共查询到19条相似文献,搜索用时 390 毫秒
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本文讨论了LF炉添加脱硫剂进行脱硫的机理、脱硫剂的渣系选择及组成,并结合生产情况,着重介绍了LF炉添加脱硫剂的应用技术和效果. 相似文献
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叙述了常用铁水脱硫剂的反应及其特点,比较了其脱硫能力;分析了使用不同铁水脱硫剂时影响其反应速度的动力学因素;和添加各类促进剂的作用;提出了提高铁水脱硫效率的措施。籍供铁水炉外喷吹脱硫厂家参考。 相似文献
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承钢独特的资源特点决定了铁水硫含量高,特殊的炼钢工艺造成渣系单一、化渣困难,转炉脱硫效率低,为保证大断面铸坯质量,须提高LF炉的脱硫效率。通过对LF炉脱硫效率影响因素的分析,在原操作基础上制定并试验了两种不同的脱硫方案。实践证明:提高LF炉的脱硫效率,关键在于提高渣中CaO的活度、降低炉渣氧化性等。 相似文献
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在生产含硫低于0.008%的铁水时,改变炉外脱硫操作,使脱硫成本降低50%。改进的措施包括:优选脱硫剂种类、降低铁水热损失提高处理温度,降低喷吹速率,改进脱硫剂的加入量标准,提高脱硫后铁水含硫量与目标含硫量的吻合程度。 相似文献
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基于某厂现用的CaO-CaF2体系脱硫剂目前存在的侵蚀和保存不良问题,采用了铝酸钙脱硫工艺,并进行了工业试验,利用试验数据对深脱硫的可能性进行了进一步的探讨.根据对脱硫剂的渣-钢间硫分配比、熔化速度和RH炉真空室残渣的影响分析,铝酸钙脱硫剂的Al2 O3设计为33 %~37%;铝酸钙体系RH炉脱硫剂的最佳粒度范围为3~5 mm.工业试验表明,脱硫效果与脱硫剂加入量和初始硫含量呈线性关系.通过回归分析,当钢液中初始硫质量分数低于30×10-6时,深脱硫的成功率是比较高的,但当初始硫质量分数高于30×10-6时,深脱硫的成功率很低,即便大幅度增加脱硫剂加入量也效果不佳.铝酸钙体系脱硫剂相对于CaO-CaF2体系脱硫剂,合金收得率有所提高. 相似文献
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Abstract: CaO-Al2O3-SiO2-CaF2-MgO was selected as the slag system for desulfurization in LF process. The reaction between steel and slag during desulfurization has been simulated by using Factsage software to study the influence of component on the sulfur distribution ratio. In order to research the influence of CaO content, aluminum powder content and its granularity on desulfurization, laboratory experiments have been carried out in a 200 kg inductive furnace. Results showed that the optimal composition of deep desulfurizer is wCaO=64% and aluminium powder 10% with a granularity of 30 μm. Industrial trials showed that the main composition range of final slag in LF process is wCaO=530%-570%, wAl2O3=234%-251%, wSiO2=81%-100%, and wCaF2=32%-47%. The sulfur mass percent in steel is lower than 00008% with a desulfurization rate above 89%. According to the result of industrial production, this desulfurizer could meet the production requirement for ultra-low sulfur steel, of which sulfur mass percent is under 00015%. 相似文献
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简述镁用于铁水脱硫的机理和镁脱硫剂的种类,分析镁用于铁水脱硫相关研究工作进展,指出采用镁脱硫剂有利于发展优质钢材,提高企业的竞争力。 相似文献
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Ce-doped nanosized ZnO desulfurizer was prepared by homogeneous precipitation,and its desulfurization efficiency at ambient temperature was investigated through dynamic experiments.The results showed that the desulfurization activity of nanosized Ce-ZnO had improved greatly,compared to nanosized ZnO desulfurizer.Nanosized Ce-ZnO desulfurizer was characterized by XRD,TPD-MS,XPS,and TEM.The research results indicated that doping Ce decreased the particle size of the nanosized ZnO desulfurizer and ZnS was the principal desulfurization product.There were adsorption complexes of HS and S on the surface of desulfurizer as well.Only a small amount of vapor appeared in the tail gas on the condition of meeting the precision of desulfurization. 相似文献
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研究了还原剂云南煤和脱硫剂SH对硫酸渣在直接还原焙烧过程中提铁降硫效果的影响.采用X射线衍射与扫描电镜方法分析了云南煤与脱硫剂SH的作用机理.结果表明:在高温还原气氛下,硫酸渣中的黄铁矿生成具有挥发性的气态单质硫和气态羰基硫、金属铁和非磁性的陨硫铁;硫酸渣中的赤铁矿和磁铁矿则被还原为金属铁;云南煤对硫酸渣在焙烧过程中的脱硫效果比较明显,但无法达到要求的指标;添加脱硫剂SH可以进一步降低还原铁中的硫,其机理是脱硫剂与硫酸渣中的黄铁矿在直接还原焙烧过程中反应生成金属铁和没有磁性的硫化钙,通过磨矿-磁选的方法将硫化钙与金属铁分离,从而达到脱硫目标. 相似文献
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以钢厂现场使用的一种石灰系复合脱硫剂为研究对象,采用X射线衍射定量分析的内标法、添加标样法和K值法分别对脱硫剂中CaF2含量进行了测定,同时利用热重分析法对脱硫剂中CaCO3和Ca(OH)2含量进行了定量分析,进而求得CaO含量。分析结果表明:这种多设备联用的物理检测手段能从物相上对脱硫剂的组成进行全面的定性和定量分析,准确度可靠,具有较强的实用性,能有效弥补化学分析方法在物相检测方面的不足,对脱硫剂的改性研究和完善脱硫剂等原辅材料的检测方法有一定参考价值。 相似文献
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A kinetic model for the Ruhrstahl–Heraeus (RH) desulfurization process is established based on the FactSage Macro Processing. The desulfurizer addition, the desulfurization reaction, the steel mixing, the flow circulation, and the desulfurizer floating during the RH refining process are considered in the model. Simulated results agree well measured results, indicating that the current model can be used to predict the desulfurization reactions during the RH refining process. The CaO activity increases with a higher CaO/Al2O3 ratio and a lower SiO2 content, which exhibits a similar tendency with the desulfurization ratio. It is indicated that it is necessary to increase the CaO activity in the desulfurizer to improve the desulfurization ratio. The S content in the molten steel decreases with time and a higher ratio of the powder blowing. The cost increases with time due to the refractory erosion and the steam consumption. The cost of the desulfurizer added by the powder blowing is lower than that of the gravity sinking. 相似文献