Case

/

/

1800 TPD Flexible CIL/CIP Gold Processing Plant

Raw Ore: Transitional & Oxide Gold Ore (with minor sulfides)

Feed Gold Grade: 2.5 g/t

Final Product: Gold Doré Ingot

Gold Purity: ≥ 99.5%

Gold Recovery Rate: 95.5%

Capacity: 1800 tons per day

Work Scope: EPC (Engineering, Procurement, Construction), Commissioning & Training

Here are some photos of the project, click on the small picture to view the large picture.

Below are some ways to handle this plan. If you want to get a more detailed plan, please click the button to contact us.

Crushing & Stockpiling:

Flow: Three-stage crushing (Jaw Crusher + Cone Crusher + Cone Crusher) in closed circuit with vibrating screens.
Product: Crushed ore ≤ 12 mm.

Pre-Concentration (Optional By-pass):

Equipment: Knelson Concentrator (installed in the grinding circuit cyclone underflow).
Function: Recovers coarse free gold (>20μm) prior to leaching, reducing gold lock-up in circuit and enhancing overall security.

Gold Recovery & Refining:

Loaded Carbon Treatment: Acid washing column to remove carbonates.
Elution & Electrowinning: Pressurized Zadra/AARL elution column to strip gold from carbon. Gold is then deposited onto cathodes in the electrowinning cell.
Smelting: Cathode sludge is dried and smelted in an induction furnace with fluxes to produce doré ingots.

Dual-Mode Flexibility: The same tank series can operate as either CIP or CIL, providing operational adaptability to changing ore types without hardware modification.
Enhanced Security & Recovery: Integration of a gravity concentration circuit upstream of leaching captures coarse gold early, minimizing “preg-robbing” and improving overall financial security.
Optimized Leaching Kinetics: Oxygen injection and tailored cyanide dosing strategy, controlled by an online cyanide analyzer, maximize dissolution rates and reduce reagent consumption.
High-Efficiency Elution: Closed-loop, high-temperature elution system ensures high stripping efficiency (>98%) and low carbon inventory.
Comprehensive Environmental Control: Integrated cyanide destruction and tailings dewatering system ensures compliant discharge and facilitates dry stacking for reduced environmental footprint.

Grinding & Classification:

Flow: Two-stage ball mill grinding (primary overflow ball mill + secondary regrind ball mill) in closed circuit with a hydrocyclone battery.
Target: Grind size P80 = 75 μm for optimal gold liberation.

Leaching & Adsorption (CIL/CIP Circuit):

Design: Flexible 7-tank cascading agitation tank series.
CIP Mode: Used for finer, pre-oxidized ore. Leaching occurs in initial tanks, followed by carbon adsorption in later tanks.
CIL Mode: Used for standard oxide/transitional ore. Activated carbon is added directly to all tanks, allowing simultaneous leaching and adsorption.
Equipment: High-efficiency dual-impeller agitators, inter-stage screens (carbon safety screens), carbon transfer pumps, oxygen sparging system.

Carbon Regeneration & Tailings Treatment:

Carbon Regeneration: Rotary kiln to thermally reactivate stripped carbon.
Tailings Management: Cyanide destruction (SO₂/Air process) in a dedicated reactor, followed by thickening and filtration for dry stack disposal.