US2108160A - Crushing mill - Google Patents

Description

Feb. 15, 193s.

w. A. BEAUDRY 2,108,150

CRUSHING MILL Filed Nov. 9, 1955 l -2 sheets-sheet 1 Inventor A fior nay w. A. ,BEAUDRY l CRUSHING MILL Filed NOV. 9, 1955 Peb. .15, 193s.

ow WV,

' Attdrney -Patented Feb. 15j, 1,9387

Application .November il, "i935, Seriell Nm 49,@45

(Cl. dit-ll) o improvements horizontal asis mechanism oy means onstant flow of Wet the full cade a novel ar Within the 'drum to control aterlals from the li/ly present invention relates t in crushing mills oi the rotary, type, having an axial feed of which a continuous or c is uniformly maintained at paclty oi' the mill; and l also provi rangement ot parts the discharge of pulverized m "l'iie mill of the pres illustrated in my pen ent invention is of that type ding application lor patent ser. No. 13,396, nieu Maren so, i935, and trie present invention involves im crease the eciency or mills of vthis dition to the :leed

i the rotary drum, and the harige at the eirlt end cans for preventing tire drum, as 'well durable the rotor movements which. in.-

' improvements, in ad auisro at the adit end o means for controlling disc of the drum; also includer in loss or waste of material from as means for rendering more which operates Within While the mill oi my signed for pulverlzing or pulp, it will be understood so he treated in this manner.

the wet pulp thus treated, partially preor mineral rock, together with fed to the drum of the d to a lneness suitable tor, and at the same classiiied at the discharge invention is especially olee in the forni oi vrettliat other materials pared rock-ore water to form the pulp is mill, and the ore is reduce for feed to a mineral s time the reduced ore is end of the drum. After the wet p the material is ilrst elevated and tlneny pera .perpendicular shower tary drum into thepath revolving bat, by means falling shower" or or violently tossed 11s of the drum. Both e bat against the material, and ed material against the flectlve in breaking up,

nlp is fed to the interior o the muted to m11 freely in A'veritnin the low-speed ro of a high-speed rotary or oi; `which the material in the screen is continuously ha against the encl the impact oi th the impact of the hatt Wall of the drum, are e crushing.r or pulverizing the material.

Means are provided whereby the` duced, material isfree fr discharge from the drum, while, the heavier or coarser materi restrained or. conned'in the drum until it vis l properly reduced for disc in the accompanying trated one exemplifying s ing the results above set derstood that changes and alteratio 55 made in the physical e harge from the drum.

drawings I have iliusture for accomplishfoxth, but it will be unbodiment of i'ny invenawaits carissimo william a. non', Welnee, tutti@ parting from the principles of the invention.

Figure 1 is a sldeelevation oi a crushing rnill l embodying my invention.

Figure 2 is a longitudinal vertical sectional View through the operating parts of the mill, the hase or foundation being omitted for convenience of illustration.

Figure 3 is a sectional detail in perspective of the rotary laat.

Figure Il a detail sectional view through the feed trough at line of Figure@ Figure ist is a detail, sectional View through the said trough support at line ilada of Fg ure i2.. f

Figure 5- is a detail perspective view ofthe leed trough. l)

The rotary drum, which .is or cylindrical strane and designated as El is provided with an external pear ring l2 that is engaged by a suitable comple l,

"i'lie smaller trunnion il, forming the intuire or j leed-.end oi 'the mili is journaled in hearing il Ymounted, on the frame-plate ill, 'which is also supported on a cross beam lil and the sills ill.

