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详细介绍了本钢炼钢厂薄板坯连铸机引进达湿利的FTSC技术后,生产工艺参数的优化过程,包括结晶器掁动参数的优化、开浇过程的工艺优化,二冷配水工艺的优化等,提高了铸坯的质量和开浇成功率. 相似文献
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在普通连铸中,浸入式水口(SEN)和结晶器中的液流对产品质量是至关重要的,在薄板坯连铸机中,由于注速高,结晶器的长宽比大,因此向其提供钢水更加复杂。这可能带来许多附加的问题,如凝壳生长的均匀交性,表面紊流,结晶器的保护渣夹带,杂上浮以及弯液在宽面凝固等问题。 相似文献
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采用板坯非正弦振动技术,对转炉板坯连铸机结晶器振动系统进行了改造。改造后的系统可改善铸坯质量,减少粘结漏钢事故,减少设备故障,保证生产顺利。 相似文献
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介绍了近年来国内外薄板坯连铸结晶器热流技术的研究与应用、结晶器长寿技术的开发及CSP新型结晶器的研制情况。 相似文献
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薄板坯连铸结晶器的发展现状 总被引:1,自引:1,他引:1
分析了目前出现的几种薄板坯连铸结晶器的基本原理,主要特性和浇铸参数,阐述了它们的优缺点,提出了进一步开发第Ⅲ种类型结晶器的重要意义。 相似文献
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与传统连铸相比,薄板坯连铸在铸坯厚度、浇铸速度、铸态组织、在线连轧等方面都发生了很大变化,既具有冷却强度大、生产线短、能耗低等优点,也具有表面质量不高、产品适应范围较小等缺点.对薄板坯连铸产品组织、化合物析出、产品的适应性等方面的优缺点进行了分析比较,以便客观实际地评价薄板坯连铸连轧生产技术. 相似文献
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The flow field of molten steel and the interfacial behaviour between molten steel and liquid slag layer in medium-thin slab continuous casting mold with argon gas injection were studied by numerical simulation, in which the effects of nozzle submergence depth and port angle, casting speed, and argon gas flow rate on the flow and the level fluctuation of molten steel were considered. The results show that the molten steel is jetted from the submerged entry nozzle (SEN) with three ports into the mold and forms three recirculation zones including one upper recirculation zone and two lower recirculation zones. Argon gas injection results in a secondary vortex flow in the upper zone near the nozzle. For a given casting speed and argon gas flow rate, increasing the side port angle and submergence depth of nozzle can effectively restrain the steel/slag interfacial fluctuation. Increasing the casting speed would prick up the level fluctuation. For a fixed casting speed, argon gas flow rate has a critical value, the interfacial fluctuation with argon gas injection are stronger than the case without argon gas injection when the argon gas flow rate is less than the critical value, but when the argon gas flow rate exceeds the critical value, the level fluctuation is calmer than that without argon gas injection. 相似文献
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简述了攀钢板坯连铸高效化生产技术及其应用效果.通过研究开发适应高拉速要求的连铸保护渣、结晶器冷却制度和钢水温度控制制度,连铸拉速达到1.30~1.80 m/min;通过应用钢包渣改性、精炼工艺优化和高粘度连铸保护渣,IF钢冷轧板卷条痕缺陷率由10.97%降至1%以内;通过合理分配两台板坯铸机功能,推广应用中包快换水口,减少LF工序钢水加热时间和提高RH连续处理能力等技术,铸机作业率由平均89.39%增至92.96%.为攀钢2008年上半年板坯产量达154万t提供了重要的技术支撑. 相似文献
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Interfacial Fluctuation Behavior of Steel/Slag in Medium-Thin Slab Continuous Casting Mold With Argon Gas Injection 总被引:1,自引:0,他引:1
The flow field of molten steel and the interfacial behaviour between molten steel and liquid slag layer in medium-thin slab continuous casting mold with argon gas injection was studied by numerical simulation, in which the effects of nozzle submergence depth and port angle, casting speed, and argon gas flow rate on the flow and the level fluctuation of molten steel were considered. The results show that the molten steel jet from the submerged entry nozzle (SEN) with three ports into the mold and form three re-circulation zones including one upper re-circulation zone and two lower re-circulation zones. Argon gas injection results in a secondary vortex flow in the upper zone near the nozzle. For a given casting speed and argon gas flow rate, increasing the side port angle and submergence depth of nozzle can effectively restrain the steel/slag interfacial fluctuation. Increasing the casting speed would prick up the level fluctuation. For a fixed casting speed, argon gas flow rate has a critical value, the interfacial fluctuation with argon gas injection are stronger than the case without argon gas injection when the argon gas flow rate is less than the critical value, but when the argon gas flow rate exceeds the critical value, the level fluctuation is calmer than that without argon gas injection. 相似文献