US1083400A - Lining for ball or pebble mills. - Google Patents

Description

H. A. HANSEN & `LM. scHMUEsE.

LINING FOB BALL 0B. PBBBLB MILLS.v I

APPLICATION YILED FEB. 1, 191,3. 1,083,400, Patented Jan.6,1914

2 SHEETS-HEEFT 1.

,M my ,q l I f d@ l* Q Ai m QA. .I Q i Q m' m /ww GWW H. A. HANSEN J. M. SCHMUESER.

LINING FOB BALL 0R PEBBLE MILLS.

APPLIOLTOI FILED PEB. l) 1913.

i Patented Jan. 6, 1914.

2 SHEETS-SHEET 2.

.United States, residing at the city UNITED srnfrnsrnirnnr ruiten.,`

HANS A. HAN-SEEN AND JOSEPH M. SCHMUESER, OF SMUGGLER, COLORADQ LINING FOR BALL OR PEBIBLE MILLS.

Specification of Letters Patent.

Patented Jan. 61,1914.A

T 0 all 'Lc/10m 'it may concern:

Be it known that we, HANS A. HANSEN- and JOSEPH M. SCHMUESER, citizens of th o Smuggler, county of San Miguel, and State of Colorado, have invented certain new and useful Improvements in Linings for Ball or Pebble Mills; and we do 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, reference being' had to the accompanying drawings, and to the letters and gures of reference marked thereon, which form a part of this specification.

Our invention relates to improvements in linings for ball or pebble mills and has for f one of its objects to provide units of such a character that it will be possible to speedily assemble the lining within a mill.

Another object is toprovide a construction in which the use of large numbers of bolts or screws for holding the lining in plac'e is rendered unnecessary.

A further object of the invention is to provide means, namely longitudinal ribs integral with the units, for preventing slippa'ge of thepebbles or'balls upon the lining, thtis prolonging the life of the lining, preventing iiattening of the pebbles or`balls and avoiding waste of power.

Other objects of the invention will appear hereinafter as' we proceed with the description of that embodiment, which forthe purposes of the present application, we have illustrated in the accompanying drawings, in which:`

Figure 1 is a central longitudinal sectional view of a mill provided with our improved lining. Fig. 2 is a view in detail of one of the units of our lining. Fig. 3 is a similar View of another unit. Figi/1 is a similar view of still another unit. Fig. 5 isA a plan vie'vsr in detail of the door lining. Fig. 6 is a cross section taken upon the line 6-6, Fig. l, and looking in the direction of the arrow., Figs. 7, 8, and 9 are detail views of the different' units of a modified form of lining.

Fig. 10 is a detail view of two units of a modification in which each sidev edge is beveled in two different direct-ions.

The same reference characters refer to like'parts throughout the views. v

In the drawings, which .form a part of this specification the numbers 5, 6 and v7 parts, respectively, of the casing of a pebble or ball mill. The casing is supported upon and secured to hol-low trunnions 8 and' 9 which have collars 10 and 11, fixed thereupon to cooperate with the journals (not shown) for preventing longitudinal movement thereon.

' rEhe casing is first provided with a number of strips of belting 12 up'on the inside,- and running completely around the casing. After the belting 12 has been secured in place, ce-

ment 13 is spread over the remaining' exn'posed parts of the casing on the inside, the thickness of the cement layerlb'eing the same as that of the belting.

A hollow en'd support 14 is nextinserted within the trunnion` 9, theshoulder 15 on' said support abutting against the shoulder 16 upon the trunnion, thus preventing the support from bein moved outwardly. The' support 14 has a at wall 17 which acts` as an abutment for the outer extremities of the lining units 18. These' units are made concave-convex, their outer surfaces being of a curvature similar to that of the casing against which they rest. The side edges 19 of these units are inclined towardthe middle in planes which if extended would include the axis of the mill. K

Two of the units, namely 18a and 18b have their adjacent edges beveled ofi' inwardly and away from each other as at- 20 and 21 (see Fig. 6)'. When the other units" have been set in place a unit 18 isv inserted be'- tween the units 18u and 18" vand is caused to exert a we'dging' action against'both of the latter, the u'nit 18C'b'e'ing drawn outwardly in assembling the parts by mea-ns of a nut 22 upon a screw bolt 23, the' head of which is mounted in the unit 18c the n'ut 22v bearing upon the exterior surface of .the casing* whereby the unit 18c is secured to the casing. 'It will apparent that the1unitf18c acts as a lrey to hold all of the other' units in position, the units 18 beingv formed and `,arranged like the stones in a masonry arch, their contacting radial edges preventing" the movement of any unit toward the middle of the" mill. Each of the units 18, 18, 18"' and 18, is provided along one edge' .with an integral inwardly extending rib' 27, designed to' catchthe balls or pebbles as they' are thrown a aiist the linjinlg, during the ,peration o' the mill and t u's overcome slip'- page.

refer to the two conoidal and the cylindrical In the preferred form of our invention each of the ribs 27 is located upon one edge casing and a lining piece 24 with ribs upon its inner face constituting continuations of the ribs upon the units which are cut away as aforesaid is fastened to the door by means fao of a screw bolt,25 passed .through an opening 26 in the door lining piece.

