{"id":2982,"date":"2023-04-18T09:45:03","date_gmt":"2023-04-18T07:45:03","guid":{"rendered":"https:\/\/www.ctp.be\/expertises\/mineral-processing\/fragmentation\/broyage-cryogenique\/"},"modified":"2024-05-30T15:16:55","modified_gmt":"2024-05-30T13:16:55","slug":"cryogeniccrushing","status":"publish","type":"page","link":"https:\/\/www.ctp.be\/en\/expertise\/mineral-processing\/sizereduction\/cryogeniccrushing\/","title":{"rendered":"Cryogenic crushing"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text]Cryogenic crushing<\/strong> is applied to deformable materials with elastic or ductile behaviour, such as plastics or polymers, metals or organic compounds. It allows their micronisation where other techniques (shredding, granulation) are limited.<\/p>\n

It requires the cooling of the materials below their glass transition temperature (often lower than -100\u00b0C), which makes them fragile (\u2018brittle\u2019) and thus suitable for a milling via a technique operating by means of compression or percussion\/shock. It is carried out by making the materials transit through a screw cooled by liquid nitrogen before the actual milling.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column]\n

\n \n\n \n \n \n \n \n \n \n
\n Internal diameter <\/td>\n \n <\/td>\n \n 160 mm <\/td>\n <\/tr>\n
\n Nitrogen injectors <\/td>\n \n 4 injectors <\/td>\n <\/tr>\n
\n Nitrogen pressure <\/td>\n \n 2 to 4 bars <\/td>\n <\/tr>\n
\n Nitrogen consumption <\/td>\n \n around 100 litres\/h <\/td>\n <\/tr>\n
\n Nitrogen reserve <\/td>\n \n 1000 litres <\/td>\n <\/tr>\n
\n Feed size <\/td>\n \n < 25 mm <\/td>\n <\/tr>\n
\n Feed rate <\/td>\n \n around 200 kg\/h <\/td>\n <\/tr>\n <\/table>\n<\/div>