An Investigation of the Possibilities of Applying the Flotation Process to the Treatment of Fine Sands and Slimes Formed in Milling in the Southwest Wisconsin Zinc District

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University of Wisconsin--Madison, 1922 - Flotation - 92 pages
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Page 18 - The ultimate speed of the agitator will depend somewhat upon the character of this froth, as some oils will give a deep persistent froth, while other froths are thin and brittle and allow of more water being added to the machine, as well as more violent agitation in order to beat more air into the pulp. The froth may either be allowed to flow out of the spitzkasten of its own weight or skimmed with a small wooden paddle. It is a good idea to wet the glass sides of the 'spitz' with water while the...
Page 11 - Canada, where spruce, fir and pine are the principal pulp species, it has been estimated that about 10 to 15 per cent of the total log volume is made up of bark.
Page 17 - ... of the sulphide particles. The excess bubbles which never go through the solution stage, in this, as in the other pulp-body-concentration processes, in part coalesce with the bubbles already formed on sulphide surfaces; in part pass with the pulp into the froth-separating chamber and there, rising, add buoyancy to the froth and serve to pick up particles dropped by the bursting of other bubbles; in large part, however, they rise to the surface of the pulp in the agitating compartment and are...
Page 16 - The agitation-froth process depends upon local supersaturation of the water of a pulp with air by the mechanical action of a swiftly revolving beater, and the simultaneous precipitation of air in the form of bubbles, preferentially on the surface of the particles of metalliferous mineral, to effect the same result effected in the previously mentioned processes of the pulp-body-concentration type.
Page 15 - The machine is covered with a hemispherical cover with a hole in the top. The base of the casting forming the agitating compartment is flanged and sits upon a frame. Agitation is effected by means of two four-armed impellers placed one near the bottom and one near the top of the agitating compartment. These impellers are carried on a vertical spindle which passes through a stuffing JANNEY MACHINE //7.
Page 9 - Flotation, as the term is applied to ore concentration, means the separation of one of the constituents of an ore from the remainder by causing it to float at or above the surface of a pulp consisting of the finely pulverized ore and water.
Page 9 - Flotation methods ~~~ — — - - ^ may be classified on various bases, but one classification, dividing them into three varieties on the basis of the force that acts to buoy the mineral of metallic luster, is probably worth mentioning. It la as follows: Taggart, AF, A Manual of Flotation Processes, 1st Edition, 1921, pl, Callow, JM , Notes on Flotation: American Institute of Mining Engineers — Transaction
Page 17 - This pulp is at a reduced pressure due to the forward motion of the blade and the inertia of the pulp mass. Here, air comes out of solution in the form of bubbles at the surface of the sulphide particles.
Page 17 - These minute bubbles are in a favorable state to be taken into solution; and many of them are, at the time of...

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