Abrasiveness of iron ores : analysis of service-worn conveyor belts and laboratory Dry Sand/Rubber Wheel tests.
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2022
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Resumo
Belt conveyors are currently one of the most commonly used technologies for transporting iron ore. Of the
components of the conveyor system, the belt is the most expensive and susceptible to damage. Failures due
to wear of the rubber cover lead to downtime for corrective maintenance, greater operational risks and
performance and economic losses. To improve the tribological performance of conveyor belts, it is necessary
to know the main parameters that influence their wear. As wear behavior is not an intrinsic property of a
material, the most reliable results are obtained when the wear mechanisms produced in laboratory tests are
similar to those in service. In this work, two types were investigated of belt rubber, one new and one worn in
service, and four types of iron ore in two class sizes. Loose abrasive wear tests were carried out using the Dry
Sand/Rubber Wheel apparatus with belt rubber test pieces and iron ores as abrasives. This work characterized
the wear mechanisms that occur in service and in laboratory tests. The predominant wear mechanism found
was the formation of Schallamach waves. In the wear tests, Friable Hematite samples presented the highest
abrasiveness. In addition, the chemical, mineralogical and morphological features of the iron ore samples were
characterized. The high abrasiveness of Friable Hematite was possibly due to the mineral assembly.
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Abrasiveness, Iron ores, Conveyor belt, Worn surface characterization
Citação
NINS, B. et al. Abrasiveness of iron ores : analysis of service-worn conveyor belts and laboratory Dry Sand/Rubber Wheel tests. Wear, v. 506, artigo 204439, jul. 2022. Disponível em: <https://www.sciencedirect.com/science/article/pii/S004316482200196X>. Acesso em: 15 mar. 2023.