US1065213A - Coal-washer and ore-concentrator. - Google Patents

Description

A. G. CAMPBELL. COAL WASHER AND ORE CONGENTRATOR.

APPLIOATION FILED JUNE 5, 1912.

Patented June 17, 1913.

3 SHEETSSHEET l.

INVENTOR Alonzo C. Cam

bell By M A TTOR/VE Y 8 A. c, CAMPBELL. COAL WASHER AND ORE GONOENTRATOR.

APPLICATION FILED JUNE 5, 1912.

Patented June 17, 1913.

a SHEETS-SHEET 2.

OOOOOO OOOO Campbell IT. Hun. Irv-n WITNESSES Alonzo C.

ATTORNEYS COLUMBIA PLANoaRAPn 60.. WASHINGTON, D. c.

A. C. CAMPBELL COAL WASHER AND ORE GONUENTRATOR. APPLIGATION FILED JUNE 5, 1912.

1,065,213, Patented June 17,1913.

3 SHEETS-SHEET 3.

Alonzo C. Campbell 77TWT N COLUMBIA PLANDGRAPH C0,, WASHINGTON, n. c.

ALONZO C. CAMPBELL, OF ASHEVILLE, NORTH CAROLINA.

COAL-WASHER AND OBE-CONCENTRATOB.

Specification of Letters Patent.

Patented June 17,1913.

Application filed June 5, 1912. Serial No. 701,788.

To all whom it may concern:

Be it known that I, ALoNzo C. CAMPBELL, a citizen of the United States, and a resident of Ashevill-e, in the county of Buncombe and State of North Carolina, have invented a new and Improved Coal-Vasher and Ore Concentrator, of which the following is a full. clear, and exact description.

The invention relates to coal washers and ore concentrators, such as shown and described in the Letters Patent of the United States, No. 695,790, No. 835,397, and No. 898,314, granted to me on March 18, 1902, November 6, 1906 and September 8, 1908, respectively.

The object of the present invention is to provide a new and improved coal washer and ore concentrator arranged to prevent back sliding such densities of the material under treatment as should go forward, and to insure the movement of all the material in the proper directions so that the capacity of the machine is increased as the working surface has a great jigging and panning effect to hasten concentration and also to hasten on discharge of heads.

For the purpose mentioned use is made of a pan, means for oscillating the pan and imparting a percussive action to the same, the said pan having a working surface made in sections inclined forwardly and clownwardly to cause the concentrates to flow by gravity forwardly to the point of discharge while the tailings and water flow by gravity rearwardly into the tailings discharge.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a sectional side elevation of the coal washer and ore concentrator, the pan being shown in elevation; Fig. 2 is an enlarged sectional side elevation of the pan provided with one form of ritlles, the section being on the line 2-2 of Fig. 3; Fig. 3 is a plan view of the same; Fig. 4 is a sectional side elevation of the pan provided with another form of riffies, the section being on the line 4E4C of Fig. 5; Fig. 5 is a plan view of the same; Fig. 6 is an enlarged cross section of the pan shown in Figs. 2 and 3, the section being on the line 66 of Fig. 2; and Fig. 7 is an enlarged cross section of the pan shown in Figs. 4 and 5, the section being on the line 7-7 of Fig. 4.

Successful operations of washers as heretofore constructed have been balked to a considerable xtent by the accumulation of a large body of material of different densities that would neither move one way nor the other or would travel forward and backward and never discharge either at the head or the tail of the machine thus over-burdening the pan for no good purpose. In order to overcome this difficulty and to insure movement of all the material in the proper and desired direction and thus increase the working capacity of the machine is the main object of the improvements presently to be described in detail.

