US1332863A - Concentrator - Google Patents

Description

W. COTTRELL.

coNcENTRATon.* v APPLICATION FILED MAY I8. I9IB- 1,332,863. Patented Mar.2,1920.

2 SHEETS-SHEET 1. I

w. COTTRELL.

CONCENTRATOR.

APPLICATION FILED. MAY I8. |918.

1,332,863. Patented Mar. 2V, 1920.

2 SHEETS-SHEET 2.

Fig .s

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CONCENTRATOR.

Application filed May 1s, 1918. serial No. 235,310.

T0 all wltom t may concern:

Be it lmown that I, WILLIAM COTTREIL, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Concentrators, of which the following is a specificationl' This invention relates to a concentrator having a table with riflies thereon, and in which either air or water may be used as the concentrating agent.

The ultimate object of this invention is to provide a concentrator having a high -capacity, a high extraction,Y which is simple and requires little attention to its operation.

Specific objects of this invention are first, to provide a concentrator of the class described in which the concentrating iluiid-` agent continuously maintains the comminuted ore carrying stuff in such state of separation and suspension that the ore may sink to the bottom, vand the angue or tailings rise to the top of the ri es; second, to p-rovide a table of such character that the ore travels vsubstantially parallel with the rifie's, while the tailings have a movement transverse to the 'rifliesg third, to provide crowders in the riilles to assist in moving the tailings transverse to the riiiles so as to increase the capacity of the machine; and fourth, to provide means vto carry away the dust which is created by dry separation.

I accomplish these objects by means of.

the embodiments 'of my invention illustrated in the accompanying drawings, 1n whlch:

Figure 1 is a side view in elevatlon of a concentrator arranged to use air as the concentrating agent. Fig. 2 is a vertical section as seen on the line 2 2 of Fig.` 1. Fig. 2a is a plan view of thel hopper as seen looking in the direction of the arrows` 2a in Fig. 2. Fig. 3 is an end elevation of the tail end of the table. Fig. 4 is a fragmentary pla-.n4

view of the tail end of the table. Fig. 4a is a section as seen on the line 4-4a of Fig. 4. Fig. 5 is a diagrammatic plan View of the. table. Fig. 6 is an enlarged vertical section through the rifles on the table asl seen on the line 6-6 of Fig. 5. Fig. 7 is an enlarged fragmentary plan view of a crowder in position between two ritlies. Fig. 8 is a fragmentary plan view of anotherV type of crowder disposed/in a riie.

:Referring particularly toFig. 1, A indicates the foundation frame, which supports the table B. A dust separator is indicated by Communicatingwith the dust separator is a blower D, which discharges into the air chest of the table.

Thetable is supported upon the foundation frame by meansof'leaf springs 9, 10

and 11 and is transversely inclined.

Specification of Letters Patent. i 'A Patented Mar. 2, 1920.

construction permits/movement of the table transverse t0 the springs. Secured to the foundation frame is a standard 12 having a block 18 mounted upon its top beneath the table. Mounted upon one end of the block is a buffer cushion 14 disposed to engage a` cross piece 15, which is securedto the under side of the table.

Fixed to the underside of the table is a bracket 16, throughwhich f passes a rod 17. The rod is slidably mount-v ed in standard 12, and mounted thereon between its'head and the standard is a compression spring 18.` The head may be adjusted to vary the spring tension, and the buffer and cross piece serve to jolt the table.

The table comprisesa casing 19 having a hinged door 2O disposed above a launder I 21. A riflie board 22 divides the casing into two compartments, the lower one forming an air chest, and the upper one a dust chamber. Communicating with the dust chamber at the upper side thereof is a hopper 23,-.

through which material is delivered to the riile board. A gate 24 controls the feed of material onto the table. 1

Referring particularly to Figs. 5 to 8in-4' cl usive, 25 indicates riiiies which extend longltudlnally of the riiie board from the head end H to Athe tailend4 T. These riffles are i parallel, and due to the shape of the board increase in length from the upper side to the lower side. rilie board is closed by a board 26 sothat TheJ .inclined Side of the.

material which reaches the end of the upper riffles will have to travel transversely toward the tail end thereof. It will be noted thatthe riffles extend the full length of the v.

The rile board is preferably formed of one side of each of the channels are small perforations 27 Upon the opposite side ofv each of the channels are small perforations 28. In the channels are crowders 29 which are preferably formed of sheet metal and are tetrahedronsfor double vItiwill be noted that one exposed face of each ofthe crowders inclines upwardly and rearwardly,

-While the 'otherl exposed vface inclines upwardly and forwardly. It spreferable that the top edge of the crowder' be spaced a short The riffles' communicate at the tail end arethree spouts shown herein having the common'inlet separated by -gates 31.` The` gates are fixed to shafts. 32,'which extend 'through' the.l casingand are bent upwardly to form arms by which they may be turned.

