Claims
- 1. A method of obtaining a mixture of coarse broken particles and fines from a feedstock of larger stones, rocks or other frangible material and of separating a stream of at least some of said fines from a resultant mixture of broken pieces, said method comprising the steps of accelerating a stream of said larger particle feedstock into a cyclonic breaking zone in a lower part of a housing where the feedstock is subjected to cyclonic action including multiple collisions and abrading forces, with the action within the breaking zone causing fines to be moved directly upwardly from the breaking zone towards an upper region of the said housing and causing at least some of said upwardly directed fines to be moved outwardly by said cyclonic action for disposal through exits disposed in upper parts of said housing, all of said fines reaching said exits arriving directly from said breaking zone.
- 2. A method as claimed in claim 1 wherein said housing has an upper hollow cylindrical part and said fines are discharged through a series of exits arranged at different levels in said wall for collecting different grades of fines from each of said exits.
- 3. A method as claimed in claim 1 which includes the steps of inhibiting the egress of larger broken pieces with said upwardly directed fines.
- 4. Apparatus for breaking and shattering a feedstock of larger rocks, stones or other frangible material and breaking and separating a stream of at least some fines from a resultant mixture of broken pieces, said apparatus comprising a housing, a feedstock accelerating, horizontally disposed rotor rotatably supported in a lower part of said housing and designed to accelerate feedstock to be discharged from the periphery of the rotor into a breaking zone in a lower part of said housing and surrounding the rotor with a cyclonic action, and movement of accelerated feedstock from the rotor into the breaking zone producing a breaking and abrading environment, and exit means in an upper part of said housing, said cyclonic action causing at least some fines to be moved directly upwardly from said breaking zone into and outwardly of said upper part for disposal through said exit means, said upper part of said housing comprising a hollow cylinder, and a series of exits being provided at different levels in the wall of said cylinder for the collection of different grades of fines from each of said exits.
- 5. Apparatus for breaking and shattering a feedstock of larger rocks, stones or other frangible material and breaking and separating a stream of at least some fines from a resultant mixture of broken pieces, said apparatus comprising a housing, a feedstock accelerating, horizontally disposed rotor rotatably supported in a lower part of said housing and designed to accelerate feedstock to be discharged from the periphery of the rotor into a breaking zone in a lower part of said housing and surrounding the rotor with a cyclonic action, and movement of accelerated feedstock from the rotor into the breaking zone producing a breaking and abrading environment, and exit means in an upper part of said housing, said cyclonic action causing at least some fines to be moved directly upwardly from said breaking zone into and outwardly of said upper part for disposal through said exit means, and screening means being included upstream of said discharge means to obviate or minimize larger pieces of broken feedstock being moved to disposal.
- 6. Apparatus for breaking and shattering a feedstock of larger rocks, stones of other frangible material and breaking and separating a stream of at least some fines from a resultant mixture of broken pieces, said apparatus comprising a housing, a feedstock accelerating, horizontally disposed rotor rotatably supported in a lower part of said housing and designed to accelerate feedstock to be discharged from the periphery of the rotor into a breaking zone in a lower part of said housing and surrounding the rotor with a cyclonic action, and movement of accelerated feedstock from the rotor into the breaking zone producing a breaking and abrading environment, and exit means in an upper part of said housing, said cyclonic action causing at least some fines to be moved directly upwardly from said breaking zone into and outwardly of said upper part for disposal through said exit means, said housing supporting a bed of broken feedstock material at its natural angle of repose against the outer wall thereof, and said exit means comprising a shelf for collecting the fines, said shelf extending outwardly from adjacent the top of the bed of material.
- 7. Apparatus as claimed in claim 6 wherein two or more diametrically opposed ports are provided in the shelf through which the desired fines move into a disposal chute or chutes.
- 8. Apparatus as claimed in claim 7 wherein a reciprocating plate is provided at a lower end of each of said chute or chutes and the delivered fines moving into said chute land on said reciprocating plate which is operated to discharge a series of quantities of fines without allowing any significant passage for air flow.
