直接还原铁尺寸对电弧炉冶炼的影响  

The Influence of Direct Reduced Iron Size on EAF Smelting

作　　者：康旭 曹震巍 王强 刘崇 李双江 张俊粉 Kang Xu;Cao Zhenwei;Wang Qiang;Liu Chong;Li Shuangjiang;Zhang Junfen(HBIS Material Technology Research Institute,Shijiazhuang 052135,China;HBIS Group Zhangxuan Technology,Xuanhua 075100,China)

机构地区：[1]河钢材料技术研究院,石家庄052135 [2]河钢集团张宣科技,宣化075100

出　　处：《特殊钢》2025年第1期75-78,共4页Special Steel

摘　　要：以张宣科技Consteel电弧炉冶炼的40Cr钢为研究对象,通过开展电弧炉配加30 t不同尺寸直接还原铁(DRI)试验,研究了Consteel电弧炉配加不同尺寸DRI对电弧炉冶炼过程、钢铁料消耗、电耗和电弧炉终渣成分的影响。结果表明,电弧炉冶炼40Cr钢过程配加小尺寸DRI易导致冶炼过程溢渣量增大,且溢渣中FeO含量较高,钢铁料消耗和电耗升高,终渣碱度降低,终渣FeO含量升高。同时,电弧炉配加小尺寸DRI时排出的炉渣易在渣罐底形成“铁铊”。电弧炉冶炼40Cr钢配加DRI尺寸≤6.3 mm占比低于8.5%时冶炼效果较好。可对DRI进行筛分后使用,筛掉尺寸较小的DRI,同时,避免空料仓上料,尽量在半仓或高于半仓上料,避免落差较大DRI破碎使小尺寸占比升高。Taking the 40Cr steel smelted by Consteel EAF of Zhang Xuan Technology as the research object,the effects of adding different particle size direct reduced iron(DRI)to the Consteel EAF on the EAF smelting process,steel material consumption,electricity consumption,and final slag ingredient of the EAF were studied by conducting experiments on adding 30 tons of different particle size DRI to the EAF.The results indicate that adding small-sized DRI during the smelt⁃ing of 40Cr steel in an EAF can easily lead to an increase in slag overflow during the smelting process,and the FeO content in the overflow slag is higher,resulting in an increase in steel and electricity consumption,a decrease in the alkalinity of the final slag,and an increase in the FeO content of the final slag.At the same time,the slag discharged from the EAF with small-sized DRI is prone to forming iron thallium at the bottom of the slag tank.The proportion of EAF smelting 40Cr steel with DRI size≤6.3 mm is less than 8.5%,and the smelting effect is better,DRI can be screened and used to re⁃move those with smaller particle sizes.At the same time,avoid loading materials from empty silos,try to load materials in half or above half silos,and avoid large drop DRI crushing that increases the proportion of small particles.

关 键 词：电弧炉 DRI尺寸 碱度 渣中FeO含量 钢铁料消耗 电耗 

分 类 号：TF741[冶金工程—钢铁冶金]