Global warming is a common subject in steel industry in every country. International cooperation will be required using the Kyoto Mechanism from global aspect. In the integrated steel works, there are various means to decrease reducing agent at blast furnace, however, preferable way to reduce CO_2 emissions must be chosen considering energy balance in whole steel works, and energy saving must be actively pursued. Injection of waste plastics is better alternative. Regarding oxygen blast furnace and smelting reduction, the possibility of CO_2 reduction is dependent on optimum system design of total process including outside process and the possibility of sequestration process. Charge of prereduced sinter and high reactivity coke to blast furnace leads to reduction of CO_2, keeping current blast furnace facility and capability.
展开▼
