US1404982A - Combined crusher and mill - Google Patents

Description

H. LOEVEN.

COMBINED CRUSHER AND MILL.

APPLICATION FILED NOV. 16- 1920.

1 104,982, Patented Jan.r3l, 1922. v

6 SHEETS-SHEET I. "1 9 viz/Q INVENTOR J-fazrn-r boa r515 A TTORNEVS WITNESSES H. LOEVEN.

COMBINED CRUSHER AND MILL APPLICATION FILED NOV. 16, 1920.

1 104,982. Patented Jan. 31, 1922.

6 SHEETS-SHEET 2.

WIT/V5885 A TTORNE Y8 H. LOEVEN.

COMBINED CRUSHER AND MILL.

APPLICATION FILED NOV. 16, 1920.

1 ,404,982. Patented. Jan. 1922..

6 SHEETSSHEET 3.

. ,III; zifr. 9

Q o Q Q 0 n 0 o o o o o a 0 u o no lNg/VTUR 1, HARRY OZ. 102mg ATTORNEYS H. LOEVEN.

COMBINED CRUSHER AND MILL.

APPucATlogl FILED Nov 16.'192o.

1,404,9 2. Pate nted Jan. 1,1922.

6 SHEETS-SHEET 4.

IN VENTOR fin IF? r 4051 51! hrromvm H; LOEVEN'. COMBINED CRUSHER AND MILL. A'PPLICATYUN. FILED NOVKI 6, 1920.

1,41%},982, I Patented Jan. 31, 1922.

QSHEETS-SHEETB.

. 11v MENTOR l 3 l, OEK'I A TTOR/VEYS H. LOEVE N.

COMBINED CRUSHER AND MILL.

APPLICATION FILED NOV. 16. 1920.

1,404,9 Patented Jan;31,1922.

6 SHEETS-SHEET 6.

INVENTOR HARRY L oft 5A9 ATTORNEYS To all whom it may concern:

. liter tar ron vnm'ornonenas, naIzoNAI fcoivinmnncnusnna min mum.

Be it known that I, HARRY. LonvnN, a

citizen of'the United States and a resident of Douglas, in thecountyofcochi'se and State of Arizona, have inventedcertain new and I useful Improvements in 7 Combined.

Crushers and Mills, of Which the following is-a specification. I I I I My invention relates to mills, and a purpose of my invention is theprovisionof-a combined crusher and mill which ist constructed to automatically effect the return of over size ore to themillgso'as to cause a reductionof the ore to; the required I degree of, fineness in asingle contin'uousmperation.

It is also a purpose of my invention to provide a combined crusheijand mill including a; rotatable drum of-angular contour, anvils secured to the inner wall ofthe drum, andslu gs rotatable Within the drum, the drum providing, because of its contour, pockets in' its several corners in which finely I I milled ore accumulates at-"points out of tional view taken rea'chroflthe 'slugs, .whi1e the larger ore. or rockis continuously lifted by the breaker bars or anvils and precipitated; onto the slugs, By virtue of .this arrangement, the finely milled ore is prevented from retard- .ing the rotation ofthelslugs, thus leaving the latter free'to act upon ':the larger ore or rock in effecting a reduction of thelatter to the required degree of fineness;

.I" will describe I two. forms of combined crushers and mills embodyingmyinvention and will then-:point out the thereof in claims.

novel features In the accompanying drawings: I

fifFigure 1 is a View showing in rear elevation one form of combined crusher i and Figure 2 is a View showing in top plan the crusher and mill 'SllOWlllIl F igure, 1. J

Figure 3 is a vertical longitudinal secon' the line .373 of "Figure 4. I

I FigureA: is a transverse sectional view taken on thdine' ll of Figure-3.

