1 MTPA Portable Heap Leach Agglomerating, Conveying and Stacking System

QUEENSLAND, AUSTRALIA

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1 MTPA Portable Heap Leach Agglomerating, Conveying and Stacking System

queensland, Australia

this plant has been sold

located at

Mount Isa

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Summary Overview

Used 1 MTPY Modular Heap Leach Preparation Conveying and Stacking System: - Location – Queensland, Australia

Summary Description:

One (1) each USED 1 million tonnes per year (nominal) preparation, conveying and stacking system.

System comprises stationary agglomerating plant, multiple wheel-mounted “grasshopper” conveyor modules, track-mounted boom stacker, with steerable long-travel, slewing, luffing and shuttling motions.

Entire system is powered by boom-stacker’s on-board Diesel genset and controlled system via on board operator cab.

Boom stacker is semi-automated; travels and maneuvers on 6 each –excavator-style 600 mm wide x 6m centers crawler track units, each hydraulically powered by stacker’s hydraulic system. The boom stacker is a mobile machine supported on six (6) crawler track assemblies. It is self powered, can long-travel, steer, slew, luff and extend its boom to stack crushed ore in a stockpile up to 50 m wide and approximately 10 m high. The machine normally operates under operator control from an on-board control cab.

Stacker slews up to 90 deg each side of center, and luffs to stack windrows with lifts up to 10m high. It was designed to operate on crushed copper ore in a retreating “crescent” windrow-stacking mode, with heap leach pad approximately 50 m wide and about 10 m high. Boom maximum outreach, approx. 40 m from center line of slew deck to discharge point. (All dimensions approximate). Power feed to entire system is supplied by 415 v 50 hz via on board 350 KVA Diesel Genset.

Brief History:

The stacking system was commissioned at the Mt Cuthbert copper SX-EW plant facility approx. 180 km northeast of Mt Isa, Queensland in 2007, operating at about 1-1.2 million TPY of ore feed.

The facility was closed due to financial problems in 2008. The heap leach stacking system has not been operated since about 2011. According to the present owner, the equipment had only worked for around 15 months since commissioning.

The heap leach preparation and stacking system was purchased by present owner in 2018. It was dismantled and moved to Mt Isa for storage and later re-deployment in the 2nd half of 2018.

More information

Scope of Supply

Heap leach Boom Stacker

The boom stacker consists of the following major components:

  • Main frame supporting structure incorporating luffing boom support pivot, mast for yard lighting, support for hydraulic cylinders, hydraulic power unit, diesel generator set, power and control cabinets, operator control cab. Frame is supported at stacker feed end by an excavatorstyle slewing crawler track assembly, and at the discharge end by a fixed crawler track assembly.
  • Fixed long-travel crawler track assemblies One (1) set of two (2) x 600 mm wide x 3.9m centers, equipped with tracks integral hydraulic reducer sprocket drives, idlers androllers.
  • Slew able long-travel excavator-style crawler track assemblies One (1) set of two (2), 600 mm wide x 2.85 m centers, equipped with tracks, integral hydraulic reducer sprocket drives, idlers and rollers.
  • Slewing drive track assemblies One (1) set of two (2) hydraulically supported, angled 600 mm wide x 2.85m centers with supporting frames and hydraulic cylinders. Equipped with tracks, integral hydraulic reducer sprocket drives, idlers and rollers.
  • Stacker conveyor boom structure – Luffing box-section, approx. 31.5m long, incorporating 31m long x 900 mm wide boom conveyor with 15 KW Drive, hydraulically-driven shuttling “stinger” conveyor 750 wide by 8.5m m long, operator control cab, walkways feed chute and liners, idlers, take-up head pulley, belt cleaners, walkways and handrails.
  • On board Main hydraulic power system with 75 kw motor, powering all cylinders, hydraulic track motors, and boom shuttle conveyor hydraulic motor on the stacker
  • Hydraulic cylinders 2 x boom luffing, 2 x slewing track lift, 2 x steering.
  • Shuttle chain drive system with gearmotor, sprockets layshaft and chain
  • On-board Diesel Generator set – Cummins- 350kVA (390kVA stand-by) . Voltage 50 hz 415v (also potentially 480 v 60 hz) . Provides power to all the heap leach stacking system.
  • Operator Control cab air conditioned, enclosed Caterpillar control cab mounted on stacker boom, with functional control panel.
  • On-board MCC control panels and PLC. On machine containing all onboard controls PLC’s, MCC’s for boom conveyors, control/communication equipment, small light &power,
  • Yard flood lighting for 24-hour operation.
  • Field Devices: Quantity of field devices such as limit switches, encoders, lanyard switches, floodlights, walkway lighting, solenoid valves
  • Cabling Existing field power and control cabling on machine was tagged and disconnected and coiled for dismantling and transport by Owner stored in container

