Untitled record

Application filed January 24,1894. Serial No. 497,949. (No model.)

To all whom it may concern:

Be it known that I, John B. Waring, of the city, county, and State of New York, have invented a certain new and useful Improve5 ment in Ore-Concentrators, of which the following is a specification.

I will describe a machine embodying my improvement and then point out the novel features in the claims.

io In the accompanying drawings, Figure 1 is a central vertical section of an ore-concentrator embodying my improvement. Fig. 2 is a horizontal section, as indicated by the line 2 2, Fig. 1.

Similar letters of reference designate corresponding parts in both the figures.

A designates a concentrating-chamber of circular form and having, as here shown, a cylindric lower portion cd, which is open at 2o both ends, an acutely or abruptly flaring portion cd extending from the upper end of the cylindric portion cd and a less acutely-flaring portion cd surmounting the acutely-flaring portion cd. The upper end of the chamber is 25 entirely open. The lower part, cd, of the acutely-flaring portion cd may be perfectly smooth on its upper surfaces, as shown in Fig. 1, but the upper part, a⁵, of the acutelyflaring portion cd is provided on its upper 30 surfaces with circular grooves or riffles a⁶.

In the interior of the less acutely-flaring portion cd are a number of comparatively deep grooves cd. The grooves or riffles cd preferably have flat bottoms cd, very slightly in35 dined downwardly toward the center of the chamber, and sides or backs a⁹ extended at right angles to the bottoms aS and consequently inclined upwardly toward the center of the chamber. This shape I deem advan40 tageous.

The grooves cd are shown as having their bottoms a¹⁰ extended at quite a sharp angle downwardly toward the center of the chamber. This feature is important. The sides 45 or backs a¹¹ of these grooves will preferably be rounded. The tops may be horizontal or slightly inclined downwardly toward the center of the chamber and the front edges a¹² of the ribs separating the grooves maybe verti50 cal or otherwise.

The chamber A is provided with a central tubular hub a¹³, which is fitted to an upright shaft B that may be sustained in bearings in any suitable manner. This shaft is represented as being shouldered above the hub a¹³ 55 and as having a nut applied to it below said hub. Between the hub a¹³ and the cylindric lower portion, cd, of the chamber A horizontal arms a¹⁵ extend, and these form the. connection between the hub and the chamber. 60 Preferably .their upper surfaces will be inclined so as to shed material falling upon them. Obviously the space between the hub and the cylindric lower portion of the chamber will be annular except where it is trav- 65 ersed by these arms. The upper surface, cd⁶, of the chamber is inclined downwardly toward the center of the chamber.

The upper part of the chamber A is surrounded by a stationary shell or deflector C, 70 which may be supported in any suitable manner and on the upper end extends inwardly a slight distance above the outer portion of the top surface, cd⁶, of the chamber A.

Below the shell or deflector C is another 75 shell C', and below this shell C' is a chamber or box D having an inclined gutter cl and a door cl‘ on the front, the latter preferably being removable to facilitate cleaning out the box. 80

Below the lower cylindric portion, a', of the chamber A is a shell E, which is fixed in an opening formed in the bottom of the box D. Beneath this opening is a chute F for the purpose of carrying away concentrates dis- 85 charged from the chamber.

The chamber A is caused to rotate at a high velocity by imparting rotary motion to its supporting-shaft. Pulverized ore or pulp is introduced into the chamber by a chute G, 9 c (indicated by dotted lines,) so that it will fall upon the lower part, a⁴, of the acutely-inclined portion a’ of the chamber. The high speed of the chamber causes the pulp to spread out equally in a film over this part of the chain- 95 ber, and instantly it travels outwardly and up over the riffles a⁶ to the grooves cd. In passing over the riffles the effect of change of position of the particles is to permit the heavier to move toward and hug the inner surface of 100 the chamber. The material passes upward beyond the riffles, the heavier, .still hugging the surface of the chamber, being caused to move upward and outward. The inclined

556,567 bottoms of the grooves a⁷ facilitate the heavier^- particles remaining in contact with the chamber and enable them by accumulation in the grooves ri to displace the lighter par5 tides. The lighter particles, with the water which is used in concentrating, pass to the top of the chamber and over the inclined surface a^1G to the deflector C, whence they pass to the box D and are discharged.

i o The course of the material within the chamber A is indicated by dotting in Fig. 1.

After the grooves ri have become overcharged with concentrates the operation may be stopped, and then the concentrates may 15 be washed out of the grooves by means of a stream of water escaping from a pipe, directed by the attendant. When thus removed, they pass downwardly through the chamber on the chute F to any suitable receptacle.