The maximum head from rubber-lined centrifugal pumps is about 30 m. The maximum head from all-metal pumps is about 55 m. This lets you very easily work out the minimum number of pumps to be installed in series.
Usually a comfortable concentration is 10 to 15 %v less than the final settled concentration (Aude and Thompson 1985). The settled bed concentration can be determined by allowing the slurry to settle and then calculating its settled concentration by comparing the column height of the fluid to the column height of the liquid-slurry interface.
Abrasive wear for a given slurry increases by the velocity to a power of somewhere between 2 and 3.5 (Wiedenroth 1984).
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