US1710666A - Comminuting mill - Google Patents
Comminuting mill Download PDFInfo
- Publication number
- US1710666A US1710666A US259968A US25996828A US1710666A US 1710666 A US1710666 A US 1710666A US 259968 A US259968 A US 259968A US 25996828 A US25996828 A US 25996828A US 1710666 A US1710666 A US 1710666A
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- Prior art keywords
- screen
- receptacle
- drum
- chamber
- comminuting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
Definitions
- This invention relates generally to improvements in the construction and operat on of rotary comminuting mills for reducing granular material to a fine powder.
- An object of the invention is to provide a new and useful comminuting mill for ellectively reducing granular material such as cement clinker, to a line powder.
- Another object of the invention is to provide improved classifying means for separating the material being treated in a commlnuting system, into several grades, and for delivering the separated grades to apparatus which is especially adapted to subsequently efiectively treat the several grades.
- a further object of the invention is to provide improved screening mechanism operable directly by the movement of a comminuting mill, and means associated with the screen for distributing the screened material.
- Still another object of the invention is to provide an improved attachment tor rotary comminuting mills wherein the material is reduced by stages,
- a further object of the invention is to provide an improved multiple compartment comminuting mill wherein freely tumbling. comminuting bodies are utilized, and in which the action or these bodies is not interfered with by screens or the like.
- the single figure ot the drawing is a relativelydiagrammatic illustration of a multiple compartment tube mill having the improved classifying or screenmg device associ-,
- the multiple compartment comminutin mill comprises in general an elongated shel or drum 5 supported for rotation about a substantially horizontal axis, by means of feed and discharge end trunnions 6, i", and having therein two partitions 39,
- the coarse grinding chamber 2 one be formed of larger diameter than the ot ers, and mayalso be provided with a tapered portion as shown, at the discharge end thereof
- the feed trunnion 6 located at the inlet ,end of the chamber 2 is provided with a feeder 9 cooperating with a tapered end liner 28, for introducing the untreated material to the mill.
- the material After being initially reduced in the chamber 2 by the large comminuting bodies 29, the material is delivered th'roughan end screen 10 and through a series of peripheral ()pBIllIlgS 36, to one end of an outer screen 11.
- the screen 11 is attached directly to and is rotatable with the drum 5, and has the end thereof remote from the openings 36, open for the discharge of rejects which fail to pass through the screening openings during rotation of the screen.
- Located directl beneath the annular outer screen 11 is a stationary receptacle 13 forming a trough one end of which is closed by a wall secured to the receptacle and extending in close proximity to the peripheral edge of the screen.
- a spiral conveyer 12 which is attached directly'to the screen 11 cooperates with the receptacle 13 to urge material delivered thereto throu h the screen 11, along the receptacle in a irectlon away from the wall 15.
- the drum 5 is provided with spiral scoops 18 at the medial portion of the coarse grinding chamber 2, and these scoops 18 are adapted to return the screen rejects entering the receptacle 14, to the interior of the chamber 2 for further reduction.
- the material delivered from the rece ta cle 13 bythe conveyor 12, is discharged into a stationary receptacle 16 from whence it is automatically removed and injected into the feed end of the intermediate comminutin compartment 8, by means of spiral scoops 1% secured to and operable by the movement of the drum 5.
- a bucket elevator 22 which raises the said material and delivers the same to an air separator.
- the air separator consists of a housing within which is located a distributing rotor 33 and a fan 32.
- the rotor 33 is disposed directly above a hopper 34 which is adapted to collect the oversize and to deliver the same through a spout 37 to the stationary receptacle 16, from whence this oversize is delivered together with the material received from the receptacle 13, to the intermediate comminuting compartment 3.
- the hohsing of the dust collector is provided with a conical bottom forming a collecting hopper for thefine-material removed by the air separator. fine material deposited thereon, through a spout 38 to a stationary receptacle 23 located below the inlet end of the fine. rinding compartment 4.
- the operation 0% the air separator is well known to those skilled in.
- the material delivered to the rotor 33 bein thrown outwardly toward an interior ba e by centrifugal force, and the air current induced within this baflie by the fan 32 picking up the lighter particles, which, after passing t rough the fan, are thrown outwardly against the housing wall and eventually drop by gravity upon the conical bot tom 35 from which they are discharged by avity.
