US3452938A - Jaw-type crusher - Google Patents

Jaw-type crusher Download PDF

Info

Publication number
US3452938A
US3452938A US458071A US3452938DA US3452938A US 3452938 A US3452938 A US 3452938A US 458071 A US458071 A US 458071A US 3452938D A US3452938D A US 3452938DA US 3452938 A US3452938 A US 3452938A
Authority
US
United States
Prior art keywords
jaws
jaw
crushing
chamber
crushing chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US458071A
Other languages
English (en)
Inventor
Stanley D Michaelson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kennecott Corp
Original Assignee
Kennecott Copper Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kennecott Copper Corp filed Critical Kennecott Copper Corp
Application granted granted Critical
Publication of US3452938A publication Critical patent/US3452938A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B02C1/02—Jaw crushers or pulverisers
    • B02C1/06—Jaw crushers or pulverisers with double-acting jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B02C1/02—Jaw crushers or pulverisers

Definitions

  • the bottom of the crushing chamber is partially closed by material supporting and screening means, so that material to be crushed travels along such partially closed bottom and crushed fines are sized and fall from the crushing chamber substantially as they are formed and have no opportunity to choke the discharge opening at the discharge end of the chamber.
  • the jaws and their axes can be inclined from the vertical within the meaning of the term substantially vertical, so long as there is sizing and gravity discharge of most of the crushed fines by and through the partially closed bottom.
  • This invention relates to jaw-type crushers for use in effecting size reduction or comminution of ore, rock, and other materials and is particularly concerned with providing a jaw-type crusher capable of at least, and usually greater than, the normal throughput and performance, without requiring the head room or the massive and relatively costly foundations and/or supporting structures needed by other crushers of jaw type currently in common use.
  • Conventional jaw crushers are provided with at least one movable jaw that is suspended from a horizontal shaft and is usually eccentrically mounted.
  • the jaw oscillates or reciprocates about a horizontal axis and, together with a fixed jaw or another movable jaw, provides a downwardly convergent, crushing chamber.
  • the material to be crushed is introduced into the wide upper end of such chamber and emerges from the relatively narrow lower end, passing through the chamber by the force of gravity while being crushed by the oscillating or reciprocating action of the one jaw relative to the other or of both jaws relative to each other.
  • the gape, i.e. width, of the relatively narrow discharge opening at the lower end of the chamber and the frequency and amplitude of the motion of the jaw or jaws govern the amount of material that can be crushed and its size after crushing. If the material is to be finely crushed, the crushing chamber must be long and the discharge opening therefrom small in comparison to what is permissible for coarse crushing.
  • the jaws and other parts of the crusher which are subject to impact and abrasion or other wear from the material to be crushed, are usually protected by replaceable castings, fabrications, curved or straight jaw plates, side plates, sheets and the like.
  • a high clearance (headroom) is required for the placement of a conventional jaw crusher, to allow the jaws to be vertically mounted or inclined steeply with respect to horizontal axes and to provide space for the necessary structure used for feeding material to and carrying it away from the jaws.
  • the necessary headroom is not ordinarily available or economically practical to Patented July 1, 1969 obtain.
  • jaw-type crushers it has not normally been practical to use jaw-type crushers at such places as the bottoms of shafts and stopes or in drifts and other passageways or rooms in underground mines, even though this would be highly desirable.
  • a conventional jaw crusher has a tendency to become choked when fed at or near its maximum capacity. It also has a tendency to become choked in most fine-crushing applications, even under the best of conditions, because of the convergent nature of the crushing chamber from feed end to discharge end thereof. Also, with most materials to be crushed, the throughput capacity of an ordinary jaw crusher is considerably limited by reason of the accumulation of fines as the material is progressively crushed in its passage through the chamber be tween the jaws.
