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      Cyclone(s) Tromp Curve              
                           
      Company/Plant        
      Mill N°              
      Cyclones        
                           
      Number of sieves (minimum of 6)            
        % Passing cumulated              
      Sieves (µ) Feed O'Flow U'Flow Efficiency   % Tromp   Tromp reduced   Intervals        µ  
      % %  
      % %  
      % %  
      % %  
      % %  
      % %  
      % %  
      % %  
      % %  
      % %  
      % %  
      % %  
     
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      Circulation factor   Circulating load %      
      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.      
      D limite µ                
      By-pass %                
      D50% (Cut size) µ                
      Imperfection   hydrocyclone (s)   I = (D75-D25)/2.D50    
      Sharpness           Sh = D25/D75    
      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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