The pan A is hung on suspending rods B depending from the main frame C of any approved construction, and the said pan A is provided with a head block A adapted to bump against the bumping block D held on the main frame C, and the said head block A is provided with a flange E connected by a connecting rod F with the upper end of a forwarding lever G carrying at its lower end a friction roller G engaging the cam groove H in a cam wheel H attached to the main driving shaft I journaled in suitable bearings on the main frame 0 and connected by pulleys and belts or other devices with machinery for imparting a continuous rotary motion to the said shaft I. The detailed construction of the forwarding lever G is approximately the same as the one shown and described in the Letters Patent of the United States, No. 695,790, above referred to, so that further description of the same is not deemed necessary.

The pan A is constructed in detail as follows, special reference being had to Figs. 2 to 7. The head block A previously mentioned forms part of a keel or a longitudinally-extending rib A cut out on the top in the form of saw teeth and similarly out side bars A on opposite sides of the keel A formwith the latter a support for the bottom pieces A resting on the inclined cut-out portions of the keel A and the bars A The forward ends of the bottom pieces A support cross bars to form barriers A The sides A of the pan A are secured to the side bars A and the sides of the bottom pieces A, as will be readily understood by reference to Fig. (3. On the inner faces of the barriers A and resting on the bottom pieces A. are secured transwerse strips J, and triangulanshaped strips J extend longiti'ldiimlly long the sides It oi the pan and likewise rest on the lottoin pieces it. The strips J and J lorin supports for the forward ends of the sides oi screens hi, K passing at their rear ends to the rear ends of the bottom pieces ft. thins twining with the latter and with the barriers A hutch pockets L from which lead openings N forn'ied in the cross strips J and the harriers The foremost bottom piece A is inclined in the reverse direction to the bottom pieces A", that is, the latter are inclii'ied forwardly and downwardly while the front or head bottom piece It is inclined downwardly and rearwardly, and the screen K overlying this upper bottom piece It is inclined downwardly and rearwardly in contradistinction to the forward and downward inclination of the other screens K. fin apertured barrier A1 is arranged on the forward end of the head bottom piece A and a similar barrier A is arranged on the rear end of the lastbottoin piece A for the passage of the tailings from the pan A, hereinafter more fully explained. The screens K and K are prefenbly constructed with meshes gradually increasing in size from the tail end of the pan to the head end thereif, as plainly indicated in Figs. 3 and Ti ithin the pan A. are arranged transversely-eXtending' perforated ritl'les inclined forwanlly and dowrnvardly, and each tern'iinating at its forward end in a tlap valve 6, riveted or otherwise secured to the body of the ril'lles O, the .trce end of the tap valve O resting on the .cm'responding screen h. or K and at a point intermediate the ends thereof. The sides of each ri'tlie O are bent around longitudinally-extending rods O having rearwardly-eurved spring extensions terminating in eyes 0* engaged by bolts P held t1.'.11iSYO1SGl in the s s A of the pan A, as plainly shown in 6. By the arrangement described the ritl'les O are tree to swing up or down owing to the spring extensions 0 permitting the supporting" rods 0' for the ritl'les O to flex. By thi use of the spring extensions U a tension resistance is provided for Qttjlfl rillle O to hold the latter against the free upward swinging movement. that is, to hold the lap valves O with a desired force in contact with the screens K.

In the niiodified form of rillles shown in Figs. 1-, and '5, each rillle is made in sections ar'anged one alongside the other in a transverse diretion, and each terminating at its rear upper end in an eye U through which extends a rod P which extends tl'irough the sides ii of the pan and is fastened thereto by nuts P By the arrangement described. the sectiois o'li each rillie 0" are free to swing iip or down one inc ependent of the other instead of the entire ritllc t) swinging up and down. The cinistruction of the pan provided with the ritlies U is the same as above described in reference to the ril'lles 0, so that further (ilescription of the modified form shown in Figs. 4, 5 and 7 is not deemed necessary. The material to be tr lated is placed into a hopper Q mminted on the frame C and ha ving an. outlet spout Q. provided with a pivoted tilter Q for delivering the material to the pan A, preferably one-third of the distance from the head of the pan 4%.. A water supply pipe it connected with a suitable source of water is provided at its outlet with a spreader R cdistribute the wate at the head of the pan A. A portion of the water is also passed by branch pipes R to the hopper (.1. T he material passing out of the end of the pan A. drops int i a sluice S while the railings pass over the tail end of the pan A and drop into a railings sluice T. both sluices S and T be ing mounted on the main frame C.

