Setting up a gold mining processing plant requires careful planning, selection of appropriate equipment, and adherence to regulatory and environmental standards. Below is a step-by-step guide to the equipment setup for a typical gold processing plant:
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1. Ore Receiving & Crushing
– Primary Crusher (Jaw or Gyratory Crusher): Reduces large ore chunks to smaller pieces (~6-10 inches).
– Secondary Crusher (Cone Crusher or Impact Crusher): Further crushes ore to finer sizes (~1-2 inches).
– Screening Unit (Vibrating Screen): Separates crushed material by size for efficient grinding.
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2. Grinding & Milling
– Ball Mill or SAG Mill: Grinds crushed ore into fine powder (~75-150 microns) to liberate gold particles.
– Cyclone Classifier: Recirculates oversized particles back to the mill for further grinding.
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3. Gravity Separation (Optional)
Used for coarse gold recovery before leaching:
– Shaking Tables or Spiral Concentrators: Separate heavy gold particles from lighter gangue.
– Centrifugal Concentrators (e.g., Knelson/Falcon): High-G force recovery of fine gold.
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4. Leaching & Adsorption (For Free-Milling Gold)
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# (a) Carbon-in-Leach (CIL) / Carbon-in-Pulp (CIP) Plant
– Leaching Tanks: Ore slurry is mixed with cyanide solution to dissolve gold.
– Activated Carbon Columns: Gold-loaded carbon is separated from slurry.
– Electrowinning Cell: Extracts gold from carbon onto steel wool cathodes.
# (b) Heap Leaching (For Low-Grade Ores)
– Ore Stacking System: Ore is piled on lined pads.
– Sprinkler System: Distributes cyanide solution over the heap.
– Pregnant Solution Pond: Collects gold-rich solution for further processing.
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5. Flotation (For Sulfide Ores)
– Flotation Cells: Chemicals are added to separate sulfide minerals containing gold from waste rock.
– Thickener: Concentrates the flotation slurry before leaching.
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6. Smelting & Refining
– Furnace (Induction or Reverberatory): Melts gold concentrate into doré bars.
– Electrolytic Refining Cell (e