论纯净钢及其生产技术

详细介绍了纯净钢的生产技术:去碳、去硫、去磷、去氮、去氢、去氧及夹杂物的控制,最后阐述我国纯净钢的生产现状及趋势.     

攀钢洁净钢生产实践

简要介绍了攀钢炼钢厂的装备及工艺技术水平,叙述了攀钢近年来为实现洁净钢生产,在铁水预处理、转炉冶炼、钢水精炼(脱硫、脱氧、脱磷及夹杂物控制)等方面所作的改进,以及在350 km/h高速铁路用钢、抗H2S腐蚀石油管坯钢等典型钢种上的应用,实现了wT[0]≤0.001 5％,w[S]≤0.005％,w[P]≤0.010％,...     

超低硫X65QS管线钢硫含量控制的生产实践

介绍了永钢采用110 t电炉→LF精炼→VD精炼→连铸工艺生产超低硫X65QS管线钢硫含量控制的生产实践。各工序硫含量得到严格控制,电炉平均脱硫率16.35%。出钢过程用铝1 kg/t脱氧,同时随钢流加入石灰6 kg/t和精炼合成渣2 kg/t。LF炉采用喂铝线、复合碳化硅和铝豆对渣面扩散脱氧,造高碱度白渣对钢水深脱氧、脱硫,LF炉平均脱硫率89.2%,精炼结束后钢水平均硫含量0.000 93%。LF精炼结束到连铸工序过程平均增硫0.000 1%,最终成品硫含量平均0.000 9%。通过控制入炉料硫含量,提高LF精炼炉深脱硫能力,防止精炼后回硫等措施,生产的超低硫X65QS大圆坯硫含量符合下游客户要求,具备批量生产成品硫含量在0.002%以下的超低硫钢的能力。     

洁净钢生产技术初探

主要论述钢的洁净度与其性能之间的关系,以及近年来国内外主要钢厂生产洁净钢控制钢中杂质元素[C、S、P、N、H、O]技术的进展,为鞍钢纯净钢的生产提供有益的借鉴.     

莱钢低硫钢冶炼过程硫含量控制实践

结合莱钢J55、L360等低硫钢冶炼的生产实践,分析了铁水预脱硫处理—转炉—LF钢包精炼—连铸全流程各工艺环节的硫含量控制技术,指出铁水预脱硫处理、转炉冶炼、LF精炼过程硫含量控制技术是低硫钢冶炼的关键技术环节。通过采用全流程硫含量控制技术,生产出了硫的质量分数最低为0.002%的低硫钢。     

莱钢洁净钢生产技术进步

介绍了莱钢洁净钢的生产工艺：脱碳、脱硫、脱磷、脱氮、脱氢、脱氧及夹杂物的控制,莱钢充分利用RH与LF精炼技术提升产品质量,成功开发了低碳洁净钢,将S、P、N、O、H5元素质量分数总和控制在100×10-6以下。     

Low-Cost and Large-Scale Clean Steel Production Technology

As the market demand for clean steel increased,a number of new technologies for clean steel production have been developed in some domestic and foreign steelmaking plants.Based on the existing equipments and technical conditions in the No.1 steelmaking plant of Ansteel,a series of clean steel technologies have been integrated including single bay duplex-dephosphorization in steelmaking control technology,high efficiency desulfurization technology,the control technology for nitrogen content during the whole process,the control technology for hydrogen content in VD,and the systematic control technology for oxygen content.A series of process for all kinds of ultra-low phosphorus,ultra-low sulfur and relative low level of inclusions have been designed in clean steel production.This process include hot metal desulfurization and slag-off,single bay duplex-dephosphorization in BOF,molten steel slag-off,LF processing,VD processing,and continuous casting with protection,then a stable,low-cost and large-scale production process has been formed.Applying this integrative technology,the sum of 5 major elements including phosphorus,sulfur,oxygen,nitrogen,hydrogen is less than 80×10-6 in high alloy steel scale production,and the industrial applications for clean steel technology have been achieved.     

洁净钢生产的研究现状及发展前景

本文介绍了洁净钢主要的生产技术以及洁净钢传统工艺流程和新工艺流程的对比。并综合国内外文献,分析了洁净钢生产的发展前景。     

Overview:Development of Clean Steel Production at Baosteel

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.     

