摘要
介绍了首钢迁钢、首钢首秦和首钢京唐三个炼钢单元以绿色、高效和洁净钢生产为原则开发的一系列创新技术。1)转炉少渣炼钢技术(SGRS)实现了转炉炉渣的高温循环使用,转炉炼钢石灰、轻烧白云石消耗与炉渣排放量分别降低了45%、35%、31%以上。2)转炉顶底复吹CO_2技术实现了约7%的CO_2混吹,终点炉渣中T.Fe质量分数降低了3.6%、炉渣中P2O5质量分数增加了0.63%、吨钢煤气量增加了5.2 m^3。3)稳定高效转炉底吹技术(SEBC)确保了全炉役转炉高效底吹冶炼效果,平均碳氧积为0.002 0,有效提高了钢水的初始洁净度。4)椭圆浸渍管RH真空精炼技术实现了RH循环流量增加51%,冶炼超低碳钢的脱碳时间缩短4.0 min。5)高拉速连铸技术将连铸拉速提升至2.5 m/min,不仅实现了高效洁净钢平台的贯通,还改善了冷轧钢板表面质量。6)倒角结晶器连铸技术将产生角横裂纹缺陷的含Nb微合金化钢板坯的比例降低至0.14%以下,还减少了冷轧钢板边部翘皮缺陷的发生率。
Progress and initiatives of steelmaking technology developed by three steelmaking units such as Shougang Qian’an Iron and Steel Company(hereinafter abbreviated to SGQG),Qinhuangdao Shouqin Metal Materials Co.,Ltd.(hereinafter abbreviated to SGSQ)and Shougang Jingtang United Iron and Steel Company(hereinafter abbreviated to SGJT)in the principles of environmentally friendly,high efficiency productions and clean steel were introduced.The slag generation reduced steelmaking technology(SGRS)has permitted BOF slag to be reused in high temperature.After the stable use of the technology,the lime consumption,the light burning dolomite consumption and slag emissions were reduced respectively by45%,35%,31%or more.The converter top and bottom blowing CO2technology allowed it to be achieved that total CO2blowing into the converter accounted for about7%of all gases,the mass fraction of T.Fe in the slag was reduced by3.6%,the mass fraction of P2O5in the slag was increased by0.63%,and the amount of gas was increased by5.2m3/t.The stable effective bottom-blowing converter(SEBC)ensured the average product of[C]and[O]under0.0020during the whole life campaign of the converter,which improved the cleanliness of steel greatly.The oval-shaped dipping pipe of RH vacuum refining technology made the circulation flow to be raised by51%,and decarburization time required for smelting ultra-low carbon steel to be shortened by4.0min.The high speed casting technology increased the casting speed to2.5m/min,which is good for both realizing the breakthrough of high efficient clean steel platform and reducing the surface defects of cold rolled sheets.The chamfered mold CC technology permitted probability of producing the transverse corner crack in niobium-containing micro-alloyed steel slabs to be reduced to less than0.14%,and generation of edge upwarping defects of cold-rolled IF steel coils was also decreased.
作者
朱国森
李海波
季晨曦
Zhu Guosen;Li Haibo;Ji Chenxi(Shougang Jingtang United Iron and Steel Company, Tangshan Hebei 063200,China;Shougang Research Institute of Technology, Beijing 100043, China;Beijing key Laboratory of Green Recyclable Process for Iron & steel Production Technology, Beijing 100043, China)
出处
《上海金属》
CAS
北大核心
2018年第1期1-7,27,共8页
Shanghai Metals
