US413014A - Ore-mill - Google Patents

Description

(No Model.) 2 Sheets--Sheet 1. W. BAINBRIDGE.

ORE MILL.

No. 413,014. PatentedOct. 15, 1889.

| amen 1m 4 Q- IHJI fiw Whitman-ea 4 an M (No Model.) 2 Sheets-Sheet 2.

W. BAINBRIDGE.

ORE MILL.

Patented Oct. 15, 1889.

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FFICE.

W'ILLIAM BAINBRIDGE, OF OMAHA, NEBRASKA.

ORE-NULL.

SPECIFICATION forming part of Letters Patent No. 413,014, dated October 15, 1889. Application filed December 17, 1888. Serial No. 293,783. (No model) To all whom it may concern:

Be it known that I, WILLIAM BAINBRIDGE, a citizen of the United States, residing at Omaha, in the county of Douglas and State of Nebraska, have invented certain new and useful Improvements in Ore-Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in mills for the separation of ores, and has for its object to provide a simple, compact, and durable mill which will rapidly pulverize ores of high. or low grade that contain minerals of refractorynature.

A further object is to produce an ore-mill which will contain within itself means for effectually pulverizing, scourin g, and separating free mineral from the gangue, and, further, that will separate free mineral from the ore by amalgamation and concentrate the refractorymatter preparatory to treatment by the smelting process.

\Vith these objects in view my invention consists in certain features of construction and combination of parts that will. be hereinafter described, and pointed out in the claims.

Referring to the accompanying drawings, making part of this specification, Figure 1 is aside elevation of the ore mill; Fig. 2, a vertical section of the mechanism and supporting frame with the driving gear removed, showing the central spindle in perspective; Fig. 3, a fragmentary plan view of one of my scouring-disks on an enlarged scale; Fig; 4, a vertical section of my series of cone-disks, showing the spindle in perspective, but broken away to show the feather-key m; and Fig.5, a section of a portion of one of my sconring disks, showing the grooves on the upper and under surfaces.

A represents any suitable frame for the mill which supports the central vertical spin dle 3 and the vertical side shaft K. The latter is provided with two spur-pinions P and O, which engage a gear-rim d on the hopper C and the ge'anrims d on the conedisks 2 4 6. This shaft is further provided with a bevel-pinion K, which engages a bevel pinion K on horizontal pulley-shaft M, which shaft drives the spindle B by means of bevel-gears M and B both the shafts B and K being revolved in one direction by the pulley M Hopper G, which is a pug-mill shell, is centrally located with respect to spindle B and rests upon collar 1), but is not attached there-' to. The hopper is further provided with an external gear-rim cl, engaged by spur-pinion P and resting upon friction-wheels c, which afford support for the hopper. Hopper O is substantially cup-shaped, the side wall being flattened, as at c c, and the inner surfaces of said wall being composed of a series of spaced ribs or corrugations h, which are highest about midway between the bottom and the top of the hopper and tapering toward either end, as shown in Fig. 2.

lVithin the hopper O a grinding-shell C is located and keyed to revolve with the spindle B by means of spline m". The upper part of said grinding-shell'is allowed a vertical movement on shaft B to adjust itself to the amount of ore in the hopper, and consists of a crown-plate f, provided with a perforated hub e, which embraces the shaft B, said crownplate having an integral depending skirt f, that forms the grinding-face of the disk, as will be further explained in proper order. The skirt f is contracted from its top to the base or lower edge, producing a conical peripheral surface, the lower edge of this skirt resting upon the outer edge of the base-piece g, as shown in Fig. 2. The lower part of basepieee g has the shape of a double cone and is rigidly fastened to the central spindle B, thus insuring complete pulverization. of the ore. Grinding-diskG is also provided with external radial ribs or corrugations, V-shaped in cross-section,which cover the surface, having their maximum height at the top of the grinding-disk, tapering toward the bottom and center, and ending at hub c'.

In the bottom of the hopper C and near the hub c'orifices 7c are formed for the exit of the pulverized ore. As will be observed, the annular space afforded between the hopper wall and the skirt f diminishes from the top of the hopper to the orifices 7.1, which is essential to produce a gradual comminution of the ore fed into the hopper'through its open top.

