Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1985-11-18
1987-07-14
Goldberg, Howard N.
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
2411012, 241207, 241215, B02C 206
Patent
active
046797416
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a crusher with rotary plates of the type recited in the preamble of the appurtenant claim 1.
A rotary-plate crusher of this type is disclosed in German Patent DAS-1,091,414 and comprises in addition to the above features, vertical ricochet bars which surround the crusher plates and are spaced a distance from the plate periphery.
In the apparatus described in the German specification, lump materials such as rocks are fed into the apparatus for crushing. A portion of the material will be crushed between the high-speed rotary plates before the material, spinning at high speed owing to the rotation of the plates, is flung out through the peripheral slot between the plates and strikes the vertical bars, where it may be crushed further. Because of the way in which this crusher is constructed, only a small proportion of the lump material will actually be subjected to crushing, since much of the material, owing to the rotation of the plates, will disappear through the opening of the annular slot between the plates.
For a crusher of this type to crush material down to the smallest particle size, corresponding to the minimum distance between the crusher plates, the crusher would have to operate with a very high percentage of recycled material, because probably about 80% of the material will pass through the crusher without being crushed in the annular crushing zone between the plates.
An attempt to construct a production machine based on the principle of the above crusher for producing finely-crushed particles would in all probability result in a machine of such large dimensions that it would not be competitive compared to an ordinary pulverizer of conventional type. The reason for this, as mentioned above, is that the machine would have to operate with a high percentage of recycled material, which in practice would mean that one would have to send four to five times as much material through the machine as one wanted to crush. The resulting wear on both the rotary plates and the vertical bars would make this solution impossible to utilize in practice.
The object of the present invention is to provide a crusher which has a crushing capacity many times greater than that of existing crushing machines of the same dimensions, while at the same time the amount of wear on the machine and the percentage of recycled material are kept within limits comparable to those of existing crusher machines.
This is obtained according to the invention by means of the features recited in the characterizing clauses of the appurtenant claim 1 and the succeeding dependent claims. As disclosed in claim 1, the crusher plates of the apparatus execute both a rotary and a gyrating movement, the gyration occurring in the opposite direction of rotation in relation to the direction of rotation of the plates. In this manner, a particle which is fed into the crusher and becomes caught between the plates in the inner region of the annular crushing slot between the plates will be retained there and be subjected to crushing forces up to several times in the crushing slot before the crushed particles are flung out by centrifugal force from the annular crushing slot.
This crushing principle will be discussed in greater detail in the following description of an embodiment of the invention, illustrated schematically in the accompanying drawings, wherein
FIG. 1 shows an axial cross sectional view of the crusher, and
FIG. 2 shows the annular crushing zone of the crusher plates in plan view, indicating the path of movement of a particle during crushing.
The crusher shown in FIG. 1 comprises two crusher plates 1,2 disposed one above the other and spaced apart to form between the plates an annular crushing slot 4 with radial, outwardly-converging crushing surfaces 1',2', said plates 1,2 being rotatable about respective axes of rotation A,B which are non-parallel. The upper plate 1 is provided with a central feed opening 3 with a funnel or tube 5 which projects downwardly into the opening 3 and which does not rotate during the rot
REFERENCES:
patent: 1030194 (1912-06-01), Lieber
patent: 1031083 (1912-07-01), Newhouse
patent: 1226275 (1917-05-01), Symons
patent: 1628619 (1927-05-01), Sprado
patent: 1641776 (1927-09-01), Newhouse
patent: 1936728 (1933-11-01), McCaskell
patent: 1993900 (1935-03-01), Rumpel
patent: 2716926 (1955-09-01), Armstrong
patent: 3312404 (1967-04-01), Allen
Fried. Krupp Gesellschaft mit beschrankter Haftung
Goldberg Howard N.
Gorski Joseph M.
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