Fired doloma linings are used extensively in the centers of rotary cement kilns burning zones. In the last several years developments in doloma based bricks have extended their use into lower transition zones and lower sections of the upper transition zone adjacent to the sintering zone. The new developments have included magnesia enrichment (both fused and sintered), zirconia additions and tar impregnation which have enabled improved performance through lower porosity and reduced permeability and improved resistance to corrosion by alkalis and sulfur compounds. The paper will discuss these new developments and their performance.
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