共查询到20条相似文献,搜索用时 109 毫秒
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介绍了攀枝花钢城集团瑞钢工业有限公司以冶金渣二次资源渣钢、渣铁为原料,采用"EBT电炉+LF精炼+小方坯连铸"流程生产HRB400钢工艺实践。通过对EBT电炉、LF精炼、连铸工艺参数的合理控制,能够批量生产出符合GB1499.2—2007要求的HRB400钢,实现了二次资源的有效利用。 相似文献
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紫金铜业有限公司稀贵厂阳极泥处理采用酸浸氧化脱铜—奥图泰卡尔多炉粗炼—银电解精炼—金精炼工艺。设计年处理量2 000t铜阳极泥,白银年产量176t,黄金年产量4.8t。从银电解精炼工艺、设备应用等方面分析生产前期出现的问题,并通过工艺调整、设备优化改造两方面对银电解精炼作业进行优化,使银电解精炼稳定产出合格的银粉。 相似文献
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采用二次氯化—二次还原法进行了金精炼提纯工艺研究与实践。该工艺主要由粗金粉化、一次氯化浸金、一次还原金、二次氯化浸金、二次还原金、熔炼等环节组成。经实践表明,采用该工艺获得的金纯度可达到99.999%以上,且该工艺流程简单、设备合理、生产周期短。 相似文献
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介绍了国外转炉风水炉外精炼所取得的成就。由于转炉流程的原料不含对钢的性能有害的金属元素,而铁水预处理和炉外精炼技术的发展使民炉流程可以获得非金属杂质含量很低的纯净钢,因此今天经过转炉+炉外精炼流程生产的比电弧炉+炉外来炼流程生产的钢具有更好的使用性能。 相似文献
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《Baosteel Technical Research》2010,(Z1):79
Ultra pure ferritic stainless steel has more advantages in the performance than the ordinary ferritic stainless steel because of ultra low carbon and nitrogen content,such as corrosion resistance,toughness and weldability,etc.Such steel has therefore been applied in many fields,leading to the very rapid development over the past 40 years.This study focuses on the secondary refining process which is the most important step of the whole steelmaking process for the ultra pure ferritic stainless.Firstly,some difficulties of the secondary refining process are described,including the high purification in terms of both carbon and nitrogen contents, high efficient and stable control.Secondly,the development and progress of the secondary refining technology for ultra pure ferritic stainless is introduced in terms of the refining equipments,metallurgical process and assistant technologies.Finally,the prospect was made for the development of secondary refining process for ultra pure ferritic stainless in the future. 相似文献
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通过对HRBL600热轧左旋带肋钢筋新钢种的开发实践,对开发过程以及过程中出现的各类问题进行分析探讨,为公司即将开发的各种优质钢提供参考方案。 相似文献
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简要介绍了承钢150吨炼钢系统采用RH炉脱碳、LF炉脱硫的双联精炼工艺生产低碳钢的工艺研究及实践,通过对RH脱碳条件、LF脱硫影响因素的分析,指出了最佳的工艺条件和措施。 相似文献
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介绍了湘钢二炼钢厂采用复吹转炉冶炼45钢时,在造渣、供氧制度及枪位控制等方面的生产实践,说明了碳含量相当的情况下,采用复吹转炉冶炼45钢终点氧含量比顶吹转炉低, 相似文献
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《钢铁研究学报(英文版)》2011,(Z2):201-206
During secondary refining of molten steel, reaction of steel-slag has great influence on the quality of steel. Taking high aluminium steel ([Al]≥0.8%) for instance, reaction control of 4[Al]+3(SiO2) = 2(Al2O3)+3[Si] was discussed by both thermodynamics calculation and industrial experiments. The results show that content of silicon increased sharply when content of SiO2 in slag exceeded 10%. In order to prevent the increment of silicon content and reoxidation for high aluminium steel, reasonable component range of LF refining slag is: %CaO/%Al2O3=1.6-1.9, %SiO2 <10. Results of the industrial experiments indicate that the CaO-Al2O3 based refining slag has strong ability of desulfurization and inclusion absorption. Average desulfurization rate is 80%, and T[O] reduces above 50% after refining, with the average sulfur content and T[O] about 0.0025% and 11×10-6,respectively, which can meet the requirements of secondary refining and obtain good castability of steel in continuous casting process. 相似文献
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介绍了安钢易切削钢盘条AG1215的研制开发。通过合理的转炉终点控制、精炼工艺、增硫措施、制定关键连铸、加热、轧制工艺技术措施,获得表面及低倍质量优良的铸坯,夹杂物控制达到预期控制目标,盘条各项性能符合用户要求。 相似文献