Figure '5'is an enlarged detail perspective view of the removable section of the "drum in views.

of the crusherand mill shown in'the preced- *igures 6 and? are" detail perspective views of the slugs shown inFigure 3. I 7 Figures 8 and 9 are views sim lar to Figures3 and 4:, respectively,- shovvlng a modi- Specificationof liettei's' latent. rdfAl pl icationlfiled November 16,1920;

V lied forinioii drum-sections iii-applied p 1; I

t1on-W ithina mill of the sameconstruction 1:

as that shown in Figures 3 and l. o-y Figure 10 isan enlarged detail perspective Y Of ifi d iorm of drum'xsection' shown. in Figures 8* the screens removed. 1

tical section mg of the vib'rating' members :nd '29, with F certain of I I i Figurell isfa'idetailc viewshowing'in-ven I I "Referring specificallv tofthe drawings and I l particularly to Figures ,3f-and'4 1D efiecting a reduction oft-he same to the required degree of fineness. Ase-shown iii-Figure 3,;the drum as 'aunitismountedrfor r0? 'tation. upon-fa plurality of fla nge'd' rollers :15

v p r desigf nates generally-the drumhofthe combined crusher andniill into which ore or otherma terlalis adaptedito beiplaced and itreate'd in 'ivhichengage annular flanges16 formed'integralxivith or secured to the outer sides of heads 17 5and'18. The-heads'18 and417 con stitute the 'front and rear portions of :the drum D,While*the body ofthe drum is come posed {of appluralityof plates P, arranged and secured in the form of a rectangle with one of 3 their ends'secured to the front head their opposite ends are-secured to a' partit1on-2O.- As shovvn 1n 'F-1gure3, the partition 20 1 s arrangedmspaced relatlonto the rea'r 18 through the medium of'ribs 19,. While head 17 and is held such; position gby bars I 21' arranged in Cl1V8lg6IltEI'6littiOIl to "each 3 otherand eXtending'radially fr'omthe axis of .the'drum as. clearly shown in Figure 4.

The bars 121 coactfW-ith the rear head 17 and the partition 20 to provide a plurality of chutes designated at S for efiecting com munication be'tvveen'the interior of the drum divided by means of ribsQQfWhi'ch, as shown, I

in Figures'3 and4, extend.radially'fr'om the Q center of the rear headgl'7 Wltll their inner ends curved inwardly along the hubof the head. Theribs 22aredesi gned for thezpura pose of effecting 1 a uniform distribution r of described-.l1ereinafter. 1::

I As shown infFigure 4, 20fiis 'the ore into the drum asgvvlill be'morewfully r 100 and its periphery. ThechutesES are-sub- 1 provided at its center with an entrance pening which communicates with the several chutes S into which extend the ribs 2 2. This opening is surroundedby an annular guide flange 23 that IS curved 1n the manner shown 1n'F1gure3 so asto guide the ore lnto contact with the slugs in the drum as it passes through the entrance opening. It will be noted that the form of the guide flange 23 is such; as to effect a similar guiding of the ore from the interior of the drum into contact faces with breaker bars or anvils 24 which are in the formv of bars that extend longitudinally of the drum, as shown. Any number of anvils 2a may be provided, the purpose thereof being to effect alifting of rock ore' during the rotation thereof so as to precipitate the ore onto the slugs.

As shown in Figure 4, the body of the drum D is surrounded by a pair of circular screens E and E, such screens being spaced apart and arranged concentrically of each other with the inner screens E supported in spaced relation to the plates P by means of brackets'25. The screens E and E are made up of sections, each section extending from one radial bar 21 to the next bar 21. The several sections .of the outer screen E are secured at one end to an annular rib 26 secured to the front head 18, whilerthe opposite end is secured to a similar rib 27 secured to the rear head 17. One end of the screen E is likewise secured to a rib 28 carried by the front head 18, such rib coacting with the several brackets 25 for rigidly supporting the screen as a unit in spaced rela- 2 tion to the plates P.