- the feed end of the fine grinding compartment or chamber 4- is provided with petill ripheral scoops 24 which remove the relatively fine material fromthe stationary receptacle 23 and introduce the same into the chamber 4r.
- the tumbling coinminuting bodies 31 within the chamber at reduce the graded material thus admitted, to a fine powder.
- the finally reduced material is eventually discharged through an internal grating 25, into the ath of elevating vanes 26 which lift the final product and discharge the same through an opening 2'? in the trunnion 7, in an obvious manner. Continuous rotation may be imparted to. the drum 5, the scoops 17,
- the revolving screen 11 serves toss arate the oversize from the relatively inc
- the conical bottom 35 delivers- .ters Patent rectly to the screen 11 minimum head room is required in order to deliver the fine material from the receptacle 13 into the receptacle 16.
- the screen 11 may obviously be made of any desired length in order to insure efiective removal of the fines, and the spiral return scoops 18 serve to deliver the rejects to the medial portion of the comminutin chamber 2 so that they may be effectively reduced during subsequent travel through this chamber.
- the classifying devices besides being highly efi'ective in operation, is also extremely compact and accessible and does not in any manner interfere with the free tumbling action of the comminuting bodies within the mill.
- a rotary drum forming a connninuting chamber, a'scrcen'communieating with said chamber and rotatable with said drum, a stationary receptacle disposed beneath said screen, a second stationary receptacle communicating with the interior of said screen, a conveyer secured to said screen and movable in said first mentioned receptacle to urge material delivered thereto through.
- said screen along said receptacle ill) longitudinally of the axis of said drum, and
- a rotary drum forming a comminuting chamber, a screen communieating with said chamber and rotatable with said drum, a receptacle independent of said drum disposed beneath said screen, a second receptacle independent of said drum communicating with the interior of said screen, a conveyor operable by the rotation of said drum to urge material delivered to said first mentioned receptacle through said screen toward an end of said receptacle, and means for returning to said drum material delivered from said screen to said second receptacle.
- a rotary drum forming a comminuting chamber, a screen surrounding and communicating with said chamber, said screen being rotatable with said drum, a receptacle independent of said drum disposed beneath said screen, a second receptacle independent of said drum communicating with the interior of said screen, a conveyer secured to said screen and movable thereby within said first mentioned receptacle t9 urge material delivered through said screen toward an end thereof, and means rotatable with said drum for returning thereto material delivered from said screen to said second receptacle.
- a rotary drum forming acom'minuting chamber, a screen surroundingand communicating with said chamber, said screen being rotatable with said drum, a stationary receptacle disposed beneath said screen and formed to receive material passing therethrough, a second stationary receptacle for receiving from said screen material which fails to pass therethrough, means for returning material which fails to pass through said screen to said chamber, and means operable by the movement of said screen for urging material delivered to said first mentioned receptacle therealong longitudinally of the axis of rotation of said drum;
- a rotary drum forming a plurality of comminuting chambers, a screen disposed concentrically of said drum and communicating with one of said chambers, said screen being rotata le with said drum, a sta iffy receptacle disposed beneath said screen and formed to receive material passing thercthrough, a second Staeatin with said chamber, saidscreen surrounding said drum and being attached directly t ereto so as to rotate therewith, a stationary receptacle disposed beneath saidscreen, a second stationary receptacle for receiving rejects from said screen, a spiral conveyer secured directly to the peri hery of said screen and cooperable with sai first mentioned receptacle to urge screened material therealong, and a scoop carried by said drum for returning rejects from said second receptacle to said chamber.
- a rotary drum forming a comminuting chamber, a screen surrounding said drum and extending therealong, said screen being attached directly to said drum and being spaced from the exterior thereof, a stationary receptacle disposed beneath said screen and forming a trough spaced from the external screen' surface, a second stationary receptacle for receiving rejects from the interior of said screen, a spiral conveyer secured directly to said external screen surface and cooperable with said trough to urge material passing through said screen along said trough longitudinally of the axis of said drum, and a scoop carried by said drum for returning rejects from said second receptacle to said chamber.
