21. A fluid energy mill is used for
22. A __________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream.
23. The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the
24. The specific cake resistance for compressible sludges is a function of the pressure drop
25. __________ balls capable of grinding the feed in a ball mill gives the maximum efficiency.
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