Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2546286 A
Publication typeGrant
Publication dateMar 27, 1951
Filing dateJun 28, 1947
Priority dateJun 28, 1947
Publication numberUS 2546286 A, US 2546286A, US-A-2546286, US2546286 A, US2546286A
InventorsPaul Zakel
Original AssigneePaul Zakel
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rotary beater mill with imperforate concaves, vertical baffled discharge, upper anvil plate, and air and material inlets
US 2546286 A
Previous page
Next page
Description  (OCR text may contain errors)

March 27, 1951 P. ZAKEL 2,546,286

ROTARY EEATER MILL WITH IMPERFORATE CONCAVES, VERTICAL BAFFLED DISCHARGE, UPPER ANVIL PLATE, AND AIR AND MATERIAL INLETS 3 Sheets-Sheet 1 Filed June 28, 1947 iNVENTOR .PauZ @Jbel M will I l E\ E ATTOPNEYS 2,546,286 VERTICAL AND 5 Sheets-Sheet 2 1 m I I I I 1 1 n ROTARY BEATER MILL WI March 27, 1951 Filed June 28, 1947 r 1 I z 1 1 I I 1 1 I I I n INVENTOR Paul Zakel ATTORNEYS March 27, 1951 P. ZAKEL 2,546,286


Application June 28, 1947, Serial No. 757,879

7 Claims. (o1. 241-50) The object of the invention is to provide an ore. reductionv mill which includes a novel arrangement of rotary beater bars and a stationary breaking plate and anvil, together with an automatic air intake, a return chute leading from a classifier into the mill, and a side feed mechanism for feeding material to the beater bars, all so arranged in such relative combir-iation of said parts as to provide a highly efficient mill.

These objects are accomplished by .means of such structure and relative arrangement of parts as will. fully appear by a perusal of the following specification and claims.

In the drawings:

Fig. 1 is a side elevation of the ore reduction mill, mainly in section.

Fig. 2 is a. cross section on line .2-2. of Fig. 1.

Fig- 3 is. an enlarged fragmentary sectional elevation showing the classifier assembly in one position of adjustment.

Fig. 4 is a similar view, but shows the classitier assembly in another position of adjustment.

Referring now more particularly to the characters of reference on the drawings, the improved or'e reduction mill comprises a housin indicated generally at I. The housing I includes transversely spaced side plates 2 and end walls 3;. such housing being split horizontally at a. substantially central point and hinged togather, as at 4., for opening movement of the top half whereby to provide access. into said housing for repair or replacement of. the parts therein. The housing halves are normally maintained against opening movement by a flange. 5

mounted in connection with the end wall 3 oppositc the hinge. 4..

A heavy-duty rotor, indicated generally at 6, is. mounted in. the. housing I, for rotation, on a transverse horizontal shaft 1 which projects through. the side plate 2 and is carried externally thereof in bearings 8. At one. end the shaft is driven by any suitable means. (not shown), such as an electric motor and reduction gear unit.

The rotor 6 includes a spider, indicated generally at 9, the legs of which are in the form. of flat blades I'D mounted on a hub I I. and facing in. the direction of rotation. At their outer ends the blades I 0 each carry a transverse beater blade i2 of wear resistant steel. At the ends of the rotor the blades I U are fixed in connection with and discs I3, which impart. rigidity to the rotor and run in relatively close relation to. corresponding side plates 2.

A breaking plate I4 is mounted in the housin l in surrounding relation to the rotor except for the top portion of the latter; such breaking plate being fixed at one end in connection with the corresponding end wall 3; thence extending downwardly and about the bottom of the rotor; and thence extending up the opposite end wall to adjacent the top thereof. The arcuate configuration of the breaking plate 14 is such that the. distance between the periphery of the rotor and said plate gradually increases in the direction, of. rotation. The reduction chamber formed by the breaking plate M and the side plates 2 is indicated generally at l5. The transverse beater blades. l2 are. removably mounted on the spider legs or fan blades l0, and normally project slightly beyond the periphery of the rotor for effective ore engagement and impelling through the. reduction chamber l5.

At the top, substantially centrally thereof, the

housing I is in communication with an upwardly extending. throat I6 formed by an upstanding classifier box, indicated generally at H, which will be. hereinafter described in greater detail as to its structure and function. An anvil plate i8 is mounted in the housing I, at the top thereof, generally tangential to the rotor and in a position directly above the upturning side of such rotor. As so mounted the anvil plate 18 is disposed ahead of the throat IE in a direction contra to the direction of rotor movement.

A feed chute I9 is mounted on one side plate 2 above the shaft 1, and. delivers through an opening 20 in said side plate; the corresponding end disc l3 of the rotor having an annular opening 21 running in register with the opening 20 so that ore from the chute 19 may pass through openings 20 and 2| into the rotor between the blades ID; the latter being cut away adjacent the opening 2| as at 22, to prevent choking of ore delivery to the rotor.