  • Principal objects of the present invention are, therefore, to provide a jaw crusher that can be placed and can satisfactorily operate within a restricted area so far as headroom is concerned; one that does not require an excessively heavy foundation or supporting base; and one that substantially eliminates the problem of choking.
  • the jaws of the crusher are mounted on substantially vertical axes so the relatively wide feed opening and the relatively narrow discharge opening of the crushing chamber between the jaws, which openings in the usual jaw-type crusher are horizontally disposed, are here substantially vertically disposed, with the longitudinal openings of such crushing chamber being substantially horizontally disposed and open at the top and the bottom of the crushing chamber, instead of vertically disposed laterally of the chamber and closed by vertical members as in the usual type of jaw crusher.
  • the bottom of the crushing chamber is essentially open and converges from the feed end to the discharge end thereof, as does the chamber itself.
  • this bottom opening is provided with material-supporting means which partially close it and serve as a screen for passing from the chamber by gravity such fines as may be introduced with the feed material and also a good part of the fines produced by the crushing operation as the material travels along the length of the chamber.
  • material-supporting means which partially close it and serve as a screen for passing from the chamber by gravity such fines as may be introduced with the feed material and also a good part of the fines produced by the crushing operation as the material travels along the length of the chamber.
  • the material-supporting means may be and preferably is in most instances an elongate and tapered platform converging from feed end to discharge end of the crushing chamber, but being narrower in width than the open bottom of such chamber and being centrally located between the crushing jaws, all in accordance with desired screening characteristics.
  • Such platform is preferably reciprocatable and transversely stepped in formation along its length and in the direction of material travel through the crushing chamber, so as to itself function as the means for feeding such material through the crushing chamber.
  • a hopper for feeding the material to be crushed onto a platform section in advance of the feed opening of the crushing chamber, and, desirably, particularly for the smaller size crushers, the hopper itself is reciprocatable and the platform is rigidly attached to such hopper for simultaneous reciprocation therewith. If the aforesaid platform section is fabricated as a grizzly or other type of screen, desirable advance screening of the feed material is effected.
  • a single power unit can be employed to drive such movable jaws, or separate, preferably synchronized power units can be employed.
  • maximum effectiveness is obtained when the reciprocating means is synchronized with the crushing action of the jaws such that a forward thrust will move the material being crushed into and through the crushing chamber at the same time the jaws are being moved apart to the maximum opening.
  • Excellent results can also be obtained by conveying the material into and through the crushing chamber at high speed. This tends to crowd and push the material into and through the chamber.
  • FIG. 1 is a top plan view of one form of the jaw crusher of the invention
  • FIG. 2 a side elevation
  • FIG. 3 a vertical section taken on the line 33 of FIG. 1;
  • FIG. 4 a horizontal section taken on the line 4-4 of FIG. 2;
  • FIG. 5 an end elevation
  • FIG. 6 a top plan view of a somewhat different embodiment of the invention.
  • FIG. 7 a fragmentary vertical section taken on the line 77 of FIG. 6 to show the different form of materialsupporting structure used for this embodiment of the invention
  • FIGS. 8, 9, and 10 views corresponding to FIG. 7, but showing other forms of the material supporting structure.
  • the crusher includes a pair of movable, convergent, crushing jaws 11 and 12 and a feed hopper 13, all supported on a frame 14.
  • the jaws include straight plates 11a and 12a at their working faces, curved plates could be used as well.
