Process for the production of sintered dolomite in a rotary kiln

摘要

Starting from ground, predominantly carbonate-type raw material which is compressed into briquets and then sintered, it has hitherto been possible to produce high-grade sintered dolomite only in a shaft furnace. The novel process allows the production of briquet sintered dolomite having apparent densities of  3.20 g/cm3 with foreign oxide impurities in the sintered dolomite of  3.5 % in a rotary kiln installation at a temperature of up to 2000  DEG C in the rotary kiln. …??This is achieved by very finely grinding the raw material and charging the briquets prepared from this in a rotary kiln installation to the deacidification unit upstream of the rotary kiln and heating them therein without attrition. A high-grade sintered dolomite is obtained as refractory base material for the manufacture of basic refractory bricks.