Search Documents
Search Again
Search Again
Refine Search
Refine Search
-
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
-
Aluminium-lithium aerospace alloys: a new challenge for recycling
By D. J. Allan, W. R. Wilson
For conventional aerospace aluminium alloys of the 2000 (copper) and 7000 (zinc, magnesium) series the recycling of process scrap from both metal suppliers and aircraft manufacturers is a well-establi
Jan 4, 1993
-
The influence of incombustible substances on coal-dust explosions
The paper, presented at the North of England Institute of Mining and Mechanical Engineers' general meeting held in Newcastle-upon-Tyne, 8th April 1916, presents experimental work undertaken to observe
Dec 1, 1916
-
A glimpse of the future
By P Cochrane
Our ability to generate information and transport it about the planet on super highways of optical fibre is about to change the way in which we communicate, work and live. There is not a single aspect
Jan 7, 1996
-
High-speed air-compressors for mining work, paper presented at a general meeting of the North Staffordshire Institute of Mining and Mechanical Engineers held in Stoke-on-Trent, 17 January 2016
By Walshe J. M.
The slow-speed compressor is giving place to the high-speed type, with its greater economy of material and space; and, where very large units are required, the turbo-compressor is supplying the need.
Dec 1, 1916
-
Petrography and paragenesis of platinum-group minerals in Jinchuan ultramafic intrusion, northwest China
By Li Shibo, C. Halls
The compositions of olivine, pyroxene and chromite from the Proterozoic ultramafic complex are analagous to those of cumulate ultramafic rocks of tholeiitic origin, suggesting that the parent magma ma
Jan 12, 1993
-
Experience with Spontaneous Combustion in the Coalfields of North Staffordshire
By D. C. Yates, G. V. Jolliffe
In the five coalfields of Staffordshire, there have been some 43 incidents of spontaneous fires and heatings which have required special attention in the past ten years. This total excludes incidents
May 23, 1905
-
Review of mine ventilation system optimization
The following procedure was used to determine cut-off grades: define the orebody profile; plan the stope layout and quantify the work involved; formulate equipment-performance norms; calculate unit co
Jul 1, 1996
-
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
-
Platinum- and palladium-bearing minerals in serpentinites from southwestern Blue Mountain area, Jamaica
By A. C. Dunham, Y. D. Drakapoulos, P. W. Scott
The Pt and Pd occur alloyed with copper in small, irregularly-shaped grains, 0.25-5.0 micrometers in maximum dimensions. Grains of unalloyed native copper are also present. The grains are completely s
Jun 14, 1905
-
Origin of lower eocene gypsum-anhydrite rocks, southeast St. Andrew, Jamaica
By D. W. Holliday
The major deposits of anhydrite and secondary gypsum in Jamaica occur discontinuously at a single horizon within the Lower Eocene succession of southeast Jamaica. They are not intruded from other hori
Dec 1, 1971
-
New biological treatment plant for heavy metal-contaminated groundwater
By L. J. Barnes, R. O. Koch, J. H. Versteegh, C. J. N. Buisman, P. J. H. Scheeren
Several water treatment options have been studied and piloted. A process based on activity of sulphate reducing bacteria combines sulphate removal and heavy metal removal in one process step. The anae
Jan 12, 1992
-
Thermodynamics study of oxygen in liquid lead-tin alloys
By J. H. E. Jeffes, K. T. Jacob
The activity coefficients of oxygen in liquid Pb-Sn alloys have been measured between 550 and 1100°C by use of solid oxide galvanic cells: Pt, Ni-NiO | Zr02 Solid electrolyte | O (Pb + Sn), Cermet, Pt
Dec 1, 1971
-
Mineral exploration practice in Ireland
By R. W. Schultz
Mineral exploration carried out in Ireland since the mid-1950s has resulted in the discovery of ore deposits that are now in production atTynagh (Pb-Zn-Cu-Ag), Silvermines (Zn-Pb) and nearby Ballynoe
Dec 1, 1971
-
Efficiency in batch separations
By A. B. Holland-Batt
Two graphical techniques which are commonly used to assess batch separations are analysed in terms of reaction kinetics to provide a more powerful method of evaluation. An alternative and more general
Dec 1, 1971
-
Cu-Ni-PGE mineralization in the marginal series of the Early Proterozoic Koillismaa layered igneous complex, northeast Finland
By T. Piirainen, T. Alapieti
"The Koillismaa layered igneous complex is the result of igneous activity that occurred 2436±5 m.y. ago. Its crystallization took place in three separate but connected magma chambers, the total volum
Jan 1, 1984
-
The estimation of moisture in coal
By Winmill T. F.
(Paper presented at the Institution of Mining Engineers' general meeting held in London on 8th June 1916.) The conclusions reached in this paper may be summarized briefly as follows: (1) The method of
Dec 1, 1916
-
The absorption of oxygen by coal, part VIII: the effect on the absorption of the size of the coal-particles and the percentage of oxygen in the air
By Winmill T. F.
Paper presented at the at the Institution of Mining Engineers' general meeting held in London on 8th June 1916: In a previous paper it has been shown that the rate of absorption of oxygen by coal is n
Dec 1, 1916
-
Copper Losses in Smelting and Converting
By R. W. Ruddle
The present state of knowledge on this subject may briefly be summarized as follows: (1) The copper content of the slag increases with the grade of the matte in contact with it; on the other hand, the
Jan 1, 1953
-
Discussions and contributions: Geology and evaluation of placer gold deposits in the Klondike area, Yukon Territory
By B. W. Hester
Report of discussion at January, 1971, general meeting (Chairman: M. J. Cahalan, President) of the paper published in Transactions/Section B (Applied Earth Science), vol. 79, May, 1970, pp. B60-B67, a
Dec 1, 1971