ll hen the machine is in operation the pan A is oscillated and receives r percussive action by the mechanism shown and described, and by this action of the pan the more do: stu'tt is a used to settle to the bottom and to adhere with some degree of persistency to the fixed screens K. At the head of each hutch pocket L nearest the barrier A the How or buoyancy of the material is greatest, diminishing rapidly and disappearing at the tail or rear end of each individual pocket L, with the general etteet to gradually enrich the overlying bed of material as the latter travels :torward on each individual screen K. The action described is the first step in the process of concentration. The more massive bed of the dense stuff or taat which clings more persistently to the screens K bumps forward uninterruptedly, and passes under the swinging ri es, trap-like, and onto another series of riltles (l. more persistently massive toward the headdischarge. Portions of the feed stuitl of liner grain. and less dense undergoes more or less of" over and under circuitous How and diiltusion with the water. It will not cling so pers stently to the screens. At this juncture, the perforate swinging ritlles O come into play :to arrest the too precipitate flow of the diffused mass. fi edimcntm tion will take place on the inclining areas,

and the buoyant cite-ct of this water interm! cntly lurched through the pr: areas will cause a second or a re-washing ot the material, peculiarly modified, as will appear presently. The line dense strait passes through the perforations oil? the ri tiles O and in tcrmii'igles and nnsses with the under trend accumulating from riftle to riflie and finally discharging at the head. That portion that cannot go through the perforations, being too large or too light, is jigged to that extent that the light stuff, coal or gangue, drifts with the water to the tail end of the machine and discharges over the barrier A" into the tailings sluice T. That part of the material which is more dense moves down the inclined riftles O by the fourfold effect produced, first, by gravity, second, by impact; third, by the buoyancy of the water flowing up through the perforations of the ritlles; and, fourth, by the lo-dgment from the water filtering back through the perforations instead of overflowing the upper ends of the ritlles. The latter action seems to be the most effective to prevent backsliding, which is most damaging in washers as heretofore constructed. The fourfold effect referred to, to retard backsliding of such densities as should go promptly to the head, constitutes the main feature of the present improvement, it being understood that the capacity of the machine, particularly on fine stuff, is twofold with greater enrichment of headings and of tailings of ore or of coal. It will also be noticed that the working sur face has great jigging and panning effect to hasten concentration and also to hasten prompt discharge of headings. Owing to the many safeguards against backsliding of the values, the pan A may have much greater inclination or a fall, thus favoring a more rapid discharge of the tailings.

The flap valve 0 on the lower margin of each riiii-e O forms a safeguard to prevent back flow of the water under the corresponding riffle, and the flap valve also serves as a favorable lodgment for the line dense stuff that would otherwise be buoyed by the too violent upflow and the uplift of the rittle at each bump of the pan. The flap valve also serves to hold down the spacing under the ritlie to the most suitable gage by the weight of the superincumbent mass that is not dif fused by the water.

By using multiple riftles more pliability is given to the machine and the latter is adapted to handle very fine material, that is, such that the weight of the riflle is sufficient to hold it down to the proper gage, and in the event of the bed compacting more in one place or on one side than on another.

The head pocket of the pan is slightly different from the other pockets, as above described and shown in Figs. 2 and t. The intention of the slight rise in the grade of the working surface, at the head of the pan is to float the water back from the head discharging mass, that it may be practically free from water, thus giving it greater impetus of discharge; and, too, the back wash makes it much cleaner, it being understood that solid matter has near double the clinging power, or adhesiveness when not submerged.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A machine of the class described provided with a pan, and means for oscillating the pan and imparting percussive action to the same, the said pan being provided on its bottom with pockets having screens at the tops, and transversely-extending swinging rittles inclined forwardly and down wardly and fulcrumed at their rear elevated ends, the free forward ends of the swinging ri'lfles resting on the said screens intermediate the ends thereof.