  • feed hopper 13 could be mounted on a separate frame, if desired.
  • the crushing jaws 11 and 12 of this embodiment are mounted on vertical axes, as contrasted with the mounting of the jaws of a conventional jaw crusher on horizontal axes.
  • such jaws 11 and 12 define a relatively wide and vertically disposed material-feed opening A, FIG. 4, at the set of ends facing the feed hopper 13; a relatively narrow and vertically disposed, material-discharge opening B at the opposite set of ends remote from the feed hopper; and convergent, longitudinal openings horizontally disposed at top and bottom of the crushing chamber C formed between the jaws.
  • the convergent, longitudinal, bottom opening D serves the very important function of discharging fines from the crushing chamber C as the material moves longitudinally therethrough from feed opening A to discharge opening B.
  • material supporting means to be hereinafter described which, in effect serves a screening function, permitting only the fines to progressively discharge and retaining the relatively coarse material for continued exposure to the crushing action of the jaws, and which is also advantageously motivated to force travel of the feed material from feed end A to discharge end B of the crushing chamber.
  • the crushing jaws on vertical axes requires the least headroom for the crusher and takes maximum advantage of the force of gravity for the screening function. Nevertheless, minimum headroom may not always be a factor or the most important factor. It may be desirable to utilize the force of gravity to cause some or even all the travel of the feed material from feed end to discharge end of the crushing chamber.
  • substantially vertical as used to describe the mounting axes of the jaws is intended to include rather wide deviations from the true vertical, so long as the force of gravity is operable to pass fines from the crushing chamber through the longitudinal bottom opening thereof during travel of the feed material from the feed end to the discharge end of the chamber.
  • Crushing jaws 11 and 12 are eccentrically driven. For this purpose, they are rotatably mounted at corresponding ends on eccentrics 15 and 16, respectively, FIG. 4, which are fixed on shafts l7 and 18. Each of such shafts is journaled and supported by a set of bearings 19 and 20, FIG. 2.
  • Drive sprockets 21 and 22 are fixed to shafts 17 and 18, respectively, and are driven simultaneously in opposite directions by any suitable drive arrangement, for example the one shown which is described hereinafter.
  • jaws 11 and 12 are provided with grooves 23, FIG. 4, which each receive an end of one of a pair of toggles 24 as a pivot.
  • the other ends of the toggles are positioned as pivots in similar grooves 25 formed in support blocks 26 that are carried by frame 14.
  • Sprockets 21 and 22 are driven by a motor 30, through a drive arrangement that includes pulleys 31 and 32, belt 33, countershaft and sprocket 34, FIG. 2, endless chain 36, and idler sprocket 37, FIG. 1. Operation of the motor drives chain 36 to rotate sprocket 21 counterclockwise and sprocket 22 clockwise so that the jaws move toward and away from each other synchronously, with a longitudinal component toward the discharge opening B when the jaws are moving toward each other, which tends to push the feed material toward and through such discharge opening.
  • Jaws 11 and 12 are respectively cantilevered outwardly from eccentrics 15 and 16 and are further supported by toggles 23 and springs 27.
  • Flanges 38 and 39 extend outwardly from the jaws above and below the toggles to prevent the ends of the jaws dropping away from the toggles. It is apparent that additional frame structure can be built near to and above or below the ends of the jaws if deemed desirable, and that suspension or flexible compressive means, such as springs, hydraulic supports, or resilient shear mountings, can be employed to assist in the support of the jaws whenever additional support is required. In the case of small machines or of larger machines of light construction operating on soft material, such additional support will not generally be necessary.
  • Material to be crushed is charged into hopper 13 in any convenient manner, and, by reason of reciprocating motion applied to such hopper, is passed through hopperdischarge opening 40, FIG. 3, onto a platform extension 41 of the hopper bottom, which may be an imperforate plate or a screen of some kind, such as the illustrated grizzly, or a combination of both, closed laterally by extensions 42 of the side walls of the hopper.
