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转炉溅渣护炉技术的工艺参数优化 总被引:1,自引:0,他引:1
高泽平 《金属材料与冶金工程》2002,(5):31-34
着重对溅渣护炉技术的工艺参数优化过程进行了探讨,确立了溅渣调渣原则,对转炉留渣量、出钢温度、氮气压力和流量,溅渣枪位与时间、溅渣率等工艺参数的控制进行了分析,指出了湘钢条件下的溅渣工艺参数的适宜范围。 相似文献
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一般的保护渣已不再适合于浇注高合金钢,而需开发一种新型的保护渣-高碱性高玻璃化连铸保护渣可适用高合金钢及薄板坯连铸的需要。本文简介了现用保护渣及双高保护渣的特点,论述了双高保护渣的生成机理,及配制双高保护渣的原则、用途,并列出了双高保护渣的例子。 相似文献
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介绍了湿法炼锌工业挥发窑窑渣的产生过程,分析了窑渣的物理化学性质,论述了窑渣堆积的危害,讨论了窑渣处理的工艺方案。开发的窑渣资源化综合循环利用新工艺,很好地解决了渣山治理的问题,获得了很好的经济效益、环境效益和社会效益。 相似文献
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镁系脱硫剂与硫的亲和力强,脱硫效率高,是铁水预处理脱硫过程常用的脱硫剂之一,但脱硫后的渣具有渣稀、不易扒渣等特点。为了改善脱硫渣的流动性、增加界面的粘接力、降低扒渣铁损,研究了脱硫渣改性剂碱度和添加量对脱硫渣黏度的影响。首先采用FactSage热力学软件对不同碱度和FeO加入量的脱硫渣黏度进行了模拟计算,分析了碱度和FeO加入量对脱硫渣黏度的影响。然后通过绘制CaO-SiO2-Al2O3-MgO(10%)-FeO(11%)脱硫渣的等温液相线图,找到了脱硫渣扒渣难的原因。利用熔渣综合物性测定仪测定了加入脱硫渣改性剂前后熔渣的黏度。结果表明:未加入脱硫渣改性剂之前脱硫渣的黏度均偏低,达不到合适的扒渣黏度;加入脱硫渣改性剂后可以增大脱硫渣的黏度,适宜的脱硫渣改性剂添加量为脱硫渣改性剂与脱硫渣配比为2∶5、3∶5,此时在扒渣温度区间1 330~1 340℃,脱硫渣黏度在2.007~2.114、2.5~2.77 Pa·s,有利于脱硫渣的粘结。 相似文献
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把握弯月面处液体保护渣随结晶器振动的周期性流入机理与控制要素,是稳定和提高连铸坯表面质量的前提。考虑弯月面区域钢液-保护渣-空气三相的几何、接触和运动特性,建立了耦合钢液传热、坯壳凝固与液渣流动的数学模型,预测结果与实际测量以及相关报道吻合,模拟分析了液渣的周期性流动和流入行为。围绕影响保护渣流入和消耗的主要因素,重点研究了液渣流入的周期性行为,探讨了一个振动周期内液渣的流入量、流入速度与渣道宽度的变化特点。通过界定和解析弯月面附近不同区域液渣流入的贡献和规律特征,对主导液渣流入的影响因素和作用机制进行了分析。结果表明,在一个振动周期内,保护渣向渣道的流入过程分为2个阶段和2种过渡状态。在第一阶段,流入的液渣主要由靠近弯月面钢液顶部的区域提供;在第二阶段,流入的液渣基本由靠近渣圈的区域提供;处于过渡状态,2个区域液渣流入渣道的量是此消彼长的过程。在弯月面区域,水平方向速度是制约液渣流入渣道入口或远离渣道入口的主要因素,垂直方向速度是影响液渣流入区域与瞬态流入量的关键,并且瞬态流入量受矢量速度分量与渣道宽度共同的影响。在此模拟条件下,液渣在整个振动周期均流入,流入量峰值为正滑脱中期,流入... 相似文献
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武钢三炼钢连铸低碳钢用结晶器保护渣的研制 总被引:1,自引:0,他引:1
介绍用于武钢三炼钢厂板坯连铸低碳钢器保护渣的研制过程,包括实验室保护渣配方的确定,保护渣造粒,以及现场试验。叙述了保护渣使用情况,应用效果,分析了保护渣使用前后的性能变化。 相似文献
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本文总结了复合保护渣的研制与应用情况,提出了复合保护渣的配方,并对复合保护渣与原保护渣加发热剂的应用情况进行了比较,认为复合保护渣具有更多的优越性。 相似文献
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Life Cycle Assessment of Internal Recycling Options of Steel Slag in Chinese Iron and Steel Industry 总被引:1,自引:0,他引:1
The internal recycling process of BOF slag which is one of the huge solid wastes from iron and steel industry was emphasized. Based on the four scenarios of different internal recycling strategies for BOF slag, life cycle assessment (LCA) as a valuable tool for industrial solid waste management was applied to analyze the contribution to reducing environmental impacts and resources burdens for each scenario. The global warming potential (GWP) results of the four scenarios show that the scenario which performs best in carbon reduction cuts off 14.2% of GWP impacts of the worst scenario. The results of this study show that the optimized internal recycling process of BOF slag can improve the environmental performance of crude steel. It is important to assess and choose an appropriate strategy to recycle BOF slag from LCA perspective to reduce the environmental impacts and resource burdens as much as possible. 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
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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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WU Wei MENG Hua-dong LIU Liu YUAN Tian-xiang BAI Yan-jiang YAN Zhan-hui 《钢铁研究学报(英文版)》2012,19(7):20-25
The slag melting characteristic of slag forming and slag splashing for 300 t BOF less slag process is researched by combining the methods of the slag chemical composition, the melting point determination and the petrographic analysis. The results show that the melting point of final slag for less slag smelting is 20 ℃ lower than that for conventional smelting. According to results of the petrographic analysis, the C3S (3CaO·SiO2) and C2S (2CaO·SiO2) content for less slag smelting are lower than those for conventional smelting, while the RO (FeO, MgO, MnO, etc) phase and C4AF (4CaO·Al2O3·Fe2O3) phase are higher than those for conventional smelting. According to results of the chemical analysis, the (CaO) content and slag basicity for less slag smelting are higher than those for conventional smelting, while (FeO) and (MgO) content in slag for less slag smelting are almost equal to those for conventional smelting. The reason why slag melting point for less slag smelting is lower than that for conventional smelting is that the quantity of added fluorite for less slag smelting is more than that for conventional smelting. According to the analysis results the slag melting point is determined by the C3S, C2S, RO phase and C4AF content. According to the results of slag melting characteristic before and after slag splashing for less slag smelting, the present adjusting slag process has little effect. It is important to adjust the composition of BOF final slag. The (FeO) content in slag is to be reduced at the slag splashing and adjusting slag process for less slag smelting. 相似文献
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