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Weir Minerals Africa : Pumping innovation underpins GEHO success

The technical development of Weir Minerals’ GEHO® positive displacement pumps has ensured they play a key position in lowering mines’ environmental footprint.
The GEHO® pump range is well-known in varied pumping purposes including tailings, backfill, ore transportation and dewatering. Weir Minerals Global Product Manager for GEHO® optimistic displacement (PD) pumps, Erik Vlot, highlights the pumps’ capability to pump highly viscous slurry, permitting mines to preserve water. The vitality effectivity of pipeline transportation additionally helps minimize power costs and reduces mines’ carbon footprint.
“The foundation of GEHO pumps’ success is our ongoing attention to technical innovation and enchancment,” says Vlot. “This also allowed us to be pioneers in the pumping of very acidic material at excessive temperatures, corresponding to nickel slurry at greater than 200°C at a mine in Madagascar.”

With their high capability, GEHO® pumps transport bauxite or iron ore over hundreds of kilometres, providing one of the price efficient and sustainable switch methods available to the mining trade. These pumps have also played an integral position in the success of a Weir Minerals paste resolution at Finland’s largest open pit mine. Yara’s Siilinjärvi mine makes use of GEHO® pumps to maneuver tailings from the plant, reaching the necessary seashore slope on its tailings facility to fulfill its life-of-mine technique.
Backfilling is a vital method for mining to attain security and environmental objectives, and GEHO® pumps have been enabling this work. In a North American platinum operation, the equipment pumps over a thousand litres a minute of this viscous backfill material – measuring 70% solids by weight – back into the mine’s worked out areas.
In the context of deep mines, GEHO® pumps provide an environment friendly and reliable way of dewatering from great depths, as a substitute of using a number of smaller pumps to switch water to floor. The highly effective GEHO® pump range can do this by pumping from the bottom of a mine to the floor in only one carry – even over kilometres.
“Apart from the cost effectiveness of this answer, an essential advantage is that it reduces the risk of one pump in a pumping chain failing, and disrupting the complete dewatering operate,” he says. “It also reduces the cost and maintenance requirements of getting multiple pumping stations at completely different levels within the mine.”

The status of GEHO® pumps has also been built on their reliability, he explains. This has resulted from Weir Minerals’ ongoing analysis and development into its pumps’ wear components. This course of relies on an in-depth understanding of the entire pumping system during which the pump operates.
“Taking into account how our pumps interact with these techniques, we give attention to key aspects of the pumps such as the diaphragm and propelling liquid system,” he says. The propelling liquid offers the barrier between the piston and the diaphragm guaranteeing that all the moving parts move in oil and not slurry.
He emphasises the significance of diaphragm dynamics and the necessity to management the quantity of propelling liquid within the chamber. This is completed via the PLC management, to guarantee that the diaphragm runs in the proper position.
“Rubber is sweet at bending, but when it stretches it can tear,” he says. “Our goal is to extend the alternative intervals between diaphragm replacements, helping mines to reduce each their downtime and their whole price of ownership.”

The monitoring of GEHO® pumps’ operation is conducted through digital technology so that operators can stay abreast – in actual time – of the pump’s performance and situation. pressure gauge for these pumps is being rolled out to clients, informing the maintenance schedules and enhancing pump availability.
Vlot notes that Weir Minerals continues to innovate with the GEHO® pump range, and is even exploring prospects for transferring coarse ore to the floor from deep in a mine – as a less expensive option to conventional hoisting strategies.
“Vital to all our GEHO pump solutions is the Weir Minerals’ world service network, guaranteeing that wherever our pumps are working there will be an experienced local service crew to assist them,” he concludes.