- 9. Apparatus for breaking and shattering a feedstock of larger rocks, stones or other frangible material and breaking and separating a stream of at least some fines from a resultant mixture of broken pieces, said apparatus comprising a housing, a feedstock accelerating, horizontally disposed rotor rotatably supported in a lower part of said housing and designed to accelerate feedstock to be discharged from the periphery of the rotor into a breaking zone in a lower part of said housing and surrounding the rotor with a cyclonic action, and movement of accelerated feedstock from the rotor into the breaking zone producing a breaking and abrading environment, and exit means in an upper part of said housing, said cyclonic action causing at least some fines to be moved directly upwardly from said breaking zone into and outwardly of said upper part for disposal through said exit means, deflection means being provided downstream of said exit means to assist in deflecting larger pieces of material from delivery through the exit means.
Priority Claims (1)
| Number |
Date |
Country |
Kind |
| 213510 |
Sep 1985 |
NZX |
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Parent Case Info
This is a continuation of application Ser. No. 07/135,574 filed Dec. 21, 1987, now abandoned, which was a continuation of application Ser. No. 07/905,629, filed Sept. 9, 1986, now abandoned.
This invention relates to methods of mineral breaking and/or apparatus used therefor.
Rotary impact rock-on-rock crushers have proved to be very satisfactory commercially following the development of the basic rotary impact rock-on-rock disintegrator which is described and claimed in our U.S. Pat. No. 3,970,257. One of the characteristics of our rotary impact rock-on-rock crusher is that the efficiency of the abrading environment within the breaking zone is such that a significant percentage of fine grade particles (herein called fines) is produced and this, for some applications, if judged to be undesirable. We have also found that such rotary impact disintegrators are useful with feedstocks other than rock or stone, for example coal.
It is therefore an object of the present invention to provide a method of breaking feedstock and apparatus used therefor to allow for the separation of a stream of fines during operation and which will provide the public with a useful choice.
Accordingly in one aspect the invention consists in a method of obtaining a mixture of coarse particles and fines by breaking or shattering a feedstock of stones or rocks or other fragile material and separating a stream of fines from the mixture, said method comprising the steps of accelerating a stream of said feedstock into a cyclonic breaking zone in a housing where the feedstock is subjected to multi collisions and abrading forces, the action within the breaking zone causing at least some of said fines to rise towards an upper region of said housing and causing at least some of said fines to be discharged from said upper region of said housing.
In a further aspect the invention consists in a method of obtaining a mixture of coarse broken particles and fines, from a feedstock of larger stones, rocks or other fragible material and of separating a stream of at least some of said fines from a resultant mixture of broken pieces, said method comprising the steps of accelerating a stream of said larger particle feedstock into a cyclonic breaking zone in a lower part of a housing where the feedstock is subjected to multi collisions and abrading forces with the action within the breaking zone causing fines to rise towards an upper region of said housing allowing at least some upwardly directed fines to collect on a collecting shelf extending outwardly from an upper part of said breaking zone to collect said upwardly directed fines and removing at least some of said upwardly directed fines from the collecting shelf and adjacent thereto for disposal.
In a still further aspect the invention consists in apparatus for breaking and shattering a feedstock of larger rock stone or other frangible material breaking into coarse broken particles and fines, and separating a stream of at least some fines from a resultant mixture of broken pieces said apparatus comprising a housing, a feedstock accelerating horizontally disposed rotor rotatably supported in said housing and designed to accelerate feedstock to be discharged from the periphery of the rotor into a breaking zone in a lower part of said housing and surrounding the rotor with a cyclonic action and movement of accelerated feedstock generated by the rotor within the chamber producing a breaking and abrading environment, a shelf means provided in the housing extending outwardly from adjacent the top of the breaking zone to provide a collection surface on which fines collect, and ports in the shelf through which collected fines are moved to disposal.
To those skilled in the art to which the invention relates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves without departing from the scope of the invention as defined in the appended claims. The disclosures and the descriptions herein are purely illustrative and are not intended to be in any sense limiting.
US Referenced Citations (8)
Foreign Referenced Citations (2)
| Number |
Date |
Country |
| 0140613 |
May 1985 |
EPX |
| 376760 |
Jul 1932 |
GBX |
Continuations (2)
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Number |
Date |
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| Parent |
135574 |
Dec 1987 |
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| Parent |
905629 |
Sep 1986 |
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Patent Grant
4921173
