共查询到20条相似文献,搜索用时 93 毫秒
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目前炼钢厂普遍存在转炉与连铸机生产节奏不匹配的现象,需要进行攒包生产才能保证连铸机连浇,因此,提出科学合理的钢包攒包生产控制模型对炼钢厂进一步实现节能降耗意义重大。以C炼钢厂钢包为研究对象,解析其运行模式和运行时间,分析转炉与连铸机匹配模式;通过分析钢包攒包时间与连铸机浇注炉次数之间的关系,构建钢包攒包生产运行时间控制模型,计算出合理的钢包攒包时间、重包运行时间和周转周期;运用甘特图分析法研究攒包生产条件下的钢包周转规律,构建钢包周转数量控制模型。将模型运用于实际,可有效减少钢包攒包数和周转数,提高周转率并减少钢水温降。 相似文献
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京唐炼钢厂的定位是打造高效低成本洁净钢生产平台。高效、低成本与洁净钢这3个基本理念并非相互独立、互不相连,而是相互依存、共同发展。结合京唐炼钢厂实际情况,通过采用六西格玛的方法对京唐炼钢厂钢包周转周期进行改善。结果表明,通过压缩生产组织节奏,同时在转炉出毕至精炼环节取消部分钢种的炉后取样测温操作,可提高物流速度,钢包周转周期缩短了11.7min,其中转炉出毕至连铸开浇的时间从80降低至75min;在目前班产30炉、钢包周转周期为201.4min情况下,合适的钢包周转数量为13个;优化RH合金化过程,并严格控制钢包周转数量(不超过13个),转炉出毕至连铸开浇的时间从75降低至70min。 相似文献
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从钢包周转运行的各个阶段进行分析,通过理论计算与实践生产相结合,制定合理的生产工艺路径及钢包周转制度。结果表明:通过优化钢包的周转可以有效缩短钢包周转时间、降低转炉出钢温度及提高钢包的使用寿命。 相似文献
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新型保温材料在钢包隔热层上的应用研究 总被引:1,自引:0,他引:1
介绍了安钢第一炼轧厂在100t钢包采用新型纳米材料作为隔热层的工艺试验。生产实践表明,该新型钢包保温性能良好,能够减少钢包散热、降低精炼电耗、稳定中包钢水温度,这一生产应用取得了良好的工艺效果和经济效益。 相似文献
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André Zimmer lvaro Niedersberg Correia Lima Rafael Mello Trommer Saulo Roca Bragana Carlos Pérez Bergmann 《钢铁研究学报(英文版)》2008,15(3):11-0
The heat transfer in a steelmaking ladle was studied. The evaluation of heat transfer of the steel was performed by measuring steel temperature in points including all refining steel process. In the ladle, the temperatures in the refractories and the shell were also measured. To evaluate the thermal profile between the hot and cold faces of the ladle in the slag line position, an experiment which shows the importance of thermal contact resistance was carried out. Higher heat losses in the tapping and the vacuum were verified. The temperature measurements of the ladle indicate distinct thermal profiles in each stage of steel refining. Moreover, as each stage of the process depends on the previous one, the complexity of the ladle thermal control is incremental. So a complete model of heat losses in the ladle is complex. 相似文献
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The influence of calcium treatment on non-metallic inclusions had been studied when control technology of refining top slag in ladle furnace was used in ultra-low oxygen steelmaking. A sufficient amount aluminium was added to experimental heats for final deoxidizing during BOF tapping, and the refining top slag with strong reducibility, high basicity and high Al2O3 in ladle furnace was used to produce ultra-low oxygen steel and the transformation of non-metallic inclusions in molten steel was compared by calcium treatment and no calcium treatment. The results show that the transformation of Al2O3→MgO·Al2O3 spinel→CaO-MgO-Al2O3 complex inclusions has been completed for aluminum deoxidation products and calcium treatment to molten steel is unnecessary when using the control technology of ladle furnace refining top slag to produce ultra-low oxygen steel, and the complex inclusions are liquid at the temperature of steelmaking and easily removable to obtain very high cleanliness steel by flotation. Furthermore, the problems of nozzle clogging in casting operations do not happen and the remaining oxide inclusions in steel are the relatively lower melting point complex inclusions. 相似文献
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提高LF精炼钢包寿命的措施 总被引:1,自引:0,他引:1
精炼温度高造成渣线侵蚀严重以及炉渣对耐火材料的侵蚀,是影响精炼钢包寿命的主要原因。石横特钢厂采取稳定精炼初始温度;加强中间包烘烤;采用埋弧渣技术,制定合理的分钢种精炼温度等措施,使精炼钢包的平均使用寿命比48炉次提高到53炉次,耐火砖消耗降低了0.79kg/t钢。 相似文献
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研究了采用LF精炼顶渣控制技术对钢液进行超低氧冶炼时,钙处理对钢中非金属夹杂物的影响。试验在转炉出钢时采用铝终脱氧,LF精炼过程采用强脱氧、高碱度、强还原性精炼顶渣对钢液进行超低氧冶炼,比较了钙处理和不钙处理的钢液中非金属夹杂物转变的情况。结果表明,采用精炼顶渣控制技术冶炼超低氧钢时,钢液不需要进行钙处理就能实现铝脱氧产物Al2O3→MgO·Al2O3尖晶石→CaO-MgO-Al2O3类复合夹杂物的转变,得到炼钢温度下呈液态的复合氧化物夹杂,这些液态的夹杂物容易通过碰撞长大上浮去除,得到高洁净度的钢液,且残留在钢液的氧化物夹杂为较低熔点的复合氧化物,在浇注过程中不会产生水口结瘤。 相似文献
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抗酸管线钢API X65(/%:≤0.045C,0.15~0.35Si,1.50~1.65Mn,≤0.008P,≤0.001 2S,0.02~0.06Alt,0.45~0.65Nb,0.01~0.025Ti)由脱硫铁水-100 t顶底复吹转炉-LF-RH-板坯CC流程冶炼。分析了引流砂质量(石墨含量0.22%~0.86%),钢包钢水停留时间(<180~>270 min),LF精炼温度(<1620~1690℃)出钢口垂直度,钢包上水口寿命(2~28次)对自开率影响。结果表明,引流砂中石墨含量低,钢包钢水停留时间长,LF精炼温度高,出钢口和钢流偏移,钢包上水口使用次数少,则钢包自开率低。通过稳定相关工艺因素,控制引流砂中石墨含量≥0.8%,LF钢水停留时间180~240 min,LF终点温度≤1 640℃等工艺参数,使抗酸钢的钢包自开率由84.52%提高到97.47%。 相似文献