本文从热力学角度分析了高铁赤泥煤基直接还原过程中固相反应的可能性和条件。赤泥还原焙烧过程中，铁橄榄石和铁尖晶石的生成过程是金属铁首先被赤泥中的残氧氧化成ＦｅＯ，进而扩散至固态反应物界面的固相反应过程；在还原过程中存在碱性氧化物效应，即碱性氧化物能从铁橄榄石和铁尖晶石中置换出ＦｅＯ，籍以提高ＦｅＯ的活度，使得赤泥的还原条件大为改善，产品的金属化程度显著增加 In this paper, the possibility and conditions of solid-phase reaction during direct reduction of high-speed railway red-mud coal-based coal were analyzed from the perspective of thermodynamics. In the process of red mud reduction and calcination, the formation of fayalite and iron spinel is the solid phase reaction process in which metallic iron is firstly oxidized by residual oxygen in red mud into FeO and then diffused to the interface of the solid reactant. During the reduction process, Alkaline oxide effect, that is, basic oxide can replace FeO from fayalite and iron spinel to improve the activity of FeO, greatly improve the reduction conditions of red mud and significantly increase the metallization degree of products