Heap Leach Systems

THE GLOBAL LEADER IN HEAP LEACH STACKING SYSTEMS

Our extensive experience and innovative designs make TNT’s mobile stacking systems the preferred choice for heap leach operations worldwide.

Our reliable and efficient heap leach stacking systems – including the portable grasshoppers and the fully mobile patented Super Portable® stacking systems – are robust and perfectly suited for the mining environment.

TNT custom designs and adapts our systems to meet your project’s unique requirements, helping reduce downtime, improve productivity, lower operational costs and minimise the environmental impacts of heap leach operations.

With experience delivering multi-lift heap leach systems operating at up to 10,000 tonnes per hour at thousands of meters above sea level, in temperature extremes ranging from -50°C in Siberia to +40°C in Saudi Arabia, and in a multitude of advance and retreat stacking arrangements – we can provide a heap leach stacking solution for your project.

CUSTOMISED HEAP LEACH STACKING SYSTEMS BUILT TO PERFORM

Our unrivalled expertise has seen TNT pioneer a host of innovative stacking and conveying solutions – including the world’s largest multi-lift heap leach stacking system in Chile featuring our Super Portable® mobile conveyor. This ingenious system has a capacity of over 8,500 metric tonnes per hour and features 27 pieces of equipment in a series across a 1.8 km wide pad at an altitude of 3,200m above sea level.

We also designed and installed the world’s first mobile High Angle Conveyor to move material up stacking lifts, and the first dual fully redundant multi-lift stacking system with 100% availability.

Our Super Portable® solutions offer superior flexibility and versatility, seamlessly interfacing with other mobile mining equipment and conveyors. Combined with our extensive global heap leach project portfolio utilising our Portable Grasshopper stacking systems, TNT are industry leaders in optimising mining operations for greater efficiency and productivity.

SINGLE SOURCE HEAP LEACH SYSTEMS

TNT has developed its own range of large capacity Agglomeration Drums to complement our stacking systems and improve heap leach recoveries, making us a heap leach materials handling ‘one stop shop’.

You can turn to TNT with confidence for your gold, copper or uranium heap leach heap project. We can design, supply and install a complete heap leach solution that will handle the mined ore from crushing and conveying, through to agglomeration and stacking.

Get in touch with our team today and experience the TNT difference.

BENEFITS OF TNT’S HEAP LEACH STACKING SYSTEMS

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Efficiency

Our Super Portable® systems use custom slider beds and automated stinger stacking methods to reduce movement and stacker cycles increasing operational efficiency.

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Less Downtime

Inherent redundancy provides unrivalled reliability and system availability ensuring production continues with minimal disruption while maximising production rates.

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Flexibility

Our self-driven mobile conveyors can be advanced or retreated, operate up multiple lifts, and interface between other types of mobile equipment and conveyors.

Fully Customisable

Add or remove stacking equipment to meet operational needs and negotiate complex topography and stacking area geometry for permanent pad and valley fill heap leach.

Improved Mine Safety

Removing haul trucks from site can improve the safety of personnel with less opportunity for safety incidences.

Less Maintenance

Our automated stinger stacking methods reduce track wear and maintenance costs up to 70% by comparison with standard systems.

Lower Operating Costs

High-capacity mobile Super Portable® conveyors reduce the number of trucks onsite, reducing associated labour, maintenance and infrastructure costs.

Lower Emissions

Less trucks onsite means lower CO₂ emissions and less dust pollution, helping you meet your sustainability targets.

INNOVATION THROUGH DESIGN

TNT was among the original developers of the mining “grasshopper” type heap leach stacking system. Today, we are the only operational heap leach specialist company that originally pioneered this type of mine duty heap leach stacking technology, which is still used predominantly in gold and lower capacity copper heap leach operations.

In the late 1990s, TNT responded to our clients’ needs for higher throughputs and operability of larger systems by developing our now-patented Super Portable® technology. These larger fully mobile conveyors are safer to use, improve operability, increase stacking efficiencies and reduce overall system downtime compared to other mobile systems.

Heap Leach Systems

Super Portable® System Technology

TNT’s patented Super Portable® system technology is the result of years of innovative design work that is revolutionising heap leach stacking systems. The technology provides unparalleled versatility and mobility, with the capacity to operate up to 10,000t/h.

Unlike other mobile conveyors on the market, our Super Portable® system is truly mobile. It is equipped with all-track propulsion and on-board generators, allowing rapid redeployment of the conveyors from cell to cell and lift to lift.

Adjusting your Super Portable® conveyors is quick and easy. Operating as a ‘plug and play’ system, conveyors can be added or removed in as little as 30-45 minutes (including system shut/restart) with minimal terrain preparation.

The Super Portable® conveyors also allow for superior directional movement including forward/reverse, side to side, crab walk, and rotate 360 degrees, offering the flexibility to meet your operational requirements.

Our highly experienced team will work closely with you to develop a system that fits your exact specifications, managing the entire process and throughput – from engineering and design, to fabrication, construction, transport logistics, onsite installation and commissioning.
Conventional Portable Heap Leach Technology

Our conventional portable conveyor system, commonly nicknamed “Grasshoppers,” typically range in design from 30″/750mm wide belts to 54”/1350mm wide belts and throughputs up to 3,000 t/h. As capacity increases beyond 3,000 t/h, portable conveyors are generally replaced by self-propelled Super Portables®, which are added or removed from the stacking line with less downtime.

Our Grasshoppers operate in much the same way as the Super Portable® system but are tyre mounted versus track mounted, making them suitable for smaller lower cost operations.
Agglomeration Drums

TNT compliments our world leading heap leach stacking systems with custom designed heavy duty agglomeration drums to improve efficiency and recoveries in gold, copper and uranium heap leach processes. The rotating drum introduces binding agents via spray bars to produce a more uniform homogenous material which starts the leaching process prior to stacking.

TNT’s heavy-duty standard drum diameters are 3.0m, 3.66m, 4.1m, or 4.6m in diameter and are driven using a robust girth gear and pinion arrangement required for high-capacity applications up to 4,000 tph. The electromechanical drives utilise VFD variable speed drives to allow speed range variance for refinement of the agglomeration process, improving the overall recoveries and efficiency of the heap leach process.