Solid material comminution or disintegration – Apparatus – Stationary comminuting surface or material bed
Patent
1998-03-30
1999-12-28
Hail, III, Joseph J.
Solid material comminution or disintegration
Apparatus
Stationary comminuting surface or material bed
241300, B02C 204
Patent
active
060070102
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to machines for crushing of solid materials, in particular, to centrifugal grinders and can be used in mining, construction, metallurgical, chemical and other branches of industry.
Meeting the industrial demands in solid materials crushing nowadays requires large amounts of energy and capital expenses. Solid materials crushing devices known from the prior art are of low efficiency.
A centrifugal grinder known in the prior art contains a body, a working part comprising a lower link with the partitions and fixed on the vertical shaft as well as an upper link, loading and unloading brunch pipes, and a mechanism of the upper link travel (SU, 946650).
A disadvantage of the known grinder is a low efficiency of crushing and high wear of the working organ elements.
A centrifugal grinder is known in the prior art containing a body with loading and unloading devices wherein upper and lower working organs are mounted, these organs being capable to rotate in opposite directions around the vertical axis forming a working chamber with an annular unloading aperture (SU, 1260015).
A disadvantage of the known grinder is a low efficiency of crushing owing to a low frequency of mutual collision of grinding material.
SUMMARY OF THE INVENTION
The aim of this invention is to create a centrifugal grinder providing a high efficiency of solid materials crushing and due to this to decrease energy requirements and capital expenses for solid material crushing.
This problem is solved by creation of a centrifugal grinder that comprises a body having a vertical axis and loading and unloading devices, upper and lower working parts which are rotatably mounted on the body for rotation in opposite directions about the vertical axis and forming between each other a working chamber with an annular unloading aperture. The upper working part has an axial loading aperture. According to the invention the said upper working part is made in the shape of a hollow cone while the lower working part is made in the shape of a conical disc, which is mounted on the base of the said hollow cone and the summit of the conical disc is located within the hollow cone.
Because the upper working part is made in the shape of a hollow cone while the lower working part is made in the shape of a conical disc and mounted on the base of a hollow cone with its summit located within the hollow cone, a zone of crushed material circulation is formed above the conical disk wherein the pieces of the material travel relatively to each other, interact with each other and are crushed by means of friction, colliding and chipping forces. As a result, an active self-crushing of the solid material occurs in the zone of circulation, and the crushing efficiency sufficiently increases.
According to another embodiment of the invention, a centrifugal grinder is provided which comprises a body with loading and unloading devices, upper and lower working parts which are mounted on the body being capable of rotation in opposite directions about the vertical axis and forming between each other a working chamber with an annular unloading aperture. The upper working part is made with an axial loading aperture. According to this embodiment of the invention, the said upper and lower working parts are made in the shape of the hollow cones oriented in opposite directions with the base of each cone adjacent and spaced from the other cone to form the annular unloading aperture.
Because the upper and lower working parts are formed as how cones with their open ends or bases facing one another, a zone is created in the working chamber wherein an active process of solid material self-crushing is going on, since by supplying the solid material due to be crushed into the working chamber that is formed by the hollow reverse cones, the pieces of material, under the influence of centrifugal forces, travel from the centre to the periphery of the working chamber, reach the inner surfaces of the cones and under the influence of the tangent constituen
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Averochkin Evgeny Alexeevich
Kuchersky Nikolai Ivanovich
Lukyanov Alexandr Nikolaevich
Prokhorenko Gennady Alexeevich
Sytenkov Viktor Nikolaevich
Hail III Joseph J.
Hong William
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