低硅碱性球团矿配加灰石筛下物试验与工业应用  

Test and industrial application of low silicon alkaline pellet with limestone under sieve

作　　者：董相娟 田筠清 青格勒 孙大为 李明 吴巍[1] DONG Xiangjuan;TIAN Yunqing;QING Gele;SUN Dawei;LI Ming;WU Wei(Metallurgical Technology Research Institute,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;Manufacture Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,Hebei,China;Research Institute of Technology,Shougang Group Co.,Ltd.,Beijing 100043,China)

机构地区：[1]钢铁研究总院有限公司冶金工艺研究所,北京100081 [2]首钢京唐钢铁联合有限责任公司制造部,河北唐山063200 [3]首钢集团有限公司技术研究院,北京100043

出　　处：《中国冶金》2024年第6期83-91,共9页China Metallurgy

摘　　要：钙质熔剂与铁料混合经细磨后配入球团矿的方法在国内炼铁行业中应用较少。将灰石筛下物与铁矿粉混磨后配入球团矿,可以提高钙质熔剂的均质化水平,提高熔剂活性,改善球团矿质量,同时实现固废资源的二次利用。首钢京唐钢铁联合有限责任公司进行了球团矿配加灰石筛下物试验及工业实践,通过磨矿功指数检测和过滤性能试验,评估磨矿的经济性和可磨性;通过造球及焙烧试验,得到灰石筛下物与铁料混磨对球团矿质量的影响趋势。结果表明,配加灰石筛下物与铁矿粉混磨产物后熔剂钙质分布更均匀,与铁矿粉结合更紧密;球团矿固结质量保持在较高水平,抗压强度在3196 N/P以上;还原性能有所改善,还原膨胀率从14.5%降低至13.8%,还原度从84.8%提高至86.9%。Calcium based fluxes are mixed with iron ore and finely grinded and added into pellets,which are rarely used in domestic ironmaking industry.Mixing ground limestone under sieve and iron ore powder into pellets can improve the homogenization level of calcium flux,enhance the activity of flux,improve the quality of pellets,and realize the secondary utilization of solid waste resources.Shougang Jingtang United Iron and Steel Co.,Ltd.carried out pelletizing test and industrial practice with limestone under sieve.The economy and grindability of grinding were evaluated through bond work index detection and filtration performance test.Through the balling and roasting tests,the impact trend of the mixed grinding of limestone under sieve and iron materials on the quality of pellets was obtained.The results show that the flux has a more uniform distribution of calcium after adding the mixture of limestone under sieve and iron ore powder,and is more closely combined with iron ore powder.The consolidation quality of pellet remains at a high level,with a compressive strength of over 3196 N/P.The reduction performance has a trend of improvement,with the reduction expansion rate decreasing from 14.5%to 13.8%,and the reduction degree increasing from 84.8%to 86.9%.

关 键 词：灰石筛下物 碱性球团矿 熔剂分布均质化 固结质量 冶金性能 

分 类 号：TF046.6[冶金工程—冶金物理化学]