While they look about the same when completed in one of our manufacturing plants on the shop floor, Coarse Material Screw Washers and Blade Mills are different when installed in a washing plant.
Both Coarse Material Screw Washers and Blade Mills are used for washing rock and ore that have soluble mud and clay contaminants that can't be cleaned solely by a wet washing vibrating screen. How one is installed compared to the other depends on the downstream processing and if -4 mesh or 5mm fines need scrubbed or washed too.