北京科技大學(xué)的學(xué)者為了研究含碳球團(tuán)礦還原熔分機(jī)理，將分析純的Fe2O氧化物和不同還原劑固結(jié)成球并進(jìn)行等溫還原實(shí)驗(yàn)，研究了溫度、還原時(shí)間、配碳量、還原劑種類等條件對(duì)球團(tuán)礦還原熔分行為的影響。進(jìn)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(tuán)在不同還原時(shí)間的微觀結(jié)構(gòu)及物相變化，實(shí)驗(yàn)結(jié)果表明：焙燒溫度過低或過高含碳球團(tuán)都不能良好熔分，配碳量增加可以提高球團(tuán)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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燃?xì)鈮毫﹂_關(guān)，DG40VC1-5WG/B，75454579
燃?xì)鈮毫﹂_關(guān)，DG17VC1-6W/B，75455241
燃?xì)鈮毫﹂_關(guān)，DG40VC1-6W/B，75455243
燃?xì)鈮毫﹂_關(guān)，DG110VC1-6W/B，75455245
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另外Ni會(huì)與爐氣中的S發(fā)生反應(yīng)形成熔點(diǎn)更低的NiS網(wǎng)狀組織，會(huì)破壞鋼錠在較低溫度下形成的保護(hù)膜，使氧化加劇，氧化鐵皮層厚度增加。加熱工藝鋼坯加熱時(shí)，隨著溫度的升高，F(xiàn)e和Ni的擴(kuò)散家督，形成的富Ni的金屬網(wǎng)絲和顆粒不斷延伸，氧化層不斷加厚，粘附性很強(qiáng)，對(duì)除磷造成困難。除磷系統(tǒng)除磷系統(tǒng)不合理，也會(huì)弱化除磷效果。控制措施是：化學(xué)成分下調(diào)NCr元素質(zhì)量分?jǐn)?shù)，至0.12%、0.13%，降低除磷難度；同時(shí)為保證鋼板強(qiáng)度，上調(diào)C元素質(zhì)量分?jǐn)?shù)，至0.16%。
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