As shown in Figure 3, the screen E is formed vof sheet metal which is provided with perforations having a diameter much less than the diameter of the perforations of the plates P. The screen E is formed of wire having a mesh which will allow of the free passage of thefinely divided ore therethrough. d I

For gaining access to the interior of the drum D for the purpose of inspecting and removing, if necessary, the parts of the mill contained therein should they become worn orbrokemone section of the drum including one plate, one section of thescreen E and one section of the screen E, is removable. This section of the drum is clearly shown in Figure 5 as well as in Figures 3 and 4:, and as here shown it comprises a pair of plates 29, a perforated plate P interposed between the two and secured at one end to one of the plates. The opposite end of the plate P is provided with a segmental flange 30 which is secured to guide blocks3l carried by the other plate 29 and arranged in divergent relation thereon as is clearly shown. The space between the flange 30 and the adjacent plate 29 constitutes a portion of a corresponding chute S sothat the ore between the plate P and the screens E and E hasv access between the chutes in effecting a return of the same to the interior of the drum. The plates 29 have secured thereto bars 32' which constitute handles for moving the section as a unitinto or out of position with respect to the drum, the section in applied their larger ends disposed adj acent the several chutes S sothat the space between the screens, as well as the space between the screen E and the plates P are all in communication with the outer ends of the chutes.

The screen E is adapted to be vibrated so as to insure the percolation of the ore therethrough by means of a plurality of plungers designated at Gr. and which are arranged at suitable intervals about the drum in the manner shown in Figure 3. As shown in Figure 11, each plunger G comprises a cylinder 33 having a reduced end portion which is threadedly fitted within the walls of a suitable opening formed in one of the plates P. Threadedly fitted in the opposite end of the cylinder 33 is a tubular sleeve 34. Slidably fitted within the casing 33 and the I sleeve 34 is a stem 35 made up of two sections which are. adjustable longitudinally with respect to each other I through I the medium of a threaded shank 36. The shank 36 is fixed to one of the sections of the stem 35, while the other section threadedly receives the shank so that it can be adjusted longitudinally thereon. The innermost section of the stem is provided with a head which engages the head of a plunger 37 that extends through. and beyond the inner surface of the plate P. The outer end of the screw threadedshank 36 carries a nut 38 which, when rotated in the proper direction,

will engage the outer section of the stem 35 to effect a longitudinal adjustment of the stem and to maintain such adjustment; A plurality of washers 39 are adapted to be placed upon the plungers 37 so that asthe cause the desired projection of the plunger beyond the'inner surface of the plate P. i

In the operation of any one plunger, the

ore within thedrum D striking against the plunger 37 effects outward movement-of the stem 35. During this movement of the stem 35 the shank 36 is caused to engage and vibrate. a band 40 secured to thescreen E whereby the vibration of the.- latter' is effected. The band serves to return the plungers to normalposition after the ore has disengaged'them. The adjustabilityof the stem 35 allows of the adjustability of the plunger as a unit so that the intensity of the vibra tion imparted to the screen can be increased or decreased at will. 3 y

' Referring again" to Figure 3, it will be seen that the drum D: together with the screens .13 and E" rotate about a common axis which in the present instance is a shaft T journaledi in standards4l. 'Theshaft T extends through an entrance opening formed in the front head 18 and throughwhich the.

ore to be milled is adapted to be introduced into the drum. bordered by an angular guide flange 42,

'which isdesigned for the purpose of'preventing the accidental ejection of. the" ore from the drum through the entrance-opening and for guiding the ore into engagement with the slugs. The slugs are designated at L and are here'shown as fixed totheishaft T, the latter being. surrounded by a projecting sleeve 43 so as'to prevent the ore from injuring the shaft. As shown in Figures 6 and 7, the slugsfLconsist of rectangular blocks-of metal that are adapted to be maintained in spaced relation upon the shaft T by means of spacing blocks 4-4. As shown in F igure6,'each slug L carries a block 45 which is, rotatably mounted thereon by means of a rod 46,the rod 46in the present inStanceeXtending through all of the slugs and through all oftheblocks- "It is to be noted that the blocks'are arranged adjacent one corner of the slugs so that they will coact with the slugs in effecting a disintegration'of the ore; In Figure 7, I have shown a slug L provided with a'block 47 which is rigidly secured to the slu I11 Figure 3, a plurality'of such blocks 4 are shown interposed between adjacent slugs. this'latter figure I have also shown the application of the blocks 46. Either or both can be used.

