Carbon from either coke or cod can be combusted in the tuyere and raceway zone of a blast furnace to form hot reducing gases. These gases are used to reduce iron oxides, preheat burden materials, and produce molten hot metal and slag, there fore, pulverized coal (PC) can be injected into the blowpipes of a blast furnace to decrease coke requirements. Generally, injected PC affects the high temperature zone differently than coke. This is because PC contains more hydrogen, less carbon and produces less thermal energy per pound.
展开▼