Immediately below the hopper C an orcreceiving-pan or washer D, the dished por- Washer D is placed upon spindle B, which washer consists of a circular pan, the bottom of which is concentrically depressed near the peripheral upright wall of the pan, so as to reduce an annular chamber D the inner It will be noticed that the boss or hub B has its true cylindrical upper end seated within an annular groove b cut in the lower surface of a fixed collar b, and that it is of equal height with the outer peripheral Wall of the tion D being from its position adapted to receive the ground material that is discharged through the holes 70, formed in the base of the hopper O. A series of spaced discharge-holes k are formed around the vertical wall of the boss D through which the heavy concentrated mineral will be mechanically forced by action of a fixed scraper F, while the lighter liquid refuse or gangue is caused to flow over into the annular chamber D, from which it is removed by the siphon-tube F and discharged.

Beneath the washer D a series of depending scouring-disks 1 2 3 4; 5 6, all of hardened metal, are centered on the spindle B. upper disk 1 and each alternate disk 3 and 5 are perforated centrally and engaged by the feather-key m, which is extended down sufficiently to afford vertical play for the disks upon the spindle 13, while they are at the same time made to rotate with it. The conic disks 2 and 4 are interposed between the disks 1 and 3 and 3 and 5, which last is supported on the lower disk 6, that is rotatively sustained upon the spindle B by its contact with the sloping base of the collar 7, firmly secured to the spindle by a set-bolt or .other suitable means. Each of the alternate disks 1 3 5 are secured to rotate with the spindle B, as previously stated, while the other disks 2 4 6 are not so attached, but are loosely seated upon the washers n, which embrace the spindle and its feather-key, while the bore of the disks is of such relative diameter as to rotatively fit the circumference of the Washers n, and thus secure the disks from lateral play. The disks 2 8 at 5 U have radially-extending grooves 19 formed in their upper surfaces and have flat bottoms and flaring side Walls. These grooves are deep, narrow, and sharply defined near the orifices 0, through which they are fed, and they become shallower and broader as they diverge from the central spindle, and cease entirely at about two-thirds the distance from the same to the outer periphery, leaving the remaining portion. to serve a scouring-surface, as shown in Fig. 3. In the under side of disks 1 2 3 4 5, and radiating from their axes, are the recessed arched or concaved grooves q, haying sharply-defined openings at orifices 0 Th e and becoming shallower and wider toward the outer periphery, ceasing at about twothirds of the distance to the same, as in the case of the grooves in the upper side. The orifices 0 are arranged to register with the aperture k in the bottom of the washer-pan D.

The loose scouring-disks 2 4 6 are each furnished with an upwardly-curved peripheral edge, which by its form affords a gutter t for the reception of the pulverized matter which escapes from between the faces of the grinding conic disks, and a series of holes 19 are formed in each of these gutters for the discharge through them of the pulverized matter, and it will be seen that the edges of the other disks 1 3 5 do not extend to the channels formed by the disks 2 at 6.

On the peripheries of the conic disks 2 at 6 gear-teeth are cut of the same pitch, thus in effect forming'a composite gear-wheel, as the adjacent surfaces of these gear-rims have bearing contact with each other. These disks receive rotary motion independent of and in an opposite direction to the intermediate disks 1 3 5 by the engagement of their gearrims with the spur-pinion O and are separately movable to adjust themselves to the ore between them.

Fastened to the cog-rim of the lower conedisk (3 and adjusted to rotate with it is an inverted conical shell or receptacle G, centrally located on the shaft B and supported thereon by the hub 21 of the receptacle 1.

A scouring-disk G is superposed upon the sloping sides of the disk G, and is revolved with spindle B by means of the feather-key m, upon which it is vertically movable. The receptacle Gis provided with orifices 0", which are directly above the pan 1, which pan is similar in shape to the upper pan D.

The receptacle I is loosely mounted on the spindle B, and is supported and held stationary by 'means of the standards y, Which are secured to base of the frame A. The inner chamber or trough s of this receptacle I is provided with an orifice s, which may be opened and closed by any suitable means, such as slide .2. The outer annular recess or trough J has a series of pockets 1, provided with removable capsI". A spring-supported brush or weight L isattached to the under side of shell G in such a manner as to be dragged around in the trough J when the shell rotates and brush the scoured mineral into the pockets 1.

