Using industrial waste for cement burning

Dear Tong,

I my knowledge lot of cement plants are using several waste material avaialble as a fuel in Kiln / Calciner. You may contact like FLSmidth, Wedag KHD Humboldt, Krupp, Thaysan, IFC, Some vendors in respective countries.

Can you share the information you know about in the matter?

 Thanks

R P Soni

Frankly, this question is far to broad to be discussed in this forum.

You better do a little research on the subject in the litterature. There are hundred of articles available in magazines like International Cement Review, World Cement, ZKG, etc..

If you have then more precise questions on the technology involved, we can maybe answer these here.

Best regards

Just a few of those many subjects to consider when not properly applied are

a. increased specific gas volume (approx. + 10% from coal as primary fuel) depending on chemical composition and moiture content resulting in reduced clinker capacity

b. higher exhaust gas temeperature due to after burning in lower preheater stsages

c. increase of CO-emmission

d. increase in calciner and lower preheater stages clogging due to increased volatile circulation

In all cases the influence of available alternative fuel on the pyro-process has o be investigated to avoid just those problems.

In europe some of the plant are virtually operating on 100% alternative fuel due to the lucrative waste disposal earnings however at an disadvantage to efficient cement production

Best regards,

WiZi