US1056519A - Concentrating-table. - Google Patents

Description

G. H. BLMORB.

GONGENTRATING TABLE. APPLIGATION FILED 00T. 29, l1910.

`Patented Mar. 18,1913.

2 SHEETS-'SHEET l.

G. H. BLMORE. CONGENTRATING TABLE.

APPLICATION FILED 0GT.29, 1910.

Patented Mar.18,1913.

2 SHEETS-SHEET 2.

i r,o5e,519.

( i-UY HVELMOE, 0F SWARTI-IIVIORE, PENNSYLVANIA.

CONCENTRATING-TABLE.

Specification of Letters Patent.

Patented Mar. 18, 1913.

Application led October 29, 191.0.v Serial No. 589,743.

To all inkom t may` concern Be it known that I, GUY H. ELMORE, a

citizen of the United States, residing at Swarthmore, in the county of .Delaware and State of Pennsylvania, have invented cerf,

tain new-and useful Improvements in Concentrating-Tables, of which the following is a specification. V

This invention pertains to concentrating tables, which in the more general features,

mounting, drive, etc., may be 'of usual orapproved construction, the object of the apparatus about to be described being to increase very greatly the capacity of the table, though at the expense of the completeness or closeness of separation. In other words, the purpose is to produce what might prop.-

erly be called .a roughing concentrating table, designed to veffect a preliminary concentration or separation, leaving the final and closer separation to be effected. on a second or ordinary table. Under-this plan of construction and operation, the capacity of the roughingconcentrating table will be,` approximately, from six to ten times that of lthe ordinary table, and the conc'en tration. or separation will be such that the concentrates of several ofthe roughing tables may be handled on a single ordinary table.

The present invention is designed primarily kwith reference to the handling of coal in a finely crushed or pulverized cond-ition, and for removing the refuse and fine .sulfur therefrom, and for use with low grade ores having a large proportion of tailings to concentrates. In the case of coal the purpose is to make a clean product, with a concentrate of refuse carrying some coal, and in the case of ore', to produce a clean tailings prod uct and a concentrate carrying some tailings,relying, as above explained, u on the subsequent treatment upon an ordlnary table to complete the concentration and separation.

The accompanying drawings illustrate my invention in a preferred form.

Figure 1 is a top plan view of the table; Fig. 2, a longitudinal vertical section on the line 2-2 of Fig. l; Fig. 3, a transverse section on the line 3-3 of Figs. 1 and 2, looking to the left; Fig. 4, a section on the line 4 4 of Figs. 1 and 2, looking to the left; Fig. 5, a section on the line 5 5 of Figs. 1 and 2, looking to the right; Fig. 6, a view showing the ritiles decreasing in depth at one end; Fig. 7, a view showing the rililes of unequal length; Fig. 8, a top plan-View of a portion of one of the ritlles, and showing the form or outline of the dislchargefopening; Fig. 9, a top plan View of one of the outlet tubes or pipes; and Fig.

10, a vertical sectional Viewy of thesame.

Referring -to said drawings, A indicates the bed or tablev proper, which is ordinarily made of wood, Abut may be of any suitable material, provided with longitudinal 'riflles B, preferably of the form indicated in Figs. 3 and 4'. Onreferring to said figures it will-be noted that from thev receiving orv vhigh side of the table each rifile' B has a beveled or slanting upper side a, an' upright wall b on the lower or discharge side, and a shallow. smaller trough or channel c between the vertical and the oblique orv inclined walls, said channel being provided' with holes or. outlets, as hereinafter described. In the preferred form these rifes B run the entire length ofthe table, and are of uniform depth throughout the length of the feed box orslightly more, this being the point at which the last row of holes transverse of the length of the table is located. From this point they grow progressively shallower to the end of the table, as in Fig. 6. They` may also grow progressively longer as in Fig.V 7, and as is now some times done in other tables. The final row of 4holes or outlets should be parallelwith the end of the table, 'orap'proximately so.

At suitable intervals in the length of the table are formed holes or outlets d, as above. indicated, 'opening from the lowest point of theritlie, groove or depression o through to theunder side of the-table, and in order to maintain these outlets of proper form and on the pipe and into the bottom of the table.

This is best. shown in Fig. 10.

To guard againstthe clogging of the outlet nozzles e, the hole or passage through .them is made of materially increasing d1'- mensions in cross section from the upper toward the lower end, as indicated in Figs. 3 and 10, and further to insure clearance, the openings increase in width in the direction of flow of the water along the channels r', being narrowest atthe uppei or receiving side and Widest toward the delivery side, as indicated in Fig. 9, wherethe arrow shows t-he direction of flow of the water` across the upper end or mouth of one of the nozzles.

`The several launders C, which are arranged Amounted upon a shaft Gr and acting against a roller f carried or journaled in the forked end of a rodh H, guided in ways and attached to one end of the table, a return springI being employed to maintain the roller in contact with the cam. The table is provided' with metallic bearing blocks J, which slide upon guide rods K carried in rocking beams or hangers L, pivotally mounted upon supporting standards M carried by a base frame N of any suitable construction.

