US250056A - Centrifugal ore-concentrator - Google Patents

Description

(No Model.)

A. D. CLARKE.

2 Sheets--Sheet l CENTRIFUGAL ORE GONUENTRATOR.

Patented Nov. 29,1881.

5m A. n

V UNITED STATES PATENT @FEIQE.

ALEXANDER D. CLARKE, OF OMAHA, NEBRASKA.

CENTRIFUGAL ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 250,056, dated November 29, 1881.

Application filed September 24, 1881. (No model.)

To all whom it may concern:

Be it known that I, ALEXANDER D. CLARKE, of Omaha, Douglas county, State of Nebraska, have invented certain new and useful Improvements in Centrifugal Ore-Concentrators, of which the following is a specification.

This invention, which relates to centrifugal ore-concentrators, consists in the novel construction of such concentrators hereinafter set forth. The apparatus is intended more especially for use in connection with amalgamating devices, such as are shown in a previous application filed by me on the 19th day of July, A. D. 1881; but it may be used with almost any description of amalgamator.

The annexed drawings, forming part of this description, show at Figure l a central vertical section of my invention, and at Figs. 2 and 3 a plan and edge view, respectively, of one of the centrifugal concentrating-wheels.

Referring to said drawings, A represents the shaft whereon the centrifugal concentratingwheels are mounted and whereby they are rotated. The upper wheel, B, receives the ore or mineral carrying earth or sand from above, and by means ofits rotation, aided by the radial projections I) upon its surface, itthrows the same upon the stationary surrounding inclined amalgam-plates (J, resting upon the shell 0, which in turn is supported by the exterior shell, D. Said inner shell, 0, has a gutter, c, at its inner lower edge, which collects mercury nototherwise saved. The lighter and unamalgamated particles of earth or ore will, by reason of the centrifugal force given them, ride over the plates 6 into the annular space at between the shells G and D, and following the surface of the latter downward fall from thence at the center into the next concentrating-wheel below. This second concentrating-wheel, E, in addition to like projections, b, is provided with a dished covering, E, extending from the periphery inward toward but not to the center, leaving the inner ends of said projections 11 exposed, so that the material falling from the upper wheel is readily taken hold of and scattered by said projections. Upon this dished covering-plate are two concentric conic frustums, e 0, one within the other, so that a passage or annular opening, 0, is formed between them. Into this passage 0 the-accumulations of the gutter c in the upper shell, 0, are conducted by the pipe 0, and from it they are driven into concentric collecting -tubes F, mounted upon the wheel E, and provided each with an opening from said passage. These tubes are closed at one end, and the other end fits upon short connecting-tubes f, (indicated by the dotted lines in Fig. 2,) and extending through the wall of the passage 0. To render the tubes removable they are secured by keepers f and bolts, as shown, or in some equivalent way. The rotation of the wheel tends to force all the drippings received in the passage through the short pipes f into the collectors F. In order that the wheel may be balanced, I prefer to use three or more of these tubes. Said lower wheel is also surrounded by like plates, 0, supported bya like shell, 0, which in turn rests upon a like outer shell, D, and there is a like channel, m, between said shells. The action of this wheel is, so far as such of the material as falls upon its center is concerned, similar to the first wheel. A spout, G, leads the finer particles from the outer shell into any proper receptacle, and a suitable pipe may also lead from the gutter of the lower shell, 0, if it is found that any considerable amount of mercury collects there.

J represents the supports by which the surrounding casings are upheld.

Very perfect results will attend the use of the two concentrators shown; but more may be employed, if des red;

I claim 1. The combination of two or more centrifugal concentrators, one or more of which are provided with mercury collecting devices borne thereon, substantially as specified.

2. The combination, with a centrifugal concentrator, of the collecting'tubes carried thereon, substantially as specified.

The combination of the upper centrifugal concentrator, the surrounding inclined plates,

the gutter at the foot of said plates, the con- 5 ductor for conducting the mercury deposits to the lower concentrator, and said lower concentrator having the annular passages and collecting-tubes opening from said passage, sub stantially as set forth.

IOO

4. The combination of an upper concentracury-collecting devices mounted upon it and tor, supplied with an inner surrounding 1nhke inclined surrounding surfaces, substanclined surface for collecting the mercury detially as specified.

posits, and provided with a pipe for conduct- ALEXANDER I). CLARKE. 5 ing such deposits to the lower concentrator, Witnesses:

and. an outer inclined surface, open at the cen- ANDREW S. VAN KURAN,

ter, and said lower concentrator having mer- GEO. WV. HALL.

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