Hi

If that is the case the following may be tried

1. By increasing the rawmeal fineness

2. By increasing the calcination in the precalciner 

3. By slighly reducing the LSF with out much affecting the cement strenght

4. To run the kiln at higher speed than earlie so as to have better heat transfer and lesser % filling inside the kiln

Regards

Vinayak

dear mb14

I am sure that you would have tried with kiln coal, kiln rpm and kiln feed lsf upto your best. I would like to confirm whether the alumina ratio (AM) in kiln feed is higher or not, If it is higher (ie; AM>1.6), then try to decrease it first (to about 1.2-1.3). If AM is not higher, please give the full analysis of your kiln feed (also resedue), which will help me to analyse the problem.

Dear All ,

Thank you all for your concern and replies  ,

Actually that is what I meant  as Mr.Nael explained ,how to avoid the high liter weight and without getting higher  free lime .

our kiln feed AM is 1.4

Your kiln feed burnability seems very hard burning.It is my suggestion to do complete minerological analysis by optical microscopic to know calcite and quartz grain size and free silica present in your limestone.All the said parameters will affect your burnability your kiln feed.After complete mineralogical analysis you are in better position to take counter-measures.All  possible solutions given by different persons are based on  their perception.

Regards,

R.M.Sahu

India