摘要
日钢1~4号高炉实施低成本生产后,呈现出入炉矿石品位低、渣量大,以及炉渣(Al_(20)_(3))高且易在炉内滞留等特点,被迫频繁减风减氧,利用系数下降至2.4(m^(3)·d)左右。为此,4号高炉铁口进行了三用一备出铁试验,由2个铁口对称出铁转换为3个铁口轮流出铁,并不断优化改进,炉况稳定性变好,利用系数恢复至2.5V(m^(3)·d)以上,有力地促进了低品位、高铝矿冶炼。对比二用二备,三用一备出铁模式大大减轻了倒场对生产的影响,同时为预防突发事故和应对冲渣定修提供了便利。
After operating in a strategy of low-cost production,No.1-No.4 BFs face the following problems:low ore grade,heavy slag,and high(Al_(20)_(3))content in slag that always accumulate in the furnace,so the blast and oxygen supply has to be slowed down,resulting in the productivity falling to approximately 2.4(m^(3)·d).Facing this challenge,the tapping mode is changed from each two diagonal tap-hole working alternatively to three tap-hole working alternatively,i.e.a tapping mode of"three tap-holes working and one standby"is tried at No.4 blast furnace.Along with constant optimization,the stabilty of furnace condition improves,and the productivity rises to over 2.5(m^(3)·d).The new tapping mode contributes to the success of smelting with low-grade high-alumina ore,and it,as compared to the previous tapping mode,significantly weakens the influence to the production caused by tap-hole switchover,and provides flexibility for emergency response and scheduled maintenance of slag granulation system.
作者
刘世平
罗力
张强
常凯
LIU Shiping;LUO Li;ZHANG Qiang;CHANG Kai(Ironmaking Department,Rizhao Steel Holding Group Co.,Ltd.,Rizhao 276800,Shandong,China)
出处
《炼铁》
北大核心
2025年第5期27-31,36,共6页
Ironmaking
关键词
高炉
低品位
高铝矿
铁口
二用二备
三用一备
blast furnace
low-grade ore
high-alumina ore
tap-hole
two working two standby
three working one standby
