US1151448A - Fine coal and ore separator. - Google Patents

Description

L M. DRAPER.

FINE COAL AND ORE SEPARATOR.

APPLICATION FILED mm, 1914.

Patented A115. 24, 1915.

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COLUMBIA PLANDGRAPH co.,\vAsl-11NGT0N, n. c.

Patented Aug. 24, 1915.

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J. M. DRAPER.

FINE COAL AND ORE SEPARATOR- APPLICATION FILED APR. 4. 1914.

1,151,448. Patented Aug. 24, 1915.

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JOHN MARRIOTT DRAPER, F MANCHESTER, ENG-LAND.

TINECOAL AND ORE SEPABATOB.

Application filed April 4, 1914. Serial No. 829,581.

To all whom it may concern Be it known that I, J 011x MARRIOTT Dnarnn, a citizen of the United States of America, residing at Curzon Buildings, 38 King street west, Manchester, England, have invented new and useful Improvements in Fine Coal and Ore Separators, of which the following is a specification.

This invention relates to an improved con-- struction of apparatus for separating fine from coarse materials such as is employed in the treatment of coal and ores which are subjected to the pulsating action of a liquid produced through the perforated bottom of a separator box to one end of which such material is supplied, and "along which bottom it travels and is delivered at the opposite end of the box, the Water removing the fine portions therefrom in its passage through the perforations.

The movement of the water through the perforated bottom of the separator box will be produced in the known manner either by a plunger acting on a portion of the surface of the liquid or by imparting a jigging I motion to'the separator box inthe liquid in fee which same is immersed.

The fine material removed by the suction action of the water in its downward passage through the perforated bottom of the separator box will consist of an admixture of fine dirt and finely divided particles of the material being treated, which latter it is the object of the present invention to separate and to recover. h

A suitablemanner of carrying my inven- 3 tion into eifect is illustrated in the accompanying drawings as applied to a coalseparater-or washer, in'which a gigg ng move 'ment is imparted "to'thebox inwhich the material is treated. I i

In these drawings Figure 1' is a longitudinal section of the improved separator or end of the box as it passes under gate I and Specification of Letters Eatent. Pat erned Aug, 24, 1915,

travels along to the point of delivery over the sill O at the front end of such box,

' causes same to separate by gravity according to density.

The bottom H of box B is preferably inclined toward the point of delivery as shown in order to facilitate the travel of the mate rial over same.

Beneath the primary perforated bottom H the box B is formed with a secondary perforated bottom J with an intervening space K constituting a chamber on the fioor of which a layer of stone chips is spread to a depth of 2 or 3 inches, but with sufficient clearance above the top to enable the chips to rise and fall under the action of the water in its passage through the secondary bottom J and exercise a controlling valvular action over the perforations therein.

The perforations of the secondary bottom J will be larger than those of the primary bottom H.

As the primary bottom H of box B is preferably inclined, while the secondary bottom J has to occupy a horizontal position, in order that too great a depth may not have to be allowed over the chips at the inner end, such secondary bottom J may be formedon two or more levels or planes constitutingsteps as shown.

On the downward stroke of the box or' pan 13 water enters first through the perforations of secondary bottom J and passing up through the stone layer and thence through the finer perforations of the primary bottom H, effects the separation of I the material contained in the box or pan according to the relative specific gravities thereof.

on the upward stroke a strong suction action will take place, which first operating through the large lower perforations of the secondary bottom J has the result of drawing the stone chips over such perforations so as topractically close same.

This suction action also obtains through the smaller perforations of the primary bottom H, whereby part of the fine material is drawn through into the intermediate chamber K between bottoms H and J. Owing to the earlier closing'of the perforations in i the secondary bottom J the downward suction action experiences a check'between the two bottoms H and J, whereby the heavier particles only of the fines are allowed to settle or pass downward through bottom J into the tank below, the lighter material remaining in suspension between the two bottoms and passing along toward the delivery end being thuslargely removed as the material passes along the separator box B forward, a point is reached where the product passing through the secondary bottom is wholly or mainly light fines or coal, which'is caused to pass to a separate chuteand can be conveyed back to the box B for rewashing if.

