods and design recommendations are required. In thi
Jan 1, 1998
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Improvements Seen in Acid-Mine-Drainage Technology
By William R. Yernberg
The Fifth International Conference on acid rock drainage (ICARD 2000) was held May 21-24, 2000, in Denver, CO. The three-day conference consisted of about 150 oral presentations and poster sessions t
Jan 1, 2000
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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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Technology News – Automated-Plow Longwall Ordered for Chinese Coal Mine
German manufacturer DBT signed a contract to supply a sixth automated-plow long-wall system to Shenyang Coal in Liaoning province in northeastern China. This most recent order occurred just weeks aft
Jan 1, 2004
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Safeguards To Prevent Airflow Reversal From Ventilation Changes
By R. D. Peterson
As underground mine operations expand, the ventilation systems supporting them become complex. Complexity increases with periodic ventilation changes. New diagonal connections require a rebalance of
Jan 1, 2012