Once in the rotor, which is turned at substantial speed. the ore is impelled "about in a generally circular path by the blades t0, and par ticularly by the beater blades l2 thereon. As the ore runs against the breaking plate I4 it is gradually reduced in size, and additionally on the upward path of its motion such ore is cast, by the plates It! and I2. against the anvil plate I8, causing disintegration or reduction of such ore.

As the rotor 6 is traveling atv substantial speed there is a tendency to create a suction in the reduction chamber I5. which suction is effective in. an air inlet passage 23 leading downwardly through the top of the housing I adjacent the end opposite the anvil plate l8; there being a suction-opened, spring-closed valve unit 24 associated with the air inlet passage 23. When the mill is running, the valve unit 24 will automatically open to permit of air entry into the reduction chamber 15 as working conditions may require; otherwise preventing escape of reduced ore from the mill.

Within the lower end thereof the throat l of the upstanding classifier box [1 is fitted with a grate or fixed bank of bafile plates 25; these baffle plates being fiat, of substantial height, and disposed in a row between the side plates 2 in closely spaced, facing relation.

A return chute 25 leads into the reduction chamber !5 at a point directly below the air inlet passage 23, which of course is at the end of the mill opposite the anvil plate I8. The return chute 26 includes a bafile plate Zl extending at an upward. incline within the classifier box I! between the side Walls 23 thereof, and forming, with one end wall 29 of such box, a hop-per 33. The baffle plate 21 terminates, at its upper end, in spaced relation to the opposite end wall 29 whereby to provide an upward air flow passage 5 above the fixed bank of baffle plates 25.

At the upper end of passage 3|, the air flow is delivered against an arcuate baffle 32 on said opposite side wall 29 curving upwardly and inwardly whereby to divert air flow from passage 3! directly over the hopper 30. Thence, the air flow turns and travels upwardly through an adjustable classifier unit, indicated generally at 33, finally flowing or passing out of the mill through a top outlet neck 34.

When the mill is in operation, the ore which has been reduced to very fine particles, or dust, is carried, by the air stream, through the fixed bank of baflle plates 25, and flows upwardly in the passage 3i, whence it is deflected by baffle 32 directly over the hopper 30. The large and unreduced pieces of ore are separated from the air stream by the bank of baflle plates 25, but the spacing of these plates is such that they effect merely an initial rough separation, and some pieces of ore of too large size continue upwardly in the air stream in passage 3|. However, these too large pieces of ore are separated by the adjustable classifier unit 33, in the manner which will hereinafter appear, and fall downwardly into the hopper 30 and return into the reduction chamber through the chute 26 for further reduction. The stream of air, laden with the reduced ore dust, flows out of the mill through the top outlet neck 34 to a cyclone or the like for recovery of the dust and subsequent processing thereof to recover its mineral content.

The adjustable classifier unit 33 is constructed and operates as follows:

The adjustable classifier unit 33 includes a plurality of fiat plates 35 of substantial height extending horizontally across the classifier box I1 between the side walls 28 thereof; said plates 35 being disposed in relatively closely spaced, parallel facing relation. At opposite ends, substantially centrally of their upper and lower edges, the plates 35 include trunnion pins 36 which extend through the side walls 28 in sup porting relation to said plates. At opposite sides of the classifier box 11 alternate trunnion pins 33 are fitted with upstanding radial arms 31; this alternate arrangement being necessary because of the close spacing of the plates 35, The

row of radial arms 31 on each side of the classifier box I! are pivotally connected to a control link 38 for swinging movement in unison, while maintaining the parallelism of the plates 35. The control links 38 extend beyond one end of the classifier box and are pivotally connected, as at 39, with the upper end of radial levers 40 on a cross shaft 4| journaled in supporting brackets 42. The cross shaft 4| includes, centrally thereof, an upstanding hand lever 43 normally maintained in selective position by adjustment by releasably latching the same to a notched quadrant 44. With this arrangement, swinging of the hand lever &3 simultaneously actuates the control links 38 and causes corresponding adjustment of all of the baflie plates 35 in the bank which comprises the classifier unit 33. It is possible to adjust the angular relationship of the plates 35 from vertical, as in Fig. 3, to a sharp angle, as in Fig. 4.

As will be evident, adjustment of the bafile plates 35, from their vertical position to an angular position, causes a reduction in the velocity of the air stream flowing through the classifier box ll, with the result that greater precipitation of the larger dust particles in such air stream is accomplished. It is therefore possible to regulate, accurately, the classification 0f the reduced ore or dust which ultimately delivers from the mill through the top outlet neck 34. As previously explained, all dust particles or ore pieces which are classified out by the unit 33 can only fall into the hopper 3D for return into the mill for further reduction. The described ore reduction mill provides, in its structural assembly, effective and practical reduction means, coupled with a classifier assembly which permits of close control of the screen size of the dust which delivers from the mill outlet; both features being valuable to the effective, ractical, and economical operation of a mill of this character.

