Modern Mining September 2018

PRODUCT News

Rubber compound delivers increased wear life

will not only benefit from the increase in wear life, but they will notice a measurable reduction in installation and maintenance costs as a result of a longer run schedule. Weir Minerals has been sup- plying the Vulco® R63 rubber compound to mill lining applica- tions across the globe for over 50 years. Whilst this technology performs well in most grinding applications, many suppliers are perceived by the market to offer similar rubber compounds with

dards and procedures. Hard-faced bolts, with galvanised Nyloc nuts and washers, are also available for specific applications. Tempo is not only 100 % black-owned, but also has a Level 1 Broad-Based Black Economic Empowerment (B-BBEE) rating, which means it is well placed to undertake government infrastructure projects, as well as meet the specific criteria of mining houses. Rio-Carb, tel (+27 11) 011-6111 One operation to reap the benefits of the premium R67 rubber compound is Simplot Phosphates. Operating a phos- phate mine, north of Vernal, Utah, this long-standing customer of Weir Minerals agreed to trial the liner with R67 rubber. After a nine-month trial, the liner achieved a 29 % improvement in wear life and had 20 % service life remaining when it was removed. The trial also achieved an esti- mated 25 % reduction in maintenance and reline costs. Rajen Govender, Weir Minerals Africa, tel (+27 11) 929-2701 used in the market today,” states Dr Michael Lum, Materials and Elastomer Development Manager for Weir Minerals. The Vulco® R67 rubber compound is visually different from others in the market place, with green capped ends on the lifter bars. “During the product development pro- cess we added a green pigmentation to the formulation to visually set our lifter bars apart from the competitors. Now when a mill operator sees the distinct green strip on the lifter bar, they will know they have a premium product,” says Lum. Over 10 trials spanning four continents have shown significant wear life improve- ments, in some cases exceeding a 50 % increase in wear life. Weir Minerals is confi- dent the latest R67 rubber technology will help operators across the globe get the most out of their mills.

Fields results show that the new Vulco® R67 mill lining rubber compound from Weir Minerals delivers an increase in wear life of 20 %. “This is a breakthrough in the industry; a rubber mill liner that in extensive global trials delivered on average 20 % longer life than comparable composite lifter bars. This means less shut-down time for main- tenance, which in this highly competitive environment represents a measurable out- come to our customers’ productivity and bottom line,”states Mathias Kuhrke, Global Product Manager for Mill Lining Systems at Weir Minerals. The innovative premium rubber com- pound is the most wear-resistant Weir Minerals has ever formulated. Operators using R67 lifter bars within their mills R67 rubber technology will help customers get the most out of their mills.

sealing between components. “We offer our customers the lowest total cost of ownership by means of even wear distribution, in addition to continuous improvement of the actual cyclone lining,” states Malatji. Here the key measurements in performance monitoring are the sharp- ness of separation, the misplacement or rejection of product, and the separation point itself. Tempo also offers pneumatic con- veying lined pipes for applications as diverse as pulverised fuel pipes for power stations, furnace feed pipes, and for pneumatic drier systems. Its hard- facing service provides for excellent strength, being welded directly onto a mild steel backing, in accordance with American Welding Society (AWS) stan- no real differentiation. Weir Minerals iden- tified a clear gap in the market for a rubber compound that could increase the wear life of its mill liners and outlast the rest. After extensive field research on the current rubber compounds available to the market, Weir Minerals engineers and material scientists developed the unique patented material that forms the R67 compound. “Using our extensive in-house knowl- edge, experience and expertise, we were able to develop a newWeir proprietary elas- tomer that is able to withstand the severe abrasion typical in mill systems applica- tions. Our Vulco® R67 compound utilises new technology and chemistry in elastomer formulary which overcomes the limitations of more traditional elastomer compounds

Refurbishing service offered for DMS cyclones Tempo Mineral Processing (Tempo) offers a service whereby Dense Medium Separation (DMS) cyclones can be refurbished for even wear distribution and extended life.

This allows for improvedmass balance of DMS cyclones in terms of the separation or cut size, the flow split between the over- and underflow, the sharpness of the classifica- tion, and the capacity (pressure drop). This all translates into a dramatic increase in total efficiency, says Tempo Mineral Processing Director Thabisho Malatji. The lifecycle of a DMS cyclone can be extended significantly by the applica- tion of a reaction-bonded silicon carbide (RbSiC) lining on the spigot and lower cone portion in particular, with the lining pat- tern running against the material flow for minimum gaps and steps and optimal joint

Tempo offers what it says is a unique DMS cyclone refurbishment service.

54  MODERN MINING  September 2018