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Weir Minerals Africa : Pumping innovation underpins GEHO success

The technical advancement of Weir Minerals’ GEHO® optimistic displacement pumps has ensured they play a key position in decreasing mines’ environmental footprint.
The GEHO® pump vary is well known in varied pumping applications together with tailings, backfill, ore transportation and dewatering. Weir Minerals Global Product Manager for GEHO® positive displacement (PD) pumps, Erik Vlot, highlights the pumps’ ability to pump extremely viscous slurry, allowing mines to preserve water. The power efficiency of pipeline transportation additionally helps minimize power costs and reduces mines’ carbon footprint.
“The foundation of GEHO pumps’ success is our ongoing consideration to technical innovation and improvement,” says Vlot. “This also allowed us to be pioneers within 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 capacity, GEHO® pumps transport bauxite or iron ore over lots of of kilometres, providing one of the most price effective and sustainable switch strategies obtainable to the mining industry. These pumps have additionally performed an integral role within the success of a Weir Minerals paste solution at Finland’s largest open pit mine. Yara’s Siilinjärvi mine uses GEHO® pumps to move tailings from the plant, achieving the mandatory seaside slope on its tailings facility to fulfill its life-of-mine strategy.
Backfilling is a vital methodology for mining to realize safety and environmental targets, and GEHO® pumps have been enabling this work. In a North American platinum operation, the tools pumps over a thousand litres a minute of this viscous backfill material – measuring 70% solids by weight – back into the mine’s labored 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 utilizing a quantity of smaller pumps to switch water to surface. The highly effective GEHO® pump range can do that by pumping from the underside of a mine to the floor in only one raise – even over kilometres.
“Apart from the cost effectiveness of this resolution, an necessary advantage is that it reduces the chance of 1 pump in a pumping chain failing, and disrupting the entire dewatering operate,” he says. “It additionally reduces the price and upkeep requirements of having a number of pumping stations at completely different levels throughout the mine.”

The popularity of GEHO® pumps has also been constructed on their reliability, he explains. This has resulted from Weir Minerals’ ongoing research and growth into its pumps’ wear parts. This process is predicated on an in-depth understanding of the whole pumping system during which the pump operates.
“Taking into account how our pumps interact with these techniques, we concentrate on key elements of the pumps such because the diaphragm and propelling liquid system,” he says. The propelling liquid supplies the barrier between the piston and the diaphragm guaranteeing that each one the transferring components move in oil and not slurry.
He emphasises the importance of diaphragm dynamics and the necessity to management the volume of propelling liquid in the chamber. This is finished through the PLC control, to ensure that the diaphragm runs in the proper place.
“Rubber is good at bending, but if it stretches it can tear,” he says. “ pressure gauge 10 bar is to extend the replacement intervals between diaphragm replacements, serving to mines to reduce each their downtime and their whole price of ownership.”

The monitoring of GEHO® pumps’ operation is carried out by way of digital expertise in order that operators can keep abreast – in real time – of the pump’s performance and condition. Weir Minerals’ digital layer 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 vary, and is even exploring prospects for transferring coarse ore to the floor from deep in a mine – as a more cost effective option to traditional hoisting strategies.
“Vital to all our GEHO pump options is the Weir Minerals’ international service network, making certain that wherever our pumps are working there will be an skilled local service crew to help them,” he concludes.
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