MechChem Africa April 2020

Available to the mining industry globally, the new FLSmidth trommel frames and light-weight screen media boost milling productivity through increased durability, modular screen media and digital optimisation. Efficient milling productivity with FLSmidth trommel screens

toring programme is well documented as being a sound investment which, amongst other benefits, reduces maintenance costs, minimises ‘surprise’ machinery failure and therefore enhances productivity and com- ponent reliability and availability. WearCheck conducts preventive main- tenance programmes for industries ranging from mining, earth-moving, power genera- tion, aviation, shipping, construction, trans- port and others. In addition to oil and other fluid analysis, the company offers a wide range of reliabil- itysolutionsincludingropetesting,technical compliance and non-destructive testing. For managing director Neil Robinson, a source of pride is the company’s status as the only condition monitoring company in Africa with ISO 9001 quality certification and ISO14001 certification for its environ - mental management programme, as well as ISO 17025 accreditation for its laboratory- centric qualitymanagement programme. q Installed between themill discharge trun- nion and the trommel, deflectors provide a homogenous and controlled feed of the mill discharge pulp onto the trommel screening surface. This allows maximum use of the available surface area. The deflectors assist in improving pulp distribution thereby im- proving screening efficiency. Deflectors also contribute to improved screening media life. FLSmidth trommel frames and screen media boost milling productivity through increased durability, modular screen media and digital optimisation. The company drives success through sustainable productivity enhancement. q To ensure rapid delivery and streamline inventory management, screening me- dia is available in two standard sizes and in a number of thickness combinations. The modular screen media panel sizes are 657 mm x 400 mm (25.86-in x 15.75-in) and 726 mm x 400 mm (26.75-in x 28.58-in). The standard dimensions allow FLSmidth to sup- ply a client’smedia fromany FLSmidthmanu - facturing centre, andguarantee themediawill conformtounparalleledquality requirements and material specifications, while providing equal fabrication reproducibility. Simple, digital optimisation For pulp flow, a state-of-the art discrete ele - ment modelling (DEM) software simulates a client’s trommel performance. It is then modelled so it can be optimised for the high- est recoveries and efficiencies. The DEM software also analyses the trommel’s mate - rial distribution to optimise screening media configuration.

A chievingefficientmillingproductiv - ity canbe tricky at times, especially since your mine may have specific terms of conditions, materials pro- cessing and other parameters. This is why FLSmidth works with clients to match feed conditions andother variables so they get the optimal trommel screen for their operations. Qualified engineers examine every aspect of a client’s screening process to help ensure ef - ficient pulpflowcharacteristics, proper sepa - ration, and maximum equipment availability. Part of this reduction of maintenance

tions services to industries in the Ashanti region. A new laboratory opened recently in Windhoek, where the Namibian mining industry and other operations now benefit from boosted productivity and improved reliability and availability of machinery. In Mozambique, WearCheck recently addedfueltestingcapabilitiestoitsportfolio of tests. The growing network of 17 WearCheck laboratories means that world class condi- tion monitoring services are becoming increasinglyaccessible toAfrican industries. The laboratories are situated inSouthAfrica (six), Zimbabwe, Zambia (two), Namibia (two), Dubai, India, DRC, Ghana (two) and Mozambique. WearCheck also operates various support offices and agencies in several other African countries. Opting for a tailor-made conditionmoni- downtime comes from a unique trommel frame design that utilises friction-grip clip rails, as opposed to bolts or pins, for installing the modular panels. As a result, no additional fixing parts are required. Focus on durability To extend and maximise asset life, the structural design of the trommel frames are verified throughfiniteelement analysis (FEA). This guarantees the engineering behind all components. Complete design verification byFEAcalculation includes static and fatigue/ strength assessment, as well as strength as- sessment on thebolts. Part of theprocess also includes a stress relieve of a client’s trommel frame after fabrication andbeforemachining, and the application of a protective lining on each frame in the areas exposed to erosive and abrasive wear. Modular screening media The modular screen media is designed to be highly efficient in material screening, with productivityandeaseof handling themainob- jectives. Available in rubber andpolyurethane material, FLSmidthmodular screeningmedia is suitable for all mineral-sizing applications.

FLSmidth trommel frames and screen media boost milling productivity through increased durability, modular screen media and digital optimisation.

WearCheck increases footprint in Africa South African condition monitoring spe- cialist, WearCheck, recently upgraded its Tarkwa lab in Ghana – to conduct extra testing (transformer oil, coolant and fuel) in addition to oil analysis – and relocated to a brickbuilding close to theoriginal converted shipping container.

The company alsoopened a second labo- ratory in Kumasi, in Ghana, that provides world class oil analysis and reliability solu-

WearCheck Kumasi laboratory supervisor Martin Acheampong (left) processes used oil samples in the company’s new lab in Ghana, while lab technician Charles Aggrey looks on.

24 ¦ MechChem Africa • April 2020