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针对邯钢棒材二车间加热炉炉底水管绝热包扎结构存在的问题和缺陷,提出了技术改造方案,并予以实施.从使用效果来看,本次技术改造是十分成功的. 相似文献
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步进梁式加热炉水冷梁柱浇注包扎施工是筑炉重点和难点。从浇注包扎施工的模具着手改进施工技术,以提高浇注包扎施工的质量,降低施工难度,并降低施工成本。 相似文献
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介绍了邯钢对加热炉炉底纵水管在绝热包扎后,经常出现鼓包断裂事故的分析,以及通过改进纵水管出汽端布置,解决了该问题的措施。 相似文献
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文章介绍了步进式加热炉炉底水管包扎料结构特点,针对炉底水管温度较高、温度梯度较大、承重运动、碰撞频繁导致包扎料容易受损的现状,提出强化薄弱环节、改进施工工艺、严格烘炉曲线、控制初期生产强度等应对措施,实践表明,解决了困扰多年的技术难题,取得明显的社会效益和经济效益. 相似文献
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针对邯钢棒材二车间加热炉炉底水管绝热包扎结构存在的问题和缺陷,提出了技术改造方案,并予以实施.从使用效果来看,本次技术改造是十分成功的. 相似文献
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主要阐述了不定形耐火材料城梁式加热炉炉体及步进梁,固定梁绝热包扎上的应用。重点介绍了为提高炉体使用寿命而采取的一些有效措施。 相似文献
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蓄热式加热炉换向燃烧时,煤气换向阀至烧嘴之间管道里残留的煤气直接被排入大气。为了能够降低蓄热式加热炉能源消耗、减少污染排放,对蓄热式加热炉换向过程开展探究。对唐山市某钢厂一座160 t/h蓄热式加热炉设计了蓄热式加热炉烟气反吹系统,通过科学的时序控制和安全联锁,与原蓄热式加热炉控制程序合理链接,实现整套系统安全可靠运行。蓄热式加热炉烟气反吹系统的投入应用,使加热炉单位能耗由原来的0.882降低至0.823 GJ/t,CO减排率达到94.9%,同时为燃烧控制及维修提供了数据依据。 相似文献
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By using a static and high-speed material testing machine,tensile deformation behaviors of two kinds of SiMn TRIP(transformation induced plasticity)steels and DP(dual phase)steel were studied in a large range of strain rates(0.001-2 000s-1).Temperature variation during adiabatic heating and the amount of retained austenite at fracture were measured by an infrared thermometer and an X-ray stress analyser,respectively.The microstructure of steels was observed by optical microscopy(OM)and scanning electron microscopy(SEM)before and after tensile test.It was found from the experimental results that the tensile strength of these steels increased,and the fracture elongation firstly decreased and subsequently increased,as the strain rate increased in the range of 0.1-2 000s-1.The temperature raised during adiabatic heating of TRIP steel was in the range of 100-300℃,while that of the DP steel was in the range of 100-220 ℃.The temperature rise of these steels increased with increasing the strain rate,as well as the amount of the transformed retained austenite in TRIP steels.It was confirmed that austenite to martensite transformation is not suppressed by adiabatic heating. 相似文献
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轧钢加热炉燃用单一高炉煤气,可用于加热60mmX60mm断面的钢坯,加热能力可达26~28t/h,完全可以满足年产10~12万t的棒材生产线加热能力。同时,以单一高炉煤气为主燃料,辅以其它燃烧系统,是提高加热能力的重要途径。 相似文献
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介绍了35t/h锅炉扩容改造为55t/h非标锅炉的技术成功经验。从增加锅炉的容积、受热面面积、燃烧器喷嘴改造三个方面介绍了对锅炉本体的改造,改造后实现了锅炉的水位、汽温及燃烧自动调节,提高了锅炉的热效率为以后的锅炉扩容改造提供了实践经验。 相似文献
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研究了两种加热速率(200℃/min和50℃/h)下60%,70%和80%冷形变量的IF钢罩式退火再结晶晶粒分布规律;当冷变形量大于或等于70%时,IF钢再结晶晶粒分布符合对数正态分布,在此基础上采用非线性回归求出再结晶晶粒尺寸分布函数(SDF);研究结果表明,形变量对再结晶晶粒的影响比加热速率显著。 相似文献
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A. A. Nikolaev D. E. Kirpichev A. V. Nikolaev Yu. V. Tsvetkov 《Russian Metallurgy (Metally)》2013,2013(11):820-824
The possibility of pyrometallurgical processing of a loparite concentrate at a temperature of 2000–4000 K and a pressure of 0.1 MPa is thermodynamically studied using the TERRA software package. It is found that the niobium concentration in the concentrate almost doubles during plasma heating as a result of thermal decomposition and the precipitation of rare-earth metals into a gas phase. Crude niobium can be extracted from the thermally decomposed concentrate by carbothermic or aluminothermic reduction. After plasma-arc vacuum refining, crude niobium can be used for making commercial ferroniobium. The calculated energy consumed for the plasma production of ferroniobium from the loparite concentrate by carbothermic or aluminothermic reduction under adiabatic conditions is 46.6 or 79.0 GJ/(t ferroniobium), respectively. The energy consumption can even be increased severalfold, and the implementation of the process remains economically efficient at the existing market price of ferroniobium. 相似文献
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主要介绍了底部加热技术在攀钢240 t/h锅炉的应用情况,通过锅炉点火升压时壁温差产生机理,引出了相关控制方法,并对底部加热方式与"煨炉"方式进行了经济性和应用效果的综合比较,说明了底部加热方式应用的优势,同时,提出了现底部加热系统安全应用的注意事项。 相似文献
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潍焦集团粗苯加氢项目采用导热油加热技术代替蒸汽热源技术,同时将外部热耦合精馏技术和蒸发式空气冷却器技术应用到粗苯加氢精制装置中,节约中压蒸汽4.5t/h,低压蒸汽10.5t/h,新水25m3/h,年节约成本1976万元。 相似文献