Introductory Info follows, or jump to Pushed Skid DMU,    Tracked DMU,    Stockpile Reclaim Dozer Trap,  or  Dozer Pump Unit

Dozer Mining Unit Technology

Using well-proven mining technology, these high throughput fully self-driven tracked, or dozer pushed, dozer traps will dry mine lower head-grade mineral sands resources with a lower $/t, lower power consumption / greenhouse gas emissions, and higher reliability and availability than any current DMU. Driving more $M to annual profits AND increasing total yield from an ore body by several $10M’s over the life of mine.

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 close 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. 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.

Constructed in structural modules for easy repair, protected by extreme environment glass plate epoxy (Interzone 954GF), shop tested major subassemblies can be transported around the globe for rapid assembly and commissioning, or fully containerised and ‘stick-built’ for difficult access sites. Local fabrication and assembly of some modules is available for suitable sites. 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 very 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 400 alloy steel plates, with all cavities sealed / filled with expanding polyurethane. And including extremely robust resin cored dry transformers, as preferred for draglines and other large mobile equipment.

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 and water lines, 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:  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 (1,100 / 950 t/hr = 7mtpa 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, 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, 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: Warman 16/14 AH, with WEG 1,000 kW 3.3 kV VSD direct drive water cooled motor

Unladen mass:  Screen Skid: 124t  ;   Feeder Skid: 177t (add 5t for optional grizzly boom and 10t for optional hopper)

Unladen avg ground pressure:  <28 kPa (feeder)  ;  <32 kPa (screen) (increases slightly with optional equip)

Noise Level:  60-65 dBA at 10m (less than 45 dBA at 100m) ; no equipment above 85 dBA at 1m in normal operation;

Feeder drive:  SEW bevel helical gearmotor with dedicated oil cooler and 185kW VSD drive; 0.5m/s at max throughput

Feeder bed:  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:  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:  For lump clay removal / push-through; quick-remove system

Optional FEL / Excavator Hopper:  50 m3 / 80t capacity;  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)

OVERVIEW              (click here for .pdf copy of this info;  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.

 

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. Note that this machine has been structurally fully detail designed, ready to build, and the access system details, developed for the DMU, will be incorporated here too.

KEY PERFORMANCE SPECIFICATIONS

Capacity: 2,000 t/hr max / 1,700 t/hr design nominal @1.6 bulk density, 2.6 SG  ;       Ambient de-rating:  >45o C

Annual Throughput:  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 44 cm x 117 cm, screen at -3.2 mm; -2 mm option)

Laden Travel Speed (high / low):  1 km/hr (on flat) / 0.5 km/hr (on 20 deg incline / tight turning)  ;    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 2.5MVA dual output KNAN transformer, 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 CEA 650kVA genset and easy-plug P3 Connector system; permanent fit option

Slurry pump: Warman 16/14 AH, with WEG 1,000 kW 3.3 kV VSD direct drive water cooled motor

Unladen mass:  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:  60-65 dBA at 10m (less than 45 dBA at 100m) ; no equipment above 85 dBA at 1m in normal operation;

Feeder drive:  High torque direct drive (no gearbox) Hagglunds radial piston hydraulic motor; 0.5m/s at max throughput

Feeder bed:  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:  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:  For lump clay removal / push-through; quick-remove system

Optional FEL / Excavator Hopper:  50 m3 / 80t capacity;  10t mass, 25 mm thick UHMWPE bolted panel lining; chain slings; quick-remove system

Optional slewing radial discharge conveyor:   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 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 conveyors from 2.5m RL. Very robust construction, grizzly protected, with easy access for cleaning, and simplified maintenance requirements. Adjustable bed depth to handle ore variation, 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, complete with crowned pulleys, s/s primary, secondary and return scrapers, and belt splicing station, make these units very easy to live with. Using fabric belts to suit ores such as bauxite, salt and sand; well suited to use with iron ore and most heavy / lumpy / rock ores, using a steel cord belt on the conservatively sized pulleys.

Constructed in structural modules for easy repair, protected by extreme environment glass plate epoxy (Interzone 954GF), and stainless steel / 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 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. When used in combination with tracked portable radial stackers, they make for a very efficient stockpile configuration for rapid ship-loading and flexible storage systems.

KEY PERFORMANCE SPECIFICATIONS

Reclaimer Capacity Configurations:

Reclaimer Configurations

Unladen mass:  53t (mobile) / 48t (fixed) (for 1,500mm belt configuration)

Ground pressure:  <35 kPa (unladen)  ;  <50 kPa (laden)

Belt Feeder: 11 degree inclined, ceramic lagged crowned pulleys (face = belt width +300mm), at 14m centres, via 117cm x 34cm aperture grizzly (2.5m high entry point, 4.8m long feed zone)

Ambient de-rating:  >45o/C

 

Dozer Pump Unit (DPU)

(jump to Introductory Info,    Pushed Skid DMU,    Tracked DMU,  or  Stockpile Reclaim Dozer Trap)

OVERVIEW

A Fluidised Conveying Dozer Trap with 20 deg inclined 1.2m wide belt feeder, sump and pump only (no screen) mounted on a single dozer pushed skid. This is the most economical way to convert a truck-shovel operation to a pumped conveying system IF the feed is relatively clean and slurry pipework can be run relatively flat. As may occur in a silica sand mining operation.

Looking a lot like the stockpile discharge feeder above, except inclined at 20 degrees, slightly narrower, and ~2m longer. Discharging over an adjustable vibrating bar divergator grizzly above a sump and pump, both located in the triangular opening below, with trash thrown forward for intermittent clearing by dozer. Same side supply / return lines, complete with water calming sump entry, automated level control, and solenoid activated direct injection startup jets for recovery after a crash stop, or for emergency density reduction.

Adjustable bed depth to handle ore variation, automated hydraulic belt tensioning / take-up system, modular bolted ceramic lined chute panels, complete with crowned, ceramic lagged and conservatively sized pulleys, s/s primary, secondary and return scrapers, and belt splicing station, plus Victaulic pipework fittings, and auto-lubed bearings used throughout to simplify maintenance, making these units very easy to live with.

Constructed in structural modules for easy repair, protected by extreme environment glass plate epoxy (Interzone 954GF), and stainless steel / 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. Local fabrication and assembly of some modules is available for suitable sites.

KEY PERFORMANCE SPECIFICATIONS

Capacity (max/nominal):  1,100 / 950 t/hr  @1.6 bulk density, 2.6 SG

Trash handling: Lumps to -300mm; (Grizzly apertures 45cm x 117cm (2.5m high entry point, 4.8m long feed zone), divergator -50mm or less, to suit resource)

Power supply: 415V plugged cable (MV / HV incoming available)

Slurry pump: 14/12, with 450kW soft start motor

Unladen mass:  93t

Ground pressure:  <15kPa (unladen)  ;  <20kPa (laden)

Feeder drive:  75kW VSD; 0.36 m/s at max throughput (optional density control)

Belt Feeder: 1,200 mm wide PN1250 4ply belt, 20 degree inclined, 830 mm ceramic lagged head pulley, 530 mm ceramic lagged tail pulley, 1.5m face width, @16m centres

Power @ 0.9PF:  600 kVA @ 415kV supply

Sump live volume: 6 m3; at 5 m3 working volume and 1,100 t/hr providing 14 – 21 seconds residence time for operational range of 45% to 55% w/w concentration slurries

Ambient de-rating:  >45o/C