Kiln Precoat Filter Estimation

In this expression, X is the mud flowrate to the precoat filter, r is the percent solids in the mud to the precoat filter, and S is the specific gravity of the mud. 

Defining (J) as the percent solids in the mud from the precoat filter, then  

The Btu needed to evaporate this quantity of water and to raise the vapor to the back-end temperature of the kiln is  

The decrease in fuel oil consumption when the solids out decreases from (j)j to (j)2 is therefore given by the following expression  

This last expression serves as the working formula. Note that natural gas may be substituted for fuel oil, whereby the only resulting change will be the heating value in the derivation. 

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