Various buckets are available for all EJC scoops, including front dump buckets for ore pass dumping and ejector buckets for truck and conveyor belt loading. The ejector buckets improve truck fill factors and prevent shock loading, the company says.
The power train of all EJC scoops is designed and tested for ease of loading and tramming, EJC says. Maximum use of available power is achieved by matching various components of the machine with the aid of a computer. Either a Deutz or a Caterpillar diesel engine is available on all models. A third option is an electric motor. The size of these engines depends on the model. If an electric motor is chosen, a torque converter transfers power to a modulated powershift transmission. Also, a hydraulically-controlled cable reel automatically matches travel speed in either direction to keep the power cable taut. John Clark Inc (JCI)
Jci’s 250-M and 300-M LHDs feature sealed pins and bushings on all hinge points; monostick bucket and steering controls to reduce operator fatigue; Caterpillar 3304 diesel engine with turbo charge option (Deutz engine is also available); improved rear profile to reduce damage to the machine’s frame; planetrary drive axles with enclosed wet disc brakes on all four wheels; optional L-F tires for long life and good traction; ram bucket with full pointed lip for fast, sure digging; heavy duty Mesabi radiator; lift-type engine hoods for easy access; modulated power shift transmission; simplified electrics; an optional ejector bucket; high ground clearance; full flow hydraulic filter and reinforced hydraulic and fuel tanks.
JCI’s 50-M, which it calls the world’s smallest 4-wheel drive, diesel scoop, has a 0.4-cu-m bucket capacity and a tramming load of 680 kg. The LHD is 810 mm wide and features a Deutz model F2L-511W engine. Also available is a 3-post roll cage that offers visibility and protection. Man GHH
Man GHH has been manufacturing LHDs with up to 15-tonne payloads since 1964. The company built its first flame-proof diesel engine system in 1970 and has been manufacturing electric LHDs for 12 years. Many models feature as standard equipment dual-circuit safety brake systems, Clark full power shift transmissions, excellent tramming speeds, 2-layer configuration (200-m- long) cables on electric models. Teledyne
L’equipement Minier, of Paris, France, has been marketing its 0.4- cu-m Microscoop for eight years. With more than 1.4 million hours of operating experience with its original electric model, the company has introduced a new electric model, called the CTX 1 HE and a new diesel model, the CTX 1 D. The 22-kW electric motor in the CTX 1 HE can deliver a breakout force of about 3.2 tonnes and ventilation requirements are lower than a diesel unit’s needs. The electric cable, which is 85 m long, is kept taut by an automatic tensioning device. Production rates, ranging from 17 to 20 tons per hour, can be expected over a tramming distance (one way) of 50 m, the manufacturer says. Toro Finnish manufacturer ARA makes the Toro line of LHDs. Toros feature the Z-linkage bucket system and the EL TORO horizontal cable system (on electric machines) for flexibility and increased loading capacity. Toro says its cable system allows operators “forget-the-cable” flexibility.
The main advantages of Toros, says the manufacturer, are capability for more loaded tons and extra long intervals between major maintenance requirements. Other Toro features include remote control, flame proofing, safety cabins, automatic central lubrication, and extra long bucket reach. The Torotel remote control system uses a pulsed digital coded control signal of either 27 or 40 Mhz, which avoids propogation problems of ultra high frequencies, the company said. Wagner
Wagner says it manufactures the most extensive line of electric and diesel-powered underground vehicles in the world. There are 18 models of its LHDs alone.The most recent innovation has been the SAHR braking system, a spring applied, hydraulically released mechanism. The SAHR brake allows all split systems, dual valves, multiple tanks, isolation valves and double check valves to be eliminated.
Besides the SAHR system, its powerhouse LHD, the ST-8B and others in the Wagner line, include a new boom-to-bucket linkage system that provides aggressive muckpile performance, easy maintenance access and a level, stable attitude for the bucket, according to the company. The operator works with a fast, single-lever dump and hoist controls and monostick steering. The ST-8B features an 8.5-cu-yd bucket with a 30,000-lb tramming capacity and a breakout force of 68,000 lb.
Besides its trademark Scooptram diesel LHDs, Wagner also manufactures mechanical drive Electrams. Single-stage torque converters, tough planetary drive axles and rugged mechanical drivelines transmit power to the wheels.
