一般认为,用于高炉喷吹的煤,因为在燃烧时较早出现的气相反应会使温度迅速提高,故煤中挥发份越高(达30～40％)燃烧效率就越高。但是最近加拿大能源研究实验室研究发现,燃烧时焦油的生成量对于燃烧效率有很大影响。也就是说焦油 It is generally believed that the coal used for blast furnace blasting has a higher combustion efficiency because of the higher volatile content (up to 30 to 40%) in coal due to the rapid increase in temperature due to the gas phase reaction earlier in combustion. However, a recent study by the Canadian Energy Research Laboratory found that the amount of tar produced during combustion has a significant effect on the combustion efficiency. This means tar