In Figure 12 'I have shown'another form of slug which may be used with or in place of the slug L; As here shown the'slug is designated at L and is of disc formation. Pivotally connected to the slug is a pair of links 53 between which is rotatably mounted a wheel 54.. During the rotation of the slug L, the wheel '54 is thrown out of the radial position shown and is adapted toswing about the inner ends ofthe links as a center This entrance opening is when contacting'with-the ore in-the drum" so as to effectahammering 'action upon the ore. v 1

In the operation ofv the drum and slugs, the former is adapted to'be driven inrthe same direction as the slugs but at a. speed less than that; offthe slugs. Any suitable a belt 49. A pair of shafts 50 and 51 carry certain of the fiangedwheels 15 and are adapted to b'e driven from the shaft T through the following mechanism: A pulley 52 is fixed tothe shaft T adjacent the pulley 4S, and trained about this pulley 52 is a belt 52*. pulley" 52 fixed toa shaft 52. Powerfrom thefshaft 52 is conveyed to the'shaft 51 through gears 52. l The. shaft '51 in turn drives the shaft 50 through belt connection shown. j 7

By this'arrangement it willbe seen'that with the shaft T rotating,the slugs carried by such shaft will be rotated at a corresponding speed, while through the me- The belt 52 is also trained about a s Fmd i dium' of the mechanism for driving the shafts 5O ancl51, the rotation of the drum is effected at a speed less'than that of the slugs. Y

described is as follows:

With the drum and slugs rapidly rotating, ore is introduced into the drumthrough the entrance opening in the vfront head 18 and The operation of'the crusher, and mill just.

upon suchintroductiom'the ore is carried upwardly by the anvils 24 where it is dropped onto the slugs L and the blocks 46 and 47.. Upon contacting with the slugs and blocks, the ore is jected against the. plates passing through "the perforations of the, plates and into the space'between the plates disinte rated and "pithe fine .ore

and the-screen From this poi'nt the ore passes throughthe screen Ea'nd. ultimately through thescreen E, the vibration of the latter insuring the passage of the same therethrough as had been'describe'd: That ore which is too large to vperc'olate the screens-E" is ultimately ejected from the large ends of thescreens into the chutes-S where it finally'returnsinto the drum. :This.v l

action is effected as a result'ofthe f'rusto-v conicalformation of'the screens, it being understood that ore is subjected to the'action of the centrifugal force created-bythe rotation of the drum and that such] force causes a longitudinal feeding of the are in the direction of the large ends of the screens.

' The large or over size ore which is re- I turned to the drum is again acted upon by the slugs, and this operation is repeated until i Y p the ore is reduced to: the required degree of to the interior of the drum.

fineness so that it will all percolate through the screens and thus exteriorly of the drum. As has been previously described, the flanges 23 and (t2 serve to guide the ore into-v contact with the slugs, which in conjunction with the lifting'actionof the anvils 24 effects complete disintegration of the ore. The anvils 24 also serve to prevent the ore from moving circumferentially of and in the same direction as the moving slugs thus allowing the latter to more frequently engage the ore, and preventing excessive wear of'the interior of thedrum.

By virtue of the angular formation of the drum, the finer particles of ore are caused to lodge inthe several corners of the drum and out of reach of the slugs so that the latter are free to act upon the large particles of ore.

