GF88赤铁精矿制备氧化球团的试验研究  

Research on production of oxidized pellets from GF88 hematite concentrate

作　　者：朱德庆[1] 黄铮静 杨聪聪[1] 潘建[1] 郭正启[1] Zhu Deqing;Huang Zhengjing;Yang Congcong;Pan Jian;Guo Zhengqi(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《烧结球团》2020年第6期61-68,共8页Sintering and Pelletizing

基　　金：广西创新驱动发展专项资金资助项目(桂科AAA18242003)。

摘　　要：随着我国钢铁工业超低排放的推进,球团矿在高炉炉料中的占比逐年升高,球团生产对高品质铁精矿粉的需求也日益增加。本文在对巴西GF88赤铁精矿的基本物理、化学性质进行研究的基础上,通过小型试验、扩大试验及工业试验考察其取代部分进口磁铁精矿用于制备优质氧化球团矿的可行性。结果表明:在磁铁精矿中配加25%的GF88赤铁精矿后,造球所需的膨润土用量降低57%左右,生球强度和热稳定性能良好;模拟链箅机—回转窑球团工艺进行小型及扩大型球团焙烧试验及工业试验表明,在25%GF88铁精矿替代相同配比CCUM赤铁精矿的原料条件下,成品球团矿的机械强度和冶金性能良好。With the promotion of ultra-low emission in China’s iron and steel industry,the proportion of pellets in blast furnace burden is increasing year by year,and the demand for high-quality iron concentrate powder in pellet production is also increasing.Based on the research on the basic physical and chemical properties of Brazilian GF88 hematite concentrate,the feasibility of replacing part of imported magnetite concentrate in preparation of high-quality oxidized pellets is investigated through small-scale test,extended test and industrial test.The results show that:after adding 25%GF88 hematite concentrate to magnetite concentrate,the amount of bentonite required for pelletizing is reduced by about 57%.The strength and thermal stability of green pellet are good.Through simulating chain grate machine-rotary kiln pelletizing process,the small-scale and enlarged pilot pellet roasting tests of grate kiln process and industrial test show that,as 25%GF88 iron concentrate replacing CCUM hematite concentrate with the same proportion,the finished pellets show great strength and metallurgical properties.

关 键 词：GF88赤铁精矿 氧化球团 冶金性能 

分 类 号：TF046.6[冶金工程—冶金物理化学]