  • Material small enough to fall through the openings of the grizzly drops to a chute 43 for transfer to a collection pile or to a conveyance, such as an ore car or truck. Where headroom is a problem, the chute can be replaced by a conveyor passed directly underneath the grizzly.
  • the coarser material that does not pass through the grizzly is fed into the crushing chamber C between jaws 11 and 12 by way of feed opening A.
  • the bars of the grizzly should either be parallel or diverge slightly as they extend toward the crushing chamber. Ordinarily, they should not converge.
  • the material-supporting means partially closing the longitudinal bottom opening D of the crushing chamber is an elongate platform member 44, FIGS. 1 and 4, fixed to and projecting forwardly from grizzly 41 to define relatively narrow, elongate, screening openings D and D Being rigid with reciprocating hopper 13, this platform member also serves as means for feeding or at least for aiding passage of the coarser material through the crushing chamber, where it is exposed to the crushing action of the jaws 11 and 12.
  • material-supporting platform member 44, FIG. 1 is preferably transversely stepped along its length, as at 44a, b, c, and d, with the individual steps being inclined upwardly, see FIG. 3, to better force the material along.
  • drive means are provided in the form of a motor 50, FIGS. 3 and 4, connected by belt 51, pulleys 52 and 53, and a crank 54 to one end of a drive rod 55.
  • the opposite end of such drive rod 55 is pivotally attached to a shaft 56, FIG. 4, which is rigidly secured to rearward extensions 41a of individual grizzly bars that extend back under the bottom of the hopper and are welded thereto.
  • Hopper 13 is resiliently supported by frame 14 to permit the reciprocative movement imparted to it by drive rod 55 and to induce a vertical component into such reciprocative movement.
  • the hopper is provided with a rearwardly-extending, rigid frame made up of side members 57 and end member 58, the side members being rigidly connected, as by welding, to depending portions (not shown) of the side walls of the hopper.
  • Suspension springs 59 and 60 serve to connect frame end member 58 with a structural angle 61 interconnecting respective posts 62 that rise rigidly from frame 14, the attachments of such springs to the angle being preferably by means of bolts, as indicated, to permit adjustment in spring tension.
  • a stifliy resilient suspension element 63, FIGS. 3 and 4, such as a piece of resilient material like rubber or rubber conveyor belting, connects frame end member 58 with an intermediate frame member 64 to further support the hopper, and a similar suspension element 65 supports the forward end of stepped platform member 44 directly on frame 14.
  • the combined weight of the hopper 13 and material supporting means 41 and 44 is further distributed to frame 14 through stub members 66, FIGS. 2 and 4, projecting rigidly from opposite sides of the hopper and resting on coil springs 67 that, in turn, rest on stringers 68 superimposed on frame 14.
  • the stringers 68 also serve to support the crushing jaws 11 and 12 by reason of the fact that the lower bearings 20 of the respective sets of bearings 19, 20 for the shafts 17 and 18 rest directly on such stringers, see FIG. 2, the upper bearings 19 being carried by a bridge 69 having legs 70 resting directly on frame 14. It should also be noted that springs 27 at the forward ends of the jaws are fastened to frame 14 through posts 71 rising from stringers 68.
  • the material passes therefrom and along the platform formed by grizzly 42 and stepped extension 44 much as it would on a shaker conveyor.
  • material small enough to fall between the bars of the grizzly drops onto inclined chute 43, from where it slides to an awaiting receiver, such as an ore car, truck, or storage pile or bin.
  • the remainder of the material passes through the crushing chamber C toward the end B thereof and is subjected to the crushing action of jaws 11 and 12, with fines being discharged progressively through the screening openings D1 and D2-
  • the platform extension 44 can also be of grizzly formation, as shown at 72 in the embodiment of FIGS. 6 and 7.
  • motors 77 and 78 have their drive pulleys 79 and 80 connected by belts 81 and 82 to pulleys 83 and 84 that correspond to the sprockets 21 and 22 of the embodiment of FIGS. 1-5.