Referring now to Figures 8, 9 and 10, I have here shown a mill of a construction identical to the construction of the mill shown in the preceding views withthe exception that sections of a different form are substituted forthe sections comprised in the drum D. In the present instance, the drum is composed of four separate and independent sections, each section comprising a frame F of rectangular form having at its inner end a perforated plate P; Spaced from the plate P and from each other are a plurality of screens designated at E E and E respectively. As clearly shown in 7 Figures 8 and 9, the screens E E and. E

are of a mesh which decreases in degree of fineness from the innermost screen to the outermost screen. One end of the plate 1? and the screens E E and E are spaced from the adjacent side of the frame, this space providing a passageway or chute through which the oversize ore may return This passageway is controlled by a door 55 so'mounted as to occupy an open position only when the section is in an upright horizontal position. Inward-swinging movement of the door is limited by means of a guard plate 56 secured to the inner side of the plate P, such guard plate also serving to prevent contact of the ore with the door and injury to the latter. I

As in the first form of my invention, one of the sections is removed so as to permit access to the interior of the drum when renewing worn Or broken parts. This removsideplates 29 adapted to fit between the front and rear heads 17 and 18 and to be supported by the divergent bars 21. The

ore to gravitate into vthe drum; With the 7 drum rotating, it will be clear that the several sections successively discharge the over size ore into the interior of the drum that ore which has been reduced to the required degree of fineness percolating all of the several screens and where it is finally ejected from the frames of the sections. By virtue of the fact that the several screens E, E and E are spaced apart from the plates P and from each other, the vdisintegrated ore after passing through the plates is agitated within the spaces between the plates and screens finally working its way "through the screens orpassing back into the drum.

It is to be particularly noted that the sections of the drum of both of the mills are interchangeable and that by employingthe sections shown in Figures 8 and 9, the several, chutes S are rendered inactive. In either form of crusher and 'mill suitable driving means (not shown)'may be provided for-revolving the slugs in, a direction opposite to the rotation of the drum.

Although I have herein shown and described only two forms of crusher and mill embodying my invention, it is to be understood that various changes and modifications may be made herein without departing from the spirit of theinvention and the spirit and scope of the appended claims.

\Vhat I claim is: v c

1. A combined crusher and mill comprising, a rotatable drum of angular, contour and formed of foraminous, material, said drum being formed at=its opposite endswith entrance openings, anvils extending longitudinally within the drum, guide flanges adj acent said openings, guide flanges surrounding the openings and extending into the drum, a plurality of screens of frustosaid screens and one of said openings, and

means for rotating said screens and drum.

2. A combined crusher and mill comprising a rotatable drum formed of foraminous material, screens of various mesh surrounding said drum, and adjustable means operable by the action of 'ore within the drum when the latter is rotated for vibrating th outermost screen.

3. A combined crusher and mill comprising, a rotatable drum of angular contour formed of sections, each section comprising a frame, aplurality of foraminous members In the operation of the second form ofwithin the frame spaced apart from each 125 a frame, a plurality of foraminous members:

' within the frame spaced apart from each other and from one end of the frame to provlde a passageway for efi'ecting communlcation with the interior of the drum, hinged doors for controlling said passage-way so mounted as tooccupy an open position only I when the corresponding section is in an upright horizontal position'and o'oacting grinding elements rotatable within the drum.

5. Acombined crusher and milleomp-rising a rotatable drum of angular contour and 1 composed of aplurality of separate and in- 7 dependent sections, each section comprising a frame, a plurality of foraminous members within the frame spaced apart from each other andfnom one end of the frame to pro vide a passageway for effecting communica tion with the interior of the drum, hinged doors for controlling said passageway so right horizontal positioinand guard-plates associated with said doors for controlling the inward swinging movement of the doors.

and preventing the ore within the drum from coming in contact with the doors and V coacting grinding elements rotatable with;

fHARRYIiOEVEN. r

in the drum.

30, mounted as to occupy an open position only when the corresponding sectlon is 1n an up

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