Method for industrial production of especially fine powders

Details Method for industrial production of especially fine powders Method for industrial production of especially fine powders

B - Operations, Transporting

02

C

B02C 19/06 (2006.01) B02C 23/12 (2006.01)

Patent

CA 2631314

A method for industrial production of especially fine powders and mineral powders, where the material to be ground is mixed to a gas-solid matter suspension, which through acceleration nozzles (12) is led at least to two counter jets, which meet in grinding chamber (13) for further grinding of the powders. The ground gas-solid matter suspension is led in its turn by means of working gas at least to two intermediate containers (2a);(2b) in the grinding circulation, in which containers the gas is removed from the mixture and into intermediate container (2) a certain quantity of solid matter is collected, which quantity is returned to be ground and led to the other container (2) and the said quantity is circulated through the grinding process among intermediate containers (2a);(2b) until in some container the quality is established sufficient for removal off the process.

L'invention concerne un procédé pour la production industrielle de poudres et de poudres minérales particulièrement fines, la matière à broyer étant mélangée à une suspension de matière solide dans du gaz, laquelle est amenée en passant par des buses d~accélération (12) vers deux jets à contre-courant, lesquels se rencontrent dans une chambre de broyage (13) pour broyer encore les poudres. La suspension de matière solide dans du gaz broyée est amenée à son tour au moyen du gaz vecteur vers au moins deux cuves intermédiaires (2a),(2b) situées dans la boucle du broyage, dans lesquelles cuves le gaz est enlevé du mélange et dans une desquelles cuves (2) une certaine quantité de matière solide est recueillie, laquelle quantité est renvoyée pour être broyée et amenée à l~autre cuve (2), ladite quantité circulant dans le procédé de broyage entre les cuves intermédiaires (2a),(2b) jusqu~à ce que dans une certaine cuve la qualité soit établie comme étant suffisante pour l~enlever du procédé.

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