Small Scale Mining
Artisanal & Modular Skid-Mounted Gold Plants
Engineered for artisanal cooperatives and small concession holders requiring high-efficiency modular CIP/CIL gold extraction with low initial capital and rapid on-site commissioning.
Operational Architecture & Mineralogy Fit
Small-scale mining operations in East Africa frequently lose over 40% of their gold value through mercury amalgamation or rudimentary vat leaching. Green Ngoria’s modular skid-mounted CIP/CIL systems provide industrial-grade recovery kinetics without the burden of extensive civil foundations. Pre-fabricated, pre-piped, and tested in our workshops, each modular plant is delivered to site and commissioned within weeks.
Step-by-Step Mineral Extraction Flow
How ore advances through crushing, closed-circuit milling, agitated leaching, carbon adsorption, and final gold bullion smelting.
Primary Crushing & Comminution
Ore is crushed to -15mm via a rugged jaw crusher and fed to the ball mill for wet grinding to 80% passing 75 microns.
Gravity Gold Concentration
Coarse free gold particles are immediately recovered in a centrifugal concentrator before cyanidation to prevent delayed leaching.
Continuous CIL Leaching Train
Slurry flows by gravity through 4–6 cascade tanks where sodium cyanide dissolves gold and premium activated carbon adsorbs the gold-cyanide complex.
Elution, Electrowinning & Bullion Pour
Loaded carbon is harvested, stripped in a Zadra elution column, electroplated onto stainless steel cathodes, and smelted into gold bullion on site.
Core Equipment Package Included in This Tier
Every mechanical component is fabricated with high-wear metallurgy and pressure-tested before shipment.
Rubber-lined drum, continuous discharge, 15–37 kW motor drive
4–6 modular steel tanks (10–25 m³ each) with dual hydrofoil agitators
Semi-continuous batch centrifugal bowl, 95%+ recovery of free gold
High-temperature pressurized elution vessel with 300A electrowinning cell
Technical Parameters & Operating Specifications
Comminution & Grinding
Leaching & Extraction
Power & Water Utilities
Artisanal Cooperative Transition to Skid CIP
The Operational Challenge: Local artisanal operators were recovering only 54% of gold using sluice boxes and mercury, leaving over 2.4 g/t Au unextracted in tailings.
Green Ngoria Solution: Installed a turnkey 25 TPD modular skid-mounted CIL plant with gravity concentrator and batch elution circuit in 28 days.
Certified Engineering Deliverables Included
Every plant installation is backed by bankable engineering documentation, structural calculations, and certified commissioning certificates.
Consult for Small Scale Mining
Have an active deposit or operational challenge? Connect with our chief process engineer for preliminary sizing and budget estimates.