Having set forth the preferred manner of constructing my machine, I will now describe its operation.

The side shaft K and spindle B are both driven in unison in the same direction by the horizontal pulley-shaft M through the medium of bevel-gears K K and M B lVhile the spindle 15 rotates the various grindingcones and washing-pan in one direction, the side shaft K, by means of its pinions O and P,driv'es the hopper Oand conic disks 2 at 6 in the opposite direction, whereby the grinding and pulverizing action is set up. Then the machine is thus set in action, the ore is fed into the hopper O, and as it passes down between the grinding-shell O and the hopper it becomes gradually broken or pulverized and discharges through the orifices down into the dished portion D of the. rotary pan D. Here the heavier portions settle and issue through the openings 70 in the bottom of the dish, while the lighter portions are thrown over by the scraper into the annular recess D. As this pan revolves, the heavier por tions which pass through the openings k pass into the openings 0 and thence into the grooves of theconic disks, where they are further pulverized or scoured. In this sec- 0nd pulverizing and scouring operation the particles of free metal are triturated by the oppositely-revelving disks, which disks adjust themselves to the amount and fineness of the ore between them and discharge the whole into the inverted cone-receptacle G through the series of openings p in thebot tom of. the annular gutters t. These openings, being coincident in vertical series and traveling in such position with the conic disks 2 4 6, allow the discharged pulverized material to pass down directly through into the receptacle G. By giving the slots gradual diminishing depth and making the lower portion of the disks plane the material treated is reduced to an exceedingly fine condition before delivery into the receptacle below. The richer and heavier proportions of the pulverized ore, being delivered into the receptacle G just above the internal scouring-disk G, are still further scoured and ground by passing between these two parts. The inner disk G moves vertically upon the spindle I), yet by means of the feather-key m it is made to revolve with the spindle. This adjustment allows the lighter portions to pass over its upper surface, while the heavier particles pass between them, both products passing out through common openings 1' in the flattened bottom of the receptacle, and thence down into the dish 8 of the stationary receptacle I. This dish .9 has been first filled with mercury or sodium amalgam, which eliminates the metallic particles from the ore in the well-known manner and the amalgam so formed may be removed from time to time through the opening .9 in the bottom of the dish. The concentrates pass over the gently-sloping wall of the dish 3 into the annular recess J, where they are brushed by the pendent weight L into the ritfles or pockets I, and these pockets, being covered by removable caps I, may be emptied from time to time. The liquid gangue is siphoned off. Thus it will be observed that the ores may be by successive stages pulverized, scoured, and concentrated and the free me tallic particles amalgamated.

It will be apparent that either wet or dry ore may be passed through my machine, the siphons being provided for wet material.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. I11 an ore-pulverizing machine, the combination, with a hopper, of a grinding-disk composed of two sections, the uppersection having a rotary and a free vertical movement and the lower a rotary movement only, and mechanism to operate the hopper and grinding-disks in opposite directions, substantially as described.

2. In an ore pulverizing and concentrating machine, the combination, with a hopper, a vertically-reciprocating grinding -disk, and mechanism to rotate these parts oppositely, of a washer-pan that is rotated by the same spindle that revolves the grinding-disk and a fixed scraper, substantially as set forth.

3. In an ore pulverizing and concentrating machine, the combination, with a washer-pan and a fixed scraper, of a series of conic disks provided with grooves and arranged so that adjacent disks will rotate in opposite direc tions, substantially as set forth.

4. I11 an ore-pulverizing device, the combination, with a hopper having tapering grinding-ribs and an external gear-rim, of a grinding-disk having free vertical play and mechanism to revolve the grinding-disk andhopper in opposite directions, substantially as described.

5. In an ore-pulverizing machine, the combination, with a rotating hopper having a series of tapering grinding-ribs, of an inverted conical grinding-disk that has tapering ribs on its surface and is composed of two sections, one of. which has free vertical play, and mechanism to rotate the grinding-disk and hopper in opposite directions, in the manner and for the purpose described.

6. In an ore pulverizing and concentrating machine, the combination, with a hopper forming a portion of a pug-mill, a conical grinding-disk composed of two sections, one

vertically movable and the other fixed, and means to rotate the cylinder and hopper oppositely, of awashing or concentrating chamber located immediately below the hopper, having a dished bottom. and an integral annular outer chamber, and a scraper to remove the contents of the dished chamber, substantially as set forth.

