An export order to Guinea has been secured by mining and quarrying equipment specialist Osborn. This order for a vibrating grizzly feeder that will be employed at a Russian-owned gold mine in Guinea, west Africa, reflects the global reputation of the high-quality machines manufactured in South Africa by Osborn, comments area manager Joe Sequeira.
He reports that Osborn has supplied an Osborn GBEX 2 000mm x 4 400mm vibrating grizzly feeder to NordGold’s Lefa gold mine, which is situated some 700km north east of Conakry, the capital of the Republic of Guinea.
The unit features a fully fabricated 350 WA steel main frame assembled with tough huck bolts; and an exciter drive beam that is stress relieved. Sequeira expands on the exceptional features offered by this Osborn gearbox driven vibrating grizzly feeder:
“Each of its two UG40 exciter drives boasts sturdy, soundproof cast metal housings and two synchronised shafts with gears mounted on swivel joint, heavy duty roller bearings. Lubrication is achieved by a combination of oil bath and oil mist (splash), while the eccentric weights attached to both ends of the shaft can be adjusted by adding or removing steel or lead weights and steel plates.
“Coil spring vibration isolation is used, and the drives have pan liner support frame crossbeams. Wear liners on the pan area are VRN 200; 10mm on the bottom and 8mm on the sides. Grizzly bars are installed individually, with half bars on the sides (or complete cartridge), held down with hex bolts.”
In addition to its gearbox driven Gbex machine that is used extensively for extremely heavy-duty mining applications, Osborn offers a wide selection of vibrating grizzly feeders.
- The light duty Osborn Obex machine has a vibrator motor drive;
- the middle duty Osborn Telsmith series features a twin shaft drive and is often used for aggregate production;
- the heavy-duty Osborn Linear series has a twin shaft or quadruple shaft drive.
Osborn vibrating grizzly feeders are available in single or stepped deck configurations with a minimum grizzly length of 1.2m up to 3.6m. Widths are available from 900 mm through to 3 000mm.
Sequeira explains that the vibrating grizzly feeder is generally used to feed the primary crusher.
“They are often referred to as brute force feeders due to the constant impact loads to which this feeder is subjected.
“Osborn is proud to have its strong, powerful vibrating grizzly feeders in operation around the world, and this latest export to Guinea reflects this tough machine’s growing worldwide renown,” he concludes.