US1599293A - Machine for recovering precious-metal concetrates - Google Patents

Description

Sept. 7,1926. 9

' A. W. SEVERANCE MACHINE FOR RECOVERING PRECIOUS METAL GOIICENTRATES Filed August 18, 1924 4 ShuthShaet 1 Sept. 7 1926.

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W/f/ve-sa es: 9 MIA/ g, gw M f his lnven/cr 6 17b h y A. w. sEvERANc': MACHINE: FORIREGOVERING PRECIOUS METAL cogcsu'riuwss Filed August '18, 1924 Sept. 7 i926 fldam W Jeve/ance f his W/fh asses Ana/31,0. gwm

S'g'pt. 7, 1926. 1,599,293

A. w. SEVERANCE MACHINE FOR RECOVERING PRECIOUS METAL GONCENTRATES Filed August 18, 1924 4 SheetsShoot 4 W/i'nasaes; flwehfw, HWQ, 5W1 fla am W @Severance Patented Sept. 7, 1926.

1 s zrarns ADAM w. .snvnnnnon,ion ronrtAnn, oREeon; AssIGNon TO ,onnsevme MACH-ZINE 1 :oo. on PORTLAND, OREGON, U

theorems l on nncpvnsrns rascrons Mn'i'r-u. 'ooNcENTRArEs. it

lApplication-filled.August 18, 1324. iserial N0. 732,704.

-"l\ Iy .inventionfis intendedior use in the recovery of precious :metal concentrates, and isladapted particularly, :for use in arid countries Where all year-unining operations are unknown at-the present-time because of a lack (of necessary Water. v.In .my invention' I have so constructed the machine that the Watermay befused-overand over again. I am aware that informer machines .the agitation of the ater is caused by the pumping of airunderpressure and the same is released undernpressure, at or near the bottom of theworkingibasinr But in machines of-this kind the evapora-tion caused by the release of the air from under pressure was great; I have toundthatcertain flotation-agents and other chemicalsmay be added to the Water :that are ofgreat benefit in the scouring-of 'the precious inetals to be recovered that is not practioalnihere air is used as'an agitating means. y

=-Certain other new and novel elements of my machine reside in the construction of the bottom of my Working tank, and int-he recovery, or ore valve as ivellasin theag tating bars thatare carried through the 'liquid that serve to abradethe materials to be tresliing ofthe surfaces or' faces ot-the Inaterial to be concentrated I create-a-inachine that "has in effectthe essential l elements; for the recovery or the precious -metals by the flotation process. ,Thepumping of the liquids back and the discharging" of the same at or near the bottom otthe settling and V concentrating-tank makjesfpossible the use of a liinited amount of theater and-otthe added inaterialsto that ofthew'ater to provide a suitable vehicleto accomplishthe'desired results.

In=the drawings Kg. 1 is aside elevation dftheiassembled machine showing the arrangementand detail'otthe parts composing-the same. s Fig; 2 isa partial sectional view of the outlet end of the machine.

3is an enlargedsideelevation feeding end oi the -I'Ii'aliine.

' "Fig. 4 isfa' parti'lsectlonal, end 'view taken-on 11m et4c-of jFig. 2 looking in "the direction indicated.-

' ilFig. 5 is -a sectional end view taken-on particul y of the p v 1,599,293} PATENT 11m 5-5 of Fig; [2 lookingdn thetdirection indicatedg ithis .view is made the bottom construction. v V 1 F1g,. 6 is a sectional ,end vIieW,Emade large, of a .part of ztheibottom section y and'imore pipes. U V I 1 Fig. 7 'is:an end sectional viewof :the ore valve :here shown as a segment of :a circ'le, and Whichis of .a different eonstructlon thanzthatusedin the otlleriviewsl .to illustrate 4 zto show the liquid bearing -Q.:Fig. 8 s a-deta'iled ifragmentary vievvot I the agitatinglbars: and the zmeansifor mountlng thesaine.v

Fig. 9 is adetached)sideiel'evation o'fithe side ofithe vinachineinade to illustrate the operating lever torthe ore valve.

Fig. .10 is a bottom plan KViBW Of the matom, and made .to show :the operating method for theiore -.val ve and 'the mechanism efor imparting: a side motion of the machine.

