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Smelting reduction of carbon-chromite composite pellets: part 1: reduction kinetics and mechanism; part 2: dissolution kinetics and mechanism
By Y. L. Ding, N. A. Warner
Cylindrical pellets made from graphite and chromite mixtures were reduced in high-carbon ferrochromium melts at 1 600-1 695 degrees C, under an atmosphere of almost pure CO. The reduction rate, as mea
Jun 19, 1905
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Sulphide-silicate reactions as a guide to Ni-Cu-Co mineralization in central Maine. U.S.A.
By A. J. Naldrett
"Synorogenic mafic intrusions are a common feature of the northern Appalachians. Two sulphide-bearing intrusions in central Maine that have been investigated revealed a number of important features th
Jan 1, 1984
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Controls on scale of Porgera-type porphyry/epithermal gold deposits associated with mafic, alkalic magmatism
1994 estimates for Porgera are probable and proven reserves of 58 200 000 t of ore grading 5 g/t Au. Gold mineralisation is related to an intrusive complex emplaced at shallow levels in poorly consoli
Jun 19, 1905
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The Constitution of Matte
By Ruddle R. W.
Solid mattes are generally held to be either (a) eutectiferous mixtures of the component sulphides Cu2S and FeS or (b) mixtures of complex sulphides. This chapter shows that liquid mattes consist esse
Jan 1, 1953
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Reliability and availability analysis of mining systems
By Tuncel M. Yegulalp, Selamet G. Ergelebi
A description is given of a method of analysing modern mining systems in terms of reliability and their effects on productivity. Non-exponential distributions, such as the Weibull and lognormal distri
Jan 4, 1993
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Study of bucket trajectory in automatic scooping with load-haul-dump loaders
By A. Hemami
In order to automate the operation of mechanical loaders it is essential to have a knowledge of the forces that act on the bucket and of the trajectory that the bucket should follow. A trajectory for
Jan 4, 1993
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Thermodynamic properties of magnesium chloride ammines
A study of the thermodynamic properties of magnesium chloride ammines was carried out with the ultimate objective that the thermal decomposition of the hexammine MgCl2.6NH3 may prove successful on a c
Jun 13, 1905
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Sampling variability of stream sediments in broad-scale regional geochemical reconnaissance
By R. J. Howarth, P. L. Llowenstein
The errors resulting from field sampling, sample preparation and analysis are investigated for drainage sediments derived from homogeneous sandstone, shale, limestone, basic igneous and granite lithol
Dec 1, 1971
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Nickel sulphide mineralization in the lick fork prospect, Virginia, U.S.A.
By K. C. Misra, W. Wrightson Jr.
The Lick Fork prospect shows appreciable nickel sulphide mineralization in a narrow, steeply dipping, layered sequence of metamorphosed hornblende peridotite, gahhro and hornblende gahhro, intrusive i
Jan 1, 1984
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Spessartine-quartz rock (coticule) occurences in New Brunswick, Canada, and their use on exploration for massive sulphide, tin-tungsten and gold deposits
By D. V. Venugopal, W. W. Gardiner
Spessartine-quartz rocks are manganiferous sedimentary rocks rich in spessartine and quartz which occur in north-central New Brunswick. They represent a recrystallised manganiferous siltstone/chert th
Jan 12, 1992
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Characterization of feldspar texture and liberation by automated image analysis
By W. Petruk, M. J. Matos
An aplite ore from Guarda in northern Portugal, containing albite, microcline and quartz and muscovite gangue was studied to identify conditions for extracting the feldspar minerals. The large amounts
Jun 18, 1905
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Synthesis of grinding time-size reduction relationships
By P. C. Kapur
Several empirical and semi-empirical laws of comminution, which describe the relationships between the cumulative grinding energy input and the degree of size reduction of brittle solids, have been ra
Dec 1, 1971
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Blasthole stoping - drilling accuracy and measurement
By F. Boudreault, M. J. Scobie, J. Szymanski, C. Hendricks
The development of new stoping methods and more effective control over dilution, recovery and fragmentation depends on improved accuracy in blasthole drilling. The mechanisms and factors which control
Jan 12, 1992
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Recent developments in mineral exploration in the northwest highlands and islands of Scotland
By D. Newman
Mineral production in the Highlands and Islands of Scotland during the last ten years has been confined to the sporadic production of industrial minerals—for example marble, anorthosite, limestone, ta
Dec 1, 1971
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Metamorphically and hydrothermally mobilized Fe-Ni-Cu sulphides at Kambalda, Western Australia
By C. M. Lesher, R. R. Keays
"The komatnte-associated Fe-Ni-Cu sulphide mineralization at Kanihalda, Western Australia, is generally believed to be magmatic in origin, but a number of postmagmatic processes significantly modified
Jan 1, 1984
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Aspects of metallogenesis within the southern Caledonides of Great Britain and Ireland
By C. J. V. Wheatley
Recent studies of the mineralisation at Avoca in southeast Ireland, Parys Mountain in Anglesey, and Coniston in the Lake District result in the proposal of a new metallogenetic model for mineral depos
Dec 1, 1971
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Opttimisation of development layyouts for retreat longwall mining with particular reference to the Australian coal mines
By R D. Lama, A Misra
One of the major factors restricting an increase in the productivity of a longwall mine is lower productivity obtained in a development panel. There has been a significant improvement in gate road dev
Jan 9, 1996
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Geological review of the agnew nickel deposit, Western Australia
By L. G. Billington
"The Agnew nickel deposit occurs in a major linear greenstone belt in the Archaean Eastern Goldfields Province of Western Australia, and has been subjected to mid-amphibolite facies nietamorphism of d
Jan 1, 1984
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Sintering mechanism of Western Australian pisolitic limonite
By J. Ostwald, L. T. Matthews, C. E. Loo
Australia has large reserves of pisolitic limonite. Mining recently commenced on the Yandicoogina deposit to produce a high-grade sintering ore. The ore contains about 10 wt% combined water and simul
Jan 12, 1992
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Botswana: Africa's most transparent state
By Schwartz M.
Respect for mining in Botswana is long-standing. This article looks at Africa's most transparent mining regime and some of its ambitious plans. Botswana's mining industry value is forecast to average
Mar 1, 2015