Apparatus for crushing material containing particles that are hard to pulverize
AssigneePolysius AG
InventorsPeter Tiggesbaumker, Ludger Lohnherr
Life of this patent
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Abstract
The invention concerns an apparatus for crushing, by means of a rotary mill, material containing particles that are difficult to pulverize. The mill has an air-sifter with pneumatic supply of ground material, where the coarse-material discharge of the air-sifter is connected to the intake side of the mill, and has a mechanical conveyor whose intake side is connected to the coarse-particle discharge of the mill and whose discharge is connected to the intake side of the mill.
Claims14
A rotary mill for crushing material containing hard to pulverize particles, said mill having a material intake, a fine particle outlet, and a coarse particle outlet;
- means for supplying to said intake material to be ground;
- means for grinding said material;
- pneumatic means for separating coarse and fine particles from the ground material and discharging fine particles through said fine particle outlet and discharging coarse particles through said coarse particle outlet;
- conveyor means for receiving discharged coarse particles and conveying them to said intake;
- and coarse particle removal means interposed between said outlet and said intake for removing a selected fraction of said coarse particles.
A rotary mill for crushing material containing hard to pulverize particles, said mill having a material intake, a coarse particle outlet at a lower level of said mill, and a fine particle outlet at an upper level of said mill;
- means for supplying to said intake material to be ground;
- means for grinding said material;
- pneumatic means for separating coarse and fine particles from the ground material and discharging fine particles through said fine particle outlet;
- means for discharging coarse particles through the coarse particle outlet;
- conveyor means for receiving discharged coarse particles and conveying them to said intake;
- and coarse particle removal means interposed between said coarse particle outlet and said intake for removing a selected fraction of said coarse particles discharged through said coarse particle outlet.
Dependencies are inferred from the claim text.