Why Use Alkaline Refractory Bricks for Precalcined Cement Kilns?
Why Use Alkaline Refractory Bricks for Precalcined Cement Kilns? During the calcination process of the pre calcining kiln clinker, a large amount of melt (liquid phase) appears in the kiln material from the back end of the upper transition zone. Some ingredients in the kiln material are calcined in the melt through the raw maturation material until it is out of the kiln. Within this range, alkaline refractory bricks that withstand high temperatures can meet their process performance requirements. The masonry length of alkaline refractory bricks is about (6~10)D of the kiln diameter, which is also the most severely damaged part of the lining brick. The use of the lining brick in this part directly affects the operation rate of the kiln. Therefore, the technological progress and product performance, and output status of basic refractory bricks are paid attention to by people. At present, the alkaline refractory bricks used in the pre-calcining kiln are mainly spinel magnesia bricks tha