US1247633A - Ore-pulverizing mill. - Google Patents

Description

C. L. BUCKINGHAM, on: rul'vimzme mm. APPLICATION FILED MN- 30. WIT. 11 %Q'fl33 n Pwamwl Nov. 2?, 191?.

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ORE PULVERIZING MILL.

APPLICATION FILED mmao. Ian.

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Qpeoiflcatlonof Letters Patent.

Patented am. at, rear.

Application filed January 30, 1951?. serial Ito. mane.

Toall whomitmay concern:

Be it known that I, CHARLES L. Bocmnc- RAM, 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 Ore-Pulverizing Mill, of which the following is a specification.

My invention relates to im rovements in ore crushing, indin an pulverizing mills, and the ob ects o my invention are:

First, to provide an operative Chilianv mill in, which tired ore crushing rolls are provided with oppositely arranged trunnion shafts that are journaled in journal boxes positioned in semi-circular caslngs that surround the npper portion of the ore crushin rolls, and in which'said rolls are ushe around the ore crushing surfaces of t e mill and rest squarely on top of it and on the ore thereon.

Second, to provide a Chilian mill in which the rolls are pushed around upon a die rin and bear naturally and freely on it wit their whole weight, and in which a multiple number of rolls travel over irregular layers of ore on the die ring independently of each other. And

Third to provide a simple, practical and powerful ore pulverizing mill having numerous novelfeatures-that will be fully described in the accompanying specification.

Y I attain these ob ects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of the improved ore pulverizing mill.

Fig. 2 is a plan vlew thereof, the'feed hopper being removed.

Flg. 3 is a vertical sectional view of the same.

Fig. 4 is a front view of one of the roll housings or casings. a

Fig. 5 is a bottom plan view of the same. Fig. 6 is an end view thereof. Fig. 7' is a vertical, lon 'tudinal sectional view of one of the roller s slft journal boxes. Fig. 8 is an end view of the same. Fig. 9 is a vertical sectional view throu h a portion of the ore pan and one of t e screen frames, showing how the screen frame fits within an openin in the said ore pan, and the means for e amping thesame to said pan.

Fig. 10 is a perspective view of the launder with surrounds the lower end of the ore pan, in position to catch the screened products therefrom.

Fig. 11 is a side view of one of the halves of the launder, showing more clearly the manner of securing the parts to ether.

12 is a plan view of the cod hopper.

Fig. 13 is a view of a portion of one of spider arms.

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

Referring to the drawings:

The numeral 1 designates a hollow base that forms the foundation castin of my mill; 2' desi ates the ore crushing pan which comprises an outwardly flaring marginal wall extending around a raised central conical hub portion; 3 designates a housing band or casing that is connected to the upper edge of the pan and extends above it and is adapted to confine the ore to thepan; 4 designates the feed hopper, with three ore feeding spouts that centrally support it, as will be full explained hereinafter; 5 designates the ri'vlng shaft; 6 designates the power driven shaft. The ore crushing pan 1s provided with screens 7, which are secured over screen frames 8, having rectangular projections which fit into openings 9 in the wall of the pan, and the frames are clamped to the pan by wedges 10 that are driven into recessed lugs in plates 11, which are riveted to the pan between the adjacent ends of each two screens, the wedges hearing against the ends of the screen frames, and below these screens acircnlar launder 12 is secured, that surrounds the lower end of the pan and rests on the top of the base. This launder catches the screened product from the pan and discharges it through a spout from the machine, and it is conveyed to other machines for further treatment.

My improvedmill belongs to the type of ore crushing and pulverizing machines known in the mining industry as Ghilian mills, and some of the above enumerated parts are used in some form in the Chilian mills at present in use, and are consequently pafirltss that are used in all or most all Chilian m 1 My invention, however, contemplates new, novel and important improvements in the construction and arrangement of these parts and of the parts of them that coiiperate to make an operative Chilian mill.

In the bottom of the pan 2, a grinding or i 'die ring 13 is hardest steel this purpose. This die r 513 extends entirely around the bottom 0 t 5, thick enough to wear for a long t1me under the action of ore crushing rollers 14, WhlCh rest u on said die ring and are rolled aroun the pan by the vertical drlving shaft 5, as will be presently described.

The wall and conical portion of the pan are'surrounded' on each side .of the die mm by circular lining plates or rmgs 15 and 16 respectively, of steel or other su1table material, the upper edge of the r1ng 15 term1-. nating below the screen frame openmgs.

The ore receiving pan is secured to the base by bolts 17, and the screemn launder is referably made in two equa sectlons, which are bolted together around the bottom of the pan, and rest on a projectlng annular lip 18 of the base. The rolls 14 are of the tired type used in modern pract ce for crushing ore, and consist of cast 1ron or steel roll centers or disk portions, upon the periphery of which ore crushlng rmgs or tires 14 of the hardest steel are secured.

