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Freeze-sampling method of collecting drainage sediments for gold exploration
By J. S. Coats, G. E. Patts, N. Hughes
Conventional sampling methods are known to suffer from the variable loss of fine gold by elutriation. Freeze sampling yields representative and quantitative data that, when combined with information o
Jan 1, 1991
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Empirical approach to prediction of damage in bench blasting
By S. G. Beattie, N. Mojtabai
A study was carried out which aimed to: determine the effects of blasting on excavation perimeters and nearby slopes; establish a low-cost blast monitoring and field observation programme to determine
Apr 1, 1996
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Method for assessment of rock drillability incorporating the Protodyakonov index
By T. Serradj
A study has been carried out to: develop a method for routine characterisation of rock strength and drillability through the particle-size distribution of crushed or drilled rock products, defined by
Dec 1, 1996
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Isotopic evidence for the origins of a Caledonian gold-arsenopyrite-pyrite deposit at Clontibret, Ireland
By J. H. Morris, G. M. Steed
Paper presented at Mineralisation in the Caledonides, the Mike Gallagher memorial meeting held in Edinburgh, 27-28 June 1996. Oxygen isotope analysis indicates that quartz, carbonates and muscovite co
Jun 19, 1905
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Effect of pore diffusion on reacitvity of lump coke
By G. M. Zhao
The gasification of lump coke with CO2 was studied in a fixed-bed reactor. The effective diffusivity of the gas was evaluated from measurements of the reactivity of the lump coke, produced by BHP Stee
Jun 18, 1905
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Determination of optimum conditions for dissolution of ulexite in sulphuric acid solutions
By S Colak, M Tunc, C Celik, M. M. Kocakerim
The most important parameters affecting the solubility of ulexite (sodium calcium borate) in H2SO4 were found to be reaction temperature and solid:liquid ratio, in that order. Dissolution increased w
Jun 21, 1905
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Kinetics of oxidation of MoO2 to MoO3 by oxygen at elevated temperatures
By E Oktay, I Yusufoglu, C Kahruman
Powder and spherical pellets of MoO2 were oxidised under controlled conditions in the temperature range 674-791 K at oxygen partial pressures of 8.1-30.4 kPa. Weight increase during the reaction was d
Jun 21, 1905
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Catalytic effects in CaO-enhanced reduction of copper sulphide: Cu2S-CaO-C system
By M. Moinpour, Y. K. Rao
The catalysed direct reduction of copper sulphide with carbon and lime was investigated in the range 850-1000 degrees C using Cu2S-CaO-C and Cu2S-4CaO-4C reaction mixtures. The effects of the catalyti
Jul 1, 1991
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Leaching of Dominican gold ores in iodide-catalysed thiocyanate solutions
By S. P. Ball, A. J. Monhemius
In a laboratory study under acidic oxidising conditions, the thiocyanate system gave results at least as good as cyanide and considerably better than thiourea, with modest consumption of SCN (less tha
Dec 1, 1995
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Bjorkdal gold-mining project, northern Sweden
The deposit was discovered during systematic reconstruction of the geological history of glacial overburden, which averages 6 m in thickness over 80% of Sweden, by geochemical sampling and searching f
Dec 1, 1995
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A future in coal: viable or not?
By G. Kill
Although other energy commodities have developed successful futures contracts, long-term contracts still dominate the coal market. To establish whether coal markets will develop in the same way, coal
Aug 1, 1994
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Coastal superquarry: design and proposed development of Rodel Quarry on South Harris, Outer Hebrides, Scotland
By D. R. Wardrop, G. Walton
Paper presented at the UK minerals industry conference held in Leeds, UK, 3-5 April 1995. A description is given of the approach that has been taken to the design of the 550 000 000 t superquarry with
Jul 1, 1996
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Characterisation of Bangladesh ilmenite and study of its reduction mechanism by X-ray diffraction
By A. S. W. Kurny, M. Z. Huq
Bangladesh ilmenite is partially altered, containing pseudorutile, rutile and haematite as well as the predominant ilmenite phase. A typical analysis is 39.45% TiO2, 24.19% FeO and 33.0% Fe2O3. Reduct
Jun 19, 1905
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Comparison of stereological correction procedures for liberation measurements: discussion
By C. L. Schneider, C. O. Gomes, R. P. King, J. A. Finch, D. Lin
Discussion is presented by Prof. King and Dr. Schneider of the paper by Lin, Gomez and Finch published in Trans.IMM C, vol.104, 1995, p.C155-C161. They conclude that the correction procedures used for
Jun 19, 1905
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Dense-medium cyclone model based on the pivot phenomenon
By I. A. Scott, T. J. Napier-Munn
Size-by-size partition curves for mineral separation in dense-medium cyclones pivot about a single characteristic point. This is defined for stable, non-segregating media by the medium density and the
Jan 8, 1992
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Replacement mineralization styles and breccia dome formation at Dirtlow Rake fluorite-barite deposit, Castleton, England
By C. A. Jeffrey
The Dirtlow Rake vein deposit, which is up to 12 m thick, contains a range of paragenetically linked replacement mineralisation styles typical of many Mississippi Valley-type deposit environments. The
Jun 19, 1905
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Improved crushing chamber of a cone crusher
By A. L. Grabovski
The potential of eccentric cone crushers for fine crushing has been improved by increasing the swing frequency of the moving cone, balancing the crusher, ensuring uniform feed via a rotating funnel wi
Jun 21, 1905
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Critique of exhalative hypothesis of tungsten skarn formation; discussion
By P. R. Ineson, D. W. James
For a criterion to be useful it must either demonstrate directly the role of exhalative processes in the formation of a deposit or describe a unique attribute of exhalative deposits. Few of those empl
Jan 12, 1993
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Standardisation of powered roof for longwall faces
By S K. Das
An intensive investigation into modern roof support technology, including hy draulic and control systems, has been carried out against the perspective of global development and support behaviour on lo
Jan 4, 1997
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Laboratory technique for evaluation of methods of suppressing nuisance dust
By S. P. Godby, S. P. Sharples
Wind-tunnel tests were carried out of the conditions under which nuisance dust particles (100-1 000 micrometres) become entrained by wind. A laser entrainment monitoring system (LEMS) was used, and wa
Jun 19, 1905