DEVICE AND METHOD FOR CRYOGENIC GRINDING WITH GRINDING MEDIA IN THE FORM OF SOLIDIFIED CRYOGENIC GAS

摘要

The main subject of the invention is a device (1) for cryogenic grinding of powders (P), characterized in that it comprises: a pressurized thermally-insulated grinding tank (2), comprising the charge of powders (P) to be ground, grinding media (Bo) in the form of solidified cryogenic gas and liquefied gas (GL); a drive shaft (30) for rotating the grinding tank (2); a laser particle size analysis device (3) associated with a backlighting device (4); a system (5) for generating and supplying powder/liquefied gas suspensions; a system (6) for processing data and controlling the grinding device (1), the laser particle size analysis device (3) being connected to said processing and control system (6), a device for producing grinding media (8) in the form of solidified cryogenic gas from cryogenic gas, and a device for the admission of liquefied gas and carbon dioxide.