摘要
鄂州球团造球原料粒度和SiO_(2)含量随外购矿种类变化和配矿方案调整波动较大,在生产碱性球团时,需要考虑配矿结构对球团性能的影响。针对上述问题,本研究以5种鄂州球团生产用料为研究对象,通过改变造球原料配比与熔剂添加量,调整原料结构与碱度,查明不同配矿结构下碱度对生球性能和干燥特性的影响。结果表明,当MUSA精矿占比为50%时,生球性能较优,在碱度为0.8条件下分别使用石灰石、活性灰和石小粒作为熔剂时,3种碱度的生球落下强度分别为6.9、6.4和5.9次/(0.5 m),抗压强度分别为23.5、26.0和23.2 N/P,爆裂温度大于450℃。当干燥时间为10 min,各方案碱性生球均干燥完成,干燥速率略慢于自然碱度生球(8 min左右)。
The particle size and SiO_(2)content of the raw materials for Ezhou pellet production fluctuate greatly with changes in the type of purchased ore and adjustments to the blending scheme.When producing alkaline pellets,it is necessary to consider the impact of blending structure on pellet performance.In response to the above issues,this study focuses on five types of materials used in the production of Ezhou pellets.By changing the ratio of pelletizing raw materials and the amount of flux ore added,adjusting the structure and alkalinity of raw materials,the influence of alkalinity on the performance and drying characteristics of green pellets under different ore blending structures is investigated.The results showed that when the proportion of MUSA concentrate was 50%,the performance of the green balls was better.When limestone,active ash,and small stone particles were used as fluxes under the condition of alkalinity of 0.8,the falling strength of the green balls for the three alkalinity was 6.9,6.4,and 5.9 times/(0.5 m),the compressive strength was 23.5,26.0,and 23.2 N/P,when the drying time was 10 min,the alkaline pellet of each scheme was dried and the drying rate was sightly slower them that of the nature alkaline pellet(about 8 minutes).
作者
吴建
周冰致
周峰
张汉泉
路漫漫
WU Jian;ZHOU Bingzhi;ZHOU Feng;ZHANG Hanquan;LU Manman(Ezhou Pellet Co.,Ltd.of Wuhan Iron and Steel Resource Group,Ezhou 436000,Hubei,China;College of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan 430205,Hubei,China)
出处
《烧结球团》
北大核心
2024年第4期63-69,76,共8页
Sintering and Pelletizing
基金
湖北省重点研发计划资助项目(2022BCA062)。
关键词
碱性球团
配矿结构
生球性能
干燥特性
alkaline pellet
ore blending structure
green pellet performance
drying characteristics
