Dozer Mining Unit Technology
Get your ore tested at GK’s sophisticated bulk ore screen proving facility in the USA and have a bankable pathway to a higher profit mine within weeks.
These machines have been progressively developed via a dedicated R&D program over several years, in consultation with highly respected senior mine personnel and leading industry power-houses.
A self-levelling (for prolonged spring life) low vibration two-mass screen (explanation at https://tinyurl.com/GK2mass), fed full width by a Transmin low profile belt-on-slat conveyor (click here for a 40 sec overview video), will provide automated density controlled slurry transport over long distances, with dozer cab process oversight via tablet. Our innovative CFD-proven live-bottom sump scavenging system eliminates slumping and density sensitivity of typical sumps, and facillitates a lower overall machine height. Video feeds of key operational locations provided to operators and remote. A quick-remove hopper is available for FEL or excavator use. Trash is easily dozer cleared and the 300mm ID lay-flat sump overflow hose is a simple one-person task to handle. All controlled from a fully insulated s/s switch room built to cool-room spec with a mine rated air-conditioner for maximum reliability in hot climates.
Fully modular design for rapid build and easy repair, protected by extreme environment glass plate epoxy (Interzone 954GF), shop tested to be transported around the globe in standard shipping containers for rapid assembly and commissioning. Local fabrication and assembly of some modules is available for suitable sites. Galvanised Victaulic pipework fittings, long life ceramic, bolted panel main feeder linings and UHMWPE chute linings, with auto-lube bearings used throughout to simplify maintenance. Stair / walkway access to all maintenance points.
Maintainability and availability are core engineering design concepts, built in from the ground up by personnel with decades of experience making operational equipment people love to own. You will too.
Pushed Skid Dozer Mining Unit (DMU)
(jump to Introductory Info,   Tracked DMU,   Stockpile Reclaim Dozer Trap, or  Dozer Pump Unit)OVERVIEW              (click here for .pdf copy of this info);
These economical dozer pushed skid mounted dozer traps will RELIABLY out-perform any other DMU of their type. The low feeder entry point increases average pushed t/m of dozer travel and reduces fuel consumption.
A two-skid configuration, easily aligned via a simple guide system to solidly slam the skids into place, and a pinned connector to keep it together in operation, or to perform a flat terrain move of both units simultaneously. Skids slide on 20mm Bisalloy 450 alloy steel plates, with any cavities sealed / filled with expanding polyurethane. And including extremely robust resin cored dry transformers, as preferred for draglines and other large mobile equipment due to safety and environmental benefits.
To relocate the DMU, it is as simple as unplugging the cables and hoses between the skids (dual plugged for simple maintenance of connectors), slide the security pins out of the considerably oversized engagement teeth holes, disconnect the slurry, water and power lines (unless onboard genset installed), then move the skids to their new location. The screen skid can tolerate up to 400mm out of level, and the feeder skid similar, so setting up is a breeze. This machine has been fully detail designed and is ready to build.
KEY PERFORMANCE SPECIFICATIONS
Annual Throughput:Â 13 mtpa (assuming 1 move every week, 1 dayshift maintenance a month and 7 day annual outage)
Capacity (max/nominal):  2,000 / 1,700 t/hr @1.6 bulk density, 2.6 SG (700 t/hr = 5.5mtpa and 950 t/hr = 7.5mtpa also available); Ambient de-rating:  >45o/C