Wagner’s latest innovation was The SCOOPY, a 0.4-cu-m-bucket LHD for narrow-vein mining. It measures 850 mm wide, 4.04 m long and 1.21 m high. It features a fully reversible hydrostatic transmission spiral bevel differential. Submersible Pump
A new sump pump, designed to handle the most difficult slurries, is being marketed by Warman International of Madison, Wis.
The unit is available in either hard metal or elastomer wet end designs. Other features include long-wearing, interchangable parts, and temperature- and moisture-sensors. An agitator is optional.
Highland Valley Haulers
As part of a recent rationalization program, Highland Valley Copper has purchased eight new 190-ton CAT 789 haulage trucks and plans to add 16 more to its new fleet. Total cost should be about $10 million. The cat units have a mechanical transmission, a hydraulic retarding system, electronic diagnostics and a relatively fast operating speed. The new trucks will be replacing 20 Unit Rig M100s and nine Wabco 120Bs.
Vibrating Screens
A multi-feed, wet sizing screen, consisting of three independent screening units mounted in a single frame and driven by one high-speed vibrating motor, is now available from Dagex Inc. of Willowdale, Ont.
The company also markets high- speed, dry screening machines.
The Natural Frequency Advantage
A triple-deck, inclined, natural frequency screen has been introduced by Telsmith Inc., an Astec company based in Milwaukee, Wis.
The unit uses about one-eighth the power required by conventional screens. A small 3.7-hp motor excites one screen; and through springs, the vibrating frequency is transmitted to the second and third screens.
Maintenance is also reduced as a direct result of the elimination of a number of bearings, shafts, seals, housings and sheaves.
The unit measures 6×16 ft.
Vibration Monitor
A new laser transformer, being marketed by Bruel & Kjaer Can
ada of Pointe Claire, Que., allows maintenance workers to read machine vibration levels without contact between the diagnostic equipment and the apparatus being tested.
Frequency ranges up to 20 kHz.
A Big Grizzly
A grizzly feeder, 1.68 m wide and 9.14 m long, has been introduced by Telsmith Inc. of Milwaukee, Wis.
The new feeder is designed to match the larger jaw crushers, impactors, gyratories and quarry trucks, the company says.
The 2.7-m-long grizzly section provides sufficient area to handle the toughest scalping problems, according to a company release.
Capacity ranges from 1,000 tons per hr to 2,450 tons per hr and the vibrator unit operates at 750 to 850 r.p.m.
The unit has been designed for a down slope angle of 5 degrees . The dumping area is reinforced with structural steel beams, heavy pan and thick abrasive- resistant steel liner.
Conveyor Component
Increased conveyor life is one of the benefits claimed by the manufacturer of a new modular conveyor component. The unit is being marketed by Dravo Wellman Co. of Pittsburgh, Pa.
Called the Solidur Slider Bed, the unit provides a rigid, smooth support surface to a conveyor belt, replacing idlers at loading and high-impact areas along conveyors.
A series of non-stick ultra-high molecular weight polyethylene strips support the conveyor belting at the high-impact area.
The beds are available in belt widths up to 7 ft and in standard bed lengths of 4, 5 and 10 ft. Suppliers’ Notes Echo Bay Mines has transferred the headquarters for all its Canadian exploration operations from Edmonton to a new office in Vancouver, B.C. The new address is 354 Granville Square, 200 Granville St. V6C 1S4. The reason for the move is so the company may take better advantage of submittals and joint-venture opportunities, says Neil Muncaster, vice-president of exploration. Golder Associates, a consulting company which provides geotechnical engineering services, has opened an office in Val d’Or, Que. Other offices are in Vancouver, Calgary, Saskatoon, Toronto and St. John’s, as well as in the U.S., the United Kingdom and Australia. The company says the new office should allow it to better serve the mining industry of Abitibi- Temiscamingue and the rest of Quebec. Woodhead Canada has recently received csa certification on its full line of low-voltage lighting. Woodhead Canada is a subsidiary of Woodhead Industries of Northbrook, Ill., Canada’s resource for Aero-Motive, Armiger, Brad Harrison and Daniel Woodhead products. Webasto Heater (division of Schmitter Car Heating) has a new headquarters, at 4450 Mainway, Burlington, Ont. The new building encompasses more than 10,000 sq ft.
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