Voith have developed a fluid coupling technology, specifically designed for drives on open-pit mining belt conveyors named TurboBelt 780 TPXL. The development of an XL blade wheel profile is said to deliver twice the power compared to previous couplings of similar size. It has been designed for 6- and 8- pole induction motors operating at speeds of 900 to 1,200 rpm. On start-up, there is a precisely controlled introduction torque to protect the belt and the driveline. Start-up times of up to several minutes can be individually set in the control system.In May 2012, the initial start-up of this new fluid coupling was in one of the biggest sea terminals in northern Brazil, where iron ore is shipped worldwide. In order to handle the increasing amount of iron ore, the operating mining company decided to install three TurboBelt 780 TPXL couplings in the drives of a 1,451 m long conveyor. As the conveyor transports around 10,000 tons of iron ore every hour, its reliability has high priority for the mining company. The maintenance efforts can be reduced to a minimum as the hydrodynamic power transmission is completely wear-free. Compared with traditional couplings, the TurboBelt 780 TPXL requires reduced installation space and is also lighter. This has enabled a simple and quick installation and alignment in the Brazilian sea terminal in May 2012.
Contractor MACA is to carry out drilling, blasting, loading and hauling at Regis Resources’ Duketon South operations near Laverton in Western Australia for, at least, another five years.The two companies have extended the open-pit mining services contract as Regis has opened up multiple pits and sites for mining. This will now see MACA mine the Rosemont, Garden Well, Erlistoun, Baneygo, Toohey’s Well and other potential satellites in that region at Regis’ discretion.“The contract is the result of a collaborative approach with Regis, utilising technology to optimise the mine planning across the operations and ensuring the most efficient use of both machinery and human resources,” MACA said.The five-year tenure for MACA starts from July with the option for a further five-year extension. It is expected to generate approximately A$590 million in revenue for MACA over the initial term adding A$231 million work in hand (WIH) beyond what was previously contracted at the Rosemont and Garden Well pits.The Duketon South operations produced a record 361,373 ounces of gold in the 12 months to the end of June.MACA Executive Director Geoff Baker said the new contract would ensure the company is able to invest in more efficient equipment to continue to deliver “quality mining services at the lowest cost to Regis”.MACA’s WIH for its 2019 financial year to the end of June 2019 now stands at A$490 million with A$347 million of this within the mining segment.