Bottom-blown oxygen converter

Figure 1. Drawing of a BBOC mounted on its tilting frame

The Bottom-blown Oxygen Converter or BBOC is a smelting furnace developed by the staff at Britannia Refined Metals Limited (“BRM”), a British subsidiary of MIM Holdings Limited (which is now part of the Glencore group of companies). The furnace is currently marketed by Glencore Technology. It is a sealed, flat-bottomed furnace mounted on a tilting frame that is used in the recovery of precious metals. A key feature is the use of a shrouded lance to inject oxygen through the bottom of the furnace, directly into the precious metals contained in the furnace, to oxidize base metals or other impurities as part of their removal as slag.[1]

  1. ^ J M Floyd, “Submerged bath smelting applied to the non-ferrous metal industry,” in: The Paul E. Queneau International Symposium, Extractive Metallurgy of Copper, Nickel and Cobalt, Volume I: Fundamental Aspects, Eds R G Reddy and R N Weizenbach (The Minerals, Metals and Materials Society: Warrendale, Pennsylvania, 1993), 473–488.