导言在美国由于对天然气的短缺,使得对燃料的替换显得更为重要了。这对于明尼苏达州铁矿来讲更感到现实。许多球团厂在球团焙烧中加用重油,甚至用煤来代替天然气。另一可取代的燃料来源被认为是煤的气化。这就是本文要谈的题目。 Introduction In the United States, the replacement of fuel is even more important due to the shortage of natural gas. This is more realistic for Minnesota iron ore. Many pellet plants add heavy oil to pellets and even use coal instead of natural gas. Another alternative fuel source is considered to be gasification of coal. This is the topic of this article.