Projects
Nickel Acid Leaching Plant
Nickel Atmospheric Acid Leaching Processing Plant
Where We Are?
Kolaka City, Southeast Sulawesi Province, Indonesia
Project Site Area
A Total Of
12
hectare
*Land clearing completed
Strategic Location with Connectivity
National Road Access
Jetty (5 km)
Water Source for Operation from a River Near the Site
Airport (60 km)
Production Capacity
4000
MTPA (as Ni 99% Base)
6320
MTPA (as Ni (OH)2)
By-products
69,487
MgO
85,187
Iron Oxide
127,260
Silica
Input Capacity
Laterite Nickel Ore (Ni ± 1.3%)
435,800 MTPA (Wet Feed Ore Base)
435,800 MTPA (Wet Feed Ore Base)
Advancing Nickel Extraction with Atmospheric Acid Leaching (AAL) using Hydrochloric Acid (HCl)
EPCC
32
Months
(20 months for construction)
Operation
20
Years
Plant Unit Installed
Integrated Nickel AAL Processing System
Slurry Leaching & HCl Recovery System
Indirect Heating Rotary Kiln System
Building and Support Facility
Raw Material Feeding System
Package Equipment
Purification System
Utility Facilities
Comparison of Nickel Extraction Process
| Smelting | HPAL (High Pressure Acid Leach) |
AAL (Atmospheric Acid Leaching using HCl) |
|
|---|---|---|---|
| Raw Material | Sulfide ore | Laterite Ore | Laterite Ore |
| Technology | Production of ferronickel by smelting / reduction process | Nickel concentrates by acid leaching at high temp. (250~270 °C), high press. (40~50 bar) | Nickel concentration and other product from waste at atmospheric pressure and normal temp. (AMB~80 °C) |
| Process | Nickel ore → Drying → Preliminary reduction → Melting furnace (>1,500 °C) → Reduction → Separation of FeNi & Slag → Refining → Casting → FeNi | Nickel ore → Water mixing → Autoclave → Neutralization → Precipitation of sulfide metal → Autoclave → Solvent extraction → Autoclave (hydrogen reduction) → Ni powder | Nickel ore → Acid leaching → 1st purification → 2nd purification → Highly concentrated Ni, Nickel Hydroxide |
| CAPEX | 400 | 200 | 100 |
| Final Product | Fe-Ni | Ni metal | Nickel Hydroxide, Iron Oxide, SiO₂, MgO |
| Purity of final nickel related products | Fe-Ni: 20% | Nickel Metal: 99% | Nickel Hydroxide: > 90% Nickel Sulfate: 99.9% |
| Key Features |
Initial TIC: Very high Operating Power: Very High Operation Steps: Simple By-Products: Low |
Initial TIC: High Operating Power: High Operation Steps: Complicate By-Products: Low |
Initial TIC: Low Operating Power: Low Operation Steps: Simple By-Products: High |
| Energy Consumption & Emissions | High | Middle | Low |
| Wastewater & Waste | Fe-Ni Slag (>90% of feed) & Many wastewater | Many acidic wastewater | Waste-free process. ZLD (Zero Liquid Discharge) |