7. In an ore pulverizing and concentrating machine, the combination of a primary reducing-mill, a concentrating-chamber, a series of oppositelyactuated scouring-disks, an amalgamating-chamber, all mounted on a common shaft, and a concentrating and set tling chamber with an operating mechanism which is adapted to rotate the mill and scouring-disks, substantially as set forth.

S. In an ore pulverizing and concentrating of scouring conic disks, and a lower receivingchamber, all mounted on the same spindle, and a driving mechanism which is adapted to rotate the mill and disks to afford grinding action in each independent of the other, substantially as set forth.

9. In an ore pulverizing and concentrating machine, the combination, with a milling device that operates on the crude ore and reduces it to powder, a receptacle located immediately below it, a series of conic grindingdisks, and an inverted conic disk located below and containing a corresponding plainfaced disk mounted to rotate with the spindle, of a rigid amalgamating-receptacle located below the latter, a spindle that supports the milling and concentrating devices, and mechanism adapted to afford rotary motion to the milling devices, substantially as set forth.

10. In an ore-pulverizing machine, the combination, with a cup-shaped hopper having a central boss perforated to receive a spindle and orifices near said boss for the passage of the ore, of a grinding-disk composed of two sections, the upper section capable of free vertical play and the lower having a rotary motion only, and mechanism to rotate the parts, substantially as described.

11. In an ore-grinding machine, a series of oppositely-actuated grinding-disks provided with a series of feed-orifices near the center, and grooves in the upper and lower surfaces of the disks, which grooves open into said feed-orifices and are deep near the center and become wide and shallow as they proceed from the center, ending before they reach the periphery, and mechanism for oppositely revolving said disks, substantially as described.

12. In an ore-grinding machine, a series of oppositely-actuated conical grinding-disks provided with a series of feed-orifices near the center which register with each other, the alternate disks extending beyond the inter mediate disks and forming gutters for the reception of the ores, in combination with mechanism for actuating the same, substantially as described.

13. In an ore-grinding machine, a series of oppositely-actuated grinding-disks provided with a series of feed-orifices near the center, and grooves in the upper and lower surfaces of said disks opening from said feed-orifices and extending toward the periphery, and mechanism for oppositely revolving the disks, substantially as described.

14. In an ore-grinding machine, a series of oppositelyactuated conical grindingdisks provided wit-l1 a series of feed-orifices near the center which register with each other, the alternate disks extending beyond the intermediate disks forming gutters and having teeth of the same pitch cut in their peripheries, thus forming a composite gear-wheel, and mechanism for oppositely revolving the disks, substantially as described.

15. In an ore-grinding machine, a series of oppositely-actuated grinding-disks provided with registering feed-orifices and grooves in the upper and lower surfaces, the alternate disks extending beyond the intermediate disks forming guttersand having teeth of the same pitch out in their peripheries, and mechanism for revolving the same in opposite directions, in the manner and for the purpose substantially as described.

16. In an ore-grinding machine, a series of oppositely-actuated conical disks, alternate disks being keyed to a central spindle, and intermediate disks extending beyond the others forming gutters, in the bottom of which are registering discharge-openings, in combination with an inverted conical shell whose outer periphery fits the outer periphery of the lower cone-disk and is fastened to and revolved by it, and an inner inverted cone-disk keyed to the central spindle, and mechanism for oppositely revolving the spindle and'intermediate disks, substantially as described.

17. In an ore-grinding machine, a series of grinding-disks alternately keyed to a central spindle, the intermediate disks being extended beyond the others, having teeth of the same pitch out in their peripheries, and with central perforations which fit collars on the central spindle to admit of independent rotation, in combination with said central spindle and collar and mechanism for oppositely revolving the disks, in the manner and for the purpose set forth.

18. In an ore-grinding machine, a series of oppositely-revolving grinding-disks, in combination with an inverted conical shell fitting the lower grinding-disk, and an inner inverted conical disk having vertical play and revolved in a direction opposite to that of the conical shell, and mechanism for oppositely revolving the inverted conical shell and conical disk, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM BAINBRID GE.

Witnesses:

THos. D. HALL, JOHN F. HAMMOND.

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