The lining for the cylindrical portion 6 of the casing is next put in place, this lining element consisting of units 28 having ribs 29 of the same cross sectional proportions as the ribs 26 and forming continuations of the latter when the lining is assembled. Locking units similar to the units 18a, 18", and 18, are employed but they have not been illustrated in detail as their construction is precisely analogous to that of the similar units of the 18 group. With the wedgin unit, we may use a bolt fastening 22, 23, utl in the preferred form we omit this as unnecessary.

The lining for the portion 5 of the casing is now assembled. It consists of units 30 having ribs 31, the units being locked in place by means similar to those for the units 18 and 28, a yscrew bolt 32 and a nut 33 being employed for drawing the Wedge unit into place. When the latter is set, the beveled end edges together with the beveled end edges of the units 18, overhang the end edges of the units 28 holding each of the latter including the wedging `unit, in place. These end edges are forced 1nto close union and are held there by small wooden or steel wedges 34, which are driven in between the outer extremities of the units 30 and the adjoining wall of an end supporting collar 35 which is held in position by screws 36 or other suitable fastenings, but if desired, all fastenings for the collar 35 may be omitted, the wedging action being suicient to hold it in place.

The mill may be revolved in any suitable manner as by means of a gear wheel 37, fastened by means of bolts 38 to a coneshaped collar 39 secured upon the trunnion 8 and to the casing 5.

Although we prefer that the ribs upon the lining units shall be located at one edge thereof as shown in Figs. 1, 2, 3, 4 and 6, we do not desire to be limited to this construction, as numerous other arrangements may be used as for instance, the ribs may be located inthe middle of the units as illustrated in Figs. 7, 8`and 9. Furthermore, nu-

merous forms of interlocking edges may be employed if desired. In Fig. 10, we have illustrated one such arrangement one edge of each unitbeing divided into two oppositely inclined portions 40 and 41 while the corresponding portions of the opposite edge are inclined oppositely as at 42 and 43, the inclined surfaces 40 and 42 being parallel and the inclined surfaces 41 and 43 being parallel. It will be. evident that when such units are assembled no one of them can move -in a direction perpendicular to 1ts surface by reason of the fact that it will be overlapped, on a portion of each side edge by the units adjacent thereto.

The materials of which our lining units mayl be constructed are more or less numerous, but we suggest that chilled cast iron, chrome steel, manganese steel,I white or gray or hematite iron will be found satisfactory.

In view of the foregoing disclosure, it is believed that the method of assembling and putting into operation our improved lining will be obvious without further explanation.

We claim as our invention:

l. In a ball or pebble mill, a casing symmetrically arranged' with respect to all planes assing through its axis and a lining of har material composed of units held in place by wedging action, each of the sald units having integral therewith an inwardly extending rib arranged longitudinally of the mill, said rib being located upon one edge of the unit the vside edges of said units being formed to lie in planes through the axis of the mill when the units are assembled, means inserted between two of said units for retaining the units in close engagement with each other, said last named means being secured to the casing.

2. In a ball or pebble mill, a casing formed of two coneshaped portions arranged with their bases toward each other and a cylindrical portion interposed therebetween, a lining of hard material composed of concavo-convex units substantially triangular in shape and adapted to be held in position in the coneshaped portions of the casing by one wedge in each cone, concavocnvex lining units, substantially rectangular in shape and adapted to be held in place in the cylindrical portion` of the casing by one wedge and overhanging extremities upon certain of the triangular shaped units for retaining in place the last named wedge.

3. In a ball or pebble mill, a casing formed of two coneshaped portions arranged with their bases toward each other and a cylindrical portion interposed therebetween, 'a lining of hard material composed of concave-convex units substantially triangular in shape and adapted to be held in position in the coneshaped portions of the casing by one wedge in each cone, concavoconvex lining units, substantially rectangular in shape and adapted to be held in place vtures in presence of two Witnesses. in the cylindrical portion of the casing by HANS A. HANSEN. one Wedge the adJacent extremltles of the 5 triangular and rectangular units being bev- JOSEPH M" SCHMUESER' eled to t each other and the resulting plane Witnesses: of juncture overhanging the rectangular AU LIGNBERG,

units whereby theyare locked in place. y E. B. ADAMS.

In testimony whereof We ax our signa-

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