The shafts'j'3'2 are ofspringmetal andthe -ends thereof enage with a'ratchet 33 so thatthey vmay locked in position. A spout 34 is connected to the end of launder 21. '.The mineral as it leaves the ends of the 'riles discharges into the spout inlet and is separated into-dierentclasses, although the` number o f classes ma be varled by" using l moreor less spoits. y shifting Athe gates 31, adjustment may be made so that any one spout will receive ore from a variable num-A ber of' riilies. vThe spout34.

lThe discharge of the blower D is connected by a pipe 35 to the air chest towhich it supplies a1r under pressure. The air then passes througl the perforations 27 and 28 1 1n the rile ard, upwardly inclined currents of air from opposite directions meetf ing in the spaces -betweenrillies and creating and'tend to .hold itin suspension as 'well-"as dation frame A. pipe 36,l which'discharges into a-'dust'sepl stirring it u' However, the air. currents have no ten ency to. blow the material off from the table."\The.pipe 35 iiexible tol permit movementof the table with respect tothe blower which is `fastened to the founvConnected to the dust chamber a liexible arator C. The dust separatorC-is mounted be ofany well lm own type, and as'it forms no svpart of the --inventlon will not be described.. Leading from `the air discharge v,of

l the dust separator to the inlet ofthe blower i 38.1 lAny dust lwhich is raised on- A lis a vpi the Vil);

table will vbe, sucked through the dust separator, and the clean air -will pass to theinlet of the blower.-v

The table B'v is' vibrated'by means' of an..

eccentric 39 fixedto 'ashaft 40,1and which may bemadeadjustable so that the proper "ovelbalance maybe obtained. A ulley 114 isl fixed to shaft 40 for rotating t e eccentric. The pulley 41 is rotated by. means of' a belt 42`passing over a pulley on the drivev 4 3.. The springs 9, 10 and' `11 assist tailings discharge air Aeddies,v which agitate the material" in the movement of thetable, the olting oil-' curring. when buffer 14 strikes cross piece 15.A

. yAs the table is vibrated, and Lmaterial fed to the upper side of thehopper the 'material spreads itself thereover, the heavier particles gravitating to the bottom of the grooves.

The lighter 'material' gradually moves vover the top of the toward the lower side of the table. Some of' the heavy particles na'lly reach the-'board 26,where itis prevented `from moving further longitudinally,

v and when the riilles s aces become filled with mineral at those Aen s, -it crowdsl Over-and' works itself'transversely .towardjthel spout at the tail end. The air-which e'ntersthe rilies stirs up the material, tends to hold it in suspensiombut doesl not blow it kolf the table.

Due to the velocity may be maintained, therebyv producfine and closely grouped aperf tures, a lowair pressure and a low air `stream ingamaximumand -"evenly distributed a i'- f tation, and the material is not blown oi't e table. It' will also be-noted that the apertures are grouped so as to leave an imperforate space near lthe bottom of the valleys. This space is a dead s'pace'in. which the. values may collect and remain undisturbed byj the air.- These-features of construction-all increase the eliiciency of separation.

Thecrowders 29 produce thesame effect as'the board'26 in vforcing the tailings transversely, but permitthe heavy particles to move over the crowders and continue along the -riles' The board v26 and crowders per# form substantially all the worlr of mo leo the tailings transversely of the 'tablef With 'i over the table so thatthere is a'high extraction.v f Y I have described the operation of the device as a dry concentratorn=-However5 lwhile 'this construction separation takes place all i.

the table isveryv eilective when so used, it y `may be used as -a wet concentrator. .1n-)such casetheblower B would be replacedjby a the crowders and-without the water being` supplied through :the rille boards, that is,

the water may fed upon thel boar-dat the "head end.

riliies opening in tojthe Aspaces therebetween `vso as to dn'ect Huid upwardly thereinto, said apertures being grouped'to end short-of the bottom of the 'spa-ces'between saidrile's so as to forma dead space at the bottom. .2.- A reciprocablc concentrating table hav# lmg rilies extending longitudinally thereof, v

means inclinin toward the tail end of said table to. crow st ulf ftnsversely, closely 110' pump, and therev would be no needl of a dust separator. The table may also be used with upon 'standards 37, which arexed to the Y z foundation" frame.. The dust separator-may' s 50 grouped line apertures'in said riiiies opening into the spaces therebetween so as to direct opposing currents of Huid from both ing riilies extendingvlongitudinally thereof, means inclining-toward .the tail end of said table to crowd stuff transversely, closely grouped Ji-ne apertures in said riliies opening into the spaces therebetween so as to direct opposing currents of f iuid ffrom both y sides of said spaces upwardly normal to the Y direction-of motion of said table, said apertures being grouped to end short o'f the bottom of the spaces between said riiies so` as to form a dead space.

