New plant at NZ’s largest lime quarry


New plant at NZ’s largest lime quarry New plant at NZ’s largest lime quarry

A new scalping screen has been installed at Graymont’s Oparure Quarry

The Oparure Quarry is New Zealand’s largest single lime quarry and sits on a 67-hectare site, which is located on top of the rich Waitomo strata.

The main driver behind having the screen installed was to help the Oparure operation recover usable product from what was previously waste primary scalp product.

A refurbished Svedala VFS screen was supplied, with special design considerations required due to the sticky nature of the limestone feedstock and the confined installation space. A screen bypass option was designed into the screen structure to enable rejection of high clay content feedstock.

The screen was fitted with Trellex rubber media to help it handle the sticky feedstock. Special non-stick liners were installed in key transfer points and Metso Trellex belt scrapers were used to provide superior cleaning of all conveyor belts.

MIMICO, the New Zealand distributor of Metso and Trellex equipment, provided the product expertise and refurbished screen, while the MIMICO Engineering division (previously QMI Engineering) designed and fabricated the screen structure, conveyors, and all chute work.

The Oparure plant also manufactures a range of high-quality Pulverised Limestone products such as ag-lime, CalcimateTM, and industrial fine lime in bags, bulk bags and bulk, as well as aggregates in bulk, predominantly supplying customers across the North Island.

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