The lower edges of the bafile plates 35 are each formed with an enlarged rib or head therealong, as at 35; such beads being rounded in cross section and of wear resistant material. The beads 45 assure of better classificat on of the reduced ore passing therebetween, and additionally prevent jamming of reduced ore pieces between the plates 35 as any pieces which pass between adjacent enlarged beads can, of course, then pass between corresponding plates.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fulfills the objects of the invention, as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described the invention, the following is claimed as new and useful, and upon which Letters Patent are desired:

1. An ore reduction mill comprising a housing including spaced side plates and a front end wall and a back end wall connecting the side plates and a top, said top being fiat in a horizontal plane and provided with an outlet disposed substantially centrally of said top, a rotor including circumferentially spaced beater bars, such rotor. being supported in the housing transversely between the side plates, a breaking plate in the housing disposed transversely across the housing between the side plates, such breaking plate having an arcuate portion disposed about and spaced from the rotor below the horizontal axis of such rotor and also having a vertical portion disposed in parallelism with the back wall of the housing, an anvil plate fixed to the top wall of the housing and extending between the upper end of the vertical portion of the breaking plate and the outlet, and having a horizontal flat under face opposed to the direction of rotation of the rotor, and means for delivering material into the housing into the path of the rotor.

2. An ore mill as in claim 1 in which the axis of the rotor is disposed eccentrically of the axis of the arcuate portion of the breaking plate in a direction toward the front wall of the housing whereby the space between the rotor and breakin plate gradually increases in size in a direction toward the anvil.

3. An ore mill as in claim 1 including a plurality of vertically disposed bafile plates fixed in said opening forwardly of the inner end of the anvil plate.

4. An ore mill as in claim 1 including a vertically disposed air inlet opening into the housing adjacent the front wall, the rotor including fan blades, whereby with the turning of the rotor an air stream is drawn through said air inlet and carried through the housing and discharged through the outlet.

5. An ore reduction mill comprising a substantially rectangular housing having an ore feed opening and a separate reduced ore outlet, a driven rotor journaled in the housing on a horizontal axis, an arcuate breaking plate in the housing surrounding substantially the lower half portion of the rotor to form a reduction chamber, an anvil disposed in the top of the housing on that side of such top which is opposed to the direction of movement of the rotor, such anvil having a horizontal under face which lies in a plane substantially tangent to the upper side of the rotor and the reduced-ore outlet lying adjacent the inner edge of the anvil and above the rotor; and a classifying grate disposed in said outlet, said grate comprising a plurality of fiat baflle plates disposed on edge in closely spaced face to face relation; the lower edges of the plates lying closely adjacent the horizontal plane of the under face of the anvil.

6. An ore reduction mill comprising an enclosed housing which includes spaced side plates, a front end wall and a back end wall connecting the side plates, and a top provided with an outlet, a horizontal shaft journaled in the housing transversely of the side plates, a disc on the shaft adjacent each side plate, vanes disposed transversely of and between the discs, such vanes being fixed to the shaft and projecting radially out therefrom to points adjacent the outer periph cries of the discs, one disc being provided with an opening in its face disposed concentric with the shaft, the side plate of the housing adjacent said last named disc bein provided with an opening in communication with the opening in the disc, a material supply chute disposed in communication with the openings in the said side plate and disc, and a breaking plate and anvil assembly disposed within the housing in co-operative relation with the vanes and effective to act on material fed through said openings.

7. A mill as in claim 6 in which each vane is out out for a distance inwardly from that portion of its edge which lies contiguous to the opening in the face of said one disc.


REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Num er Name 1 Date 335,827 Mead Feb. 9, 1886 377,288 Bliss Jan. 31, 1888 625,212 Straker May 16, 1889 711,688 Williams Oct. 21, 1902 1,200,104 Haskell Oct. 3, 1916 1,210,868 Steckle Jan. 2, 1917 1 418,735 Plaisted June 6, 1922 1,543,556 Denis et al June 23, 1925 1,673,465 McLaughlin June 12, 1928 1,702,248 Crites Feb. 19, 1929 1,768,619 Lykken July 1, 1930 1,807,923 Lykken June 2, 1931 2,021,188 Johnson May 19, 1936 2,050,423 Dauber Aug. 11, 1936 2,313,956 McGrane Mar. 16, 1943 2,325,101 Bonnafoux July 27, 1943 FOREIGN PATENTS Number Country Date 380,196 Great Britain Sept. 15, 1932 582,993 Great Britain Dec. 4, 1946

