【摘要】 在对程潮磁铁精矿和膨润土的物化性能、造球性能、生球爆裂温度、生球干燥和预热制度、球团焙烧制度进行实验室研究的基础上 ,进行了链篦机 -回转窑焙烧扩大性试验研究 ,并对球团固结机理进行了研究。确定了生球干燥预热工艺 ,采用二室三段抽风鼓风相结合的干燥预热制度。采用预热球团入回转窑 ,焙烧温度为 12 5 0～ 12 80℃ ,焙烧时间 15min时 ,球团矿的TFe6 5 47% ,FeO0 73% ,抗压强度 30 40N/个 ,转鼓强度 95 3% ,磨损指数 2 6 7% ,球团矿的冶金性能良好。更多还原

【Abstract】 Based on bench-scale experiment,the scale-up experiment of grate-kiln oxidized pelletizing induration process for CHENCHAO magnetite iron ore concentrates was conducted,and the pellet induration mechanism was studied.As a result,the drying-preheeating process for green pellets was determined,and the down draught plus forced draught drying-preheating scheme with tow-chamber and three- section has been selected.With this preheated pellets as kiln feed,at 1?250 ～ 1?280? ℃ roasting temperature and 15min roasting time,the indexes of TFe 65.4%,compression strength 3?040?N/P ,abrasion index 2.67% can be obtained,and the pellets possess good metallurgical properties.更多还原