Transactions of the Institution of Mining and Metallurgy, Volume 24E. & F.N. Spon, Limited; The Institution, 1915 |
Autres éditions - Tout afficher
Transactions of the Institution of Mining and Metallurgy, Volume 28 Institution of Mining and Metallurgy (Great Britain) Affichage du livre entier - 1919 |
Transactions of the Institution of Mining and Metallurgy, Volume 33 Institution of Mining and Metallurgy (Great Britain) Affichage du livre entier - 1924 |
Transactions of the Institution of Mining and Metallurgy, Volume 27 Institution of Mining and Metallurgy (Great Britain) Affichage du livre entier - 1918 |
Expressions et termes fréquents
acid alkaline amount anode arsenopyrite assay AuCl average banket beds Bendigo bottom carbon cassiterite cathode Champion Reef charcoal chloride concentrate considerable containing copper cost crushing cyanide cyanide solution deep deposits diabase discussion economic electrolytic energy evidence experience fact favourable feet fissure Frue vanner geological geologist gold graphite greater depth heat igneous rocks important increase industry instance Institution interesting limited lode magma Malcolm Maclaren material metal Metallurgy method mill mineral mining engineer natural gas non-persistence obtained ore-shoots orebodies outcrop oxide paper particles persistence in depth petroleum practice precipitation present pressure profitable pyrites quantity quartz question Rand reef referred regard rich Rickard rock sample sand schist scorodite shaft shallow silver sinking slime specific gravity sulphide surface temperature theory tion Trewartha-James veins vertical yield zone
Fréquemment cités
Page ix - Metallurgy was founded in 1892 for the " advancement of the Science and Practice of Mining in respect of minerals other than coal and of Metallurgy in respect of metals other than iron ; and to afford a means for facilitating' the acquisition and preservation of that knowledge which pertains to the profession of a Mining Engineer and Metallurgist.
Page 493 - Ore which may be reasonably assumed to exist though not actually "blocked out"; these two factors should in all cases be kept distinct, as (<i) is governed by fixed rules, whilst (fol is dependent upon individual judgment and local experience. 3. That in making use of the term
Page 116 - ore in sight ' is frequently used to indicate two separate factors in an estimate, namely : " (a) Ore blocked out — that is, ore exposed on at least three sides within reasonable distance of each other — and...
Page 428 - ... solution of the problem of bad behavior in this case was developed from the assumption that the shaft could not prepare stock for all the work the bosh was doing. At the next relining more shaft working space was provided by putting in a thinner lining above the mantle. Results showed that this was a step in the right direction but did not go far enough. It is planned on next relining to reduce the height of the bosh in an attempt to restore the balance between shaft and bosh. Answers to some...
Page 173 - Under the conditions of pressure and temperature which are believed to obtain within the earth's crust, empty cavities may exist in granite to a depth of at least 11 miles. These may extend to still greater depths and if filled with water, gas, or vapor will certainly do so, owing to the pressure exerted by such fluids or gases upon the inner surfaces of such cavities or fissures.
Page xxx - O thou happy man, that must not die, As these things shall; leaving no more behind But a thin memory, like a passing wind That blows, and is forgotten, ere they are cold. Thy labours shall outlive thee ; and, like gold Stampt for continuance, shall be current, where There is a sun, a people, or a year.
Page 116 - Sight," in their reports, without indicating, in the most explicit manner, the data upon which the estimate is based ; and that it is most desirable that estimates should be illustrated by drawings. 2. That as the term "Ore in Sight...
Page 210 - America, founded in 1906, for the promotion and advancement of scientific and practical knowledge in all matters relating to the...
Page 368 - ... process in operation by the end of June, 1911. A view of the mill and cyanide-plant is given in Fig. 1, and the general plan and sections in Figs. 2 and 3. Character of the Ore. The results of tests made in the experimental plant established the following facts in regard to the character of the ore: (1) Very fine grinding is necessary in order to obtain a good extraction of the silver. Grinding samples of the tailings to pass a 150-mesh screen and other samples of the same material to pass a...
Page 493 - Sight' an engineer should demonstrate that the ore so denominated is capable of being profitably extracted under the working conditions obtaining in the district. 4. That the members of the Institution be urged to protect the best interests of the profession by using their influence in every way possible to prevent and discourage the use of the term 'Ore in Sight...