Screening: GK 2.4m x 8.5m double deck two-mass screen handles rocks to -500 mm; (grizzly apertures 44 cm x 117 cm, 40mm bars; screen at -3.2 mm; -2 mm option)
Incoming Power: Ausproof safety plugged incoming 22 or 33 kV cable to ring main isolator surge protection (optional on-board genset), c/w lightning protection
Power Transformers: 1.6MVA 12-pulse 1,750V and 750kVA 415V robust (dragline spec) dry type transformers in a dual switchroom with 45kW Rinnai mine spec a/c
Slurry pump: Keto 16/14 (Hart / Warman option), with WEG 1,000 kW 3.3 kV VSD direct drive water cooled motor (950t/hr = 10/8, 500kW, 415V)
High pressure spray pump: Keto 10/8 (Hart / Warman option), with WEG 110kW SS belt drive (950t/hr = 8/6, 90kW)
Unladen mass: Screen Skid: 124t ;  Feeder Skid: 177t (add 5t for optional grizzly boom and 10t for optional hopper)
Unladen avg ground pressure:Â Â <28 kPa (feeder)Â ;Â <32 kPa (screen) (increases slightly with optional equip)
Noise Level:Â 60-65 dBA at 10m (less than 45 dBA at 100m) ; no equipment above 85 dBA at 1m in normal operation;
Feeder drive:Â SEW bevel helical gearmotor with dedicated oil cooler and 185kW VSD drive; 0.5m/s at max throughput
Feeder bed:Â 1,700mm wide (Transmin 2m belt-on-slats conveyor) x 600 mm deep (remotely adjustable up to 250 mm lower to suit weather / local ore characteristics)
Sump live volume:Â Â 20 m3 ; at 15 m3 working volume and 2,000 t/hr providing 23 – 34 seconds residence time for operational range of 45% to 55% w/w concentration slurries
Optional Grizzly Excavator Boom:Â For lump clay removal / push-through; quick-remove system
Optional FEL / Excavator Hopper:Â 50 m3 / 80t capacity;Â 10t mass, 25 mm thick UHMWPE bolted panel lining; chain slings; quick-remove system
Tracked Self-Driven Dozer Mining Unit (TDMU)
(jump to Introductory Info,  Pushed Skid DMU,  Stockpile Reclaim Dozer Trap, or  Dozer Pump Unit)
OVERVIEWÂ Â Â Â Â Â Â Â Â Â Â Â Â Â (click here for .pdf copy of this info;Â click here for comparison with other DMU’s and costing info)
“A sublime solution to problems that have beset the industry for decades” says one GM Ops. Well suited to continuous extraction of strandlines and especially helpful to chase fingers. Click here for an example of a block mine plan.
(Note: Painted and galv images are similar; galv images show preliminary switchroom, access and handrail systems whereas painted images show fully designed, FEA strengthening, plus dual transformer conversion and full containerisation of the machine)
Individually driven by high torque hydraulic motors, the TDMU’s ground engaging steerable tracks ensure it can negotiate tight terrain to maximise yields from large / complex mineral resources. The rear pair of tracks are centrally mounted, articulated and steerable, with the front tracks also articulated. This ensures excellent manoeuvrability and allows the TDMU to handle relatively uneven terrain (side stairs auto-lift up to maintain 600mm chassis clearance). Being tethered at up to a 500m working radius provides the flexibility to continuously recover large blocks or narrow tracts of resource, with quick change-over times to start up the next block / section. And they can climb 20 degree slopes, to simplify pit transitions. Powered by incoming HV via auto-tensioning cable reel, with a quick-remove piggy-backed mobile genset (or fixed if preferred) for travel off-grid.
Being relocatable in minutes, even with a full feeder, significantly increases average pushed t/m of dozer travel, resulting in greater productivity than multi-module DMU’s can achieve, and more consistent feed for a downstream concentrator plant. No delays for a second dozer, or difficulty pushing skids over moist surfaces. Comes complete with ground engaging hose termination anchor skid. This fully containerised machine has been structurally detail designed, passed FEA testing, and is ready to build.
