摘要
高比例铁精矿烧结常面临透气性差、制粒性差及液相生成不足等问题。研究表明,提高活性生石灰的配比能显著强化该烧结过程。系统研究了上述问题,并从理论与实践两方面,阐明了高配比活性生石灰改善烧结性能的作用机理。活性生石灰凭借其高比表面积与强反应活性,可快速消化放热,从而有效抑制过湿层效应、提升混合料温度、优化制粒结构;同时,它能在较低温度下促进铁酸钙及复合铁酸盐等关键液相矿物的生成,进而提高烧结矿的机械强度。结合鞍钢本部的烧结生产实践,进一步提出了应用高配比活性生石灰的工艺优化路径。研究结果可为高比例铁精矿的稳定高效烧结提供理论依据与技术指导,对推动钢铁行业的节能降耗与绿色冶金工艺升级具有重要意义。
The sintering of high-proportion iron ore concentrate is often plagued by such as poor permeability,inadequate granulation and insufficient liquid phase formation.The result showed that increasing the proportion of active quicklime could significantly enhance the sintering process.The problems mentioned above were systematically investigated and the mechanism by which a highproportion of active quicklime improved sintering performance was explained in both theory and practice.Due to its high specific surface area and strong reactivity,active quicklime could quickly hydrate and release heat,thereby effectively suppressing the over-wet layer effect,increasing the mixture temperature,and optimizing the granulation structure.Simultaneously,it could promote the formation of key liquid phase minerals such as calcium ferrite and composite ferrites at lower temperatures,consequently improving the mechanical strength of the sinter.Based on sintering production practices at Ansteel’s main plant,a process optimization path for applying a highproportion of active quicklime was further proposed.The research results can provide a theoretical basis and technical guidance for stable and efficient sintering under high-proportion iron ore concentrate conditions,which is of great significance for advacing energy conservation,consumption reduction,and the upgrade of green metallurgical processes in the steel industry.
作者
周明顺
李志斌
佟琳
孟昕阳
孟超惠
冯清裁
姜喆
ZHOU Mingshun;LI Zhibin;TONG Lin;MENG Xinyang;MENG Chaohui;Feng Qingcai;JIANG Zhe(State Key Laboratory of Metallic Materials for Marine Equipment and Applications,Anshan 114009,Liaoning,China;Ansteel Iron&Steel Research Institutes,Anshan 114009,Liaoning,China;Sintering Plant of Angang Steel Co.,Ltd.,Anshan 114021,Liaoning,China;Donganshan Sintering Plant of Ansteel Group Mining Co.,Ltd.,Anshan 114041,Liaoning,China;Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China;Department of Manufacture Management of Angang Steel Co.,Ltd.,Anshan 114021,Liaoning,China)
出处
《鞍钢技术》
2026年第1期1-11,共11页
Angang Technology
关键词
铁矿石烧结
高比例铁精矿
活性生石灰
作用机理
工艺优化
iron ore sintering
high-proportion iron ore concentrate
active quicklime
mechanism
process optimization
