Patent ID: 7931220

Claim:
An apparatus for manufacturing a pozzolanic white glass powder from a stream of post-consumer waste glass containing items of non-frangible materials, comprising: a) equipment for pulverizing the stream in a manner such that consumer waste glass in the stream is reduced to fragments of an average maximum size, while non-frangible items are not reduced to said size; b) equipment for performing a size-based separation of the reduced glass fragments from the non-frangible items; c) equipment for washing the reduced glass fragments; d) equipment for drying the washed glass fragments; and e) a mill for grinding the dried glass fragments into a white powder, said mill having a non-metallic surface lining a grinding chamber of said mill such that the dried glass fragments and the white powder are in contact with said non-metallic surface of said mill while said mill is grinding the dried glass, wherein said non-metallic surface does not impart a non-white discoloration to the white powder during grinding.