US2700511A

US2700511A - Ore fiberizing machine

Info

Publication number: US2700511A
Application number: US292124A
Authority: US
Inventors: John J Denovan; Robert A Denovan
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-06-06
Filing date: 1952-06-06
Publication date: 1955-01-25
Anticipated expiration: 1972-01-25

Description

.Jan. 25, 1955 J.ZJ..DEN,OVAN ETAL 2,700,511

v ORE FIBERIZI-NG MACHINE Filed June 6, 1952 4 I 2 Sheets-Sheet 2 INVENTORSA UnitedStatcs, Patent Patented-1.1 elm-1.25 s 1955 1? 2* end .of thethub. .17.. 'The. driving. sheave is located outside the casmg. 1,. as. shown, .andis driven inany suitable man: 2700 ner.(not shown) Y Q. Mounted on the hub "for revolution therewith is a series ORE .MACHINEE:

101mg. .D'novannLachin'e, Quebec,..and Robert. A5. Denovan, .Montreal: West, Quebec, Canada;

This application relates to' ore,.androckjdisintegrating or fiberizing machines, and is a continuation-impart of application-SerialsNo. 204,034,-fi1ed: J anuary 2,.-195 l.

The invention is'particularly applicable to the treatment of asbestos oreforrelease of fibers therefrom, and has :for: its object the provision .of..a machine capable of increased output while releasing .fibers. from the,ore without appreciable destruction of such fibers. Anotherobject is to providea fiberizing machine which. is simple instructure and subject to convenient anddnexpensive-rmaint'enance. 1'

The invention contemplates thetprovision, inlisuchsa machine; of.,a-.plurality of series..oflbentrifugally,acting impactedevices or hammers of meansfo'r mounting-such hammers for convenient and rapid assembly in or disassembly from the machine, and of driving means associated with the mounting means for effective and troublefree operation of the machine.

The invention will be described with reference to the accompanying drawing, in which Figure 1 is a sectional elevation of a machine in accordance with the invention, and

Figure 2 is an enlarged sectional plan view of the machine.

In the drawing, 1 is a cylindrical casing having a top closure plate 2 and a conical bottom portion 3 leading to an axial discharge outlet 4.

The casing is lined with a plurality of superimposed

rings

5 and 6, each of which is preferably of segmental character for ease of manufacture, assembly and maintenance.

Rings

5 and 6 are of different structure, rings 5 constituting the lowermost, topmost, and each alternate ring, and rings 6 constituting the remaining alternate rings, in the lining.

The bottom or lowermost ring 5 is seated upon an annular flange 7 provided at the top of conical portion 3. Each ring 5 comprises a plurality of segments 5a, which may be bolted to the casing wall as shown. Each segment 5a carries substantially midway between its ends a radially inwardly directedy finger or baflle 8, one of the lateral faces of which is radially grooved at 9 to provide a generally concave surface. Preferably, the inner surfaces of the segments are downwardly inclined, as indicated at 10, to direct downwardly the material under treatment.

Each ring 6 is composed of a plurality of segments 6a bolted to the casing wall and having a serrated or sawtooth inner surface 11. The outer corners of each ring 5 are preferably recessed as indicated at 12 to receive annular shoulders 13 on each ring 6 and thus provide interlocking engagement therebetween.

Any desired number of

rings

5 and 6 may be employed. In the embodiment illustrated four rings 5 with three alternate rings 6 are provided. Each segmental ring described is shown as comprising eight segments, which has been found to be a satisfactory arrangement, but the number of segments and baflles 8 may be varied as required.

Extending axially through the casing is a stationary shaft 14, the lower end of which is supported in frame member 15, and the upper end of which is supported by a bracket 16. A tubular hub 17 is rotatably mounted on the shaft by means of a lower ball bearing assembly 18 and an upper ball bearing assembly 19. Bearing 18 is carried by housing 20 fixed to the hub and having sealing engagement with the end of the shaft by means of sealing ring 21. Bearing 19 is carried by housing 22 fixed to a 3 driving sheave 23, which in turn is bolted to the upper of. generally. radially...extendingjmpact. devicesv orihammers2'4',ftthe free :orh'outer. end portions of which .are. ar.. ranged-to. revolve'betweenthe upper: and adjacent series of .baffls. 8.. Also. mounted on the..hub for. revolution therewith are a plurality (two as shown)..iof seriesl'ofiradially. extending. hammers. 25,. .thef free. end portions of whiclriare. arranged to revolve between .each'lof. t'hremain: ingad acent series. of. baffles .8..I the number .of hame mersin xeachise'ri'e's. may. vary, sixhas .been 'foimdt'o. be. a satisfactory I number.

A. convenient. and preferred, means -.for mounting',each series of hammers=24and 25jon .the-Jhub .17.?comprisesa plurality ,(feur .asshown) {of radially'ljextending.:higSJfE and upper and lower annul'anpla'tes 27Cand.28',".each having a respective central. opening 2Ta"or'28a"of sufiicientldianu eter to-enable thev plate to be passed over the lugs';26.on.th'e hub... Eachl'plate' is provided with''a plurality of comple' mentary lugs .29l'extendin'g inwardly, from.v the .edge. of opening ,2721 and 2822. on. assembly, each' pair. of, plates 27 and 28' 'are. positioned with. each J pair .of theirllugs .29 in engagementlwitha"lug. 26' lyin'g therebetween and the lugs 29" are appropriately/fixed to lugs 26" as by. welding.

