北京科技大學的學者為了研究含碳球團礦還原熔分機理，將分析純的Fe2O氧化物和不同還原劑固結成球并進行等溫還原實驗，研究了溫度、還原時間、配碳量、還原劑種類等條件對球團礦還原熔分行為的影響。進一步采用X射線衍射、掃描電子顯微鏡等手段表征了含碳球團在不同還原時間的微觀結構及物相變化，實驗結果表明：焙燒溫度過低或過高含碳球團都不能良好熔分，配碳量增加可以提高球團還原和熔分速率，適宜的溫度、碳氧摩爾比、還原劑分別是1400℃、1.2和煤粉。
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另外Ni會與爐氣中的S發生反應形成熔點更低的NiS網狀組織，會破壞鋼錠在較低溫度下形成的保護膜，使氧化加劇，氧化鐵皮層厚度增加。加熱工藝鋼坯加熱時，隨著溫度的升高，Fe和Ni的擴散家督，形成的富Ni的金屬網絲和顆粒不斷延伸，氧化層不斷加厚，粘附性很強，對除磷造成困難。除磷系統除磷系統不合理，也會弱化除磷效果。控制措施是：化學成分下調NCr元素質量分數，至0.12%、0.13%，降低除磷難度；同時為保證鋼板強度，上調C元素質量分數，至0.16%。
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