CONVEYING
commodities from the mines to the ore storages, from where they are transported to the open access station. Here, the concentrates are received by a feeding 43 m belt conveyor that transfers it to the pipe conveyor at a height of 6 m. A dedusting unit ensures that no material is emitted during this process.“ We equipped the feeding belt conveyor with a metal detector and an electric magnet,” explains Wolf.“ This prevents damage of the downstream pipe conveyor by metal parts.” At the end of the route, the conveying system runs along the seaside in the naval port of Callao to the transfer tower. Here, the belt opens automatically. It transfers the material to another belt conveyor that conveys the ore to the ship loading system.
Sam states:“ This modern system, in operation now for 17 months, caused a significant increase in speed by 500 % for loading concentrates and reduced the ship’ s waiting time until loading by more than 80 %. These advantages lead to savings for the exporters and improve the competitiveness of the country ' s mining industry.” Transportadora Callao is now able to handle ships for bulk products of up to 60,000 DWT without obstructing the work in the other terminals of the Callao port.
“ BEUMER ' s technical team has proven its professionalism and stand-by duty, during construction and operation, and after 1.5 years in operation and more than 4 Mt of transported concentrates, we can attest that the set goals have been reached,” explains Victor Sam.
BEUMER Group says that its extensive customer support ensures a high level of system availability after commissioning. Transportadora Callao just signed a teleservice contract with BEUMER Group, so that BEUMER specialists can eliminate possible malfunctions in the system. If necessary, the BEUMER Group service staff will go to Callao in order to make the necessary adjustments and prevent malfunctions and machine breakdowns, which would lead to long downtimes.
TNT stacker reclaimer contract for Neryungri
Terra Nova Technologies, Inc( TNT) recently secured a contract for the design and supply of‘ Phase 1’ of the conveying and on-off heap leach stacking and reclaiming system at Nordgold ' s Gross gold mine. The new mine will be adjacent to Nordgold ' s Neryungri mine in southwestern Yakutia, Russia. The Phase 1 package includes four overland conveyors, an emergency bypass stockpile and reclaim system, a mobile tripper, reclaim hoppers and a mobile heap leach stacking system. The Phase 2 package, which is expected to commence in 2017, will add an additional overland conveyor, mobile heap leach reclaim system and mobile tailings stacking system.
When both phases are complete, the network of five 1,200 mm overland conveyors will feed the three mobile systems, which will comprise a total of 42 1,200 mm mobile conveyors. These include thirty-two 38 m‘ grasshopper’ style portable conveyors, two 20 m short portables, two 29 m horizontal feed conveyors, two 43 m horizontal conveyors, two 55 m radial stackers and two mobile crossover conveyors. This is the the second system supplied by TNT for Nordgold. At the Bouly gold mine in Burkina Faso, the stacking system, overland conveying, and agglomeration drum supplied by TNT began operation in May 2016. Two longtime clients also added new ramp portable conveyors to their TNT systems in 2016: four RPs at Glencore’ s Lomas Bayas copper mine in Chile and three RPs at Areva ' s Somair uranium mine in Niger.
Terra Nova Technologies, Inc( TNT) recently secured a contract for the design and supply of ' Phase 1 ' of the conveying and on-off heap leach stacking and reclaiming system at Nordgold ' s Gross gold mine
including the control system. Tight integration between the mine team and Bosch Rexroth engineers in Brazil allowed the switch to be made in just three days.
“ The simplicity of changing to a hydraulic direct drive was clearly indicated in the mine’ s feasibility study. The modular Hägglunds solution could be installed in limited space and without alignment problems, thanks to flexible placement of the drive unit and the mounting of the motor directly on the pulley drive shaft. For the mining company, however, conveyor safety was the strongest
argument. Not only are the hydraulic motors
Hägglunds drives equip Brazil iron ore insensitive to dust and grit, the drive system also
A Brazilian mine producing some 40 Mt / y of iron protects the conveyor from high stresses, for ore has for the first time equipped one of its belt example during starting. Together with the conveyors with a Hägglunds hydraulic direct drive elimination of sensitive and open rotating system from Bosch Rexroth. This installation has couplings, this creates a system that is safer for led to clear and substantial improvements in the the operator and more reliable for the mine.” conveyor’ s safety and reliability says the
As shown by the mine’ s records, the exchange company.“ With their direct-mounted motors, of drive system has done away with a good deal infinitely variable speed and resistance to shock of maintenance. Because the drive unit provides loads, hydraulic direct drive systems combine a variable hydraulic flow to the Hägglunds motors, peace of mind with high productivity. This is why in response to a control signal, the mine can now one Brazilian multinational producer of iron ore fully control the conveyor speed and adapt it to chose to install a Hägglunds direct drive from Bosch Rexroth on one of its conveyors.” The Hägglunds system replaced an electromechanical drive running at constant speed in combination with a fluid coupling. The new solution comprises two Hägglunds hydraulic motors of type Hägglunds CB, as well as a Hägglunds The Hägglunds solution offered productivity, variable speed, efficiency but also hydraulic drive unit simplicity and compact installation
52 International Mining | FEBRUARY 2017