METHOD AND PLANT FOR HEATING RAW MATERIALS

摘要

Described is a method for heating raw materials (1), such as cement raw materials, limestone or other mineral-containing raw materials, by which method the raw materials and a secondary fuel (5) are introduced in a material inlet end (6) of one and the same rotary kiln (3) through which the raw materials (1) as well as the secondary fuel (5) are transported while being heated by gases formed by burning of a primary fuel. The method is characterized in that the secondary fuel (5) and the raw materials (1) are introduced in batches one after another in the material inlet end (6) of the rotary kiln (3).