Abstract
The Conjugate Anvil Hammer Mill (CAHM) is a patented, platform technology that includes two variants designed to work together to not only significantly reduce energy consumption and corresponding Green House Gas (GHG) generation in grinding but also greatly simplifies the grinding flowsheet. The CAHM Mark 1 ported variant, with its higher rock size reduction ratio, is designed to replace SAG mills and/or High-Pressure Grinding Rolls (HPGR) and provide feed directly into the MonoRoll designed to replace conventional balls mills. These two machines, when working together, are intended to eliminate the need for conventional pebble crushers and other auxiliary equipment. This circuit simplification further reduces energy consumption, GHG generation, maintenance, capital, and operating costs all while improving safety through reduced dust generation.
This transportable pre-commercial CAHM Mark 1 Prototype can process >60 TPH, weighs 27 tonnes and has a footprint of 8.5 m x 4 m x 6 m while the MonoRoll is a retrofit of a 2 TPH pilot scale Ball Mill. Both CAHM and MonoRoll were imagined, modelled, and designed by Lawrence Nordell and the team at CTTI as part of a CMIC-lead industry consortium that includes support from 7 major mining companies and financial assistance from NRCan and Quebec Innove. This presentation will discuss the results achieved from the large-scale pilot scale testing of these machines and plans for future mine site demonstration testing.