1 is the lowenmember ofathe-baselof the machine here shown as a rolled shape: which chinelllooking mpwa'rd (from below Ithe Ibotto'stheibodyvportion Fig .11 llS also a 'plan' vievvsot one of a is'connectedtO/atOpImember of like mate rial as shown at 3 the same'ibeing connected by. upright members 2. :For 'convenience lin transportation 1 have madehthe frame the tank" in sections that may :be'-reassem-' sections and have provided fiangedaboilting members Brand ;'6 .at which point the vttvo a machine made ot two sections but I do'anot Wish to oe-ilin' ited to la :two section machine I and have h'ere shown :a two gsection ':machine for the purpose ofillustratlo fan'clgdescriptionfibut inth'e larger 'sized machines :it :may,

become neeessary tozmake maehines of more sections.

an ari d country}v and wateris scarce, a-settling basin'9 is provided intogwhicli thel-Water p drains and from Whichitj is pumped back 5 intothe machine. .A suitableipumpingiunit 10is provided' that puinps the Water flOIll when the ahatma-bang o erate-clan}.

water underpressure to create an agitation of the liquids and of the solids that have gravitated to the bottom of the tank. These pipes are made triangular in shape and are laid parallel toeach other, as is shown in detail in Fig. .6 leaving a space between the same to permit of the passage of a rigid member therebetween. The solid matter gravitateswithin this'space and the passage of the rigid member down this passageway creates a grinding action upon the individual particles that tends to renew and polish the surfaces of'the particles to the extent that those of highest speciflc gravity and which are of some magnitude in size will be carried along to the ore valve outlet. The

discharging of the liquid under pressure,

through the openings 16 creates a great agitation. inxthe deposited material, and the fine material such as gold and the like that is so deposited may be carried upward and bescreenedoif as inthe flotation process.

' The liquids being pumped and so discharged is. made to carry those essential elements plate 19 by suitable means and are arranged in substantially parallel rows. The object for making these pipes or conduits in this shape isJthat it permits the making of the bottoininembers flat and the renewal of individual conduits. These triangular pipes are subjected to great wear because of the abrasive materialbeing treatedin substantial quantity and. because of the fact that larger quantities are transported in'certain 'partsrthan in others it is highly desirable that these membersmay be taken out as individual units.

An endless chain 20 is driven and traverses a course about sprockets 25 and 26 and passes about the idler sprocket 27. Disposed. at spaced'intervals, about the chain are cross bars 21'. A flexible connection is provided between the cross bar 21 and the drag bar 28. Lug grinders 29 are attached to the cross bar 28 in spaced relationship, correspondingtothe spaces between the water conduits 23. The length of these lugs is equal to the depth of the valleys between thewater conduits, and the width of each is somewhat less than the distance between the edges of the water conduits. The weight of these cross bars is suflicient tocreate pressureupon these grinding lugs. The agitation caused by the incoming water washes the deposited aggregate and the particles that are sufficiently flne will be suspended in the liquid within the tank, the remainder will be ground between the lugs and the contacting surfaces. Muchof the precious metal that is to be savedxby this machine has lainexposed to the elements for long periods and the same becomes oxidized upon its surfaces, making'its recovery more difficult. The purpose of thisgrinding action is to create bright surfaces upon the ma.-

terials to be recovered.

' These endless chainsare two or more in number and the sprockets about which they run are mounted upon shafts journaled within the frame structure. The power unit for operating the same may be mounted upon, the bed of the machine, or the same may be secured from some source outside; in that event a power shaft 30 isprovided having a pulley fly wheel 31 mounted thereupon; Mounted upon this shaft is a driving sprocke et with which chain, 32 is engaged and chain 32 also engages with a sprocket 33 mounted upon shaft 33 In machines of'the larger capacity I have found best resultsare obtained by these driving chains being of comparatively short lengths, for the wear tends to increase the length of the chain and defective driving is the. result in chains of long lengths; A second chain 33 imparts rotation to the sprocketilt mounted upon the shaft 34. Mounted upon the shaft 34: is a second sprocket driving chain 35 which imparts rotation to shaft 36,1nounting the sprockets for driving the drag chain20. The pillow block 37 supporting the bearings for the shaft36 is mounted upon the sloping bracket supports 39 and as the drag chain becomes loose from wear the chain is tightened by the application of pressure upon the screw 38 which is attached to the pillow block. The screw 38 is held in position by the bracket 39. The bars 21 serve also todrag the tailings from H10 machine up the incline tOand deposit the same in the tailing chute 41;

The'incoming materials to be treated in the machine are deposited'in a hopper .42

having a removable screen bottom 13.

A vanner like movement is imparted to the machine treating members and is. ac-

complished by an eccentric 44 mounted upon the main'drive shaft 30, an eccentric strap 4:5 is disposed about the eccentric and. im-

parts an oscillating:movememt to the con nect ng rod 46. The tank structure 1s sup-' ported :upcn axles J47 upon *whichitrunnion wheels 48 are nnounted. These. trunnion wheels 48 :are :mounted up on rtracks that Zdo not runtiparallel JWllIl'l the ibddy structure (of the :machine,ithis is Ihest shownjn @l1?ig.;11.