A machine of the class described provided with a pan, and means for oscillating the pan and imparting percussive action to the same, the said pan being provided on its bottom with pockets having screens at the tops, the forward end of each of the pockets being in the form of a barrier, and transversely-extending swinging ritlies inclined forwardly and downwardly and fulcrumed at their rear elevated ends, the free forward ends of the swinging ritlies resting on the said screens intermediate the ends thereof.

3. A. machine of the class described provided with a pan, and means for oscillating the pan and imparting percussive action to the same, the said pan being provided on its bottom with pockets having screens at the tops, the bottoms of the pockets and their overlying screens being inclined forwardly and downwardly and the forward end of each pocket being in the form of a barrier, and transversely-extending swinging ri'tlies inclined forwardly and downwardly and fulcrumed at their rear elevated ends, the free forward ends of the swinging ritfles resting on the said screens intermediate the ends thereof.

at. A machine of the class described provided with a pan and means for oscillating the pan and imparting percussive action to the same, the said pan being provided on its bottom with pockets having jig screens at the tops, the bottom of the head pocket having an approximately horizontal bottom and the screen of this head pocket being inclined rearwardly and downwardly, and the bottoms of the remaining pockets and the Overlving screens of these pockets being inclined forwardly and downwardly, the forward ends of the several pockets being in the form of transverse barriers having openings, and transversely-extending swinging rifiies in clined forwardly and downwardly and fulcrumed at their rear elevated ends, the free forward ends of the swinging riltles resting on the said screens intermediate the ends thereof.

5. A machine of the class described provided with a ,pan and means for oscillating the pan and imparting percussive action to the same, the said pan being provided on its botton'i with pockets having jig screens at the tops, transversely-extending swinging riliies inclined forwardly and downwardly and it'u'lcruinml at their rear elevated ends, the tree forward ends of the swinging ritlles resting on the said screens intermediate the ends tl-iercot. the riilles being supported by aid of side rods, said side rods having rear ends terinimiting in eyes, and pivots secured to the sides of the pan and engaged by the said eyes.

(3. A machine of the class described provided with a pan and means for oscillating the pan and inipaiiting percussive action to the same, the said pan being provided on its bottom with pockets having screens at the tops, the screens having meshes gradually increasing in size from the tail of the machine to the head thereof, and transversely-extending swinging ritli-es inclined forward and downwardly and fulcrunied at their rear elevated ends, the free forward ends of the swinging ritl'les resting on the said screens intermediate the ends thereof.

7. A machine of the class described provided with a pan and means for oscillating the pan and imparting a percussive action to the same. the pan being provided with swinging ritlles inclined downwardly and. forwardly toward the head of the pan. each rittle having a tension resistance against upward swinging of the ritlie.

8. A machine of the class described provided with a pan and means for oscillating the pan and imparting percussive action to the same, the said pan being provided on its bottom with pockets having screens at the tops, the bottom of the head :pockct having an approximately horizontal bottom and the screen of this head pocket being inclined rearward'ly and downwardly, and the bottoms of the remaining pockets and the oven lying screens of these pockets being inclined forwardly and downwardly, the forward ends of the several pockets beingin the form of transverse barriers having openings.

S). A. machine of the class described provided with a. pan and means for oscillating the pan and imparting percussive action to the same, the said pan being provided on its bottom with pockets having screens at the tops, the bottom ot the head pocket having :av substantially horizontal bottom and the screen of this head pocket being inclined rearwardly and downwardly and the bot toms of the remaining pockets and the overlying screens of these pockets being inclined forwardly and downwardly, the barrier bounding one side of the head pocket extending above and below the adjacent end 01. the pocket being provided with a discharge opening at right angles to said barrier.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALGNZO C. CAMPBELL. lVitnesses:

Vomvo L. Gnnonn, LUG] LE CAM rnnnn.

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

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