Importance

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Abstract

An agitator mill has an arrangement for diminishing the pressure of the attritive elements towards the outlet. This arrangement comprises particularly means for generating a force pointing away from at least one separator opening forming a passage for the product, but retaining the attritive elements within the milling container. This force affects substantially selectively only the attritive elements. According to one embodiment, this force acts upon the attritive elements in counter-direction to the direction of flow of the product. The force may either be a centrifugal force acting selectively onto the relative large mass of the attritive element or a magnetic force acting selectively upon steel balls, iron balls or the like used as attritive elements. According to a further embodiment the separator opening is defined exclusively by surfaces of a rotary body in order to generate a centrifugal force, with this opening having a larger cross-section than the corresponding maximum size of the attritive elements. The separating device may have a rotary body within the range of a device for varying the volume of the milling container and therewith the pressure of the attritive elements therein. This rotary body may be supported by the piston of said varying means.

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First Claim