4500 tpm CIL Containerized Plant

Modular Containerised Design

The entire plant is housed within standard shipping containers, consisting of a dedicated milling module and four integrated CIL agitation modules. This modular design enables rapid mobilisation, simplified transportation and fast site installation, significantly reducing project implementation timelines and infrastructure requirements.

Integrated High-Efficiency Milling Circuit

The milling module incorporates:

• 10-ton feed bin
• Automated screw conveyor feed system
• 2,500-litre slurry conditioning and de-clumping tank
• Trash removal screening system
• 55 kW stirred pin mill regrind circuit
• Dual centrifugal concentrators
• Integrated slurry transfer pumps

All components are designed to work seamlessly together as a fully integrated process plant, ensuring smooth operation and maximum throughput.

Engineered for Reliability

Every transfer point, chute, launder and process connection has been professionally designed using advanced CAD engineering software to optimise material flow.

Benefits include:

• Minimal spillages
• Reduced blockages
• Lower maintenance requirements
• Reduced operator intervention
• Increased plant availability
• Higher overall production efficiency

Variable Speed Process Control

The feed conveyor, regrind mill and slurry pumps are all controlled by Variable Speed Drives (VSDs), allowing operators to fine-tune process parameters in real time.

Advantages include:

• Optimised plant performance
• Improved recovery rates
• Reduced energy consumption
• Greater operational flexibility
• Enhanced process stability

Energy-Efficient Regrind Technology

The plant utilises a high-performance stirred pin mill operating with ceramic grinding media.

Compared to conventional ball mills, the pin mill offers:

• More than 40% lower energy consumption
• Superior grinding efficiency
• Improved liberation of gold particles
• Faster maintenance procedures
• Reduced downtime

Advanced Ceramic Grinding Media

The use of ceramic grinding media delivers significant operational advantages over traditional steel grinding balls.

Key benefits include:

• Up to 50% reduction in grinding media costs
• Extended media lifespan
• Reduced maintenance requirements
• Elimination of cyanide consumption caused by steel media
• Improved leaching efficiency and gold recovery

Enhanced Gold Recovery Through Gravity Concentration

Dual centrifugal concentrators are incorporated directly into the milling circuit to recover free gold immediately after liberation.

Benefits include:

• Increased overall gold recovery
• Immediate capture of coarse free gold
• Improved project cash flow
• Reduced gold losses to tailings
• Faster return on investment

Automated Concentrate Handling and Security

The gravity concentrators operate with automatic flushing systems, depositing concentrate into secure storage within the milling container.

This design:

• Eliminates manual cleaning
• Enhances operational security
• Reduces labour requirements
• Minimises gold theft risks
• Simplifies concentrate management

Low-Power, High-Efficiency Agitation System

The CIL section utilises specially designed high-efficiency impellers that provide excellent mixing performance with exceptionally low power consumption. Each compartment requires only 1.5 kW of power while maintaining effective suspension and carbon contact.

Resulting benefits:

• Lower operating costs
• Reduced generator requirements
• Improved leaching performance
• Lower carbon footprint

Simplified Maintenance Philosophy

The mixer drive systems utilise standard bearings, belts, pulleys and mechanical components that are readily available worldwide.

This approach ensures:

• Rapid maintenance turnaround
• Reduced spare parts inventory
• Lower maintenance costs
• Increased plant uptime

Industry-Leading Carbon Security

Security has been integrated into every aspect of the plant design.

Features include:

• Locked access points
• Fully enclosed carbon compartments
• Automated carbon transfer systems
• Secure concentrate storage
• Minimal manual handling

These measures significantly reduce opportunities for carbon losses or theft.

Automated Carbon Management

Carbon movement between compartments is performed automatically using dedicated carbon transfer pumps.

Advantages include:

• Improved operational efficiency
• Consistent carbon movement
• Reduced labour requirements
• Enhanced plant security
• Improved gold adsorption performance

Automated Carbon Cleaning and Recovery

Loaded carbon is automatically transferred to a dedicated carbon handling container where it is screened, cleaned and discharged directly into one-ton bulk bags ready for transport to the elution plant.

Benefits include:

• Elimination of manual carbon handling
• Improved safety
• Reduced contamination
• Enhanced security
• Streamlined logistics

Optimised CIL Flow Design

The short distances between compartments and strategically positioned carbon retention screens have been engineered to ensure reliable pulp flow and prevent common CIL operating problems.

This reduces:

• Tank overflows
• Carbon losses
• Blockages
• Downtime
• Process inefficiencies

Low Overall Power Requirement

The complete plant operates on less than 150 kVA of electrical power.

This allows:

• Smaller generator installations
• Reduced fuel consumption
• Lower operating costs
• Easier deployment in remote locations
• Improved project economics

Proven Operational Expertise

Every component has been selected and integrated by SA Autec's experienced engineering and operations team, based on extensive field experience in gold processing operations across Africa.

SA Autec also provides:

• Plant commissioning support
• Operator training
• Operational optimisation
• Technical assistance
• Ongoing process support

Strong Residual Asset Value

Unlike conventional fixed processing plants, the SA Autec Mobile CIL Plant remains a transportable and marketable asset. At the conclusion of a project, the plant can be:

• Relocated to a new operation
• Refurbished for continued use
• Sold into the secondary market

This provides significant capital recovery potential and improves overall project returns.