碱金属对高炉原料冶金性能的影响  

Influence of alkali metals on metallurgical performance of charge for blast furnace

作　　者：王冲 谢冬 冯帅 刘明婕 WANG Chong XIE Dong FENG Shuai LIU Mingjie(Hanbao Ironmaking Plant, Handan Iron and Steel Group Co., Ltd. of HBIS, Handan 056000 ,Chin)

机构地区：[1]河北钢铁集团邯郸钢铁公司邯宝炼铁厂,河北邯郸056000

出　　处：《钢铁研究》2017年第1期6-9,共4页Research on Iron and Steel

摘　　要：通过分析碱金属在高炉内的还原和循环机理,研究了碱金属对焦炭、烧结矿、球团矿等原料冶金性能的影响。结果表明:随着碱负荷的增加,焦炭的CRI升高,CSR下降,当焦炭中碱负荷由0.0 kg/t升高到0.7 kg/t时,焦炭的反应性增加14.28%,反应后强度下降14.39%,可见少量的碱金属就能催化焦炭的气化反应;随着碱负荷的增加,烧结矿和球团矿的低温还原粉化率RDI-3.15和RDI-0.5升高,而RDI+6.3却迅速下降。严格控制烧结矿、球团矿、焦炭的碱金属含量是降低碱金属危害的根本措施。The influences of alkali metals on metallurgical properties of charge such as coke,sinter,pellet etc. were studied by analyzing the reduction and circulation mechanism of alkali metals in blast furnace.The results showed that CRI of the coke was raised and CSR was decreased with the alkali metals content increasing. When the alkali metals content in coke rose from 0. 0 kg/t to 0. 7 kg/t,CRI of coke increased by 14. 28 % and CSR reduced by 14. 39 %. Therefore,the gasification reaction of coke was catalyzed by small quantity alkali metals. RDI-3. 15 and RDI-0. 5of the sinter and the pellets were increased and RDI＋ 6. 3was declined rapidly with the alkali load increasing. Controlling the alkali metals content of sinter,coke and pellets strictly was the basic measure to reduce the hazard of alkali metals.

关 键 词：碱金属 焦炭 烧结矿 球团矿 低温还原粉化率 

分 类 号：TF534.1[冶金工程—钢铁冶金]