US1058953A

US1058953A - Tube-mill.

Info

Publication number: US1058953A
Application number: US74981813A
Authority: US
Inventors: William B Easton
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-02-21
Filing date: 1913-02-21
Publication date: 1913-04-15
Anticipated expiration: 1930-04-15

Description

B. EAS'ION. TUBE MILL. APPLICATION FILED T11R21, 191s.

Patented Apr. 15, 1913.

2 SHEETB-BHBET 1.

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TUBE MILL. APPLICATLON FILED 21, 1913.

1,058,953. Patented Apr'.-15, 1913.

2 SHEETS-HEIGHT 2.

WILLIAM B. jEASTON, OF CHICAGO, ILLINOIS.

Turn-MI L.

Specification of Letters Patent.

Patented Apr. 15, 1913.

Application filed February 21, 1913 Serial No. 749,818.

To all whom it may concern:

Be it known that I, WILLiAM B. E'ASTON, a citizen of the United States, and a resident of Illino1s, have invented a certain new and useful Improvement in Tube-Mills, of which the following is a specification:

This invention relates to machines for crushing ore and other materials, and relates particularly to the type of crushers known as tube mills.

As iswell known to persons familiar with the construction and operation of tube mills, said mills consist of a suitable metal shell rotatably mounted by means of trunnions through which the material to be treated, as

the more or less finely comminuted ore from stamp mills or the like, is adapted to .be fed as by a current of water introduced into said tube mill with the material to be treated therein. To provide for introducing ma I terial into said shell and discharging it therefrom,

through the supporting trunnion of saidshell. As is also well known, the grinding,

axial openings are formed crushing, or pulverizing of the ore is effected by means of a mass of loose stones introwill be carried partly up the side of said duced into the shell of the tube mill so as to fill the same almost half full. Thus, as the shell of the tube mill rotates, said-stones shell in the direction of rotation, and falling back, will operate to crush 'ore particles caught between contacting surfaces of said One object of the,invntion is to increase the capacity of tube mills by providing means for delivering the treated ore or other material to the discharge opening of said mill after it has passed through said mill and has been subjected to the grinding or pulverizing act-ion thereof. s

A further object of the invention is to provide a construction for the discharge end of tube mills whereby the oreor other material undergoing treatment therein can escape from the further action of the grinding or pulverizing. agencies of the tube mill when said material reaches the discharge end of said tube'mill, thus preventing long-com.

tinued action of the grinding or pulverizing devices on the ore at the discharge end of the mill, and resulting in a much more uniform product and a much smaller percentage of ore crushed finer than desired. of Chicago, in the county of Cook and State Still a further object of the invention is to provide'meansat the discharge end of the tube mill for regulating the time required for the ore undergoing treatment to pass through the crushing or pulverizing devices of said mill proper, that is, the time during whichthe ore passing through the mill will be'subjected to the action of the grinding devices, or in other words, to provide means for regulating the sizes of the particles of ore produced by the mill.

To effect the foregoing ends, a tube mill of my invention comprises the various features, combinations of features anddetails of construction hereinafter described and claimed.

-In the accompanying drawing, in which my invention is illustrated Figure 1 is a central sectional view of the discharge end of a tube mill embodying my invention; Fig. 2 is an end view of that part of the machine shown in Fig. 1, the head ofthe shell being broken away to expose the perforated plate through which the treated material is carried by the current of water; and Fig. 3

.is a fragmentary sectional plan view taken on the line 33 of Fig. 2, on an enlarged scale.

As my improvement relates only to the discharge end of the tube mill, and, as the general construction of such mills is generally Well known to persons familiar. with the art,

I have, in the drawings, shown only the discharge end of the mill, descriptionthereto.

