Process for operating a plant for producing calcined clay

摘要

The production of calcined clay is effected by using a plant known per se for producing cement by the dry or semiwet process, with a precalciner (1), for instance comprising at least one preheating line of series-connected preheating stages (2), such as cyclone preheaters or grate preheaters, and a rotary kiln or roaster (3). In accordance with the invention, the rotary kiln or roaster (3) for generating heating gas is utilized as combustion chamber (31), replaced by a combustion chamber (3') and/or completed by an additional combustion chamber.