US1862889A - Pulverizing or crushing machine - Google Patents

Description

June 14, 1932.. En E. ELzl-:MEYER ET AL PULVERIZING OR CRUSHING MACHINE Filed Nov. 1o, 1930 Patented June i4, 1932 1,862,889

UNITED STATES PATENT OFFICE EDWIN E. ELZEMEYER AND HENRY C. GRIESEDIECK, OF WEBSTER GROVES, MISSOURI,

ASSIGNORS TO AMERCAN EULVEEIZ'ER COMPANY, OF ST. LOUIS, MSSOURI, A COR- PORATION OF MSSGUB- PULVEBIZING OR GRUSIIING MACHINE f Application filed November 10, 1930. Serial No. 494,661. i

This invention relates generally to pulbase-1nember1 for material-grinding co-opverizing or crushing machines and, more pareration with the hammers 6, is a concave or ticularly, to a certain new and useful imarcuate memberl 7, which, suitably pivoted, provenient in such machines of the rotary as at 8, to the central lower part of the re- .'5 hammer type. y spective side walls of the base 1', is, by means 85 Our invention has for its chief object the of an eccentrically rotatable bar 9 inter# provision, in a machine of the type stated, mediately supporting the concave 7, shiftable of means adapted for the removal from the swingably towards or from the shaft 3 for Y machine of such relatively uncrushable mapresentation of its upper and lower grinding 10 terial as hard ore, tramp iron, straw, paper, surfaces'lO, 11, respectively, more or less ec- Bo rags, dunnage, or the like, as may be mixed centrically to the path or revolution of the with the product to be crushed or ground, hammers 6, the grinding surface 10,we might such removal being effected by virtue Iof the add, being preferably, though not necessarelative differences in momentum of thev unrily, imperforate, for effective grinding ofthe crushable material with respect to the material, and the grinding surface 11 being 66 crushed material. apertured for passage of the ground or pulI And with the above and other objects in verized material therethrough. view, our invention resides in the novel fea- Provided in the upper casing-section 2 and tures of form, construction, arrangement, disposed peripherally to one side of the shaft and combination of parts hereinafter de- 3, is a suitable feed opening or hopper 12,the 70 scribed and set forth in the claims. lower wall 13 thereof being oliquely dis- In the accompanying draw1ng,- posed inwardly anddownwardly toward the Figure 1 is a longitudinal sectional view hammers 6 and terminating approximately of a pulverizing or crushing machine ernat the upper end of the concave 7 for guiding bodying our invention; and or feeding the material to be ground there- 75 Figure 2 is a fragmentary sectional view upon.r of the machine taken approximately along The material fed to the machine is ground, the line 2-2, Figure 1. i crushed, or pulverized between the hammers vReferring now more in detail and by ref- Gand concave 7, some of the ground material erence characters to the drawing, which ilescaping through theapertured grinding sur- 80 lustrates a preferred embodiment of our inface 11. A substantial part of the product of vention, we show a rotary hammer-mill of the machine will, however, by the co-operaconventional type, which, briefly, includes tion of the grinding media 6, 7, be discharged a base or lower casing-section 1 and a complefrom the end of the concave 7 in an initially mentary or upper-casing section 2 preferably horizontally tangential direction towards the B5 detachably mounted on the base 1, bearing opposing wall of the casing 1.

for rotation in the side walls of the casing, Obviously, such product of the machine is is the main shaft 3 of the machine, which supunsized, that is to say', it comprises a mixture ports a plurality of spiders 4 connected toof pulverulent material, uncrushable mategether adjacent the free ends of their several rial, and an Vamount of crushed, though not arms by a circumferential series of transpulverulent material. However,the substanversely disposed rods 5. Disposed on the tially horizontal movement of the unsized respective rods 5, are so-called ring-hammaterials allows the gravity separation theremers 6, each arranged not only .for revoluof according to the variant momentum of its tion in the kcasing 1,2. with the shaft 3, but several constituents, some of which will posalso and at the same time independently both sess a momentum sufficient to cause it to be axially rotatable about, and laterally shiftovercast upon, and for gravitational separaable or yieldable relatively to, its respective tion by, a positive separating or screening supporting axis or rod 5. means comprising, in the present instance, a

Disposed between the side walls of the plurality of spaced so-called grizzly bars 14 100 disposed longitudinally in the direction of movement of the material falling thereupon.