Modular conveyors

  • One (1) each Type-1 stacker feed conveyor with 65 x 65 RHS warren-truss framing, approx. 20m long pulley centers x 750 wide belt with 11 kw shaft mounted drive. Connected to and supported by rotating feed chute on stacker boom conveyor via a slewing ring. Equipped with feed Chute approx. 6m long to accommodate movement of stacker. Feed end is supported by skid. [(units are stored sectioned into 2 units with belt removed and rolled up)
  • One (1) each Type-1 mobile transfer conveyor with 65 x 65 RHS warren-truss framing, approx. 20 m long pulley centers x 750 wide belt with 11 kw shaft mounted drive. Supported by single wheel axle at 1/3 point. Transfers ore from “grasshopper” modular conveys to stacker feed conveyor. (units are stored sectioned into 2 units with belt removed and rolled up)
  • 15 each (approx.) mobile modular conveyors (type-2), 30 m long x 750 wide with 11 kw shaft mounted drive and guards. Supported by truck type dual wheeled axle at 1/3 point. (Units sectioned into 3 pcs for transport). Truss construction, with 200 channel and 75 x 75 angle sections with bracing. Units have been reinforced by unpainted 65 x 65 RHS sections. (units are stored sectioned into 3 units with belt removed and rolled up
  • 1 each mobile modular conveyor (type-4), approx. 34 m long x 750 wide with 11 kw shaft mounted drive and guards. Supported by truck type dual wheeled axle at 1/3 point. (Units sectioned into 4 pcs for transport). Truss construction, with 200 channel and 125 x 75 angle sections with bracing. (units are stored sectioned into 4 units with belt removed and rolled up
  • Note only 12 each dual wheeled axles present for types 2 & 4 conveyors (some are without axles).

Agglomerator discharge conveyor

  • 1 each Type-3 fixed conveyor (UB construction) 26m long x 900 wide with 25 kw shaft mounted drive discharge guards and walkways. (main unit stored in 2 sections)

Agglomerator feed bin:

  • Rectangular surge bin 3490 x 4815 x 2450 high with pyramidal cone discharge transition for feeding with vibrating feeder (feeder unit missing). (Total capacity approx. 55 m3 or 100 tonnes @ 1.8 t/m3) [Bin stored in 2 sections]

Agglomerator:

  • Drum and drives 1 each rotating, agglomerator drum 2.4 m diameter by 7.5 m long. Drum rubber lined for corrosion and wear resistance. Liners and lifters vulcanized to drum. Drum is supported on six urethane-tire rollers. Four of the six rollers are driven by shaft-mounted 15 KW motor-reducer units mounted directly on the rollers. Motors powered via variable frequency speed drive unit located externally in the switch room. Drum stored in 1 section)
  • Main Frame drum and rollers are supported on an adjustable slope subframe, mounted on main frame with walkways stairs and guards. Subframe allows the slope of the drum to be adjusted to vary the residence time of material passing though the Agglomerator (Frame stored in 1 section with rollers and drives mounted, motors removed. Walkways and stairs, motors stored separately).
  • Chutes Agglomerator feed and discharge chutes stored separately

Agglomerator feed conveyor

  • 1 each Type-3 fixed conveyor (UB construction) 26m long x 900 wide with 25 kw shaft mounted drive, feed chute, guards, chute and walkways. (stored in 2 sections)

Switchboard container:

  • Low Voltage Main Switchboards, PLC, and variable frequency drive unit for agglomerator installed in shipping container.

Storage container:

  • Containing field cabling for conveyor and sundry junction boxes, electrical components and spares

Dismantling and Storage:

  • All of the equipment has been dismantled into road-transportable pieces and is now stored in Mt Isa, Queensland Australia.

Technical specifications drawings and manuals.

  • These have NOT been located.
  • Some sketches have been made of dismantled units as they are in the storage yard.
  • Equipment and electrical cables have been marked for reassemble

Specific exclusions from Scope of Supply:

  1. Upstream and downstream equipment
  2. Further dismantling, packing for sea transport, containers, loading and transport to new site
  3. Refurbishing
  4. Power and field cabling (other than specified above).
  5. Installation and installation supervision.
  6. First fill lubricants
  7. Sundry electrical field devices such as some lighting, lanyard switches, cable and the like (not identified)

Price Basis: Ex Works (+GST if applicable) “as is where is” laydown yard, Mt Isa, Queensland, Australia.

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