- a rotary drum forming a plurality of comminuting chambers, a screen surrounding said drum and communicating with an end of one of said chambers, said screen being attached directly to said drum and extending therealong, a stationary receptacle for receiving rejects from the interior of said screen, means associated with said drum beyond the end of said screen which communicates with said chamber for returning rejects to said chamber, a second stationary receptacle disposed externally of said screen, a spiral conveyer secured directly to said screen for urging material delivered to said second receptacle longitudinally of said screen and away from said rejects returning means, and means for returning said last mentioned material to another of said chambers beyond the end of said screen.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
Description
April 23, 1929. R; c, NEWHQUSE 13 710,666
COMMINUTING MILL Filed March 1928 mom/W hatented Apr. 23, 1929.
UNITED STATES 1,710,666 PATENT OFFICE.
nan c. NEWHOUSE, or MILWAUKEE, WISCONSIN, ASSIGNOR r ALLIS-GHALMEBS racrunme COMPANY, or MILWAUKEE, WISCONSIN, a conroaarron or EELAWABE.
oomamurmo 11111..
Application filed larch 8, 1928. Serial in. 259,968.
This invention relates generally to improvements in the construction and operat on of rotary comminuting mills for reducing granular material to a fine powder.
An object of the invention is to provide a new and useful comminuting mill for ellectively reducing granular material such as cement clinker, to a line powder. Another object of the invention is to provide improved classifying means for separating the material being treated in a commlnuting system, into several grades, and for delivering the separated grades to apparatus which is especially adapted to subsequently efiectively treat the several grades. A further object of the invention is to provide improved screening mechanism operable directly by the movement of a comminuting mill, and means associated with the screen for distributing the screened material. Still another object of the invention is to provide an improved attachment tor rotary comminuting mills wherein the material is reduced by stages,
which will insure delivery of material of proper mesh to each of the several comminuting chambers for effecting the several stages of reduction. A further object of the invention is to provide an improved multiple compartment comminuting mill wherein freely tumbling. comminuting bodies are utilized, and in which the action or these bodies is not interfered with by screens or the like. These and other objects and advantages of the invention will be apparent in the course of the following description.
A clear conception of an embodiment of the invention and of the mode of operating devices constructed in accordance therewith,
may be had by referring to the drawing ac-.
companying and forming a part of this specification in which the various parts have been referred to by suitable reference characters.
The single figure ot the drawing is a relativelydiagrammatic illustration of a multiple compartment tube mill having the improved classifying or screenmg device associ-,
ated therewith.
In the drawing, the multiple compartment comminutin mill comprises in general an elongated shel or drum 5 supported for rotation about a substantially horizontal axis, by means of feed and discharge end trunnions 6, i", and having therein two partitions 39,
which divide the interior or thedrum into I successive comminut'mg chambers 2, 3, i hav- The coarse grinding chamber 2 one be formed of larger diameter than the ot ers, and mayalso be provided with a tapered portion as shown, at the discharge end thereof The feed trunnion 6 located at the inlet ,end of the chamber 2, is provided with a feeder 9 cooperating with a tapered end liner 28, for introducing the untreated material to the mill. After being initially reduced in the chamber 2 by the large comminuting bodies 29, the material is delivered th'roughan end screen 10 and through a series of peripheral ()pBIllIlgS 36, to one end of an outer screen 11. The screen 11 is attached directly to and is rotatable with the drum 5, and has the end thereof remote from the openings 36, open for the discharge of rejects which fail to pass through the screening openings during rotation of the screen. Located directl beneath the annular outer screen 11 is a stationary receptacle 13 forming a trough one end of which is closed by a wall secured to the receptacle and extending in close proximity to the peripheral edge of the screen. A spiral conveyer 12 which is attached directly'to the screen 11 cooperates with the receptacle 13 to urge material delivered thereto throu h the screen 11, along the receptacle in a irectlon away from the wall 15. A stationary receptacle 14 disposed atr'the end of the screen 11 ad3oining the wall 15, is adapted to receive the re]ects from the interior of the rotating screen 11. The drum 5 is provided with spiral scoops 18 at the medial portion of the coarse grinding chamber 2, and these scoops 18 are adapted to return the screen rejects entering the receptacle 14, to the interior of the chamber 2 for further reduction.