Referring now to the drawing,.A designates the shell of the tube mill, A the head which closes the discharge end of said shell,

and will limit my formed on which is a trunnion A adapted to be mounted in a suit-able fixed bearing, not shown, in a familiar manner. The shell A is provided with ,a lining A of suitable refractory material, said lining being so constructed and arranged that'it may be readily imity to the shell A and which is provided with a central opening 2, the edges of which engage a groove 3 formed in a boss at the inner end of a ring 4 supported by means of a' suitableconnection with the head A of the tube mill substantially concentric with the trunnion A As shown, said ring 4 is supported by means of webs 5 formed integral with said ring and with said head A To provide for assembling the plate 1, said plate is preferably made in segments, each of which is supported by means of independent connection with the head A con- 1 sisting, as shown, of bolts 6, which extend through said perforated plate 1 and head A inserted over which are spacing sleeves 7 which define the'width of the space or chamber between said plate 1 and head A For reasons presently apparent, the ring 4 is substantially conical, the sides thereof converging outwardly, preferably on curved lines, as shown at 8, and supported within the trunnion A in such position that the bore thereof will register withithe bore of the ring 4 is a perforated pipe 9. As shown, said pipe 9 is supported within the trunnion A by meansof' wedge blocks 10 inserted between said pipe. and trunnion.

To provide for inserting the stones into the tube mill and to permit chip-s and other light objects which will float and which are ,too large to pass through the perforations in the plate 1,'to escape therefrom, the

opening through the ring 4 and pipe 9 is left open, and, to prevent the stones from working out of the mill through said opening, a screw or spiral llis formed on the lnner surface of said ring 4 and pipe 9,

which forms in efii'ecta screw conveyer, the

pitch of which is such that rotation of the millin the direction designed will operate to feed material through the opening in said ring 4 and pipe 9 into the shell A.

Thus, .the screw or spiral 11 being lefthanded, the tubemill will rotate in a'direction opposite to the movement of the handsof a clock.

Pivotally mounted in the space between the head A and the perforated plate 1 are series of vanes 12, the width of said vanes being slightly less thanthe width of the space or chamber in which they are mount-- ed, and the pivotal axesthereof extending substantially radially with reference to the axis-of the tube mill. As shown, the pivot "bearings for said vanes 12 are formed in

bosses

13 and 14 formed on opposite ends' of said vanes, and in corresponding bosses 15 formed on the webs 5 which connect the ring 4 with the head A of'the tube mill. Formed in said

bosses

13, 14 and 15 arerecessed bearings adapted to receive pivot pins 16'and 17, of which the pins 16 may be fitted to turn freely in the recesses'in both the

bosses

13 and 15, and the pivots 17 are formed at the inner ends of pins 18 secured in suitable holes formed through the shell of the tube mill:

When turned into the same plane, the

plate 1 into the space between the perforated plate and the head A and to raise the same, and that, as said vanes pass upward, the water and ore particles carried thereby will run off therefrom, and, falling upon the surface of the ring 4 and the webs 5, will be conducted into the discharge openingin the trunnion A whence they will drain outwardly in the usual man ner. In

order to retain the water and ore particles on the vanes 12', the front sides of said vanes are preferably provided with longitudinal ribs 19 comprising marginal ribs and any desired number of intermediate ribs, and are also provided with transverse ribs 20 fonnedsubstantially at their inner ends, and, if desired, at spaced points lengthwise thereof. Said ribs will operate, in an 0bvious manner, to retain the water on said vanes until said vanes are raised above a horizontal position.

With the described construction, itis also obvious that the feed of the vanes 12 may be varied by changing their pivotal adjustment, varying from a designed maximum when said vanes are in Iradial planes to practically nothing .when

they are turned into planes at right angles thereto. To provide for thus varying the feed of the vanes 12 which will regulate therate of flow and thus the current of water't'hrough the tub mill, means are preferably provided for adjusting said vanes 12 pivotally. As shown, said means consist of bolts 21 threaded throughthe head A of the tube mill, one for each vane 12, the inner ends of which are connected by links 22 with the vanes 12, said links being pivotally connected to said bolts 21 and to said vanes 12, whereby turning said bolts 21 in or out will operate, in an obvious manner, to swing said vanes 12 pivotally in the manner desired. Said "vanes are adapted to be locked in desired pivotal adjustment by means of lock nuts threaded to the bolts 21 and adapted to frictionally engage the head A.

