Comminution
SAG / ball mill or rod mill circuits sized to your bond work index and target grind size. KCA designs around vendor mills and integrates HPGR upstream where the ore competency favors that flowsheet.
When ore is too fine, too refractory, or too high-grade for heap leaching, CIP (Carbon-in-Pulp) or CIL (Carbon-in-Leach) plants are the milling-circuit alternative. KCA has delivered CIP/CIL plants at scales from 200 TPD pilot (Itos, Bolivia) up to 20,000 TPD industrial (San Martin, Honduras). The Ocampo 1,500 TPD agitated leach (Mexico) is a classic mid-scale CIL reference.
SAG / ball mill or rod mill circuits sized to your bond work index and target grind size. KCA designs around vendor mills and integrates HPGR upstream where the ore competency favors that flowsheet.
High-rate or paste thickeners to dewater mill discharge before leach. Pre-leach oxidation circuits for slightly-refractory ores.
Multi-stage mechanically-agitated leach tanks with optimized residence time (typically 24–48 h depending on ore). Carbon-in-Leach configuration adds activated carbon to the leach tanks for continuous gold adsorption.
For CIP flowsheets, a separate adsorption train with countercurrent carbon transfer. CIL/CIP carbon loading optimized for the specific leach-solution grade and reagent regime.
Hydrochloric acid wash to remove calcium carbonate and base-metal contaminants before stripping. Pressure (AARL) or atmospheric (Zadra) strip configurations.
INCO SO₂/air or peroxide cyanide destruction. Tailings filtration or paste deposition. Reagent consumption matched to ore-specific testwork results from the KCA laboratory.
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