Another factor to be taken into consideration is that the media conveyed is often corrosive. In general, engineers designing for process efficiency find that material and equipment capabilities pose the most serious limitations on allowable process conditions.
The most abrasive media found in the mining industry are slurries resulting from hard ore types and ferro silicon. The media and process properties vary in different parts of the extraction process. In metal-extraction mines and plants, for example, abrasive slurries are found in the milling, cyclone, and DMS circuits, again in concentration feed and tailings, and to a lesser degree in flotation and thickener areas.