共查询到20条相似文献,搜索用时 140 毫秒
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论述了钢的洁净度对钢材性能的影响,介绍了洁净钢生产中S、P、N、O和非金属夹杂物的控制技术,分析总结了洁净钢生产的新技术,并展望了洁净钢生产技术的发展前景。 相似文献
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首先从高品质钢的洁净化、精准化、均质化和细晶化四个方面引申出了钢中非金属夹杂物的问题,阐述了"非金属夹杂物不是钢的所有问题,但所有钢都有非金属夹杂物的问题"、"非金属夹杂物是钢的天然成分,可以通过研究非金属夹杂物的生成机理来确定其控制方略,进而改善钢的质量"等重要观点。讨论了总氧含量(T.O)作为钢洁净度指数的不足之处,进而提出了钢的洁净度指数(I_c=xT.O+y(Al_2O_3)),即对于铝脱氧钢,式中y为零,夹杂物的控制主要强调钢中T.O含量要低;对于硅锰脱氧钢,式中x为零,夹杂物的控制主要强调夹杂物中的Al_2O_3含量要低。基于此洁净度指数,总结了多种钢的洁净度和非金属夹杂物的控制目标。文中还讨论了稳态浇铸与非稳态浇铸对钢洁净度的影响,提出了钢水洁净度水平最好的情况是非稳态持续时间短,且钢中非金属夹杂物控制水平好。最后讨论了钢中非金属夹杂物数量和个数表征的几个经典问题,包括如何计算夹杂物的平均含量和平均尺寸、夹杂物尺寸组的大小和数量的关系、如何把二维的夹杂物尺寸分布结果转化为三维的结果。 相似文献
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介绍八钢电炉在生产洁净钢方面的部分实践 ,阐述了整个工艺过程中控制 P、S、O、N等杂质元素及非金属夹杂物的一些措施。 相似文献
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洁净钢生产工艺研究 总被引:2,自引:0,他引:2
1 前言舞阳钢铁公司是我国第一家宽厚板生产企业 ,经过三十年的建设和技术改造 ,目前已形成电炉→ LF精炼→ ( VD真空处理 )→连铸 (模铸 )→轧制→ (热处理 )这一先进水平的短流程生产线 ,具备了年产 70万 t钢、60万 t板的生产能力。近年来 ,用户对钢板质量要求不断提高 ,对钢中 P、S含量及气体 ( N、H、O)、夹杂物的限制越来越严 ,提出了洁净钢的概念。所谓洁净钢 ,是指对钢中非金属夹杂物 (主要是氧化物、硫化物 )进行严格控制的钢种。主要包括 :钢中总氧含量低 ,非金属夹杂物少、尺寸小、分布均匀、脆性夹杂物少以及合适的夹杂物形… 相似文献
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关于高效率、低成本洁净钢平台的讨论——21世纪钢铁工业关键技术之一 总被引:1,自引:0,他引:1
高效率、低成本洁净钢平台建设仍是今后几年钢厂科技创新中一项具有普适性、基础性、事关钢厂效率、质量、成本的共性关键技术,对提高企业市场竞争力具有重要意义。洁净钢平台建设需抓好铁水预处理、转炉冶炼、二次冶金、全连铸4项基础支撑型技术和优化-简捷的流程网络和动态-有序运行的物流技术这2项集成技术。当前中国洁净钢平台建设的重点是:认清协同-稳定是洁净钢平台动态运行的核心,高效恒速的连铸生产是洁净钢平台动态运行的有序之源,也是优质、节能、低成本的关键;深入进行各种铁水预处理工艺、装备的适用性研究及技术经济比较;深入研究和优化规范适用范围广、运行效率高、易于协同、成本低廉的钢水吹氩精炼工艺;大力推进真空精炼装备和技术(尤其是高效RH)优化;在炼钢厂新建或改造的设计过程中要高度重视平面布置图(流程网络)的合理化,为稳定、经济地生产高质量钢材打好基础。 相似文献
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不断提高清洁生产水平是中国钢铁工业实现可持续发展的核心,中国钢铁生产量跃居世界首位的6年中,清洁生产 的水平不断提高。并继续成为结构优化的重点。钢铁工业清洁生产中,产品设计,原材料准备。产品制造,排放物处理和产品使用,再使用与回收这5个环节是不可分割的,更相互促进,互为依托。今后5-10年中国钢铁工业清洁生产将全面在钢铁的主流层和相关行业得到全面优化发展。 相似文献
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Iñigo Ruiz‐Bustinza Inmaculada Cañadas Jose Rodríguez Javier Mochón Luis Felipe Verdeja Fernando Garcia‐Carcedo Alfonso J. Vázquez 《国际钢铁研究》2013,84(3):207-217
In order to achieve a balanced development in the application of materials for structural or functional purposes, one of the priority objectives of future work is to achieve the goal of “zero waste” in the different production lines. As would be expected from what was agreed in the Kyoto Protocol and the meetings of Copenhagen 2009 and Cancun 2010, the production of clean energy will be strongly encouraged in the future, and indeed that is already the case now. Taking that into consideration, while the promotion of clean energy production is mainly directed toward electricity, solar thermal is quite interesting because of its direct application to metal mining and the chemical