Regarding specific heat consumption (Kcal/Kg of Clinker) of kiln if we use 100% Pet Coke with 1% residue on 90 micron in place of coal

Hello Rajuram,

Generally speaking, the use of petcoke results in a higher specific heat consumption than coal.

This is primarily due to the higher O2 levels required in the kiln inlet to prevent build-ups and blockages resulting from the very high sulphur content of petcoke (usually up to 7% as S). Higher O2 levels require more secondary air to be heated, increasing heat consumption. Higher secondary air flow also causes an increase in electrical energy consumption (kWh/t) due to higher power requirement of the ID fan. There may also be a reduction in kiln production rate if your ID fan capacity is limited, which would also result in an increase in heat consumption.

Also the very low ash of petcoke means that less clinker is produced per tonne of kiln feed. This also increases the specific heat consumption.

Regards,

Ted.

Dear Sir,

Thanks a lot for your valuable explanation.

With Best Regards,

Rajuram Sharma