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1 前言自八十年代以来,在各种直接还原方法中,回转窑直接还原法发展最快,而且已应用于大规模的工业生产中。用煤作为能源和还原剂的直接还原在七十年代还是处于次要地位,但是到了八十年代初,随着煤气和
1 Introduction Since the 1980s, direct reduction of rotary kilns has been the fastest-growing method in various direct reduction methods and has been used in large-scale industrial production. Direct reduction using coal as a source of energy and reductant was still a secondary activity in the 1970s but by the early 1980s, as gas and