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高炉铁沟内投撒料剂脱硅工艺研究 总被引:1,自引:0,他引:1
对铁水脱磷处理前的铁水预脱硅处理的必要性及在酒钢高炉出铁沟内进行的投撒预脱硅实验进行了分析。分析得出:在铁水包脱磷工艺中,铁水初始硅质量分数应低于0.20%;高炉投撒脱硅要求处理前铁水硅质量分数应低于0.40%。 相似文献
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1 前言 随着冶金技术的不断发展,铁水预脱硅工艺逐渐成为了铁水预处理中不可缺少的环节。因为铁水含硅量低是保证后步脱磷的重要条件,并且铁水含硅量低也有利于转炉冶炼实现少渣操作。而铁水预脱硅的控制需要及时测定铁水中的硅含量,由于传统的化学分析法满足不了快速测硅的要求,因此,直接、快速的定硅探头的开发研究受到了各国冶金工作者的重视。 相似文献
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高炉生产的炼钢铁水,在入转炉或电炉前,多经预脱硅、预脱硫和预脱磷处理,称铁水预处理。本文将简要介绍国外的铁水预脱硅工作,为我省乃至我国钢铁冶金技术改造提供参考。 相似文献
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对太钢4号高炉铁水炉前预脱硅的工艺进行分析,认为对现有工艺进行适当的优化,脱硅、消泡效率仍有提高的空间,同时,脱硅铁水增硫严重的问题可以得到解决. 相似文献
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对宝钢高炉炉前铁水预脱硅技术进行了总结分析。根据现场实际生产数据及操作经验,重点分析了影响脱硅效果和泡沫渣的诸多因素,并通过采取一系列改进措施,使高炉炉前脱硅取得了很大的进步,为炼钢冶炼低磷低硫精品钢提供了优质低硅铁水。 相似文献
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《钢铁研究学报(英文版)》2016,(2):98-102
The reaction of CO_2 gas with hot metal was investigated based on the thermodynamic analysis and experimental results.It shows that both silicon and carbon in hot metal can be oxidized by CO_2 gas in the temperature range of 1 300-1 500 ℃.When using graphite crucible,temperature has little influence on final mass percent of carbon w[C]because of the carburization effect.Decarburization degree rises significantly with increasing gas injection rate and w[C]can be reduced to 3.2% at most when using MgO crucible.Lower temperature or higher gas injection rate is propitious to promote desilication reaction,but only 5%-10% of desilication ratio could be obtained in 20 min.The final mass percent of silicon w[Si]when using MgO crucible is lower than that when using graphite crucible.Experimental results also demonstrate that CO_2 injection has no effect on the concentration of manganese,sulfur and phosphorus in hot metal.In view of the weak oxidation ability and temperature drop of hot metal,CO_2 gas is suggested to be used as carrier gas in desilication process rather than oxidizing agent. 相似文献
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为了满足生产超低磷钢的预脱磷要求,对不锈钢铁水脱磷工艺进行介绍。在45 t钢包中进行石灰喷粉+吹氧的工业试验,结果表明,在铁水脱硅期达到预期效果(铁水w([Si])≤0.1%)后,铁水脱磷期可实现平均脱磷率大于88%。根据试验数据,分别回归出脱硅期和脱磷期的脱磷率、磷分配比的计算公式。通过添加萤石能够获得较好的铁水脱磷效果,随着铁水硅含量变化,铁水温度、吨钢耗氧量、石灰消耗量、炉渣碱度的增加,铁水的脱磷率明显增加。炉渣w((TFe))的增加对铁水脱磷率的影响不显著。研究认为,目前采用的石灰喷粉+吹氧冶炼进行铁水脱磷处理是行之有效的不锈钢铁水脱磷方法。 相似文献
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为进一步提高转炉产能及产品质量,根据莱钢实际情况。提出了对750m^3高炉铁水实施全量脱硅和脱硫预处理的方案。脱硅采用炉前铁水沟熔池喷吹方式,脱硫采用铁水包喷吹方式。预处理后铁水中的硅和硫可分别控制在0.2%和0.02%以下。通过分析选定各技术参数,认为方案可行,预期年经济效益可达600万元。 相似文献
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The vacuum treatment for simultaneous desulphurization and dephosphorization of hot metal and molten steel with pre-melted CaO-based slag was carried out. For pre-treatment of hot metal, both desulphurization and dephosphorization are improved with the increase of CaO in slag, but deteriorated with the increase of CaF2 in slag. The average desulphurization and dephosphorization rate is 68.83% and 78.46 %, respectively. For molten steel, the sub-stitution of BaO for CaO in slag has minor effect on simultaneous desulphurization and dephosphorization. The desulphurization and dephosphorization rate is higher than 90 % and 50% respectively with the lowest final sulfur and phosphorus mass percent being 0. 001 2 % and 0. 010%, respectively. The overall effect of simultaneous desulphurization and dephosphorization of molten steel is better than that of hot metal. 相似文献