摘要
能效减碳背景下,宝钢热轧厂进行了连铸—直接热装轧制(DHCR)工艺的探索。工艺过程中钢坯温度变化规律以及温度均匀性情况,将直接影响到轧制质量。为此,试验之初对钢坯在DHCR工艺过程中的温度变化进行了数值模拟,分析了钢坯在输运和各加热段的温度分布及断面温差情况。通过数值模拟计算发现,出炉钢坯平均温度1150℃,可满足此类钢终轧温度(880±30)℃的需求;出炉钢坯温差最大值在35 K以内,满足轧制工艺对钢坯加热均匀性的要求。对标数值模拟的工况进行了工业试验,将模拟结果与试验结果进行了对比,验证了数值模拟的合理性。同时,对试验钢坯进行了轧制性能跟踪,现场反馈质量良好。本次工业试验燃耗为28.6 kgce/t,与现有工艺相比,燃耗降低了33.7%,CO2排放降低了38.09 kg/t。
Under the background of energy efficiency and carbon reduction,the Continuous Casting-Direct Hot charging Rolling(CC-DHCR)technology was explored in Baosteel Hot Rolling Plant.The temperature variation and temperature uniformity of the billet directly affect the rolling quality.Therefore,at the beginning of the industrial trial,numerical simulation of the temperature profile change of the steel billet in the CC-DHCR had been done,the billet temperature distribution and cross-section temperature difference during its transportation and heating process were analyzed.According to the numerical simulation calculation,the average temperature of billet discharged from heating furnace is 1150℃,meeting the requirement of final rolling temperature in(880±30)℃for this kind of steel;the maximum temperature difference of billet discharged from furnace is within 35 K,which meets the requirement of billet heating uniformity for rolling process.The simulation results were compared with the experimental results,through which the rationality of simulation was validated.Hereafter,the industrial trial billet was rolled and its rolling quality showed good during the tracking.In this DHCR industrial trial,compared with current traditional process,the fuel consumption is 28.6 kgce/t,which is reduced by 33.7%,and the CO2 emission is reduced 38.09 kg/t.
作者
刘燕燕
孙业中
司文强
LIU Yanyan;SUN Yezhong;SI Wenqiang(Research Institute,Baoshan Iron & Steel Co. ,Ltd. , Shanghai 201999, China;Hot Rolling Plant,Baoshan Iron & Steel Co. ,Ltd. , Shanghai 200941, China)
出处
《宝钢技术》
CAS
2021年第4期27-33,共7页
Baosteel Technology
关键词
碳减排
连铸—直接热装轧制
钢坯温度
数值模拟
工业试验
carbon reduction
Continuous Casting-Direct Hot Charging Rolling(CC-DHCR)
steel billet temperature
numerical simulation
industrial trial
