Modern Mining August 2018

ELECTRA MINING PREVIEW

the company has chosen to service Gauteng, a region that has more cranes in a single indus- trial area than can be found throughout the entire City of Cape Town. As a premier turnkey service provider, RGM Cranes’ services range from conception, design, manufacture and installation to repairs, mainte- nance, upgrades and conversions of any type of lifting equipment. The company has ISO: 9001 accreditation for quality management that gov- erns all processes within the supply chain. “From the foundations of your new build- ing right down to the smallest lifting point or shackle, we provide every conceivable lifting item to our clients. From the ground, up to the crane and from the crane back down to the load,” says Dowling. RGM Cranes entered into a partnership with the Turkish-based company, Güralp Crane and Machine, in late 2015, a collaboration which has reportedly proved very successful. Güralp introduced the GMD range of wire rope hoists into the Turkish and European markets more than 10 years ago. The GMD range features maintenance friendly design coupled with advanced electrical systems for hoist and load monitoring. Leading vibrating screen and feeder OEM Kwatani will be showcasing customised

products, big and small, with live demon- strations showing the value of its laboratory test screen. With a replica of the nose of its widest screen at its exhibition stand, visitors will sense the

International rugby star, Tendai ‘Beast’ Mtawarira, in front of one of Kwatani’s beasts.

Customised grinding ball design from Sino Grinding The sheer size and scale of new ore processing operations means that primary SAG mills have grown to larger capacities, in the process placing greater demands on grinding media. Paul Peng, CEO and chief metallurgist at Sino Grinding Industries (SGI), which is exhibiting at this year’s Electra Mining, emphasises that it is critical that grinding media are designed andmanufactured to meet these increased demands. A primary influence on maximised performance is the longevity and over- all health of the grinding media.

Marketing Manager of Africa, Europe and Middle East. In 2015, after an on-site assessment in a giant copper mine in Mongolia, Sino Grinding’s technical team chose Sino-4 balls as the only suitable SAG ball type to supply the 38-foot SAG mills and drop the ball breakage from nearly 80 % to less than 1 %, providing a significant saving and production improvement to the client. Two years later, Sino-6 balls replaced the Sino-4 balls in these SAGmills and delivered an additional two-digit percent improvement in wear rate. 

“There are standards of steel manufacturing for specific applications and each end use is covered by an ISO, AS, JIS or other basic chemistry design. However, with grinding media, there is not one specific standard that provides a basic grade for steel grinding media. Sino Grinding therefore went back to the drawing board to define the purpose of all media it pro- duces,” says Peng. Sino Grinding’s current product range includes seven differ- ent types and grades of forged steel SAG grindingmedia in sizes ranging from 90 mm to 155 mm. Each grade has variations in chemistry, physical characteristics and efficiencies to suit the various grinding and impact environments of mills. “The key to ensure grinding balls will perform optimally is to dispense with the assumption that a single ball design can work well for all sites. One needs to factor in variations such as mill size, ore type and characteristics, final grind targets and milling work practices,” adds Pieter Theunissen, Sino Grinding’s

Sino Grinding delivers grinding media that work effectively with a process- ing plant’s ore characteristics, milling method and other objectives.

August 2018  MODERN MINING  49