共查询到20条相似文献,搜索用时 15 毫秒
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介绍了钢铁连铸用浸入式水口、中包水口、长水口及塞棒等功能耐火材料的发展现状,指出今后的研究重点应是通过复合抗冲刷性能优良且透气性能好的内衬料,解决快换中包水口内衬不抗冲刷、容易向内衬中渗钢水、吹氩效果不理想的问题,开发多功能、高性能和长寿命的连铸用耐火材料. 相似文献
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质量控制模型是连铸生产中一个非常重要的控制模型,模型运行的好坏会直接影响产品的质量.文章阐述了宝钢电炉连铸质量控制思想及其程序实现方法,并结合多年的实践经验,对该模型提出了一些优化思想和技术改进方法. 相似文献
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分析安钢矩形坯连铸工艺参数对铸坯内部质量的影响,提出相应的工艺改进对策,通过优化连铸工艺,使铸坯内部质量提高,获得好的冶金效果。 相似文献
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我国连铸中间包内衬耐火材料的发展及应用 总被引:1,自引:0,他引:1
介绍了我国连铸中间包内衬耐火材料的发展和使用状况。我国连铸中间包内衬耐火材料由黏土砖、高铝砖发展到硅质绝热板、镁质绝热板、碱性涂料和碱性干式振动料等,这些耐火材料用在不同类型的连铸中间包上,取得了良好的效果,满足了我国不同时期连铸生产的需要。 相似文献
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A 1∶2.5 scale tundish model was set up in laboratory for a six-strand billet continuous casting tundish with different configurations to investigate fluid flow characteristics under different operational conditions by measuring residence time distribution curves.It was found that minimum residence time,maximum concentration time and average residence time of the three strands on the same side of the tundish with the former configuration under normal operation,that is,six strands were open,were small and non-uniform and the tundish had large dead volume fraction.Vortexes easily formed on the liquid surface in the pouring zone of the tundish.The fluid flow characteristics in the tundish with the optimal turbulence inhibitor and baffles were improved and became less non-uniform among the strands.Vortexes were not found on the pouring zone surface in the optimal tundish.For non-normal operation,that is,one strand was close,it was important to choose which strand to be closed for maintaining flow characteristics of the rest two strands.It was found from this investigation that fluid flow characteristics in the optimal configuration tundish with closing strand 2 were better than those with closing strand 3 on the same side. 相似文献
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本文以酒钢炼轧厂重点品种钢82B为例,通过分析冶炼工序各关键质量控制环节,提出高碳钢的各项质量改进措施。 相似文献
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近年来中国不锈钢的产量及国内市场消费量均已达世界第一,2009年不锈钢产能为1 400万t,其中先进装备产能达到70%以上,产业集中度要高于其他钢铁产品,然而在精炼生产过程控制、产品质量方面,与国外仍有一定的差距.鉴于此,介绍了国内外不锈钢精炼的数学、物理及过程控制模型,讨论了不锈钢中非金属夹杂物的形成机制及其在精炼、... 相似文献
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介绍了国外几家公司接近产业化的薄带连铸技术的发展概况.根据国内外薄带连铸和薄板坯连铸的专利和生产实践,认为目前适合应用薄带连铸技术生产的碳钢为低碳硅锰镇静钢.也介绍了国外公司生产硅锰镇静钢的成分和性能.通过控制钢中的总氧含量,钢中可形成低熔点的夹杂物,并均匀地分布在铸带的厚度方向,从而有利于快速凝固过程中的高速传热.同时,还应该控制好钢中的碳、氮、氢含量,以获得表面质量良好的产品. 相似文献
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Accuratemouldlevelcontrolisveryimportantincontinuouscastingprocess(seeFig.1)anditisbelievedtobeakeyfactorinimprovingfinalproductquality.Althoughmanymethodshavebeendevelopedformouldlevelcontrol[1,2],theyarenotperfectbecauseonlypartofthefactorssuchasdisturbanceofcastingspeedandnonlinearityofthemouldlevelcontrolsystemareconsidered[3—5].Infact,theperformanceofthehydraulicservosystemofslidinggateanddeviationoftundishweightaretwomajorfactorsaffectingmouldlevelcontrol.Allthesetwoloopsshouldbeconside… 相似文献
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介绍了薄板坯连铸连轧工艺生产无取向硅钢和取向硅钢的工艺特征。重点比较了这一新工艺与传统工艺的不同点。指出了薄板坯连铸连轧工艺生产硅钢具有天然的优越性。 相似文献
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高拉速时连铸结晶器内钢液湍流场及其电磁控制研究 总被引:2,自引:0,他引:2
利用数学模型结合低熔点金属合金模型试验研究全幅二段恒稳磁场控制结晶器内气液两相流场和夹杂物粒子的运动轨迹。结果表明,水口喷吹氩气结合施加恒稳磁场的作用,同时达到控制结晶器内弯月面波动、获得活塞流和抑制后凝固区偏析的目的。氩气喷吹和磁场共同作用既能保持液面稳定又能避免凝结发生。吹入氩气能增加夹杂物的去除率。施加磁场时,夹杂物运动速度明显降低.夹杂物的富集率降低。 相似文献
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A conventional turbulence inhibitor is compared with a swirling chamber from the points of view of fluid flow and removal rate of inclusion in the tundish. Comparing the RTD curves, inclusion removals, and the stream-lines in water model experiments, it can be found that the tundish equipped with a swirling chamber has a great effect on improving the flow field, and the floatation rate of inclusion is higher than the tundish with a turbulence inhibitor. Because of the introduction of the swirling chamber, the flow field and inclusion removal in a two-strand swirling flow tundish are asymmetrical. Rotating the inlet direction of swirling chamber 60 degree is a good strategy to improve the asymmetrical flow field. 相似文献