The material delivered from the rece ta cle 13 bythe conveyor 12, is discharged into a stationary receptacle 16 from whence it is automatically removed and injected into the feed end of the intermediate comminutin compartment 8, by means of spiral scoops 1% secured to and operable by the movement of the drum 5. In the intermediate cham ber 3 to a bucket elevator 22 which raises the said material and delivers the same to an air separator. The air separator consists of a housing within which is located a distributing rotor 33 and a fan 32. The rotor 33 is disposed directly above a hopper 34 which is adapted to collect the oversize and to deliver the same through a spout 37 to the stationary receptacle 16, from whence this oversize is delivered together with the material received from the receptacle 13, to the intermediate comminuting compartment 3. The hohsing of the dust collector is provided with a conical bottom forming a collecting hopper for thefine-material removed by the air separator. fine material deposited thereon, through a spout 38 to a stationary receptacle 23 located below the inlet end of the fine. rinding compartment 4. The operation 0% the air separator is well known to those skilled in. the art, the material delivered to the rotor 33 bein thrown outwardly toward an interior ba e by centrifugal force, and the air current induced within this baflie by the fan 32 picking up the lighter particles, which, after passing t rough the fan, are thrown outwardly against the housing wall and eventually drop by gravity upon the conical bot tom 35 from which they are discharged by avity. i
The feed end of the fine grinding compartment or chamber 4- is provided with petill ripheral scoops 24 which remove the relatively fine material fromthe stationary receptacle 23 and introduce the same into the chamber 4r. The tumbling coinminuting bodies 31 within the chamber at reduce the graded material thus admitted, to a fine powder. The finally reduced material is eventually discharged through an internal grating 25, into the ath of elevating vanes 26 which lift the final product and discharge the same through an opening 2'? in the trunnion 7, in an obvious manner. Continuous rotation may be imparted to. the drum 5, the scoops 17,
18, 24, and to the screen 11, by means oi! a driving gear 8 located at the discharge end of the mill. 1 r V From the foregoing description it will be noted thatduring normal operation of the mill, the revolving screen 11 serves toss arate the oversize from the relatively inc The conical bottom 35 delivers- .ters Patent rectly to the screen 11 minimum head room is required in order to deliver the fine material from the receptacle 13 into the receptacle 16. The screen 11 may obviously be made of any desired length in order to insure efiective removal of the fines, and the spiral return scoops 18 serve to deliver the rejects to the medial portion of the comminutin chamber 2 so that they may be effectively reduced during subsequent travel through this chamber. The classifying devices besides being highly efi'ective in operation, is also extremely compact and accessible and does not in any manner interfere with the free tumbling action of the comminuting bodies within the mill.
It is to be noted that the novel use of an air separator for the purpose of classifying preliminarilyreduced material in order to separate the fines from the coarse material, and the [further reduction of the separated fine material alone in a comminuting chamber, while being disclosed in connection with the present invention, forms no part thereof, and is the subject of a copending application Serial No. 256,209, filed February 23, 1928. The present invention is however especially adapted for use in connection with thisprior invention, in order to insure the production of extremely fine pulverulent material such as is required in the manufacture of cement.
It should be understood that it is not desired to limit the present invention to the exact details of construction and operation herein shown and described for various modifications within the scope of the claims may occur to persons skilled in the art.
lit is claimed and desired to secure by Let- 1. In combination, a rotary drum forming a connninuting chamber, a'scrcen'communieating with said chamber and rotatable with said drum, a stationary receptacle disposed beneath said screen, a second stationary receptacle communicating with the interior of said screen, a conveyer secured to said screen and movable in said first mentioned receptacle to urge material delivered thereto through. said screen along said receptacle ill) longitudinally of the axis of said drum, and
means for returning to said drum material delivered from said screen to said second receptacle.
2. In combination, a rotary drum forming a comminuting chamber, a screen communieating with said chamber and rotatable with said drum, a receptacle independent of said drum disposed beneath said screen, a second receptacle independent of said drum communicating with the interior of said screen, a conveyor operable by the rotation of said drum to urge material delivered to said first mentioned receptacle through said screen toward an end of said receptacle, and means for returning to said drum material delivered from said screen to said second receptacle.
3. In combination, a rotary drum forming a comminuting chamber, a screen surrounding and communicating with said chamber, said screen being rotatable with said drum, a receptacle independent of said drum disposed beneath said screen, a second receptacle independent of said drum communicating with the interior of said screen, a conveyer secured to said screen and movable thereby within said first mentioned receptacle t9 urge material delivered through said screen toward an end thereof, and means rotatable with said drum for returning thereto material delivered from said screen to said second receptacle.
