By E. J. Pryor A.R.S.M., D.SC, D.I.C., M.I.M.M. (auth.)
textbook. easy description is tried, and the bibliography has been in particular selected to steer the reader towards a fuller therapy of his detailed ised pursuits. No totally passable time period has but emerged to explain the processing of minerals, that's also referred to as "ore dressing", "mineral dressing", "mineral engineering" and, within the collage of London measure path "mineral technology". The dressing of ores was once a great description of the older procedures which aimed to collapse rock to acceptable sizes, grade it, and separate the heavy fraction from the sunshine one in every one grade or measurement by way of gravity tools. The paintings performed within the mill this present day is going a long way past those uncomplicated operations, and calls for a few wisdom of actual chemistry, fairly the branches which take care of the physics and chemistry of surfaces and of the interphase among stable particle and the encircling liquid. whilst, the engineer mustn't ever turn into so absorbed within the research of primary and utilized expertise as a physico-chemical technological know-how that he overlooks the mechanical, monetary, and humanistic elements oli his paintings. he's an engineer, a chemist, a physicist, and an administrator and, as such, must have a legitimate scientifj. c and cultural schooling. Technically, his paintings is to extract the dear minerals from the ore despatched to his mill; economically, it really is to stability the entire monetary bills and returns in the sort of method as to make sure the utmost benefit from the operation.
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Extra resources for Mineral Processing
F.... qJ ..... ~. :. ~ Mineral Processing-Acceptance into the Mill 27 ore-dressing methods; a specific ingredient of the ore which, for some reason, is not provided for in the concentrating section of the plant; or such mining detritus as timber, iron, and unexploded dynamite which might damage the plant or interfere with the concentrating processes. In the sorting of coal this hand picking was once the main treatment used to grade, to size, and to remove pyrite, slate, and shale. Sorting alters the assay grade by producing a richer and a poorer product and is to that extent a concentrating operation.
The problem of the entry of an uncrushable body, such as tramp iron, is solved in one type by carrying the 48 Mineral Processing-Primary Crushing I I I I I I I I I I I h Eccentric Sleeve ~ L Fig. 14. II) Gyratory Crusher. Diagram spindle on a hydraulically held mounting. If the machine becomes overloaded a valve opens, and the hydraulic fluid is released. The spindle then drops and the obstruction falls clear. With this machine, as with the Blake, an overload device can be used to trip the driving motor.
The spindle then drops and the obstruction falls clear. With this machine, as with the Blake, an overload device can be used to trip the driving motor. The set is determined by the maximum opening at the discharge end, and this is either fixed by vertical adjustment of the spindle on its suspending nut or by hydraulic lift. Unlike the reciprocating jaw crusher, the gyratory works whole-circle, and thus runs more smoothly and with greater capacity. , with a vertical Mineral Processing-Primary Crushing Fig.
Mineral Processing by E. J. Pryor A.R.S.M., D.SC, D.I.C., M.I.M.M. (auth.)