processes used in the sustainable development of materials. The combination of both objectives, “zero waste” and “clean energy,” may pose an interesting challenge in the development of primary iron and steel, as well as in other areas of metal production and even in the field of mining. The help of solar thermal energy, which can be concentrated to reach high temperatures, is a tool that could support both the direct production and the recycling of waste steel, in particular waste which is physically and chemically the worst for the environment. This would mean that the environment itself, solar energy, is in fact the key to environmental protection. 相似文献
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如何建立高效低成本洁净钢平台 总被引:6,自引:1,他引:5
本文根据洁净钢的定义,阐明了建立洁净钢制造平台的重要意义,分析对比以铁水“三脱”预处理为基础的洁净钢生产新流程和以炉外精炼为主体的传统流程的技术指标。讨论了传统洁净钢流程中存在的炼钢回硫、低碳脱磷、脱氧与夹杂物控制和强还原精炼等四项基本矛盾,并讨论其对洁净钢生产成本和能耗的影响。在此基础上提出建立高效低成本洁净钢平台应重点研究解决全量铁水“三脱”预处理、少渣冶炼、高碳出钢和真空碳脱氧以及改变夹杂物上浮方式等四项关键技术。 相似文献
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《钢铁研究学报(英文版)》2011,(Z2):36-41
The development of clean steel technology at Baosteel can be dated back to the first production of IF steels and pipeline steels in the early 1990s.Now the technology has gradually covered nearly the whole range of products.This progressive development is introduced in the overview including the levels of cleanliness for some steel grades at Baosteel.The technologies at different processes for the production of clean steel and the removal of some impurity elements in molten steel are also discussed.Suggestions are given on the future research and development of clean steel technology at Baosteel in the aim to keep a sustainable development,which should focus on the basic research,inclusion control and making efficient use of inclusions,as well as stable and reliable low-cost manufacturing technology,removal of harmful residual elements,and the expanding of the technology to stainless steels and special steels. 相似文献
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The mechanism of inclusion removal by attachment to rising bubble was analyzed, and the movement behavior of inclusion, the mechanism of bubbles/inclusion interaction, collision probability and adhesion probability were discussed. A mathematical model of inclusion removal from molten steel by attachment to fine bubble was developed. The results of theoretical analysis and mathematical model showed that the optimum bubble diameter for inclusion removal is 1 to 2mm. A new method that argon is injected into the shroud from ladle to tundish during continuous casting has been proposed to produce fine bubble. It provides theoretical guides for production of super clean steel. 相似文献
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