Modern Quarrying Q2 2020

AUTHOR: MUNESU SHOKO KEY PLANT UPGRADES PAY DIVIDENDS AT OMV STILFONTEIN

AT THE QUARRY FACE

A raft of in-house plant improvements over the past 18 months – anchored by the automation of the secondary crushing circuit, installation of a new pan vibrating feeder and a new fines separator, among other upgrades – have increased production capacity by 30 – 40% at OMV Stilfontein.

Since the acquisition by the Raubex Group, OMV has over the years continued to optimise its operations, looking to maintain and increase value by implementing innovative measures to increase productivity and efficiency.

H aving acquired a controlling interest (70%) in OMV (previously Oranje Mynbou en Vervoer) in 2014, JSE-listed Raubex Group, one of the largest construction and material supply companies in South Africa, has over the years continued to fund internal growth. The investments have helped turn the company from a small family concern into a formidable construction materials supplier. Since the acquisition by the Raubex Group, OMV has over the years continued to optimise its operations, looking to maintain and increase value by imple- menting innovative measures to increase productivity and effi- ciency. During a recent visit to OMV Stilfontein, Modern Quarrying was afforded an exclusive plant tour to witness several plant

KEY TAKEAWAYS

With manual feeding being an impediment to the secondary crushing process, OMV Stilfontein installed a programmable logic controller and human machine interface on the circuit to automatically regulate the feed box

To improve sand production capacity, which is a big selling item, OMV Stilfontein has installed a new, large fines separator. This has helped up sand production capacity from 25 t to up to 33 t per hour

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MODERN QUARRYING QUARTER 2 - 2020