Study on Hot Blast Stove With Efficient Double-Preheating System

摘要

In order to satisfy the demand for high temperatur eblast. Anshan Iron and Steel Group Co. has developed a new process, additional preheating heat-exchange system only with low calorific value blast furnace gas. The syste consists of a externally fired preheater used blast furnacs gas as heating medium and two large recuperators and some facilities. The new system is able to preheat air and gas up to 270deg C and 240deg C respectively. The hot blast temperature is raised by 80-100degC. The coke oven gas of 3000 m~3/hr was saved and the dramatic economic profit is obtain as well.