贫铁矿煤基直接还原过程中，贫铁矿中的铁氧化物除被还原成金属铁外，还有相当数量的铁氧化物同硅酸盐矿物发生固相反应，生成铁橄榄石和铁尖晶石类化合物。结果表明：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，使得贫铁矿的还原条件大为改善。 In the process of direct reduction of the poor iron ore base, the iron oxides in the poor iron ore are reduced to metallic iron, and a considerable amount of iron oxides undergo solid phase reaction with the silicate minerals to form fayalite and iron tips Spinel compounds. The results show that there is a basic oxide effect in the reduction process. That is, the alkaline oxide can replace FeO from fayalite and iron spinel, so that the reduction conditions of the poor iron ore are greatly improved.