4. A concentratingv table having riies, crowders in the spaces between said rimes, said crowders having surfaces incliningupwardly toward the tailings end' with respect to the surface of the table.

5. A' concentrating table having riliies, crowdersin the spaces -between saidriiles, sa`id-crowders having surfaces arranged diagonal to said riifles and inclining upwardly toward the tailings end 4with respect to the surface of theitable. l

6. A lconcentrating table having riifles,

crowders distributed over the surface of the table in the spaces between said riifles, said crowders being tetrahedrons;

7. A concentrating table having riiiies, crowders distributed over the surface of the table in the spaces between said riiies, said crowders having surfaces arranged diagonal to said riflies, apertures in said riflies opening into the spacesktherebetween-so as to direct fluid thereinto.

8. `A concentrating rtable having riiies,

.crowders `distributed over the surface of the table in the spaces between said riiies, said .crowders having surfaces-arranged diagonal to said riiiies and inc'lining upwardly toward the tailings end, apertures in said riiies opening into the spaces therebetween so as to direct fluid thereinto. v

I between so as to .direct'iiuid thereinto.

1 0. A. concentrating table having riliies, crowders .distributed over the :surface --of the table in the spaces between said riies,-.

said crowders having surfaces arranged di'- agonal to said rile's, apertures in said rlffles opening into 4the spaces therebetween vto direct: opposing currents of uid.

l'11. AA concentpatilngtable having undulating hill and'lvalleyriifles, crowders -in theI spaces between saidrifiies; said crowdershaving surfaces arranged diagonal t0 said riies and inclining upwardly toward the tailings end, apertures injthe. inclined sides i having rif-deakof said'riiiiesopening in the spaces there-v between so as to direct opposing currents to fiuid from both sides of said spaces. 12. A concentrating table having rililes,

croyvders in the spaces between said riliies,

.said crowders being .tetrahedron's,' apertures .1n said riiles opening' into the spacesthere between so as to direct opposing currents `of fluid from both-sides' of saidspaces.

13. A'l concentrating table having riffles 75 extending longitudinally thereof, said table inclined transversely, crowders in the Spaces between said riliies, said -crowders having surfaces. inclining upwardl toward the tail- U table. v v 1 4. A concentrating table having Vriflies I extending longitudially thereof, said table being inclined transversely, crowders the ings end with respectto t e surface of thespaces between said riiiies, said crowders r` having surfaces larranged diagonal tosaid riiles and inclinmg upwardly toward .the

tailings end.i l

15. A concentrating table vhavin riffles extendinglongitudinallythereof, sald table being inclined, transversely, crowders in the spaces betwen said rifles, said crowders be,- ing tetrahedrons l x16. A concentrating table having rifHes extending longitudinally there-of, saidtable being inclined transversely, crowders 1n thel spaces between saidl riiiles, said crowders having surfaces arranged .diagonal vto'said riiiies, apertures in said riifles opening into the spaces therebetween so as to direct fluid thereint0. X Y

17. concentrating table having riflies extendlng longitudinally thereof, said table being inclined transversely, crowders in the spaces between sald rliies, said `crowders '105' having surfaces arranged diagonal' to -said riiiies and inclining upwardlyv towardthe tailings end, aperturesin said riii'es?A opening, into the spaces therebetween so as to direct Huid thereinto.

18. A concentrating table having rifle's extending longitudially thereof,sai d table being inclined transversely, crowders in the spaces between said rimes, said crowders vbeing tetrahedrons, aperturesin said riifles opening into the spaces therebetweenl so as to directiuid thereinto,v

19.A4conce'ntrating table having riiiiesJ lextendin longitudinally thereof, said table being inc ined transversely,`jcrowders in the 120 spaces'fbetween `said rimes, said crowders havlng surfaces arranged diagonal to said riies, apertures in said riliies opening into the spaces therebetween so as to direct opposing currents of iuid from both sides of said spaces.

205A concentrating table havin riiies extending longitudinallythereoi sald table a being inclined transversely, lcrowders inthe 'spaces between said riies, said crowders 130 having surfaces arranged diagonal' to said spaces between said riies, said crowders 10 riiHes and' inclining upwardly 'toward the being tetrahedrons, aperturesin said riies.

tailings' end, apert'ures'in said ries openopening into the spaces therebetween so as ing into the spaces therebetween so as to to direct opposing currents of Huid from- `5 direct opposing currents of Huid from both v both sides of said spaces.

sides of said spaces. In witness that I- claim the foregoing I 15 21. A' concentrating table having .riiles have hereunto subscribed mydnarnev this 10th extending longitudinally thereof, said table day of May, 1918. being inclined transversely, crowders in the v n' VILLIAM COTTRELL.

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