Preferably, the screening grid or bars 14 are disposed below the level of the concave 7 to allow for the drop in the path of the material discharged therefrom, and the ends of the bars 14 are spaced from the end of the concave 7 providing an opening 15 through which most, if not all, of the pulverulent material is discharged from the machine, the balance of the product falling or impinging upon the bars 14, which, selected in size and spacing suitably for the purpose, substantially effect gravity separation of the material, the crushed material passing between the bars 14 and thus out of the machine, and the uncrushed material being, as may be said, rejected and retained by the screen composed of the bars 14, such rejected material, however, by virtue of its residual momentum, partaking of a sliding movement on the bars 14, and from thence is overcast, or caused to pass, through an aperture 16 provided in the adjacent or facing wall 17 of the base-section 1 for lodgement and collection in a suitable lateral pocket or metal receptacle 18, so called by reason of the metallic nature of the material most likely to be found therein.

Inv actual practice, we might add, we prefer to make the wall 17 separable from the base section 1, and to integrally unite with said wall 17 the enclosing walls of the receptacle 18, the latter having preferably a sloping or inclined apertured upper wall normally closed by a hinged access door 19, and the door 19 and the receptacle-wall therebelow having suitable wearing plates or liners 20, 21. respectively.

Preferably, the wall 17 is provided with iianges 22 interfittina, and secured by fastening elements 23 to. the respective side walls of the base 1, and for supporting the grizzly bars 14, we prefer to provide the opposing side walls of the base 1 each with an inwardly extending lug or shelf 24, on which the grizzly rests. the end bars thereof being held on the shelf 24 by clamps-or-hook-bolts 25. The bars 14 of the grizzly are spaced by suitable washers 2G and the grizzly as a whole is tied together by bolts 27 in the conventional manner.

We are aware that the use of so-called tramp-iron poclrets is not new in the pulverizing art. but` so far as we are aware, such pockets have heretofore been disposed so as to readily fill with the crushable material as well as the tramp-iron, the latter, in many cases, being intended to be embedded in the crushable material in the pocket.

In our present invention, the metal collected in the pocket 18 is substantially free from either the pulveruluent or partially pulverized material, and this we accomplish by providing the grizzly bars 14 over which the non-crushable material slides by virtue of its momentum and is hence self-propelled for movement to a point suiciently remote from the hammers 6 to substantially effect, during such movement, the separation of the crushed or partially pulverized material from the uncrushable material.

It will be understood that, while not here specifically shown, the grizzly-bars 14 may be adapted for shiftable or vibratory movement, and that other changes and modifications in the form, construction, arrangement, and combination of the several parts of the machine may be made and substituted for those herein shown and described with-out departing from the nature and principle of our invention.

Having thus described our invention, what we claim and desire to secure by Letters Patent is:

1. In a machine of the class described, in combina-tion, a casing, rotary crushing means within the casing, and a screening grid disposed horizontally within the casing` below the path of and tangentially to said rotary means for separating material cast therefrom.

2. In a machine of the class described, in combination, a casing, rotary crushing means within the casing, separating means including a screening-grid disposed horizontally within the casing below the path of said r0- tary mea-ns for receiving material tangentially cast by said rotary crushing means, and a collecting chamber disposed laterally of the grid for receiving the rejects overcast from said separating means.

3. In a machine of the class described, in combination, a casing, rotary crushing means within the casing, separating means including members disposed tangentially from and adapted to receive material cast by said rotary crushing means, and collecting means adapted to receive the rejects overcast from said separating means.

4. In a machine combination, a casing, rotary crushing means within the casing, separating means including members dispos-ed in a plane tangential to and below, and adapted to receive material cast by, said rotary crushing means, and collecting means adapted to receive the rejects overcast from said separating means.

5. In a machine of the class described, iI1 combination, a casing, rotary crushing means within the casing, separating means tangentially spaced from said crushing means for reception of material cast therefrom, and means for collecting the rejects overcast from said separating means.

