US1304077A - Dewatering - Google Patents

Description

C. W. McARTHUB.

DEWATERING, CLASSIFYING, AND RABBLING APPARATUS FOR ORE PULP. APPLICATION FILED AUGJB, 19W

1,304,077. Patent/ad May 20, 1919.

2 SHETSSHEET 1.

INVEN TOR.

A TTORNEY.

C. W. McARTHUR.

DEWATERING, CLASSIFYING, AND RABBLINGAPPARATUS FOB ORE PULP.

memos man AUG. 26. 1918 1,304,077. Patented May 20, 1919.

2 SHEETS-SHEET 2.

mm I NVENTOR.

A TTORNEY.

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M6 MIM%%M UNITED STATES PATENT oFFIo CYRUS MQARTHUR, OF DENVER, COLORADO.

pnwn'rnnme, CLASSIFYING, AND RABIBLING APPARATUSFOR ORE-PULP.

To all whom it may concern Be it known that I, CYRUs W. MCARTHUR, a citizen of the United States of America, residing at the city and county of Denver and State of Colorado, have invented a new and useful Dewatering, Classifying, and Babbling Apparatus for Ore-Pulp, of which the following is a specification.

My invention relates to a new and improved dewatering, classifying and rabbling apparatusfor ore pulps, and the objects of myinvention are:

First: To provide a continuous feeding movement dewatering, classifying and rabbling apparatus forore pulp, having a value carrying slimes product,

SecondzTo provide means by which ore pulp maybe .dewateredand its slime product separated and saved and its heavier mineral particles classified. And

Third: To provide a simple, inexpensive and thoroughly practical ore pulp dewatering, classifying and rabbling. apparatus that is inexpensive to construct and that does not require a special foundation for its installation and operation.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which I Figure .1 is a side elevation of an apparatus embodying my invention. Fig. 2 is a plan vew, of. the apparatus; and

Fig. 3 is a vertical, longitudinal, sectional view of the same. 7 7

Similar letters of reference refer to similar parts throughout the several views. I

Referring to the drawings:

The numeral 1, designates a tank which may be constructed of any suitable material. This tank is of rectangular shape and is preferably madeseveral times longer than its width and is-adapted to hold the ore pulp of finely crushed and pulverized ores that contain both slimes and a mineral product. The tank is supported upon cross bars 2, which are secured to uprights 3, which rest upon sills 4. The uprights 3, rest against the sides of the tank. The

discharge end of thetank is closed by a Specification of Letters Patent.

verticalend board 5, but the opposite end 6, of the tank is, closed by an inclined end board 7, and the end, 6, constitutes the-feed end of thehopper, into which the ore pulp flows from a feed box 8.

The end board 7, inclines inwardly and downwardly from its outer end 9, to the bottom or floor portion 10, of the tank, which causes the ore pulp flowing into the tank from the feedbox to flow into the adjacent'end andbottom of the tank. 1

Each of the opposite sides of the hopper is provided with a slimes launder 11. which is arranged to convey the slimesfrom the top of the tank to the outer end of the hopper, where a downward slimes discharging spout 12. is formed to discharge the slimes. from the water line 13, of the pulp in the tank, as will be more fully described hereinafter. A sand discharge chute 11 is arranged to receivethe sand that is carried over the upper edge of the end board. 5 of the tank, by scrapers to be hereinafter described. 7 V J The struts or uprights 3, of the discharge end of the tank aretallest, and the next two pairsof strutsare progressively shorter, and all of these struts lie against the sides of the tank. To these struts are secured bars 14:, which. incline downwardly at a suitable angle from the discharge end of the tank, to the feed end thereof, as clearly shown in Fig. 1. Alined bearings 15, are securedupon the upper end portions of the bars 14, and similar bearings 16, are secured upon the bars near their opposite ends. A shaft 17, is mounted in the bearings 15, and a shaft 18, is mounted in the bearings 16. The sides of the tank are provided with vertical slots 19, to accommodate the shaft 18, and upon the outside face of each side of the tank and over the slot 19, is bolted a metal plate 20, and these plates are provided with packing boxes 21, through which the outer portions of the shaft 18, pass, the boxes preventing leakage at'the point where the shaft passes through the sides of: the tank. Upon the shafts 17 and 18 are mounted sprocketwheels 22 and 23, respectively, which support a pair of end- Patente'd' May 20," 1919. l Application filed August 26, 1918. Serial No.251,519.

less sprocket chains 24:, which are connected at regular intervals by transverse flights or scrapers 25, in the form of angle bars, on: limb of which is secured to the sprocket chains, while the other limb projects verti cally therefrom.