4. In combination, a rotary drum forming acom'minuting chamber, a screen surroundingand communicating with said chamber, said screen being rotatable with said drum, a stationary receptacle disposed beneath said screen and formed to receive material passing therethrough, a second stationary receptacle for receiving from said screen material which fails to pass therethrough, means for returning material which fails to pass through said screen to said chamber, and means operable by the movement of said screen for urging material delivered to said first mentioned receptacle therealong longitudinally of the axis of rotation of said drum;
5. In combination, a rotary drum forming a plurality of comminuting chambers, a screen disposed concentrically of said drum and communicating with one of said chambers, said screen being rotata le with said drum, a sta ionary receptacle disposed beneath said screen and formed to receive material passing thercthrough, a second Staeatin with said chamber, saidscreen surrounding said drum and being attached directly t ereto so as to rotate therewith, a stationary receptacle disposed beneath saidscreen, a second stationary receptacle for receiving rejects from said screen, a spiral conveyer secured directly to the peri hery of said screen and cooperable with sai first mentioned receptacle to urge screened material therealong, and a scoop carried by said drum for returning rejects from said second receptacle to said chamber.
7. In combination, a rotary drum forming a comminuting chamber, a screen surrounding said drum and extending therealong, said screen being attached directly to said drum and being spaced from the exterior thereof, a stationary receptacle disposed beneath said screen and forming a trough spaced from the external screen' surface, a second stationary receptacle for receiving rejects from the interior of said screen, a spiral conveyer secured directly to said external screen surface and cooperable with said trough to urge material passing through said screen along said trough longitudinally of the axis of said drum, and a scoop carried by said drum for returning rejects from said second receptacle to said chamber.
8. In combination, a rotary drum forming a plurality of comminuting chambers, a screen surrounding said drum and communicating with an end of one of said chambers, said screen being attached directly to said drum and extending therealong, a stationary receptacle for receiving rejects from the interior of said screen, means associated with said drum beyond the end of said screen which communicates with said chamber for returning rejects to said chamber, a second stationary receptacle disposed externally of said screen, a spiral conveyer secured directly to said screen for urging material delivered to said second receptacle longitudinally of said screen and away from said rejects returning means, and means for returning said last mentioned material to another of said chambers beyond the end of said screen.
In testimony whereof, the signature of the inventor is affixed hereto.
'RAY o. NEWHOUSE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US259968A US1710666A (en) | 1928-03-08 | 1928-03-08 | Comminuting mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US259968A US1710666A (en) | 1928-03-08 | 1928-03-08 | Comminuting mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1710666A true US1710666A (en) | 1929-04-23 |
Family
ID=22987237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US259968A Expired - Lifetime US1710666A (en) | 1928-03-08 | 1928-03-08 | Comminuting mill |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1710666A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2430085A (en) * | 1943-07-09 | 1947-11-04 | Pittsburgh Midway Coal Mining | Process of preparing coal for use in colloidal fuels |
| US3533564A (en) * | 1967-01-31 | 1970-10-13 | Pacemin Ag Patentverwertungs G | Plant for grinding granular material |
| DE2928939A1 (en) * | 1979-07-18 | 1981-02-12 | Kloeckner Humboldt Deutz Ag | Tube mill with two grinding chambers - has chambers completely separated by partition for simultaneous grinding of two different materials |
| US4674691A (en) * | 1985-10-24 | 1987-06-23 | Didion Manufacturing Company | Dual sand reclaimer |
-
1928
- 1928-03-08 US US259968A patent/US1710666A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2430085A (en) * | 1943-07-09 | 1947-11-04 | Pittsburgh Midway Coal Mining | Process of preparing coal for use in colloidal fuels |
| US3533564A (en) * | 1967-01-31 | 1970-10-13 | Pacemin Ag Patentverwertungs G | Plant for grinding granular material |
| DE2928939A1 (en) * | 1979-07-18 | 1981-02-12 | Kloeckner Humboldt Deutz Ag | Tube mill with two grinding chambers - has chambers completely separated by partition for simultaneous grinding of two different materials |
| US4674691A (en) * | 1985-10-24 | 1987-06-23 | Didion Manufacturing Company | Dual sand reclaimer |
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