6. In a. machine of the class described, in combination, a casing, rotary crushing means within the casing, separating means tangentially spaced horizontally from said crushing means for reception of material cast thereof the class described., in

from, and means for collecting the rejects overcast from said separating means.

7. In a machine of the class described, in combination, a casing, rotary crushing means Within the casing, separat'ng means tangentially spaced from said crushing m-eans for reception of material horizontally cast therefrom, and means for collecting the rejects overcast from said separating means.

8. In a machine of the cla-ss described, in combination, a casing, rotary crushing means Within the casing, horizontally disposed separating means tangentially spaced from said crushing means for reception of material cast therefrom, and means for collecting the rejects overcast from said separating means.

9. In a machine of the class described, in combination, a casing, grinding media Within the casing, including rotary means adapted to cast its product in an initially horizontal tangential direction, separating means tangentially spaced from said crushing means for reception of material cast therefrom, and means for collecting the rejects overcast from said separating means.

10. In a machine of the class described, in

combination, a casing, grinding media disposed in the casing, said grinding media including rotary means adapted to cast its product in an initially horizontal direction, separating means tangentially spaced from said crushing means for reception of material cast therefrom, and means for collecting the rejects overcast from said sepa-rating means, said collecting means including a receptacle disposed eXteriorly said casing.

11. In a machine of the class described, in combination, a casing, grinding media disposed in the casing, said grinding media including rotary means adapted to cast its product tangentially toward a Wall of said casing, and separating means spaced tangentially from said rotary member and disposed adjacent said Wall of the casing for reception of material cast from said rotary member.

12. In a machine of the class described, in combination, a casing, grinding media disposed in the casing, said grinding media including rotary mea-ns adapted to cast its product tangentially toward a Wall of said casing, separating means spaced tangentially from said rotary member and disposed adjacent said Wall of the casing for reception of material cast from said rotary member, said Wall having an aperture aligned With said separating means, and collecting means adapted to receive material overcast from said separating means through said aperture.

13. In a machine of the class described, in combination, a casing, grinding media disposed in the casing, said grinding media including rotary means adapted to cast its product tangentially toward a Wall of said casing, separating means spaced tangentially from said rotary member and disposed adjacent said Wall of the casing for reception of material cast from said rotary member, said Wall being separable from said casing and having an aperture aligned with said separating means, means for detachably securing said vvall in said casing, and a receptacle presented exteriorly said Wall for collecting material overcast from said separating means.

14. In a machine of the class described, in combination, a casing, grinding media disposed in the casing, said grinding media including rotary means adapted to cast its product tangentially toward a Wall of said casing, separating means spaced tangentially from said rotary member and disposed adjacent said Wall of the casing for reception of material cast from said rotary member, and means for supporting said separating means in sai casing.

15. In a machine of the class described, in combination, a casing, a hammer mechanism in the casing, a grinding concave co-operable With the hammer mechanism for eifecting an initially horizontal discharge of the product thereof, screening means disposed in the path of said discharged product for effecting gravity separation thereof, and means for collecting the rejected material overcast from said screening means.

16. In a machine of combination, a casing, mechanism in the casing, co-operable with the hammer mechanism for effecting an intially horizontal discharge of the product thereof, screening means including spaced bars disposed tangentially to the hammer mechanism and longitudinally in the direction of movement of said discharged product for effecting gravity separation thereof, and a chamber disposed in lateral relation to said bars for collecting the re- 1joected material slidingly overcast from said ars.

17. Apparatus adapted for separating uncrushed material from crushed material in the product of a pulverizing machine, Which comprises, in combination, means including a rotary hammer mechanism and a co-operating grinding concave for imparting an initially horizontal movement to said product, screening means disposed tangentially to the hammer mechanism adapted to gravitationally receive said product for eecting separation thereof, said screening means being adapted to slidingly support the material rej ected thereby, whereby the latter may overtravel said screening means, and a chamber for collecting said overtraveled material.

In testimony whereof, We have signed our names to this specification.

EDWIN E. ELZEMEYER. HENRY C. GRIESEDIECK.

the class described, in a rotary hammer a grinding concave

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