KEY PERFORMANCE SPECIFICATIONS
Capacity: 2,000 t/hr max / 1,700 t/hr design nominal @1.6 bulk density, 2.6 SGÂ ;Â Â Â Â Ambient de-rating:Â Â >45o C
Annual Throughput:Â 14 mtpa (assuming 1 short move every 2 days, 1 dayshift maintenance a month and 7 day annual outage)
Screening: GK 2.4m x 8.5m double deck two-mass screen handles rocks to -500 mm; (Grizzly apertures 43 cm x 126 cm, screen at -3.2 mm; -2 mm option)
Laden Travel Speed (high / low): Â 1 km/hr (on flat) / 0.5 km/hr (on 20 deg incline / tight turning)Â Â ; Â Â Â Manoeuvrability: 50m turn radius; +/-5 deg articulation each track individually
Tracks: 1.2m wide x 6.9m long double grouser treads, all hydraulic motor driven   ;    Driving: Remote control, adjustable bias for hose towing
DN450 interchangeable 10m feed & slurry hoses: up to 2@500m (950m working range from included hose termination anchor skid)
Power supply: 22 or 33 kV x 1.6MVA (1.75kV) + 750kVA (415V) dual output KNAN transformers, reeled cable fed (450m max + plugged extensions) c/w ring main isolator surge protection and lightning protection
Off-Grid Travel Power: Quick-remove free-standing rear platform with integral Atlas Copco CEA 650kVA genset and easy-plug P3 Connector system; permanent fit option
Slurry pump: Keto 16/14 (Hart / Warman option), with WEG 1,000 kW 3.3 kV VSD direct drive water cooled motor
High pressure spray pump: Keto 10/8 (Hart / Warman option), with WEG 110kW SS belt drive
Unladen mass:Â 380t (excl optional 10t FEL hopper)
Avg Ground pressure: <145kPa unladen; <150kPa feed off; <185 kPa normal operation; <105 kPa max laden, sunk to chassis (easily climbs out with double grouser pads)
Noise Level:Â 60-65 dBA at 10m (less than 45 dBA at 100m) ; no equipment above 85 dBA at 1m in normal operation;
Feeder drive:Â Â High torque direct drive (no gearbox) Hagglunds radial piston hydraulic motor; 0.5m/s at max throughput
Feeder bed:Â 1,700mm wide (Transmin 2m belt-on-slats D4 conveyor) x 600 mm deep (remotely adjustable up to 250 mm lower to suit weather / local ore characteristics)
Sump live volume:Â Â 20 m3; at 15 m3 working volume and 2,000 t/hr providing 23 – 34 seconds residence time for operational range of 45% to 55% w/w concentration slurries
Optional Grizzly Excavator Boom:Â Bucket for lump clay removal / push-through or rock pick to work against the 40mm grizzly bars; quick-remove system
Optional FEL / Excavator Hopper:Â 50 m3 / 80t capacity;Â 10t mass, 25 mm thick UHMWPE bolted panel lining; chain slings; quick-remove system
Optional slewing radial discharge conveyor:Â Â 150t/hr; 15m radius (tbc, should trash stream require more than occasional dozer clearance)
3,500 t/hr (29mtpa) Configuration: Comprising a 900 mm feed depth to a 3.6m wide screen, 30m3 sump, 20/18 slurry pump, 1.4MW motor, DN600 hoses and longer steerable tracks
Stockpile Reclaim / Overburden Dozer Trap
(jump to Introductory Info,   Pushed Skid DMU,   Tracked DMU, or Dozer Pump Unit)OVERVIEW              (click here for .pdf copy of this info and GA drawings)
Modular skid mounted dozer trap module constructed to modern OHS, operational and maintenance standards, for loading yard or overburden conveyors from 2.5m RL. Very robust construction, grizzly protected, with easy access for cleaning, and simplified maintenance requirements. Manually adjustable bed depth to handle ore variation (remote operation option available), automated hydraulic belt tensioning / take-up system, modular bolted UHMWPE chute panels for long life and low wall friction, optionally with ceramic linings to suit highly abrasive ores. Wingwall option for fixed configuration.
Comes complete with crowned pulleys, s/s primary, secondary and return scrapers, and belt splicing access, making these units very easy to live with. Using fabric belts to suit ores such as bauxite, salt, gypsum and sand; well suited to use with iron ore and most heavy / lumpy / rock ores, using a suitable steel cord belt.
Constructed in structural modules for easy repair, protected by extreme environment glass plate epoxy (Interzone 954GF), duplex 2205 s/s structure option, with stainless steel or non-corrosive materials used for all belt contacting components. Configured with a robust headwall for dozer pushing forces, and an integral rilling-style side wing-wall, these units can easily be transported to site as ‘flat-packs’, containerised, or sent fully complete, tested and ready for operation. Quick-remove FEL hopper option and clip-on / permanent belt splicing side platforms option available.
Available configured to be fixed to foundations, or fully portable via dozer push points / tow points and rounded infills to minimise pushing / towing forces.
These reclaimers make for a very efficient stockpile configuration for rapid ship-loading and flexible storage / overburden removal systems.
KEYÂ PERFORMANCE SPECIFICATIONS
Reclaimer Capacity Configurations:
Unladen mass:Â 53t (mobile) / 48t (fixed) (for 1,500mm belt configuration)
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