desired or forwarded direct to washed coal delivery. For this purpose the feed end of the box B is situated over the chute l formed in tank A and which delivers int'o the elevator arranged on the left hand side of the machine (Fig; 3), and which disposes of the heavy finespassing out through such end of the secondary bottom J, while the remaining or forward portion of bottom J is situated over a chute 2,.for'med in said tank A and which receives the light fines or coal passing throughsaid bottom and delivers it to anelevator on the righthand' side of the machine (Fig. 3), which" either delivers it from the machine or raisesjit to a chute 5 which conveys it backto box B for rewashing if desired. I

In order to determine the point of separation of delivery of the heavy andthe light fines into their respective chutes 1 and 2 an adjustable gate or deflector E is pivoted on a fixed division board'M and throughrod I N and a crank connection can be adjusted so as to divert the material passing through the bottom of box B to one side or other, and

' consequently determine accurately the point where the delivery to chute 2 is tostart;

, i When the material to be treated contains only a small proportion of fines which are liable to be removed through the perforated bottom of box B, but from whichit is desirableto recover a valuable portion, only a portion of the width of such box'need be fitted with a secondary perforated bottom, the remaining 'portion having a single or primary perforated bottom only; Such a construction is represented in the plan, shown in Fig.5 of-thedrawings, where the box 13 is divided by a longitudinal partition X, the material to be treated being delivered to the compartment Y ofthe box on one side of such partition, which is provided with materials either in the direction of thedethe usual or primary perforated bottom only, the whole of'the fines passing through which single bottom are conveyed back and delivered to the compartment Z on the other side of partition X,which isprovided with both til-primary and a secondary perforated bottom which ,eifect the separation of the heavy and the lighter fines in thevmanner hereinbefore described. p

In order to effect the supply of stone chips to the chamber Kbetween the primary and secondary perforated bottoms'H and J of box B, pockets G are provided preferably. at the opposite ends of the box as shown, and which are open at top and at'bottom open into such chamber K, so that a suitable supply of chips dropped into such pockets will under the jigging action of the box in the water beimmediately distributed ina layer ofuniform depth overthe perforationsof the secondary bottom J on which they rest. A fresh' amount of chips may beintroduced through such pockets from timeto time to replace the loss 0002asioned by abrasion and a rod introducedinto one of such pockets will enable the desired depth of the layer to be readily gaged.

' The primary perforated bottom H; of box f B terminates before'the sill 0 so as 'to leave an opening P, beneath which a cradle C is pivoted,.and is connected by .an arm Rc to a weighted rod 8 The cradleC'is directed toward the feed end of themachine, and the heavy material which passes through open- 1 ing P accumulates thereon until overcoming the weight acting on rod .8, it will cause. cradle C to fall and be dischargedtoward the feed end of the machine into; chute 3, the i bottom of which delivers to the same elevator as that with which the chute 1 of the heavy fines communicates, soithat the same elevatorvserves to deliver boththe heavy fines and the heavy separated material together from the machine.

The light separatedmaterial constituting the upper stratum of the material at the d elivery end 'ofbox B, as-it accumulatessun mounts the upper edge of sill 0 and falls into chute 4: communicating with the elevaw tor occupying the central portion of the ma chine, and bv-lwhich it is delivered from the machine.

through chute l passesfrom the central elevator casing in the direction shown by the arrows .to trough F which conveys it back to tank A at a pointbelow theseparatorbox The water with the separated coal B, thus'establishingthe necessary circulation of thewater and maintaining the level of the liquid in saidtank.

It has already been proposed tofemploy a pivoted part constituting the bottom of the separator box or acting in conjunction therewith and allowing of thedischarge of heavy perforated bottom, a perforated bed-supporting bottom beneath the sameand in proximity thereto, comprising sections longitudinally arranged in stepped relation, the perforations of the first mentioned bottom being smaller than those of the bed support- 7 ing bottom, the first bottom being adapted to initially receive the material to be sepa rated, and means for forcing an intermittent current of fluid through the bottoms.

2. A jig box having an elongated inclined perforated bottom, a perforated bed-supporting bottom beneath the same and in proximity thereto, comprising sections lon-' gitudinally arranged in stepped relation, the

perforations of the first mentioned bottom bei ing smaller than those of the bed supporting bottom, the first bottom being adapted to in-' itially receive the material to be separated, and means forforcing an intermittent current of fluid through the bottom, each step portion of the bed-supporting bottom being provided With an inlet conduit for bed-material located outside the area ofthe first bottoms.

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing Witnesses.

JOHNMARRIOTT DRAPER, Witnesses I R. BEETLEs'roNER,

E. C. ,HETHERINGTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. O.

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