The Wet-pulp is ted to the intake end of the drum by means of an oscillating feed trough lil that is disposed at the longitudinal axis of the rotary drum, in slightly inclinedA position'. The

material is ted by gravity to the trough from an elevated hopper l5, and thejtrough is jolted and caused to reciprocate beneath the open mouth or lower end of the hopper so that the material may be fed in a constant and uniform stream through'the trough and deposited Within the ro-vv tary drum. The trough is supported with its delivery end within the intake trunnion, by means lof a pair of spaced webs it, it rigid with the frame plate l2 and located at opposite sides of the longitudinal axis ot" the drum, and the upper edges of these' webs terminate in guide tubes il which fornistationary supports 'for the side bars it.

These side bars i8 slide' or reciprocate in the tubular guides, and the slide bars are rgidlyconvnected to theexterior Vof the trough -by means or g perforated lugs I9, and lock nuts 20, the lugs being integral with the trough. The slightly inclined trough is reciprocated longitudinally of the drum, as by jolts, due to the successive actions oi' four cams 2| fashioned in suitable manner at the o uter end of the intake trunnion, which cams operate as the rotary ydrum revolves. 'I'hese cams co-act with a complementary cam bar or plunger 22, which has a cam-head 22 in engagement with the cams, and the plunger is supported beneath the trough, at its longitudinal center in a perforated ear or lug 24 rigid with the bottom of the trough, in such/manner that the plunger or bumper bar moves with the reciprocating trough.v y

At its outer end this cam-bar projects freely through a hole in the inner end of a rectangular yoke 25 rigidly supported between the two webs, I6 of the frame plate I 2, beneaththe trough, and

on the projected end of the bar, within the rec-` tangular yoke, is a washer 26 retained by a cotter pin 21. Between the inner end of the fixed or stationary yoke, an'd an adjustable washer 28 threaded on the cam bar, is interposed a spring 29 that is coiled about the cam bar, and this' spring which holds the cam head against the. cams, also provides resilient means for forcing the trough on its inner stroke inwardly of the trunnion after the camactionv has caused the outstroke of the trough.

lThe inner end of the yoke thus supports the cam bar, and the outer end of the yoke supports the free end of an adjusting bolt Alil alined' with the cambar, which bolt is threaded into the yoke and journalei as well as supported in a perforated lug 3| aimed with the lug 24 and integral with the underside of the trough. Be-

tween the journaled end ofthe bolt and the yoke an adjusting nut 32 is threaded, and a cushion washer or bumper 3l is also mounted on the bolt adjacent the lug 3|, and the bolt .is fashioned with a head 34 exterior of the lug Il.A By means of the boltwhich is adjustable with relation to the stationary yoke, and the'adjusting nut 22 on the bolt, the length of the stroke of the trough may be adjusted or varied to suit different conditions, and the movement of the trough maybe adjusted to prevent lost motion.

This reciprocating movementoi the trough dislodges the material from the superimposed hopper and the material is i'ed in a constant stream through the intake trunnion to the interior 'of the drum, where it is picked up, and dropped in a shower or screen by the successive buckets I5 lining the cylindrical portion of the rotary drum. At the inner end of the intake trunnion the head 3 oi' the drum is formed with an annular iisnge 38 which is countersunk at its `trunnion-side to guide the iniiowing material, and at the drumside of this ange the inner face of the head 3 is slightly dished for the purpose of guiding the falling material, or, screen, away from the intake trunnion.

The constant feed of -material maintains the level of the wet pulp at the line W- L in Figure 2, and the4 successive buckets 35 being submerged and passing through the pulp,'pick up the m'aterial and then drop the material in a shower or screen.

