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作 者:李维华 Li Weihua(Technology Center,San Bao Iron and Steel Co.,Ltd.,Zhangzhou 363000,Fujian)
机构地区:[1]福建三宝钢铁有限公司技术中心,福建漳州363000
出 处:《福建冶金》2023年第2期35-38,共4页Fujian Metallurgy
摘 要:本文简要地从热力学和动力学两个方面理论分析了钢液吸氮的原理,并结合公司现场实际生产操作与管理经验,具体从合理提高热装铁水比、合理控制泡沫渣、终点控制与出钢操作优化、LF精炼工艺优化和管理方法优化等几个方面进行攻关,成功将钢中氮含量由攻关前的65×10-6~105×10-6控制到攻关后的55×10-6~64×10-6,结果表明,钢中氮含量在电炉出钢→LF进站→LF出站→中间包→铸坯各过程中是不断增加的,其中钢液在LF进站→LF出站过程中增幅最大,在LF出站→中间包过程中增幅最小。This paper briefly analyzed the principle of nitrogen absorption from molten steel from two aspects of thermodynamics and dynamics.Combining with the actual production operation and management experience of the company,the key points were tackled from the following aspects:reasonably raising the hot metal ratio,controlling the slag,controlling the end point and tapping operation,optimizing the LF refining process and optimizing the management method.The nitrogen content in steel was successfully reduced from 65×10-6~105×10-6 before to 55×10-6~64×10-6 now,the results showed that the nitrogen content in steel increased continuously in the processes of electric furnace tapping→LF entry→LF exit→tundish→slab casting.The increase of liquid steel was the largest in the process of LF entry→LF exit,and the smallest in the process of LF exit→tundish.
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