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Power draw of wet tumbling mills and its relationship to charge dynamics, part 1: a continuum approach to mathematical modelling of mill power draw; part 2: an empirical appriach to modelling of mill power draw
The first part describes a model (the C model) based on the motion of the grinding charge. The charge is treated as a continuum, which allows analytical solutions to the equations that are developed.
Jun 18, 1905
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Tunnelling '94, 7th international tunnelling symposium held in London, 5-7 July 1994
By J. Temporal
An introduction to the conference material in this issue is given together with the issue contents list, closing remarks by its chairman Dr. J. Temporal, the list of contributors and their companies,
Jun 16, 1905
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The Prevention of Spontaneous Combustion in the South Yorkshire Area
By E. L. Evans
The historical development of South Yorkshire mining is traced and note made of the liability to generate spontaneous combustion of some of the seams which have been worked. The liability factor is an
May 23, 1905
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On the dynamic effect of frother-collector joint action in flotation
By J. Laskowski, J. Lekki
"The mechanism of joint action of a frother (alpha-terpineol) and a collector (ethyl xanthate) in the flotation of chalcocite has been examined. In order to study the dynamic effects of frother and co
Dec 1, 1971
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Extraction of copper from dry Salobo (Brazil) chalcopyrite concentrate and aqueous slurries thereof by chlorination with Cl2 gas
By E. A. Brocchi, P. K. Jena
Complete extraction of copper from Salobo chalcopyrite concentrate can be achieved in less than 10 minutes by chlorination of the dry concentrate with Cl2 at 450 degrees C and in 5 minutes by chlorina
Jan 4, 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
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The state of gold mining in Ghana
By D. Mireku-Gyimah, R. S. Suglo
Ghana contains auriferous belts which cover 51 800 km2 of its small area of 239 400 km2. From 1493 to 1600 35.5% of the world gold production was from the Gold Coast (renamed Ghana in 1957). This drop
Jan 4, 1993
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Liquid-phase mass transfer in top-blown open-channel flows
By N. A. Warner, R. K. Manna
Physical modelling of liquid-phase oxygen mass transfer in a water model of part of a proposed new polymetallic smelter has been achieved. A study of solute mass transfer caused by multiple, subsonic
Jul 1, 1991
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Bayesian approach to slope stability assessment by updating probability of failure treated as a random variable
By N. Powell, R. J. Pine
An algorithm is proposed for updating the probability of slope failure on the basis of sequential testing using Bayesian probability theory. The approach is novel and computationally straightforward s
Apr 1, 1996
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Prevention of Spontaneous Combustion in the Barnsley Area
By G. G. Lambert
The paper traces the pattern of spontaneous combustion in the workings of what was originally Hemsworth Colliery, but since July 1967 is now part of South Kirby Colliery. Examination is made of the Ba
May 23, 1905
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Discussion of Mr. John Gibson's paper on 'The logic of trams'
Discussion at the North of England Institute of Mining and Mechanical Engineers' general meeting held in Newcastle-upon-Tyne, 8th April 1916, on the paper published in Trans. I.Min.E., vol.LI, 1916, p
Dec 1, 1916
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The Prevention of Spontaneous Combustion in the South Durham Area
By W. R. Donaghue, R. L. Robinson, C. Scott
Whilst spontaneous combustion has never been considered a major problem in south Durham, certain collieries in the area have a history of heatings and precautions are essential. Three collieries are a
May 23, 1905
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The government Miners' Training Schools (incorporated in the Union of South Africa): an outline of two vocational training schemes
By E. J. Bolitho
"The paper covers the activities of the Government Miners' Training-Schools. It argues that its success is proved by the steady demand for miners trained at the Schools; by the large numbers of ex-app
Jan 1, 1947
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Image analysis technique for rock fracture pattern studies around longwall excavations
By D. J. Reddish, B. N. Whittaker, G. X. Sun
An image analysis technique has been used in the assessment of subsurface fracture levels in the context of water inflow into longwall mine workings. The technique was used to analyse results from phy
Jan 12, 1992
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Industrial news August 1997
By NA NA
Listing safety award winners, £I43M has been added to proceeds from coal privatisation in the year to March 1997, bringing total revenues to over £1.3bn, some company news in brief.
Jan 8, 1997
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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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Blast performance management
By J A. Hacked
This paper explores the potential to exploit controls over the outputs of the primary blasting operation, arising from the performance consistency benefits gained in using modern bulk emulsion explosi
Jan 12, 1997
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Mine climate control, both present and future, for high production force in state temperature exceeding 40°C; a case study
By P Shead, M A. Tuck
Both climate and methane control have been a prime concern in the development of the workings within the Deep Soft seam at Harworth Colliery. This paper describes the numerous methods employed over th
Jan 7, 1997
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Ore mineralogy, textures and trace-element distributions at Raibl carbonate-hosted lead-zinc deposit, Tarvisio, Italy, with reference to treatment
By L Casari
A study of samples from three sectors of the mine, which was worked from Roman times to 1991, revealed different textures, mineral associations and distributions of trace elements in the sulphides. In
Jun 18, 1905
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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