Tube mill
AssigneeF. L. Smidth & Co.
InventorIb Hansen
Life of this patent
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Abstract
A tube mill for dry grinding of a granular material, the mill being formed with one or more grinding compartments charged with grinding bodies and, downstream of the first or sole grinding compartment, a relatively short compartment bounded downstream by a dam ring having a central opening and upstream by a sieving diaphragm for holding back the grinding bodies, but permitting fluidized ground material to flow from the upstream grinding compartment to the short compartment and vice versa, the short compartment being adapted to serve as a reservoir of fluidized ground material.
Claims18
A tube mill for dry grinding a granular material and the like comprising at least one grinding compartment charged with grinding bodies, a relatively short compartment positioned downstream of said grinding compartment and bounded on the downstream portion by a dam ring defining a central opening and on the upstream portion by a sieving means capable of retaining the grinding bodies in said grinding compartment, said short compartment being so configured to permit fluidized ground material to flow at least from the upstream grinding compartment to the short compartment, said short compartment having an intermediate plate defining upstream and downstream compartments therewithin, and at least one opening remote from the peripheral wall of the mill, said opening being positioned to correspond to the intended level of fluidized material in the upstream compartment of the short compartment and in the downstream grinding compartment, said upstream compartment of the short compartment being devoid of any lifters and said downstream compartment of the short compartment having lifting means, said lifting means being so configured as to assist in transporting the material from the downstream compartment of the short compartment into a downstream grinding compartment or out of the mill.
Dependencies are inferred from the claim text.