The parameters for selecting the machine sizes to be used have been accurately evaluated through scientific research work. For cement plants, which generally treat similar feed materials, grinding test work is normally not required because equipment layout can be reliably determined using a process database based on the utilization of HPGRs in many commercial plants.
Grinding test work may be required if the feed material in question has not been previously encountered or documented. Testing is also necessary to evaluate the degree of wear inflicted on the rollers by special feed materials. The results of such trials are needed to select the most suitable roller surface from Köppern's wide range of solutions for the required application.
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