球团配加赤铁精矿的试验研究  

Test Study of Adding Hematite Powder in Pellet

作　　者：贺建峰[1] 潘宝巨[2] 王志花[2] 

机构地区：[1]济南钢铁股份有限公司技术中心,山东济南250101 [2]钢铁研究总院,北京100081

出　　处：《山东冶金》2010年第4期26-30,共5页Shandong Metallurgy

摘　　要：利用球团模拟试验炉对配加10%～50%的赤铁精矿进行了试验,试验条件:干燥温度600℃,时间10 min;预热温度900℃,时间20 min;强氧化性气氛,焙烧30 min。结果表明,生产强度>200 kg/个的球团矿,赤铁精矿配比30%以下时,需要的最低焙烧温度为1 180℃;35%时,最低为1 200℃;40%～50%时,则最低为1 220℃以上。赤铁精矿配比从10%增加到50%,可使球团矿的铁品位增加约0.7%、SiO2含量降低1%;还原度及低温还原120粉化率相差不大。同时,进行了配加煤粉、焦粉、有机黏结剂和PT粉的探索试验,试验表明,添加物对降低焙烧温度和提高球团矿强度有较好的作用,配加3%的PT粉,赤铁精矿配比30%球团矿的焙烧温度可降低50℃以上。We made the simulation experiments of adding 10% to 50% of the red iron ore by pellet furnace. The test conditions were as follows： drying temperature 600 ℃, time 10 min; preheating temperature 900 ℃, time 20 min and roasting 30 min in strong oxidizing atmosphere. The results showed that when the red iron ore ratio was below 30%, the minimum roasting temperature of producing thepellets with the strength of 200 kg per piece above was1 180 ℃; the 35%, the lowest temperature was 1 200 ℃; the 40% - 50 %, then the lowest temperature was over 1 220 ℃. When the ratio of red iron ore increased from 10% to 50%, a grade of iron in ore pellet increased by about 0.7% and the SiO2 content decreased by 1%; the reduction degree and the low temperature reduction degradation index differed little. At the same time, we carried out exploration experiments of adding coal powder, coke powder, organic binder and PT power. Tests showed that the additives had good effects on decreasing the roasting temperature and increasing the strength of the pellets.Adding 3% of PT powder in the pellet with 30% of red iron ore, the roasting temperature can be reduced by 50 ℃ above.

关 键 词：球团 赤铁精矿 焙烧温度 球团强度 

分 类 号：TF046.6[冶金工程—冶金物理化学]