钢的洁净度控制及生产新技术

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。     

重轨钢的洁净度控制技术

通过采用无铝脱氧工艺,即合适的终脱氧剂和精炼造渣工艺降低钢水氧活度和全氧含量,采用VD真空强化脱气工艺降低钢中氢、氮含量,采用优质耐火材料并严格工艺操作防止大型夹杂物的带入,采用全程保护浇注和中间包冶金技术防止钢水二次氧化和促使钢中夹杂物上浮排除;生产出了w[Al]≤0.004%,w[O]T≤0.002 0%,w[H]≤0.00015%,非金属夹杂物类别中A级不高于2.5级,B、C、D级不高于1.5级的高速铁路用钢.     

Process Analysis and Practice of Clean IF Steel Production

Based on the current process and equipment conditions of No.3 steelmaking and continuous rolling plant, which consists of desulphurization and slag skimming of hot metal, 260t combined blown BOF, rimmed steel tapping with slag stopping process, RH-TB vacuum treatment process and medium thin slab continuous casting, the methods for improving cleanliness of IF steel in BOF smelting, RH vacuum treatment and continuous casting were investigated. According to results of theoretical analysis and experiments, a series of quality controlling schemes were proposed for improving cleanliness of IF steel via controlling chemical composition, T[O] content, tapping temperature, shrouded casting and controlling stability of continuous casting.     

洁净钢新技术与高品质钢的生产

综述了国内外洁净钢技术的发展与新观点,在工业生产中的定义,生产过程中洁净度的控制,以及高品质钢对钢水洁净度的要求;提出了洁净钢经济洁净度控制与发展策略。     

鞍钢洁净钢生产平台分析

介绍了鞍钢洁净钢生产平台情况,包括设备状况、工艺流程、产品结构、生产能力及控制技术,鞍钢洁净钢生产控制能力实现C、P、S、H、N及全氧含量总和≤70×10^6巧,夹杂物尺寸小于20μm,个别钢种小于5μm。     

高洁净度钢轨钢的夹杂物控制技术

针对国内生产350 km/h高洁净度钢轨存在非金属夹杂物控制的核心问题,开展了相关研究.通过采用适宜的钢包底部吹氩模式和钢包渣组成,显著提高了钢中非金属夹杂物的去除率,T[O]去除率提高近40%;对硫化物夹杂的变性处理有效地控制了钢轨钢中夹杂组成和形态.这些技术在350 km/h高洁净度钢轨钢生产中的应用,不仅使钢轨的T[O]降到10.17×10-6,而且A类和B、C、D类非金属夹杂物评级分别≤2.0级和1.0级,实现了350km/h高洁净度钢轨钢的批量生产.     

国内外纯净钢生产技术的新进展

概述了国内外先进炼钢厂的纯净钢生产技术,讨论了铁水预处理、冶炼、精炼及连铸各工序控制钢中夹杂物C、S、P、N、H、T.O的主要技术措施,为纯净钢生产的工艺选择和成分控制提供参考。     

中国钢铁工业的清洁生产

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。     

适应现代优质钢材要求的铁资源及新工艺技术

概述了现代优质钢材对铁资源的要求以及为适应优质钢材和纯净钢要求而发展的钢铁生产新工艺、新技术。     

Reviews and Prospects of Clean Steel Production Practices in Ansteel

It summarizes the recognition of clean steel through the reviews the historical development and production practices of clean steel of Ansteel in this paper.The technological characteristic,equipment,controlling capability and new exploratory of clean steel production of Ansteel are introduced.It has also made a new appraisal to the production line of different clean steel from the angle of high efficiency,stabilization and low-cost.The prospects of new production technology of clean steel are introduced at the end of the paper.     

高碳纯净钢生产工艺的研究与实践

鞍钢股份有限公司第一炼钢厂试验研究了高碳纯净钢的冶炼操作技术,对纯净钢的工艺过程控制进行全面分析后,确定了高碳纯净钢的冶炼技术要点。将采用该工艺生产的高碳纯净钢与其他钢厂同类钢种进行对比,结果表明,该工艺提高了高碳钢的纯净度和性能指标。