A particular advantage of the adjusting means shown is that it is accesible for operation from the outside of the shell. And, while I consider the means shown as being preferable, I do not desire to limit myself thereto, as other means will suggest themselves to others skilled in the art. a

I do not desire to limit myself to the specific perforated plate shown, as my m- 13 vention contemplates the use of any desired form of plate which will define a space or chamber at the discharge end of the tube mill for the vanes 12, constructed and arranged to permit drainage into said chamber as by leaving a space between the pe- 'riphery of said plate and the shell of the port saidshell, one provided with an admis-.

sion opening, and the other with a discharge opening, of a perforated plate secured in said shell and which forms a chamber at the discharge end of said tube mill, "vanes pivotally mounted in said chamber, means for adjusting said vanes pivotally, and means for delivering the water and material raised by said vanes into the discharge opening from said tube mill, substantially as described.

2. In a tube mill, the combination with a shell and trunnions which rotatably sup port said shell, one provided with an admission opening and the other with a discharge opening, of a perforated plate secured in said shell and whih forms a chamber at the discharge end of said tube mill, vanes adjustably mounted in said chamber, means acessible for operation outside of the tube mill for adjusting said vanes, and means for delivering the water and material raised by said vanes into the discharge opening from said tube mill, substantially as described.

3. In a tube mill, the combination with a shell and trunnions which rotatably support said shell, oneprovided with an admission opening and the other with a discharge opening, of a perforated plate secured in said shell and which defines a chamber at.

the discharge end of said tube mill,vanes pivotally mounted in said chamber, ribs on the front sides of said vanes, means for ad justing said vanes pivotally, and means for delivering the water and material raised by said vanes into the discharge opening.- from said tube mill, substantially as described.

4. In a tube mill, the combination with a shell and trunnions which rotatably support said shell, one provided with an admission opening and the other with a discharge opening, of a perforated plate secured in said shell and which defines a chamber at the discharge end of said tube mill, vanes pivotally mounted in said chamber, longitudinal and transverse ribs on the front sides of said vanes, means for adjusting said vanes pivotally, and means for delivering the water and material raised by said vanes into the discharge opening from said tube mill, substantially as described.

5. In a tube mill, the combination with a shell and trunnions which rotatably sup port said shell, one provided with an admis sion opening and the other with a discharge opening, of a perforated plate secured in said shell and which forms a chamber at the discharge. end of said tube mill, vanes pivotally mounted in said chamber, means for adjusting said vanes pivot-ally comprising screws threaded through the head of said shell, and links'pivotally connected to said screws and to said vanes, and means for delivering the water and material raised by said vanes into the discharge opening from said tube mill, substantially as described.

6. In a tube mill, the combination with a shell and trunnions which rotatably support said shell, one provided with an admission opening and the other with a discharge opening, of a perforated plate secured in -said shell and which forms a chamber at the discharge end of said tube mill, vanes pivotally mounted in said chamber, means for adjusting said vanes pivotally, and means for delivering the water and material raised by said vanes into the discharge opening from said tube mill, said means comprising a substantially coneshaped ring, webs which connect said ring with the head of the tube mill at the discharge end thereof, said webs forming a fixed continuation of said pivoted vanes, the inclined surface of said ring converging outwardly into the mouth of the discharge opening of the tub mill, substantially as described.

7. In a tube mill, the combination with a shell and trunnions which rotatably support said shell, one provided with an admised and arranged to permit drainage into the chamber at the discharge end of said mill, vanes adjustably mounted in said chamber, means for adjusting saidvanes, and means for delivering the water and material raised by said vanes into the discharge opening from said tube m1ll, substantially as described. 4

In testimony that I claim the foregoing as my invention, 1 afiix my signature in the presence of two subscribmg' witnesses this 1st day of February 1913. I,

- WILLIAM B. EASTON.

Witnesses:

MARY H. BIXEL, F. O. STOCKING.