Modern Quarrying January-February 2015

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AROUND THE INDUSTRY
PLANT and
EQUIPMENT SOL TIONS
Nordberg GP7 – efficiency at its best
Metso continues to expand its range of
high-capacity crushers by launching the
Nordberg GP7, its largest Nordberg GP sec-
ondary crusher to date.
The new 58 t crusher features the most
ideal combination of feed opening, cavity
design and capacity, which Metso claims, is
the best in the market.
This ensures high crushing perfor-
mance with even the hardest feed and
helps maintain operational costs. In addi-
tion, safety features have been enhanced.
The steep cavity and easily changeable
stroke ensures high performance when
using a power rating as high as 55 kW.
An R8-million export order for two Osborn
Telsmith 36 x 48 single toggle jaw crush-
ers and an apron feeder, to be employed
at Petra Diamonds’ Williamson mine in
Tanzania, has been awarded to Osborn.
This is the latest in a series of orders
that the Johannesburg-based manufac-
turer has received from Petra Diamonds.
Osborn’s Chris Slade elaborates: “Osborn
already has jaw crushers and apron feed-
ers in this application at Petra operations
in South Africa, and these have proved
themselves over the years. Osborn
has also previously supplied an apron
feeder to Williamson mine in Tanzania’s
Shinyanga Province. This latest order
reflects our client’s confidence in our
products’ quality and performance.”
The scope of Osborn’s contract
included manufacturing and supply-
ing Williamson’s new jaw crushers, as
well as supervising their installation and
commissioning.
The single toggle crushers are
Telsmith jaw crushers prove their worth
designed for a high capacity through-
put due to the elliptical movement of
the swing jaw, which also assists in the
discharge of the crushed material. “As
the single toggle crusher will achieve far
higher capacities than the double toggle
design, they are often used as a primary
crusher,” Slade explains.
The Osborn Telsmith single toggle jaw
crushers offer a production capacity up to
1 000 t/hour and boast rock compressive
strength up to 500 MPa. They feature a
patented hydraulic beam locking system
The apron feeder for Petra Diamonds’ Williamson mine
in Tanzania.
and excellent nip angle, with reversible
jaw dies for maximum wear.