The inner. end of .eachha'mmer; .24. and 25 ispiyotally securedbetween .:a','respe ctive pairi.of plates. 27 and. 28 bymeans of a pin 30which'extends through the inner end of the hammer and registering openings 31 and 32 in the respective plates. Plate 27 is provided with a raised portion 33 extendind around each opening 31, such raised portion 33 being recessed at 34 on its inner edge to receive a laterally extending lug 35 constituting an offset head of each pin 30. The lower end of each pin 30 engages an annular flanged edge portion 36 of plate 28. The lower end of each pin is notched at 37 to receive a spring ring 38 which retains the pins in position. It will be obvious that the means for mounting the hammers, as described, permits convenient removal and replacement of the hammers. Preferably, as shown, the hammers 24 are somewhat heavier than hammers 25 and their radius of revolution is somewhat shorter than that of hammers 25. Each

hammer

24 and 25 has its lateral faces grooved as indicated at 39 and 40 to provide concave impact surfaces thereon.

Closure plate 2 is provided with an axially offset ore inlet chute 41, which as shown is located directly above tzlze path of movement of the impact surfaces of hammers Access to the interior of casing 1 is preferably provided by forming the front semi-cylindrical half of the casing as two doors 42 hinged at 43 to the semi cylindrical back half of the casing.

In operation, the hub 17 is driven to revolve the

hammers

24 and 25, centrifugal force normally maintaining the latter in radially extended position. However, due to the pivotal mounting of the hammers, they are free to swing out of such position should tramp objects, such as pieces of metal and the like, come into contact therewith. Ore is fed through inlet 41 directly into the path of the upper series of hammers 24 which, since they are heavier and revolve through a smaller orbit, have a lower velocity than that of hammers 25. Thus, their impact on the pieces of ore is less intense and, to a proportional degree, their damaging effect on the first release of fibers from the ore is less. It will be observed that the series of hammers 24 (as well as each series of hammers 25) is located laterally opposite a serrated liner ring 6, which cooperates with the hammers to release fibers from the ore.

It will be observed that the concave surfaces of the bafiles 7 face in a circumferential direction which is opposite to the direction of revolution of the

hammers

24 and 25. These surfaces are arranged to engage the pieces of ore following their impact with the hammers and thereby remove the rotational velocity therefrom prior to their engagement by the next succeeding series of hammers for more effective treatment thereby.

For the treatment of asbestos ore, the machine is normally run at 900 R. P.M. and the size of the feed ore is minus 2" mesh. Under these conditions, the impact of the hammers breaks the ore and releases the fibers without appreciable destruction, since there is no rubbing. The capacity of the machine varies with the material being processed and the input power. Under average conditions, the machine will handle 50 tons per hour of minus 2 mesh ore and require a power input of 200 hp.

The arrangement of a stationary shaft to carry the rotor permits theprovision of a rigid and fully protected bearing assembly. Moreover, the entire shaft assembly may be simply and easily removed if necessary.

What is claimed is:

1. A fiberizing machine comprising a generally vertically' disposed cylindrical casing, a driven cylindrical member axially mounted within the casing, a plurality of series of substantially horizontally disposed impact hammers pivotally carried by said driven member within the casing, and means for independently mounting each said series of hammers on said driven member comprising for each said series an upper and a lower annular plate fixed to the driven member, the inner ends of each said series of hammers being disposed between a respective pair of said plates, a pin extending through each hammer and pair of plates, means carried by the upper plate for locking the heads of said pins thereon, the lower end of each said pin having a notch therein below said lower plate, and a single spring ring engaging the notches in all the pins of one said series of hammers to releasably retain said pins in position.

2. A fiberizing machine as defined in claim 1, each said pin having a laterally extending head portion, and

... -2,7oo,a11

' said upper plate locking means comprising a raised portion on said plate partially surrounding each said head. portion to restrain movement thereof.

3. A fiberizing machine comprising a generally vertically disposed cylindrical casing, a driven cylindrical member axially mounted within the casing, a plurality of series of substantially horizontally disposed impact hammers, and means for independently mounting each said series of hammers on said cylindrical member comprising for each said series an upper and a lower annular plate, said member having a plurality of lugs extending radially between each said pair of plates, each said upper and lower plate having an axial opening through which said member extends and the edge of which is beyond the ends of said lugs to permit passage of the lugs therethrough, each said upper and lower plate also having a plurality of complementary lugs extending into said opening and engaging and fixed to said first lugs, the inner ends of said hammers being pivotally disposed between each said pair of plates.

References Cited in the file of this patent UNITED STATES PATENTS 248,923 DeChamp Nov. 1, 1881 1,212,419 Sturtevant Jan. 16, 1917 1,492,102 Nelson Apr. 29, 1924 1,636,033 Agnew July 19, 1927 1,669,239 Grindle May 8, 1928 1,798,465 Grindle Mar. 31, 1931 2,359,911 Grindle Oct. 10, 1944 2,360,086 Thurman Oct. 10, 1944 2,607,538 Larson Aug.'19, 1952