SOME EXPERIMENTAL STUDIES OF COAL INJECTION INTO SLAGS

摘要

Based on the gas compositions, the reaction rate of low volatile coal reaction with moderate FeO slag is reasonably well described using published rate constant for gasification of metallurgical coke. The rate- limiting step is mainly carbon gasification, but there is a significant contribution from the slag gas reaction particularly for long injection times. The maximum gasification rates of carbon in slag was found to be around 0.3 to 0.55 g/s under the present conditions. For the longer injection, they can be up to 1.1 g/s. The void fractions of foamed slag lie between 0.64 and 0.82 with foaming heights 12 to 20 cm, which shows some deviation from currently available prediction methods. This requires further study.