Thus 'when sin-oscillating movementiisjimparted -to thetankstructure ibythe eccentric airlaterahmotion :is imparteditoathertank by the action of the trunnion wheels-iuponithe tracks,".thus':avanner motioniis imparted to the tank structure. 7 1

Located near the discharge end of the machine is an ore valve made of the gate type sired opening of the valve may be obtained.

and as the material that has gravitated to the bottom and is not held in suspension 1n to the frame structure. Opposite the slotted end of the lever 49 is a right angle bend 49 that is adapted to engagement in asuitable hole in the rod 50. 'The rod 50 is pivoted about pin 51 and is attached to the slide, or gate valve at 53. The valve blade 54 has contact with the seat 55 for a suflicient dis.

tance to compensate forthe slot in the lever 49, and by theproper setting of the valve in relation to the location of the slot and the clamped position of the set screw 49 the de- At times it may become necessary. to provide for the manual manipulation of this valve; this is accomplished by the disengagement of the lever 49 and placing the same in the dotted .position as shown in Fig. 9. The rod 50 may'then be used as a hand lever and the same can then be operated at desired intervals. The deposited materials that drop through the valve opening are released into the chute 5 45 and from there deposited into desired receptacles.

The depth of the tank structure will depend upon the kind ofmaterials to be'treated and upon the character of treatment to be given, butI have here shown in' detail the character of machine that I have found most practical in the recovery of the precious metals having a relatively high specific gravity. a

Having thus described my invention I wish to makethe following claims therefor '1'. A machine for recovering precious metal concentrates, comprising a sectional frame, a flat bottomed tank mounted within the frame, means for imparting'a vanner action to the tank, triangular conduits arranged in substantially parallellines upon the bottom of the tank said triangular 'conduits adapted to discharge'liquid under pressure TEEBOID EHJGlIL-Si-ClB urea r the flour tot zth'e tank, means, for :aithnitt-ing-imateri'a'ls'zto'abe treated amotthe itank, 'ameans zrt'or grinding and polishing the materials awhile :Jbeing treated,ian. d= dischargingimeansifor the rtreated'imaterials. .1

12. .A- amahine- :for :recovering precious zmetal concentrates, comprising a ,iSGQtlOl'RTl frame, ::a flat "bottomed ztan'kunoimted within "the frame, means ifordmparting :a Wanner motion to the tank, triangular conduits arranged in substantially parallel lines upon the bottom of the tank said triangular conduits adapted to discharge liquid under pressure from each side near the floor of thetank, means. for admitting materials to be treated into 'the'tank, means for grinding and polishing the materials while being treated, and'jdischarging -me'ans for the treated materials.

8; A machine for, recovering precious metal concentrates,comprising a structural steel frame, a track supported within the 7 frame, trunnion wheels 'mounted on axles adapted to cooperate with the track, a tank structure,having a flat bottom, mounted on sand axles, meansv for imparting a' vanner movement to said tank, triangular conduits arranged in substantially parallel "lines upon the bottom of the tank, said triangular conduits adapted to discharge liquid:

under pressure from each side near the floor of the tank, endless chains adapted by means of cross bars, to drag the material to be treated, from the inlet end to the discharge end of the tank, flexibly connected drag bars carrying lug grinders attached to cross bars, lug grinders adapted to impart a grind :ing action on the material to be treated, means for removing the material of high specific gravity, and means for removing the .tailings. d

4. A machine for recovering precious metal concentrates, comprising [a frame structure, a tank structure adapted to malnframe and means forimparting a shaking motion to the tank structure, triangular shaped conduits arranged in parallel rows adjacent the inner bottom surface of the tain liquidtherein mounted within the r tank, endlessdrag chains, adapted't'o being" means for depositing screened materials to be treated within thetank, and means for removing the materials of high specific traversed the length of the tank and having transversely disposed cross bars attached thereto, flexibly connected drag bars carrying'lug grinders attached to'thecross'fl bars, said lugs. adapted to impart a grinding action to the ,material to. be treated,

gravity. in advance of the removal 'ofl'the tailings.

5.-A machine for recovering; precious metal concentrates comprising a frame, structure, a tank structure adapted toma n- 7 tion to the tank structure, triangular shaped conduits arranged in parallel rows adjacent the inner bottom surface of the tank, means for discharging Water under pressure from said triangular conduits, endless drag chainsadapted to being traversed the length of the tank and having transversely disposed cross bars attached thereto, flexibly connected drag bars attachedto the cross bars, lug grinders secured to said drag bars, and adapted to impart a grinding action on the material to be treated, means for clepositing screened materials to be treated Within the tank, and means for removing the materials of high specific gravity in advance of the removal of the tailings atone end of the tank.

' ADAM W. SEVERANCE.

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