Method for firing a rotary kiln with pulverized solid fuel

摘要

Disclosed is a method for firing a kiln as well as a method for producing cement clinker in which pulverized coal is initially entrained in an airflow of about 2% of the theoretical amount of air needed to combust the coal and transport it to a burner. Supplemental primary air heated sufficiently to vaporize volatiles in the coal is mixed with the coal flow in a burner, discharged into the kiln and hence ignited. Secondary combustion air heated to between 800 DEG F. to 1650 DEG F. and more is added in the kiln to effect the substantially complete combustion of the pulverized coal in the kiln.