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      Tromp Curve              
                       
      Cement plant          
      Mill N°              
      Separator          
                       
      Number of sieves (minimum of 6)        
      For explanation, please go here:          
        % Passing cumulated          
      Sieves (µ) Feed Fines Tails Efficiency Tromp   Intervals  
      0       %     µ  
      %  
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      Circulation factor            
      Correlation          
                   
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      Interval for D75 from (*) µm      to µm D75 µm
      Interval for D25 from (*) µm      to µm D25 µm
      Interval for D50 from (*) µm      to µm D50 µm
      (*) In order to get D75, D50 and D25, it is necessary to define a trend line for each size.    
      For this and for each trend line, choose 2 points (sizes) to have the right interval.    
      For example, the interval for D75 can be from 64µ to 90µ. Both points of the interval    
      must be choosen looking the Tromp curve to get a realistic result.     
      And finally, both points (sizes) come from the intervals column here above.    
      Imperfection    separator        
      D limit µ            
      By-pass %            
      D50% (Cut size) µ        
      Important notice:              
      The converter doesn't allow logarithmic scale.
      In case of extreme results like huge circulation factor or by-pass, the calculator will probably
      give negative values for D25 and/or D50. A visual analysis is then required.
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