' The roll centers of the ore crushing rolls, of which there are three, are provided w1th axial bores, in each of which a shaft 19 is rigidly secured in any suitable manner. Each of these shafts projects from the o posite sides of its roll center far enoug to form trunnions 20 of equal length; The trunnions of each roller are mounted in 'ournal boxes 21, which are provided with rass bushings 22, which surround the trunnions 20. a

Each box 21 comprises a hub portion having an integral surroundingl projection 23, which is concentric with the u at its up er end, but merges into straight parallel s1 es, its lower end being a flat horizontal surface as clearly shown by Fig. 8. The surfaces of stantia y semi-circular in cross section, and are mounted in correspondingly shaped slideways 24, formed in projections 25, on opposite sides which fit'loosely over the upper halves of the rolls 14. One end of the inner side of each housing 26, is formed with a vertical late or flange 27, which is provided with olt holes 28, arranged as shown in Fig. 4;

the face of the flan e being at an inclination to the inner side 0 the housing. Upon the opposite end of the inner side of the housing is formed a hollow segmental extension 29, which is open at the bottom and arched over at the top thereof. The outer wall of this so extension terminates at its lower'edge in an outwardly projecting curved horizontal web or plate 30, which is integrally united with the adjacent end of the serves as a brace'for the said extension The free end of the extension and its Web terlaced which is made of the tainable, that is suitable for he pan, and is slmilar wear rojections 23, are roundedor subof semi-circular housings 26,

- In this way housing and thus minates in a vertical flange 31, which is rovided with belt holes 32, the latter flange in at an op osite inclination to that of the ange 27. llpon the inner wall of the extension 29, ad acent to its free end, is formed a U-sha ed projection 33, which surrounds an openmg 34, in the said wall, and a vertical aperture 35 is formed through the extension adjacent to its connection with the housing, through which a suitable scraper, not shown, is inserted.

An inwardly extending wing or plate 36, is formed-on the inner projectlon 25, of the housing, for a purpose to be presently shown. -When' the housings are laced in position over the rolls the flange 2 of each ousing, is bolted to the flange 31 of theadjo ning housing, as shown by Fig. 2, so that the three housings are rigidly secured to gether, and they are so arranged that their axes are out of radial lines with, or tangent to the axis of the vertical shaft 5, as shown, this arrangement tending to minimize the centrifugal force exerted upon the rolls. Upon the upper end of the shaft 5 is keyed a spider 37, comprising a hub from which projects. three curved arms. The outer ends of these arms have flange ortions 38, upon which are secured wear p ates 39 and the wings 36 on the housings are provided with lates 40.

The ends 0 the spider arms having the wear plates, bear against the wear plates of thesaid wings 40, so that when. the shaft 5 is rotated the housings are revolved thereby, through their engagement with the spider arms.

The U-shaped projections 33 on the housing extensions support the free ends of the depending spouts 41, which are integrally connected to the hopper 4, which is thus supported above the sad extensions and in axial line with the shaft 5. The spouts register with the holes 34 in the extensions, so that material fed to the hopper passes through the spouts 41 and holes 34 to the interior of the extensions and drops down upon the die rFings as will be understood by reference to The hopperis provided with a central tube or sleeve43, which extends above the rim of the said hopper, and through this sleeve is passed an 011 pipe 44, the lower end of which is screwed into the counterbored end of an axial oil hole 45 in the shaft 5, the said hole extending down below the upper end of the conical hub portion of the pan, and intersecting lateral holes 46, which extend through the periphery of the shaft.

oil is fed to the bore of the conical hub and around the shaft 5. The lower end of the shaft 5 is mounted in a bearing 47, on thebase 1, and a bevel gear Wheel 48 is keyed to the shaft, which is driven by a bevel, pinion 49,

memes and the holes 53 are provided with capped oil pipes 54, by which oil can be fed to the boxes.

In operation, the shaft'5iis rotated by its gear wheel 48, which is driven by the pin- 1011 49, on the power shaft 6, and the spider on the upper end of the shaft 5 engages and revolves the housings 26 in which are mounted the rolls 14: which travel on the die ring 7 13. Crushed ore and water is then fed to the hopper 4,. from which it passes out through the spouts 41' to the extensions 29 and down upon the die ring 13 and into the trough of the pan formed by the lining rings 15 and 16. As the rolls revolve the ore is finely pulverized and the pulverized ore and water passes out through the screens 7, the screened product being caught in launder 12,

' whence it is conveyed to other machines for further treatment.

