Weir Minerals Africa : Pumping innovation underpins GEHO success

The technical advancement of Weir Minerals’ GEHO® positive displacement pumps has ensured they play a key position in reducing mines’ environmental footprint.
The GEHO® pump range is well-known in various pumping functions including tailings, backfill, ore transportation and dewatering. Weir Minerals Global Product Manager for GEHO® constructive displacement (PD) pumps, Erik Vlot, highlights the pumps’ ability to pump extremely viscous slurry, allowing mines to preserve water. The energy efficiency of pipeline transportation also helps minimize vitality costs and reduces mines’ carbon footprint.
“The basis 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 materials at excessive temperatures, corresponding to nickel slurry at more than 200°C at a mine in Madagascar.”
With their high capacity, GEHO® pumps transport bauxite or iron ore over hundreds of kilometres, providing one of the price efficient and sustainable switch methods obtainable to the mining industry. These pumps have additionally performed an integral position in the success of a Weir Minerals paste answer at Finland’s largest open pit mine. Yara’s Siilinjärvi mine makes use of GEHO® pumps to maneuver tailings from the plant, achieving the mandatory beach slope on its tailings facility to meet its life-of-mine strategy.
Backfilling is a crucial method for mining to realize security and environmental objectives, and GEHO® pumps have been enabling this work. In a North American platinum operation, the gear pumps over a thousand litres a minute of this viscous backfill material – measuring 70% solids by weight – again into the mine’s labored out areas.
In the context of deep mines, GEHO® pumps provide an environment friendly and reliable means of dewatering from nice depths, instead of using a number of smaller pumps to switch water to floor. The highly effective GEHO® pump vary can do that by pumping from the underside of a mine to the surface in just one raise – even over kilometres.
“Apart from Frugal of this resolution, an essential advantage is that it reduces the risk of 1 pump in a pumping chain failing, and disrupting the entire dewatering perform,” he says. “It also reduces the price and maintenance necessities of having multiple pumping stations at totally different levels throughout the mine.”
The status of GEHO® pumps has additionally been constructed on their reliability, he explains. This has resulted from Weir Minerals’ ongoing research and improvement into its pumps’ put on components. This course of is based on an in-depth understanding of the entire pumping system in which the pump operates.
“Taking into consideration how our pumps work together with these methods, we concentrate on key aspects of the pumps such because the diaphragm and propelling liquid system,” he says. The propelling liquid offers the barrier between the piston and the diaphragm making certain that all the shifting parts move in oil and never slurry.
He emphasises the importance of diaphragm dynamics and the necessity to management the quantity of propelling liquid in the chamber. This is finished by way of the PLC management, to ensure that the diaphragm runs in the proper position.
“Rubber is nice at bending, but when it stretches it could tear,” he says. “Our goal is to extend the substitute intervals between diaphragm replacements, serving to mines to reduce each their downtime and their whole cost of ownership.”
The monitoring of GEHO® pumps’ operation is conducted through digital technology in order that operators can stay abreast – in real time – of the pump’s efficiency and situation. Weir Minerals’ digital layer for these pumps is being rolled out to prospects, 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 possibilities for transferring coarse ore to the surface from deep in a mine – as a less expensive option to traditional hoisting strategies.
“Vital to all our GEHO pump options is the Weir Minerals’ world service community, guaranteeing that wherever our pumps are operating there will be an skilled native service crew to help them,” he concludes.
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