One end of the shaft 17, extends beyond the adjacent bearing 15, and has rigidly mounted thereon a gear 26. A bar '27, is suitably supported beyond the gear 26, and is connected to the adjacent side struts 3,.by bolts 28, the bars 27, being spaced from the struts 3, by bars 29, as shown in Fig. 2.

A counter shaft 30, is mounted in bearings 31, one of which is secured upon the bar 27, and the other upon the adjacent side bar 14c, and a pinion 32, is secured on this counter shaft to mesh with the gear 26. A belt receiving pulley 33, is also mounted on this counter shaft and power is transmitted from this pulley and pinion to the gear 26, and its shaft 17, and to the sprocket chains 24:. The hubs of the sprocket wheels 22 and 23, are on one side of, or eccentric to, their axial centers, and these eccentrically mounted sprocket wheels produce an even rising and falling movement of the conveyer throughout its length, this peculiar movement effecting exactly the same rise and fall of both ends of the conveyer and also throughout its length, at the same time and to the same extent. This manner of mounting the sprocket wheels gives to the peripheral surface of each wheel a throw movement as it rotates, the throw of which is preferably about three inches, and when the chains are mounted on the wheels, the said wheels are turned so that the positions of their highest points are exactly the same, as clearly shown in Fig. 3, so that as they rotate they will impart the same rising and falling movement to each end, and as well to the entire length of the conveyer.

The bottom or floor 10*, of the tank inclines upwardly from the lower edge of the end board 9, to the sand discharging chute, and as the conveyer rotates, the flights'or scrapers on its under lap will engage and move the sand that has settled out of the ore pulp onto the floor, upward along the floor, to the discharge chute l1, and this floor inclines at a slightly less angle than the belt, so that its upper end is a little farther away from the lower lap of the belt than its lower sand receiving end.

Spacing tubes 34, define the distance between the side bars 14:, and the said bars are held against the ends of the tubes by bolts 35, which pass through the bars and through the tubes.

The operation is as follows:

Ore pulp, which is finely pulverized ore and water mixed in such proportions as to form a flowing stream, flows continuously from the feed box into the feed end of the tank, and fills the tank up to the water line 18, and the slimes produced, which is a floating product carrying values, flows from the tank into the launders 11, and discharges through the slimes discharge spout 12, from which they are conveyed to further treatment.

The finely pulverized gangue or sand product of the ore pulp settles to the floor of the tank and is moved up its inclined surface into the sand discharging chute 11 from which it discharges as a dewatered product, and it may be dried and carried to further treatment or may be allowed to run to waste. The intermittent upward and downward moving, endless conveyer acts as a rabbler of the ore pulp as its flights engage and sink into the heavier sand and gangue products, and as its flights move it upwardly they also have a lifting action on it that loosens it up in the water and allows the slime product to separate from it and rise to the surface of the water, from which it flows off and is saved, while the particles of mineral that are too heavy to float, settle, and in settling classify themselves in the sand in the order of their specific gravities. Consequently this continuously rabbling action of the apparatus constitutes a very valuable feature of my invention, and it does not in the least interfere with the continuous outward feeding and dewatering of the sand, which, after it is moved above the water in the tank, is very rapidly dewatered as the water runs out of it down the inclined bottom of the tank back into the ore pulp.

As the conveyer is lifted throughout its length once during each revolution of the sprocket wheels, the water carried forward by the scrapers with the sand is thereby given an opportunity to flow backward after the sand is raised above the water line, and thus the sand discharged from the tank car ries a. much smaller percentage of water than would otherwise be the case. a

My invention shows a very simple and an entirely novel multiple movement dewatering, classifying and rabbling apparatus that is thoroughly practical and inexpensive, and while I have illustrated and described the preferred construction and arrangement of my invention, I do not wish to be confined to it, as improvements and changes may be made in it without departing from the spirit of my invention.

hat I claim as new and desire to secure by Letters Patent, is: i

1. In an ore pulp dewatering, classifying and rabbling apparatus, the combination of the tank, the endless "chain conveyer having an eccentric movement adapted to impart an upward and downward and a reciprocating movement, and means for imparting a continuous traveling movement to said conveyer, said conveyer consisting of sprocket chains'spaced a predetermined distance apart in said tank and metal flights extending transversely across, between and secured to said chains, said sprocket chains being mounted on sprocket wheels mounted on shafts eccentrically tofltheirwaxial centers and arranged to move the conveyer through.-

out itslength upwardly and downwardly, or a rising and falling and at the same time a reciprocating movement, and means for imparting a continuous traveling movement to said conveyer.