  • Motors 77 and 78 may be electrically or mechanically timed in conjunction with the drive motor used to reciprocate the material-supporting means such that forward reciprocation of the latter will feed material into the crushing chamber at the same time the crushing jaws are opened to their maximum.
  • a drive motor for the jaws can also be mechanically connected to reciprocate the feed hopper and material supporting means, so that a separate motor is not needed for the latter purpose.
  • a reciprocating hopper it may be desirable in some instances to make the hopper stationary, with the material merely sliding onto materialsupporting means constructed as a conveyor to carry the material into and through the crushing chamber.
  • the bottom of the feed hopper may itself be perforated or have elongate openings formed therein to screen out fines in advance of or in place of the grizzly.
  • a jaw-type crusher comprising cooperatively opposed crushing jaws mounted on substantially vertical axes as lateral walls of a crushing chamber, said jaws converging from a relatively wide feed opening at one end of said chamber to a relatively narrow discharge opening at the opposite end of said chamber, said chamber having an open bottom that also converges from said feed opening to said discharge opening and provides for gravity discharge of crushed material during travel of material through said chamber, at least one of said jaws being eccentrically mounted for material-crushing movement toward and away from the other jaw; material-supporting and sizing means partially closing said bottom of the crushing chamber to limit the maximum piece size of material that can discharge from said chamber through said open bottom thereof; means supporting said jaws; and means for operating the said at least one of said jaws.
  • a jaw-type crusher according to claim 1 wherein both the jaws are movable in cooperative crushing relationship.
  • a jaw-type crusher according to claim 1 further including means for forcing travel of material longitudinally of the crushing chamber.
  • a jaw-type crusher according to claim 1 further including means for feeding material into and longitudinally through said crushing chamber.
  • a jaw-type crusher comprising cooperatively opposed crushing jaws, at least one of which is mounted for movement toward and away from the other, said jaws being positioned and spaced relative to each other to define a crushing chamber therebetween open at its ends for the feed and discharge of material, respectively, and with its bottom downwardly directed, the open ends of said chamber being substantially in horizontal alignment such that material can discharge from said bottom under the influence of gravity; material supporting and screen ing means across the bottom of said chamber for passing relatively fine material and retaining relatively coarse material, and means for operating the said at least one of the jaws.
  • a jaw-type crusher in accordance with claim 15, wherein the means for forcing travel of material comprises means for motivating the screening means.
  • a jaw-type crusher comprising cooperatively opposed crushing jaws; means mounting at least one of said jaws for movement toward and away from the other, said jaws being positioned and spaced relative to each other to define a crushing chamber therebetween open at its ends for the feed and discharge of material, respectively, and open along at least one of its lateral sides; said jaws and said chamber being off-vertical, so that the said open lateral side is directed downwardly as a bottom for said chamber; and material-supporting screening means positioned across said downwardly directed bottom for supporting relatively coarse material within said chamber while permitting relatively fine material to fall therefrom tthrough said screen.
  • a jaw-type crusher according to claim 17, wherein the material-supporting screening means comprises a tapered platform positioned substantially centrally of the open bottom of the crushing chamber, and wherein means are provided for vibrating said platform as a conveyor for forcing travel of material through said crushing chamber toward the discharge end thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US458071A 1965-05-24 1965-05-24 Jaw-type crusher Expired - Lifetime US3452938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45807165A 1965-05-24 1965-05-24

