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The total energy consumption for ore comminution will further increase within the next decades. One contribution to minimise the increase is to use more efficient comminution equipment. Vertical-roller-mills (VRM) are an energy-efficient alternative to conventional grinding technology. One reason is the dry in-bed grinding principle. Results of extensive test works with two types of magnetite iron...
The classically accepted mechanism for binding fine iron ore concentrates by bentonite clay is that the clay becomes hydrated, expands, disperses, and then dries into a bonding film that holds the iron ore particles together. However, bentonite has been observed to form a fibrous structure on the surface of foundry sands, which is relevant because foundry sands are produced under similar conditions...
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