Mar 17, 2017 . The invention of the Dorr thickener made possible the continuous . Scraper blades or rakes, driven by a suitable mechanism, rotating slowly over mill superintendent of the Chesterville Mines, Ltd. A water soluble H.V..
McLanahan High Rate Thickeners, or Clarifiers, recover immediately . for mineral and aggregate producers, as well as environmental contractors. . Rotating rake arms collect settled sludge and move it toward the center discharge cone.