Publications (1)

Publication Number Publication Date
US3452938A true US3452938A (en) 1969-07-01

Family

ID=23819235

Family Applications (1)

Application Number Title Priority Date Filing Date
US458071A Expired - Lifetime US3452938A (en) 1965-05-24 1965-05-24 Jaw-type crusher

Country Status (9)

Country Link
US (1) US3452938A (da)
CH (1) CH456315A (da)
DE (1) DE1507767B (da)
ES (1) ES327611A1 (da)
FI (1) FI47283C (da)
GB (1) GB1119154A (da)
IL (1) IL25815A (da)
NO (1) NO122216B (da)
SE (1) SE347879B (da)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556415A (en) * 1968-07-12 1971-01-19 Envirotech Corp Jaw crusher and method of operation thereof
CN103381380A (zh) * 2013-07-19 2013-11-06 芜湖鑫泰铜业有限公司 全自动铜渣破碎筛分机
CN107744856A (zh) * 2017-11-03 2018-03-02 贾杨博 一种农用高效玉米破碎装置
CN115430502A (zh) * 2022-08-05 2022-12-06 山东兴达化工有限公司 一种氰尿酸生产用湿式球磨装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294972A (da) *
DE1013248B (de) * 1953-11-23 1957-08-08 Bochumer Eisen Heintzmann Anordnung an Foerdermitteln fuer den Abtransport von Kohle, Erz u. dgl. von der Gewinnungsstelle
DE1100431B (de) * 1957-08-26 1961-02-23 Gewerk Eisenhuette Westfalia Brecheinrichtung fuer Streb- und/oder Streckenfoerderer
DE1109986B (de) * 1958-12-24 1961-06-29 Gewerk Eisenhuette Westfalia Brecheinrichtung
US2999651A (en) * 1958-07-11 1961-09-12 Mining Res Corp Single stage rock crusher
DE1134873B (de) * 1959-04-28 1962-08-16 Bochumer Eisen Heintzmann Vorrichtung zum Zerkleinern von Kohle im Bereich einer Foerdereinrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294972A (da) *
DE1013248B (de) * 1953-11-23 1957-08-08 Bochumer Eisen Heintzmann Anordnung an Foerdermitteln fuer den Abtransport von Kohle, Erz u. dgl. von der Gewinnungsstelle
DE1100431B (de) * 1957-08-26 1961-02-23 Gewerk Eisenhuette Westfalia Brecheinrichtung fuer Streb- und/oder Streckenfoerderer
US2999651A (en) * 1958-07-11 1961-09-12 Mining Res Corp Single stage rock crusher
DE1109986B (de) * 1958-12-24 1961-06-29 Gewerk Eisenhuette Westfalia Brecheinrichtung
DE1134873B (de) * 1959-04-28 1962-08-16 Bochumer Eisen Heintzmann Vorrichtung zum Zerkleinern von Kohle im Bereich einer Foerdereinrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556415A (en) * 1968-07-12 1971-01-19 Envirotech Corp Jaw crusher and method of operation thereof
CN103381380A (zh) * 2013-07-19 2013-11-06 芜湖鑫泰铜业有限公司 全自动铜渣破碎筛分机
CN107744856A (zh) * 2017-11-03 2018-03-02 贾杨博 一种农用高效玉米破碎装置
CN115430502A (zh) * 2022-08-05 2022-12-06 山东兴达化工有限公司 一种氰尿酸生产用湿式球磨装置
CN115430502B (zh) * 2022-08-05 2023-07-14 山东兴达化工有限公司 一种氰尿酸生产用湿式球磨装置

Also Published As

Publication number Publication date
SE347879B (da) 1972-08-21
NO122216B (da) 1971-06-01
FI47283C (fi) 1973-11-12
FI47283B (da) 1973-07-31
GB1119154A (en) 1968-07-10
IL25815A (en) 1969-11-30
DE1507767B (da)
ES327611A1 (es) 1967-03-16
CH456315A (de) 1968-07-15

Similar Documents

Publication Publication Date Title
US5082187A (en) Vibrating screen crusher
US2974795A (en) Grizzly feeders
US3452938A (en) Jaw-type crusher
US2097906A (en) Crusher for stone and like materials
US2921750A (en) Stonebreaking machines
US2996261A (en) Feed and discharge screen structures for rock crushing apparatus
US5110058A (en) Rock crusher
RU169141U1 (ru) Вибрационная щековая дробилка
US3556415A (en) Jaw crusher and method of operation thereof
US2447303A (en) Crushing machine for rocks and the like
RU2621357C1 (ru) Вибрационная щековая дробилка
US2383457A (en) Rock crusher
NO163105B (no) Fremgangsmaate for nedbryting av et viskoest, mikrobielt polysakkaridpreparat.
LU504433B1 (en) An ore screening and crushing machine
US3980554A (en) Ore washing machine
US457923A (en) moese
US1085997A (en) Screening apparatus.
US1136293A (en) Process of and apparatus for classifying comminuted material.
US2873922A (en) Jaw crusher
US2828924A (en) Grinding mill including vibrating feed hammer
RU2275253C1 (ru) Вибрационный грохот
US2736503A (en) Jaw crusher with material feeding and turning belt moving over the stationary crushing plate
JP3137134B2 (ja) 移動式クラッシャ
US460436A (en) Grain and cockle separator
US821430A (en) Ore-separator.