Modern Mining February 2016

PRODUCT News

Roll crushers prove themselves in coal

Double roll crushers manufactured locally by Osborn are proving their mettle in the tough coal industry, where they are increas- ingly being chosen for their low fines generation, says product sales specialist Etienne Swanepoel. He reports that Elandsfontein-based Osborn has netted an order for a 4848 double roll crusher from a long-standing client near Delmas. This follows on the heels of the sup- ply of two 3054 Osborn double roll crushers, manufactured and delivered within a testing time frame, to a different coal operation in the vicinity of Lephalale. “Our durable and reliable double roll crush- ers have earned a reputation for less fines generation due to a lower roller speed versus a rolling ring crusher. Other features that are contributing to their burgeoning success in the coal industry include their unique hex- agonal drum design and lower power usage,” Swanepoel comments. He notes that Osborn double roll crush- ers can be used for primary, secondary and tertiary crushing, depending on the feed size and the product size required. “The one 3054 unit delivered to Lephalale is being used in a primary application and the other as a second- ary crusher. The feed reporting to the primary 3054 is 450 t/h at a -150 mm lump size. Our crusher reduces it to -40 mm and this then reports to a single deck screen and thereaf- ter to the secondary 3054 double roll, which yields a final product of -25 mm.” After experiencing 400 % growth in the local market over the past year, Umzamo Analytical Services (UAS) says it has set its sights on cli- ents beyond South Africa’s borders. UAS will focus on expanding its business into Southern Africa in the coming year. CEO Audrey Ndlovu, who will be spearheading the process of targeting clients in the region, says that everyone in the company is ready for the expansion. “Yes, there is competition for us in this region but with our expertise and professional- ism in place we are ready to face it.We have the expertise and capacity and we use the latest technology and equipment. We also have the ability to be flexible and efficient without com- promising the quality of our services,”she says. She credits the growth experienced by

Osborn 3054 double roll crusher working at a coal operation near Lephalale. Swanepoel says the Osborn double roll crusher is generally regarded as a 4:1 feed- to-product ratio crusher but that in some instances, dependent upon material friability and hardness, it is possible to achieve a 6:1 crushing ratio. Each roll assembly comprises renewable and reversible toothed segments, bolted and keyed to a robust hexagonal hub with the nuts inside the hub, Swanepoel explains. He says that when the correct crushing ratio is used and the optimum roll diameters selected, the segments will grip the feed material more effi- ciently and will not allow pieces to roll on top of the segments due to the incorrect nip angle. He notes that the crusher’s locking nuts are securely located in fabricated pockets in the drum, which allows for the removal and replacement of segments from the outside the company over the past twelve months while working within the South African mar- ket to its hands-on approach, its passion for the industry, and its extensive knowledge in coal sampling and testing. “We have become synonymous with providing uncompromised, accurate, analytical results which bodes well for expansion as we have the opportunity to build on a solid reputation,” she explains. UAS has the capacity to offer the coal min- ing industry in Southern Africa coal analytical services that have quick turnaround times enabling factual, financially stable decision making for its clients. “We offer convenience and greater efficiency,” says Ndlovu. “We are able to set up on-site laboratories for our cli- ents’ convenience.” UAS, website: www.u-a-s.co.za

using only one tool (an Allen key). Osborn Engineered Products, tel (+27 11) 820-7600 Umzamo sets its sights on expansion

February 2016  MODERN MINING  41