In order'to tip the table to any desired' degree to determine the rapidity of flow of Water and coal, pulp or stock across its face,

there is provided a toggle support composed of two links g and l1., connected at their inner ends to an intermediate sleeve block z', and at theiro-uter'ends, respectively, to a lug on the base frame N and to acollar y' on one of the rods K. A screw c is swiveled in the sleeve block z', and'passes through a nutl 'Z pivoted in lugs or ears m on the base frame N,l the opposite end of the screw being provided with a hand-wheel 7i by which it may be readily turned to straighten or to bow the toggle, as desired. The mounting de# vices and actuating mechanism of the table constitute no part of the present invention, andare described merely for the purpose vof setting forth a complete machine.

It is customary with concentrating tables generally to incline the table both longitudinally and transversely, andthat may be vdone in the present instance if deemed desirable, but I consider it sufficient ordinarily to incline the table transversely, as 'indicated in Figs. 2, 3, 4` and 5, provided the table be given a quick return movement toward the feed end, so that there shall be a regular progression or advance of the heavy concentrates which lodge in the longitudinal riiiles or channels. Where, as is frequently the case, the movement is alike in both directions, the table is, of course, made slightly lower at its discharge end than at the feed end. It is also usual to deliver the water and coal, pulp or other mineral substance, to the 'table at one end or corner only, the longitudinal inclination tending to distribute the material over the entire length of the table. Under the present plan, however, the supply launder is extended nearly the full length of the table and delivers thereto substantially from end to end,

the flow across the table being perpendicularl to its length and hence the same at y all points. The longitudinal reciprocation of' holes, which row or series of holes advisably is parallel with the end of the table, or in other words, they are progressively shallower from the last hole in each, to the end of the rillle. This construction tends to lessen the quantity of tailings working out to the end of the riiie, and to bring the ore to the surface of the table,- so that they will be washed over the lower edge of` the table. This slow and gradual movement is suiicient to cause the fine and heavy material, which settles in the depressions c of the riflies, to Work longitudinally along said depressions until the outlets d are reached, and in this way the constant discharge of such fine and heavy material through the pipes or nozzles! e is insured.

The travel of the water and coal, pulp or o re, as the case may be, transversely ot' the table is so rapid, relatively, that no considerable longitudinal travel thereof is caused, and the material moves across the table practically at right angles thereto.

As stated above, this table is designed more especially for handling finely pulverized coal or low grade ores. Much of the coal is found to contain sulfur, which lies in thin films or layers between layers of coal, and it is only by finely pulverizlng the coal and separatlng the layers so as to expose the sulfur, that it can be removed and washed off. lBy making the riliies of the peculiar form here shown and described, the sulfur, which is heavy, finds its way into the depressions c, and thence through the outlet pipes or nozzles e into the launders by which 1t is carried oli' to a suitable receptacle for more perfect separation and recovery.

Any form of riile which produces arelatively narrow channel for the vheavy materials or concentrates, at its lowest polnt, will serve the purpose.

By reason of the outlets d, e, at intervals, in practice usually about five feet, the table is in effect divided up into a series of relatively short decks, and the concentratesor heavier particles, instead of being required to travel the entire length of the table, or to be Washed over its lower edge in order to escape,vhave only to traverse a rilile until the nearest outletdis reached whereupon it is permitted to escape. This greatly facilitates the separation of the concentrates, and is the 'clined concentrating table having longitudinal riflles provided at intervals with discharge openings through their bottoms for escape of fine and heavy concentrates; means for reciprocating said table longitudinally and effecting a progressive travel of con.- centrates within the ritles from the feeding end toward the tail or discharge end of the table; and' a feeding launder extending along the upper side of the table throughout sub-4 stantially the whole length thereof.

2. In combination with a transversely inclined concentrating table, having a series of longitudinal riflles decreasing from full depth at a point near the tail end ofthe table to zero at said end, and provided With dischargev openings at intervals through their bottoms; a feeding launder extending along the upper side of the table throughout substantially the Whole length thereof; and

means for effecting longitudinal reciprocation ofthe table, and eecting a progressive movement of concentrates in the ritlies toward the discharge end of the table.

3. In combination with a concentrating table provided with longitudinal riliies having outlets through their bottoms spaced apart suitable distances, the transverse rows of outlets dividing the table into a series of decks or sections each having its outlets for concentrates; means for effecting a longitudinal reciprocation of the table, and effecting a' progressive movement of concentrates lodging in the riflies, from the power or driving end of the table toward the Adelivery end thereof; and a feeding launder extending throughout substantially the whole length of the table, and adapted to deliver material thereto throughout substantially its full length, said tablel being transversely in- Aclined to cause aflow of the mass of mate rial fed, crosswise of the table.

4. In combination with a concentrating table provided with longitudinal riftles, and divided into sections or decks by transverse rows or series of outlets opening through the bottoms of the ritlles for the escape of concentrates; means for longitudinally reciprocating the table, and thereby eecting a progression of concentrates deposited in the riles toward the delivery ends of said rilfles; and a feeding launder extending substantially the full length of the table, and delivering material thereto throughout practically the whole length of the table, said table being inclined downward transversely from the feeding launder toward the dis` charge side of the table.

In witness whereof, I have signed my nameto this specification in the presence of two subscribing Witnesses. L

GUY H. ELMORE.

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