Spurite ring formation in cement kiln?

carbonate or spurite ring are form through CO2 resorption into the freshing formed free lime or even through belite recorbonation in the kiln. these rings are harder and exibit the same chemistry as regular clinker, the presence of spurite a minral with composition CA2SO4 CACO3,

When the carbonate in the spurite is replaced with sulfer, the new material is called sulfated spurite.

Spurite ring basicaly form when ever the partial press of CO2 above the bed of material is high enough to invert the calcining reaction increase the ground silica rich rawmixes and free lime does not have sufficient lime in the calcining zone to react with silica therefore increasing the chances for spurite deposit in the kiln.

Rajesh Shukla

Chief Genral Manager Production

Manikgarh Cement gadchandur