TO ATM BATCH PLANT BAGHOUSE TO DRYER FURNACE BAGHOUSE TO DUST BIN E-22 MIXER BRIQUETTER Weighing Bin #1 COMPRESSED AIR NATURAL GAS OFF GAS DRYER NATURAL GAS ARSENIC GLASS TO STORAGE OXYGEN FURNACE OFF GAS DRY BRIQUETTES E-27 FURNACE HOOD DUST BIN FROM BAGHOUSES SILICA TAILINGS SILO Supply HEMATITE TAILINGS SILO Supply Weighing Bin #2 Weighing Bin #3 Weighing Bin #4 ARSENIC TRIOXIDE SILO (TBC) FURNACE BAGHOUSE OFF GAS SODIUM CARBONATE SILO Supply WATER FROM ROASTING CIRCUIT 1 2 3 4 5 Figure 5 – Integrated flowsheet: GlassLock processing plant In cases where arsenic is dissolved in a liquid, precipitation steps are performed to first reduce the acid concentration, as shown in Figure 6, and then to precipitate the arsenic, as shown in Figure 7. After precipitation, the resulting product, like the solid forms, is introduced into the GlassLock process to produce an inert, non-leachable glass, as illustrated in Figure 8.
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