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US335827 *Feb 9, 1886 Pulverizer
US377288 *Jan 31, 1888 Pulverizer
US625212 *Dec 29, 1897May 16, 1899The Central cyclone Companystraker
US711688 *May 28, 1900Oct 21, 1902Williams Patent Crusher & PulvFuel blower and pulverizer.
US1200104 *Dec 28, 1914Oct 3, 1916Centrifugal Machinery CompanyOre crusher and concentrator.
US1210868 *Dec 30, 1915Jan 2, 1917Edward J SteckleSeparating device.
US1418735 *Mar 21, 1919Jun 6, 1922Williams Patent Crusher & PulvFine grinder
US1543556 *Jan 16, 1924Jun 23, 1925Emile DenisCombined crushing, pulverizing, and separating machine
US1673465 *Jul 5, 1927Jun 12, 1928Mclaughlin Herrold LPulverizing machine
US1702248 *Dec 31, 1926Feb 19, 1929Raymond Brothers Impact PulverPulverizing mill
US1768619 *Aug 18, 1923Jul 1, 1930Henry G LykkenFuel apparatus
US1807923 *Aug 19, 1927Jun 2, 1931Lykken Henry GMaterial treating device
US2021188 *Jan 19, 1934Nov 19, 1935Lovejoy Fred PMetal working tool
US2050423 *Feb 7, 1933Aug 11, 1936Charles G DauberMaterial treating device
US2313956 *Mar 9, 1940Mar 16, 1943Western Precipitation CorpDispersion mill
US2325101 *May 16, 1941Jul 27, 1943Paul BonnafouxHay breaker
GB380196A * Title not available
GB582993A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2679933 *Apr 24, 1950Jun 1, 1954Lockhart Nathan JApparatus for separating airborne asbestos material
US2724148 *May 23, 1951Nov 22, 1955Buckeye Cotton Oil CompanySeed delinter
US2875956 *Nov 15, 1954Mar 3, 1959Microcyclomat CoPulverizer
US2981485 *May 12, 1958Apr 25, 1961Nell C MainoneDischarge apparatus for brush disintegrators and the like
US3093328 *Oct 6, 1961Jun 11, 1963Marx LawTurbo mill
US3333777 *Apr 19, 1965Aug 1, 1967HigfillGrinding mill
US3561685 *Jan 31, 1968Feb 9, 1971WedcoCenter fed mill with arcuate discharge screens
US3887141 *Sep 17, 1973Jun 3, 1975Ind Mining Machinery CorpImpact-attrition mill utilizing air flow
US4566639 *Aug 27, 1984Jan 28, 1986Williams Patent Crusher And Pulverizer CompanyCenter feed material grinding mill
US4651934 *Feb 6, 1985Mar 24, 1987Bender Martin PPulverizing mill
US4673134 *Nov 8, 1985Jun 16, 1987Omya GmbhAgitating mill, particularly agitating ball mill
US4848677 *Oct 31, 1988Jul 18, 1989Illabo Mining Equipment CompanyComminution/recovery ore mill
US5096129 *Apr 20, 1989Mar 17, 1992Cryo Quench Plus, Inc.Procedure and apparatus for comminuting hard material bodies
US5226603 *May 11, 1992Jul 13, 1993Reichner Thomas WMethod and apparatus for impaction processing of ore bodies
US5439181 *Sep 29, 1994Aug 8, 1995Williams; Robert M.Chevron device limiting mill discharge in a fluid bed system
USRE30778 *Apr 23, 1980Oct 20, 1981Pennsylvania Crusher CorporationCrusher-dryer and method of crushing
DE916488C *May 16, 1951Aug 12, 1954Hazemag HartzerkleinerungVorrichtung zum Befestigen von Schlagleisten an radialen Rippen von Schleudermuehlenumlaeufern mittels Schrauben
DE1008556B *Oct 15, 1953May 16, 1957Esch Werke K G MaschinenfabrikRotor fuer Prallmuehlen
DE2350220A1 *Oct 5, 1973Apr 17, 1975Hosokawa Micron KkSchlagzerkleinerungsvorrichtung fuer materialgemische
EP0180976A2 *Nov 6, 1985May 14, 1986OMYA GmbHAgitator mill, in particular an agitator ball mill
WO1993018859A1 *Mar 16, 1992Sep 30, 1993Cryo Quench Plus IncProcedure and apparatus for comminuting hard material bodies
U.S. Classification241/50, 241/191, 241/55, 209/139.1, 241/52, 241/188.1, 209/143, 241/185.5, 209/43, 241/79
International ClassificationB02C13/00, B02C13/26
Cooperative ClassificationB02C13/26
European ClassificationB02C13/26