2. A dewatering, classifying and rabbling apparatus for ore pulps, comprising a tank, an inclined endless traveling conveyer in said tank supported on shafts at its opposite end portions and provided with sand moving flights, eccentrlcs secured on sald shafts and arranged to give to each conveyer an upward and a downward and a reciprocating movement, and arranged to feed the sand in said ore pulp from said tank, and a slimes overflow outlet on said tank.

3. In dewatering, classifying and rabbling apparatus, the combination of an operating.

ore-pulp holding tank provided with an automatically operating floating slimes overflow at one end and a sand discharging out let at its opposite end, said sand overflow being positioned above said slimes overflow, with a continuous traveling reciprocating movement endless conveyer mounted in said tank at a downward incline from said sand outlet an eccentric throw movement u and down and a continuous traveling movement to said conveyer in said tank, said conveyer being supported on rotating shafts, eccentrics secured on said shafts and arranged to impart to the opposite ends of said conveyer a simultaneous throw and reciprocating movement, and means for applying operative power to said shafts and their eccentries and said conveyer to move and discharge the said sand from the sand outlet of said tank.

4. In a dewatering, classifying and rabbling apparatus, the combination of an operative ore-pulp holding tank, with the continuous traveling reciprocating movement conveyer, provided with the eccentrically mounted supports, suitable conveying members, and sand rabbling projections secured charging outlet above its I slimes overflow end, aninclined floor in the bottom of said tank extending downwardly from its. sand discharging outlet toits slimes overflow end, a hopper on said tank having a downwardly inclined floor extending tothe bottom of the floor in said tank, and a downwardly extending eccentric throw reciprocating endless sprocket chain conveyer provided with sand moving flights arranged in said tank, and inclined to receive sand from the floor of said hopper and carry it to and discharge it through said sand discharging outlet and from said tank, the opposite ends of said endless conveyer being mounted on eccentric sprocket wheels, said eccentric sprocket wheels being mounted on and secured to shafts, said eccentric sprocket wheels being positioned in the same relative throw relation to each other on said shafts at opposite ends of said conveyer, said shafts extending from said eccentric sprocket wheels beyond said tank, a supporting frame extending above the sand discharging end of said tank and beyond its opposite sides to the lower end of said conveyer, and provided with boxes positioned to support said shafts, means including gearing for rotatively driving the upper shaft, said lower shaft extending through said tank below its water line, and means including stufling boxes on said lower shaft arranged to bear against the outside of said tank for preventing leakage around said shaft.

6. In an apparatus of the character described, the combination with a tank having an inclined bottom, of shafts, one of which is mounted in one end of said tank so as to be submerged, while the other is mounted above the water line at the other end of said tank, sprocket wheels on said shafts whose hubs are eccentric to the axial center of said sprocket wheels, endless chains connecting said sprocket wheels and transverse scrapers connecting said chains, the highest points of the wheels being in the same direction, so

that the chains are raised throughout their lengths during each rotation of the wheels,

and means for rotating said wheels.

7. In an apparatus of the character described, the combination with an inclined tank, the sides of which are provided with vertical slots near one end, of plates bolted over said slots having packing boxes thereon, a shaft extending through said packing boxes and adapted to be located below the water line of the tank, inclined bars along the sides of said tank and bearings on said bars to receive the ends of said shaft, a shaft mounted in bearings on the opposite end portions of said bars above the water line of the tank, sprocket wheels eccentrically mounted on said shafts, endless chains connecting said sprocket wheels, and transverse scrapers connecting said chains, and

In testimony whereof I affix my signature 111 presence of two Witnesses.

CYRUS W. MOARTHUR.

means for rotating said chains, whereby heavy material settling in said tank is carried forward and above the Water line of said tank, a discharge spout for said heavy material and launders for receiving such material as floats 0n the surface of the Water in said tank.

Witnesses: G. SARGENT ELLIOTT,

ELIZABETH SMITH.

five cents each, by addressing the Commissioner of Patents Copies of this patent may be obtained for Washington, D. 0.

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