METHOD AND APPARATUS FOR CONTROLLING THE DEGREE OF PREPARATION OF RAW MATERIAL FOR CEMENT

摘要

Method and apparatus for controlling the degree of preparation of raw material for cement to be fed to a rotary kiln from a pre-heating zone comprising a series of ducts and separation chambers wherein, when the raw material has reached a temperature intermediate the decomposition temperatures of magnesium carbonate and calcium carbonate, the raw material is subjected to a rapid temperature drop capable of delaying calcium carbonate decomposition until the raw material has entered the rotary kiln.