B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
B02C 23/00 (2006.01) B02C 19/18 (2006.01) B02C 23/12 (2006.01) B02C 23/18 (2006.01) B02C 23/22 (2006.01) B02C 23/32 (2006.01)
Patent
CA 2183175
The invention relates to a process and an apparatus for grinding and sifting a product, in which the product is embrittled by a coolant and is comminuted in a mill, the comminuted product being fed, after comminution while keeping away ambient air and the moisture this involves, to a sifter. With the process and the apparatus according to the invention, the product can be comminuted and sifted in a closed-loop process without separating agents having to be fed to the ground product prior to sifting to overcome electrostatic charging. The sifter is preferably operated with the gaseous coolant which is used to operate the mill so that any losses of sifter circuit gas occurring during sifting can be compensated by feeding in a gaseous coolant. The total duration of the process can be reduced considerably.
Dietrich Oliver
Duesberg Wilfried
Stahl Manfred
Borden Ladner Gervais Llp
Dietrich Oliver
Duesberg Wilfried
Messer Griesheim Gmbh
Stahl Manfred
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