' In the path of the stream of falling material, which of course includes solids. is located a rotary batlocated in horizontal position above the waterlevel W L. As bestseen in'l'igure'a the rotary bat is of crucitorm shape in cross section and the four vanes are made up of pairs of angular plates 31 mounted rigidly on a central'bar Il,

with the outer edges o! the plates of a pair joined rigidly by longitudinally extending wearstrips or bars I9, d ovetailed at 40 to the adjoining edges of a pair of plates. This cruciiorm arrangement of the vanes provides exterior grooves in the bat that perform the 'functions of buck'ets to catch the falling material, and the ends oi' these grooves or buckets are closed by circular heads-4|, rigid with the vanes, to prevent displacement of the material from the ends of the buckets. y'I'he central bar 38 is provided withjournal ends 42 that project through the upper portions. of the hollow trunnions 5 and 3 from the interior of the drum, and these journal endsare sup-l ported in bearings 43 exterior of the drum bearings. The rotary bat, as illustrated, is located above the longitudinal axis o1' the rotary drum', and it is driven in suitable manner, at a speed greatly in excess of the rotary movement of the drum so that the successive -streams of material falling fromfthe topV of the low-speed drum will each be batted by a vane of the rotary batf. 'Ihe impact of the falling solids on the bat. may to some extent, break-up some ci'v the solids, but the main crushing action, or reduction o1' the solids takes place when the 'successive vanes of the rotating bat toss the solids laterally, across the interior of the drum, against the wall of the rotarydrum. Within the interior of the charge head 4 of the drum is xed a deflecting ng A44 attached to the inner face o f this head and arranged conhcentrically about the discharge trunnion with the inner periphery of the ring moving in a path above the periphery of one oi' the retaining heads of the rotaryv bat. Thus, as the d'eecting ring moves with the drum,l any material falling on the defiecting ring is guided or deflected onto the rotary bat. This ring also prevents splashing'of water through the outlet or discharge trunnionof the drum.

To control the outflow or discharge o! the wetpulp through the discharge trunnion I employ .a

circular bame plate 45, which is suspended loosely on one of the journal ends of the rotary bat within the defiecting ring 44 and located between the ring and the dischargeopening of the head 4. This 4is anon-rotary baille plate, and its lower end, which is submerged below the water line W L and below the lower 'part of the open discharge trunnion, is provided with a weighted portion 4l, that-maintains the baille plate in its suspended position on the journal ofthe rotary bat. In 'this position, the charge of material at the water'line through the pulp to discharge, indirectly, from the drum, under the plate and over the deiiecting ring into the discharge trunnion.

This arrangement oi' the badje plate and de ilecting ling causing an indirect discharge from the drum insures that the material crushed or pulvelized and floating at or nearthe water line.

' must -pass out underneath the bame plate, and all Having thus fully described my invent-ion, what baille plate prevents dis- .fdischarge trunnion, and the plate causes the wetl tary bat having trunnion, of a stationary baille plate mounted on I claim as new and desireto secure by Letters Patent iszv 1. In a crushing mill of the horizontal axis type.' the combination with a rotary drum having a discharge trunnion and a fluid level for wet pulp extending through the trunnion and a roa shaft extending through the the bat and said trunnion, a weighted lower portio said Journal between and said plate having submerged below the water level.

2. The combination with arotary drum having a discharge trunnion and a iluid level extending through the trunnion, a rotary bat in the drum. and a shaft therefore extending throughv the trunnion, of a deecting ring mounted in the drum concentric with the trunnion and partially submerged below the water level, aestationary baille plate mounted on the `journal within the` ring, and saidplate having a weighted lower por-- tion submerged below the water level.

Vrotary drum, of

:plates arranged in pairs,

3. The'- combination in a crushing mill of the horizontal axisv'type having tapering heads and trunnions therein. of an annular ilange surrounding the intake trunnion and adapted to deiiect falling material toward the center of the drum, an annular deilecting ring concentrated with the discharge trunnion and mounted on one of said bat mounted within the drum between said .flange and ring and a stationary baille plate vmounted between said ring land' discharge trunnion.

4. The combination in a crushing mili with a a. rotary bat therein, being of cruciform shape in cross section and comprising angular plates forming grooves', said the adjoiningedges of veach pair of plates having a wear-bar and means for fastening said bar to said adjoining edges, and said bat having circular heads at its opposite f ends forming end walls for the grooves.

A. BEAUDRY..

said bat

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