Method and apparatus for regenerating and reactivating cement

Details Method and apparatus for regenerating and reactivating cement Method and apparatus for regenerating and reactivating cement

1979-06-06

1981-05-26

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

Miscellaneous

241101D, 241261, B02C 704

Patent

active

042693632

ABSTRACT:
A method of regenerating and reactivating inactive cement is disclosed. The method is performed in a disintegrator which includes a pin mill having beating pins arranged on two parallel counterrotating grinding disks in concentric alternating rings of increasing diameter. Inactive cement particles of a grain size of 7 to 10 mm are subjected to 3 to 8 mechanical beats within a time period of 0.01 to 0.001 seconds in the disintegrator and broken into separate particles of the original fineness or finer. In this manner, the separate particles are released from hydrated surface layers the cement particles thereby liberating non-hydrated layers.

REFERENCES:
patent: 1215424 (1917-02-01), Spensley
patent: 1724072 (1929-08-01), Daniels
patent: 2090363 (1937-08-01), Wendeborn
patent: 2623700 (1952-12-01), Scherer
patent: 2641453 (1953-06-01), Teale
patent: 3972724 (1976-08-01), Entzmann
patent: 4177052 (1979-12-01), Entzmann

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