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 FURNACE BAGHOUSE OFF GAS SODIUM CARBONATE SILO SUPPLY WATER FROM ARSENIC PRECIPITATION CIRCUIT 1 2 3 4 5 Figure 8 – Integrated flowsheet: GlassLock 4.3 Environmental and Economic Considerations Both approaches produce a stable, non-hazardous glass, eliminating long-term arsenic liability. Pyrolysis is best suited for solid residues with high arsenic and valuable metals, while precipitation is ideal for large-volume, low-solid, arsenic-rich process streams. Both processes are compatible with existing mining infrastructure and can be integrated into closure or ongoing operations. 5. CONCLUSIONS Both pyrolysis and precipitation, when coupled with the GlassLock Process™, achieve >99% arsenic removal and produce environmentally compliant, stable glass products. Pyrolysis is optimal for solid, arsenic-rich concentrates, enabling further metal recovery. Precipitation is highly effective for treating large volumes of arsenic-laden process solutions. The GlassLock Process™ is scalable and provides a permanent solution to arsenic management in mining.
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