Dear Bashar,

Certainly improving the collection efficiency of the cyclones in the preheater will improve the kiln feed to clinker ratio. With kiln feed of typical lime saturation and calcium carbonate content the kiln feed to clinker factor would be expected to be around 1.54 due to loss of CO2 from the CaCO3. That factor is increased by the dust losses from the preheater to the raw mill and dust filters. If your factor is 1.75 then you must have high dust losses from the preheater so improving collection efficiency will reduce the factor. However, it will also increase the pressure drop across the preheater. Does your induced draft fan have sufficient spare capacity to operate with a higher pressure drop across the preheater?

Dr Michael Clark