摘要
研究了焙烧温度、时间等因素对冀东磁铁精矿粉球团焙烧质量的影响。当预热温度超过1000℃时,颗粒表面生成液相,造成球团氧化不完全;当焙烧温度超过1275℃时,球团中的脉石大量同化,产生大量硅酸盐液相,降低成品球强度。冀东磁铁精矿球团最佳焙烧工艺为:氧化温度为900~950℃,氧化时间不低于20min,焙烧温度为1250~1275℃,焙烧时间不低于20min。
The effects of roasting time and temperature on the roasting quality of pellet made from Jidong magnetite concentrates are studied in the paper. When the oxidizing temperature is higher than 1 000℃, liquid phase will be formed in the face of grain, so the pellet oxidation is incomplete. When the roasting temperature is higher than 1 275 ℃, the assimilation of gangue minerals will take place and a great amount of silicate liquid phase can be observed, resulting in low strength of the pellet. The optimal technological parameters of the pellet can be summarized as follows: the oxidizing temperature is between 900℃ to 950 ℃, the oxidizing time should be over 20 min; the optimal roasting temperature is between 1 250 ℃ to 1 275℃ and the roasting time should be over 20 minute.
出处
《钢铁研究》
CAS
2008年第1期9-12,共4页
Research on Iron and Steel
基金
河北省自然科学基金资助项目(596239)
关键词
冀东磁铁精矿
球团
焙烧
强度
Jidong magnetite concentrates
pellet
roasting
strength