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Yasushi Ogasawara 《冶金译丛》2014,(3):17-22
为了提高脱磷效果,在顶底复吹转炉过程中开发了新的(FeO)控制体系。通过氧平衡和每间隔10s的渣容量计算了(%FeO),并且在操作屏幕上予以监测。 相似文献
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结合某厂生产X80管线钢实际状况,对复吹转炉双联工艺的炼钢脱磷过程进行试验,研究转炉炉渣碱度和氧化性对脱磷的影响。结果表明:在铁水磷含量为0.118%和0.116%,脱磷炉和脱碳炉终点渣碱度CaO/SiO2分别为1.6~2.0、3.3~4.1,T.Fe含量分别为10%~15%、20%~35%的条件下,脱磷炉脱磷率最高达50.85%,平均为38.35%,终点脱磷率最高为95.69%,平均为94.88%,冶炼终点钢水磷含量控制在0.007%以下,最低0.005%,满足X80管线钢生产要求。 相似文献
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在实验室利用转炉渣配制的铁水脱磷剂进行铁水预脱磷试验,测定了脱磷剂组成等因素对脱磷率的影响。结果表明:在铁水脱磷前[Si]≤0.15%条件下,当脱磷剂中转炉渣配比为80%时,相应铁水脱磷率约为78%;Fe2O3和BaCO3代替转炉渣的合适替代量分别约为5%和10%;脱磷剂中(P2O5)含量的增加会导致脱磷率的显著降低,其影响关系式为:ηp(%)=84.01—4.60(P2O5%)。 相似文献
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论述了120t转炉在复吹条件下的脱磷效果,讨论了复吹前后终点w(P)、w(FeO)和炉渣碱度对脱磷反应的影响,从热力学角度分析了复吹前后脱磷效果的差异. 相似文献
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为满足用户对钢中磷含量的要求,攀钢采用“双渣法”转炉脱磷工艺开展脱磷试验,并根据生产条件和转炉工艺特点考察转炉脱磷专用氧枪的实际使用效果。试验中,转炉工艺冶炼前期低温脱磷,后期脱碳升温,吹炼前期采用低供氧强度脱磷喷枪,倒渣时切换为常规吹炼喷枪。在吹炼脱磷前期结束扒渣后,熔池中的w([P])下降至0040%以下,脱磷率为47.9%。在试验终点钢水中的w([P])均在0.010%以下,波动范围在0.006%~0.010%,w([P])的平均值是0.0081%。终点脱磷率波动范围是84.4%~92%,平均值是88.3%。 相似文献
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在复吹转炉铁水消耗1 050 kg/t(钢),铁水磷质量分数小于0.150%条件下,采用单渣法高拉碳工艺进行试验研究,实现了出钢碳质量分数大于0.40%,磷质量分数小于 0.020%。分析了高拉碳的操作控制难点是脱磷效率低、易喷溅和终点拉碳时机难以精确掌握。为此,对转炉操作抢位、氧压、底吹流量以及终点控制等方面进行了调整试验,试验结果表明:高枪位配合合适的底吹压力在提高脱磷效率的同时能有效控制喷溅;建立高碳出钢终点判断模型,能将碳命中率提高到90%以上。该工艺实施后,转炉终点游离氧保持在约100×10-6。 相似文献
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A study on the production of low phosphorus steel by double slag operation in 210 t converter was carried out. A phosphorus content of less than 0.005% (mass percent) was obtained before tapping. About 80% phosphorus could be removed by the first slag after 5 min. High Fe3+ content and high basicity in the first slag were in favor of dephosphorization. On the other hand, Fe3+ content had less effect on dephosphorization during second slag treatment. In the second slag period, the fraction of dephosphorization increased with the increase of basicity up to a basicity of 6. Further increase of basicity of the second slag had very little effect on dephosphorization. The tapping temperature had great impact on dephosphorization. It was impossible to get phosphorus less that 0. 005% when the tapping temperature was higher than 1 943 K. The optimum operation conditions were suggested. On the basis of these conditions, the amount of the second slag and the effect of the remaining first slag were estimated. 相似文献