The construction above described provides a mill of the Chilian type in which the rolls have double bearings in vertically adjustable journal boxes which are mounted in connectclaim as new and desire to d ll ed housings which are automatically raised and lowered to conform to the varying depths. of ore on the diering, andthe rolls bein independently adjustable are thus enable to rest squarely on the die ring at all times.

Having described my invention, what I secure by Letters Patent, is:

1. In an ore mill of the character described, the combination with a pan, a die rin therein and a shaft axially mounted in sai pan, of rolls adapted to run on said die ring, housings for said rolls having slidable bearings inwhich said rolls are mounted, arms connected with the shaft for rev'olvin said housings, and means for rotating said shaft.

'2. In an ore mill of the character described, the combination with a pan, a die ring in said pan and a shaft axially mounted in said pan, of rolls'adapted to run on said die ring, having trunnions, connected hous: ings for said rolls, and bearmgs slidably mounted in said housings in which said trunnions aremounted, arms connected with the shaft for revolving said housings, and means for rotating said shaft. 7

3. In an ore mill of the character described, the combination with a pan, a die ring therein and a power driven shaft axially mounted in said pan, ofrolls adapted to run on said die rings having trunnions, connected housings for said rolls having slideways, bearings mounted in said slideways in which said trunnions are mounted,

arms connected with the shaft for revolving said housings, said housin s bein vertically and automatically adjustaIile infependently of the said arms.

4. In an ore mill of the character described, the combination with a pan, a die ring therein and a power driven shaft axially mounted in said pan, of rolls adapted to run on said die ring having 'ournals, connected housings for said rolls avingvertically slidable journal boxes in which said journals are mounte and arms carried by said shaft and in slidable engagement with said housings for revolving them.

5. In an ore mill of the character described, the combination with a pan, a die ring therein, an axial shaft rotatably mounted in said pan and rolls adapted to run on said ring having journals extending from their opposite sides, of conneotedsemi-circular housings having slideways, automatically adjustable journal boxes in said slideways in which the roll journals are mounted,

a spider rigidly mounted on said shaft having portions which engage said housings, said housings being vertically and automatically adjustable independently of said spider, a hopper and spouts connecting the same with said housings and means for rotating said shaft.

.6. In an ore mill of the character de scribed, the combination with a pan, a die ring therein, a shaft axially mounted in said pan, androlls adapted to travel on said die ring, of connected semi-circular housings having slidable bearings in which said rolls are-mounted and feed apertures, abutments on said housings, a spider rigidly mounted on said shaft having portions which engage said abutments, a hopper having feed spouts connected with said feed apertures, said apertures bein arranged to discharge. in

advance of said rollers, and means for rotating said shaft.

7. In an ore mill of the character described, a pan having an axial shaft rotatably mounted therein, a die ring in said pan, rolls on said die ring having trunnions on their opposite sides, connected semi-circular housings having vertical slideways in their opposite walls, journal boxes on said trunnions which are mounted in said slideways wear plates on said housings, a hub rigidly mounted on said shaft having arms which engage said wearplates whereby said housings are revolved by but not connected with said shaft, and have a verticalmovement independently of said arms, and means for rotating said shaft.

8. In an ore mill ef the character described, a plurality of semi-circular housings, each having a hollow open bottom extension on one end which is bolted to the Mid Illft adjoining end of the next housing, said ontensions having feed openings and semicircular seats extending "from said openings, slideways in the opposite walls, of said hou ings, which extend througn their lower edges, rolls having trunnions, and hearing bones thereon which are mounted in said slideways, a die ring upon which said rolls travel, a pan supportin said die ring, a power driven shaft axial y mounted in said an, arms on said shaft unconnected with ut in engagement with said housings for revolving them, and a hopper having spouts,

the lower ends of which rest in said seats.v

9. In an ore mill of the character described, the combination with a pan, a die ring therein and a driving shaft axially mounted in said pan having arms extending from'its upper end, of semi-circular connected housings, slidable hearings in said housings, and rolls on said die rings having trunnions'mounted in said slidable bearings, and lates on said housings which are engaged by said arms, said arms being unconnected with said housings.

10. In an ore mill of the character described, the'combination with a pan having aeeaeae an axial rotatably mounted therein, a

die ring and rolls adapted to travel on saiddie having journals extending from their opposite sides, of semi-circular hone having depending spouts, the ends of w ich rest in said U-shaped projections and register with the said openings, a spider rigidly secured to said shaft and having portions which engage said housings, whereby when the shaft is rotated the housings with their rolls are caused to revolve, and means for rotating said shaft,

In testimon whereof I afiix my signature in presence 0 two Witnesses.

CHARLES L. BUCKINGHAM.

'Witnesses: 3

L; WQPARKER,

P. R. HAMMOND.

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