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7.1 Spangenberg - Sampling Standards In Anglogold Ashanti Gold Mines In Sa
By Conné Spangenberg
Contents ?Introduction ?Metal accounting environment ?Problem statement ?Investigations & Achievements ?Metal Accounting ?Principles ?Standards ?Audits ?Questions
Jan 1, 2005
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Mineralogical Solutions For Pyrometallurgical Problems
By L. Andrews
Keywords: mineralogy, phase-chemical, chemical-looping combustion, XRD, SEM, EDS, QEMSCAN, PGM, slag, matte, ilmenite Mineralogy, traditionally associated with concentrator studies, is being incre
Jan 1, 2011
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Theoretical, practical, and economic difficulties in sampling for trace constituents - Synopsis
Many industries base their decisions on the assaying of tiny analytical sub-samples. The problem is that most of the time several sampling and sub-sampling stages are required before the laboratory pr
Jan 1, 2010
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An engineering classification for rocks and rock masses
By T. Ramamurthy
ABSTRACT : Rock mass classifications RMR, Q and GSI do not suggest decreasing modulus ratio with the decrease in the quality of rock. These have been linked to joint factor, Jf , for better predictio
Jan 1, 2003
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Analysis of the Dispersion Variance Using Geostatistical Simulation and Blending Piles
The additive property of dispersion variances was found experimentally by D.G. Krige using data from the gold deposits of the Witwatersrand. In this property, called ?Krige?s relationship?, the disper
Jan 1, 2014
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Application of variography to the control of species in material process streams: %Fe in an iron ore product - Synopsis
The use of a time series variogram as an aid in controlling the quality of a product was pioneered by Pierre M. Gy and is described. The ability to analyse and interpret covariance relationships time
Jan 1, 2008
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Insights Into The Influences Of Paste Additions And Levels On Söderberg Electrode Management
By F. X. Prins, L. R. Nelson
Tight control of electrode paste additions, hard and soft paste levels, baked zone position and electrode temperatures are integral to superior Söderberg electrode management practices. Paste addition
Jan 1, 2004
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Low-Silicon Ferrosilicon Production From Iron Ore Materials In An Oxygen Reactor
By A. V. Pavlov, V. A. Grygorian, Kossyrev, A. E. Semin, A. Korostylev
A new way of producing low-silicon ferrosilicon from iron-ore materials in a new type of aggregate-oxygen reactor is presented. The oxygen reactor process is based on using the calorific combustibilit
Jan 1, 2004
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Evaluation of some optimum moisture and binder conditions for coal fines briquetting
By P. Venter, N. Naude
"Coal mining is a thriving industry and 53% of the coal mined in South Africa is used for electricity generation. Mechanization has made coal mining more efficient, but fines generation has subsequent
Jan 1, 2015
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Bindura Nickel Smelter - From Decommissioning, Care And Maintenance, To Plant Re-Start
By A. Mboma
Keywords: Furnace, decommissioning, care and maintenance, re-start, funding, nickel Bindura Nickel Corporation (BNC) operates two nickel mines, and treats concentrates from these mines as well as
Jan 1, 2011
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Development Of Modified Gas Indices For Early Detection Of Spontaneous Heating In Coal Pillars
By D. C. Panigrahi
Extensive field studies have been carried out to investigate the pillar fire problems in one coal mine in India. A Thermal IR gun and a Thermovision camera have been employed for thermal scanning to a
Jan 1, 2004
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A new preconcentration technique for the determination of PGMs and gold by fire assay and ICP-OES
By F. Rwere, A. Masasire, P. Dzomba, M. Mupa
Accurate determination of platinum group metals (PGMs) and gold (Au) has always proven to be a difficult task, due to their low concentrations in platiniferous ores. The most common preconcentration t
Jan 2, 2022
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Estimation of Rock Strength From Quantitative Assessment of Rock Texture
By C. A. Ozturk
The compressive strength of rock (sc) has an important effect on design of structures in rock engineering. Compressive strength can be determined in the laboratory using the uniaxial compressive stren
Jan 1, 2014
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Sampling: the impact on costs and decision making - Synopsis
The simple act of taking a sample implies that someone will use the information contained in the analytical result to make a decision about a course of action. In the mining industry, the decisions ma
Jan 1, 2007
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The Use Of Radio Frequency Transponders In Density Tracers To Conduct Coal Plant Efficiency Analysis
By D van der Merwe
Tracers of known densities are used world wide in coal processing plants to evaluate plant performance. Tracers are added to the feed stream and are counted after being recovered from the product and
Jan 1, 2006
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Production of Al-Ti master alloys from TiO2 in a DC arc furnace - Synopsis
By M. Abdellatif
The production of a 40% Al-Ti alloy was successfully proven at the lab scale, using pure TiO2, aluminium, and lime. These tests were conducted in an induction furnace maintained at 1600?16250C. The in
Jan 1, 2009
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Hazardous passage of Mrazovka tunnel under a reinforced concrete structure
By I. Zemanek, A. Rozsypal
Mrazovka tunnel was excavated under one building whose subsurface space was not possible to reinforce against additional settlements induced by digging. In the presented contribution the risk analysis
Jan 1, 2003
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Changing Minds??A White Flag? ? Synopsis
By J. L. Viljoen
t has long been the drive of the industry and all operations to create an environment that is free of injury and illness. We have come a long way; the leaders, executives, managers, supervisors and wo
Jan 1, 2011
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Copper solvent extraction on the African Copperbelt: From historic origins to worldleading status
By O. S. Tinkler, K. C. Sole
Approximately 20% of current world copper cathode output is produced using a hydrometallurgical process route, generally referred to as the leach–solvent extraction–electrowinning flowsheet. Since its
Jul 5, 2023
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A few remarks on storage of low temperature materials in rock caverns
By N. Kinoshita, Y. Inada
The authors have proposed and discussed storage of low temperature materials such as LNG, LPG and frozen food in rock caverns. In this case, as the rock mass around the caverns will receive effects of
Jan 1, 2003