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    Birotator mill power calculation (central discharge)  
    Calculator valid for raw meal, cement or other materials
             
    Date      
    Cement plant
    Mill number    
    Diameter m    
    Speed of rotation rpm     -----> % of critical speed
             
    Drying chamber        
    Diameter (*) m     
    Usefull length (**) m    
    Power of drying chamber kW    
    (*) Drying chamber diameter is the same as mill diameter or lower
    (**) Usefull length of drying chamber with transfer diaphragm included
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    Chamber 1        
    Usefull length m    
    Filling degree % tons of balls
    Power of chamber  1 kW    
             
    Chamber 2        
    Usefull length m    
    Filling degree % tons of balls
    Power of chamber  2 kW    
            No
    Power coefficients        Less than 50%
    Annular (Ring) motor
        More than 50%
    Slag in the fresh feed 
         
    Fresh feed is alumina clinker
    (ciment fondu)  
    Fresh feed is iron ore
         
    Thin lining in chamber 2
    (< 60 mm)    
    Cylpebs in chamber 2
         
             
    Absorbed power of the mill kW
             
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    All rights reserved © 2012-2015 The Cement Grinding Office