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转炉溅渣层的物相结构及耐侵蚀性与调整后的转炉终渣成分有关,它的蚀锅主要发生在转炉冶炼中后期,其原因是转炉中后期炉渣的化学侵蚀和溅渣层在高温下的熔化。 相似文献
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本文介绍建邦集团溅渣护炉技术的改进与应用。通过调整终渣成分和碱度,对转炉的大面部位用铁块进行填补,冷却凝固后再进行溅渣,从而有效地提高了转炉产能和作业率,降低了耐材成本,提高了转炉炉龄。 相似文献
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通过转炉磁选钢渣尾渣在鞍钢烧结生产中的实际应用,研究了使用转炉磁选钢渣尾渣进行烧结生产的可行性,为鞍钢三废资源的综合利用开辟了新路。 相似文献
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随着超低碳、超低磷钢种冶炼的增多,济钢复吹转炉终点氧含量大幅提高,严重侵蚀了转炉炉衬。从高氧化性炉渣对炉衬的侵蚀机理入手,提出了兼顾溅渣层和炉底的溅渣工艺,介绍了超低碳、超低磷钢溅渣护炉工艺参数的优化及取得的效果。 相似文献
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针对100t转炉用含钛铁水冶炼高碳钢的前期成渣难于熔化、脱磷率低的问题,分析了含钛铁水转炉炼钢的成渣过程和炉渣的物理特性,开发了留渣+单渣工艺技术。循环利用终点炉渣,充分发挥渣中10%~13%FeO高(FeO)含量的特点,快速把含钛铁水冶炼前期的CaO-TiO2-SiO2三元渣系转变为CaO-TiO2-SiO2-FeO四元渣系,脱除钢中大部分磷。控制终渣碱度大于3.2、(TiO2)含量小于5%,使转炉出钢[C]≥0.20%、[P]≤0.014%,转炉炼钢脱磷率达到88%~92%,石灰消耗下降到28 kg/t钢。 相似文献
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Variation of Non-Metallic Inclusions Composition in X80 Pipeline Steel Refined by High Basicity Slag
《钢铁研究学报(英文版)》2011,(Z1):563-566
The transformation of inclusions was studied when control technology of refining top slag in ladle furnace was used in X80 pipeline steelmaking.Sufficient amount of aluminum was added to experimental heats for final deoxidation during BOF tapping,and then the refining top slag with high basicity and strong reducibility was adopted to transform Al 2 O 3 to inclusions with low melting point.The results show that the composition of inclusions changes in order of "Al 2 O 3 → MgO-Al 2 O 3 system→ CaO-MgO-Al 2 O 3 system→ CaO-Al 2 O 3 system".And the inclusions after LF refining are liquid or semi-liquid state at the temperature of steelmaking,which are easily removable to obtain high cleanliness steel by collision,agglomeration and flotation. 相似文献
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为了降低炼钢全流程钢铁料消耗,结合西昌钢钒炼钢厂装备及工艺条件,在提钒工序提出低硅质量分数铁水采用石英砂调渣、优化供氧制度等工艺改进措施以降低钒渣TFe的质量分数;在脱硫工序提出优化脱硫剂w(CaO)/w(Mg)质量分数比以减少脱硫渣量及喷溅;在转炉炼钢工序提出优化转炉终点温度和终点碳质量分数以降低转炉渣TFe质量分数。通过工艺改进措施的实施,钒渣TFe质量分数由28.59%下降到26.72%,脱硫铁损的质量分数由2.94%下降到2.63%,转炉渣TFe的质量分数由20.09%下降到19.00%。炼钢全流程钢铁料消耗由2015年12月的1 112.73降低到2016年4月的1 107.55kg/t,达到国内同类型企业中的先进水平,取得了巨大的经济效益。 相似文献
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通过对150t转炉3000炉次冶炼数据的分析,得出炉渣中FeO 10%~17%,炉渣熔点1450℃以下,粘度1.0~1.2P时转炉炉渣氧化性IOS和炉渣光学碱度Λx对渣-钢磷分配比Lp的影响。为提高炉渣的脱磷能力,在转炉冶炼模型中动态设定石灰加入量,促使终渣光学碱度接近目标范围Λx=0.74±0.01,渣组成接近于2CaO·SiO2相;当前冶炼模型中优先选择铁水还原性指数RIi目标为5.8~6.6,吹氧指数OMI设置目标1.05~1.20,优化炉渣氧化性指数IOS在10~15,能减少钢铁料损失和保证炉渣良好的脱磷效果。 相似文献
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A slag layer is formed when slag is splashed onto refractory lining in BOF slag splashing process. The melting temperature of the slag layer and the adhesion of the slag layer to the lining refractory have an important effect on slag splashing and BOF lining life. This study investigates the adhesive behaviour of slag with different composition to lining refractories. It is shown that the slag can adhere to MgO particles in MgO‐C bricks well and no reaction is found between the MgO particles and the slag layer, but a gas gap exists at the interface between the slag layer and the MgO‐C matrix and there are iron granules within the slag layer, when the FeO content in the slag is high. The adhesion of the slag layer to the lining refractory can be improved with decreasing FeO content in the slag and lower carbon content in the MgO‐C bricks. BOF refractory lining life can be greatly increased due to better adhesion, high melting temperature, and stronger wear‐resistance of the slag layer. 相似文献