| 摘要 |
<p>A precalciner rotary kiln system (1) for cement manufacture. According to the invention there is provided an oxygen source (20) connected to the hot air duct (16) leading to the precalciner (10) of the precalciner rotary kiln system through a dosage unit comprising an endless header pipe (22) provided around the hot air duct and connected to the oxygen source through an oxygen inlet line (23) and a plurality of nozzles (25) connected to the header pipe and protruding into the hot air duct. The nozzles are staggered along the hot air duct and tilted in the direction of flow of hot air through the hot air duct (Figs 1 and 2). <IMAGE></p> |
