摘要
通过添加不同比例的蛇纹石及轻烧白云石来提高球团原料中MgO含量.模拟包钢球团矿生产工艺进行焙烧,对生球性能、成品球抗压强度及还原膨胀性能进行研究,以探明包钢自产球团矿提高MgO含量的合理技术措施.研究表明：当加入2.0%的皂土并配加4.0%以下的轻烧白云石或2.2%以下的蛇纹石时,所制备生球性能均能满足生产要求;当轻烧白云石添加量由2.0%增加至4.0%时,1250℃下焙烧的成品球团矿的抗压强度由2250N/个降低为2239N/个,其还原膨胀率由32.1%升高至34.5%;当蛇纹石添加量由1.1%增加至2.2%时,1250℃下焙烧的成品球团矿抗压强度由2250N/个降低为2248N/个,其还原膨胀率由19.7%降低至16.7%.因此,对于包钢自产铁精矿生产含氧化镁球团矿,其含镁熔剂的最佳添加方式为配加蛇纹石.
Through the addition of different proportion serpentine and lighting roasting dolomite, the content of MgO in raw material was increased. Baogang pellets production technology for roasting was simulated. The performance of green pellet , the reduction swelling characters and compressive strength of the finished product were studied in order to prove up a reasonable technical measure to improve the content of MgO in Baogang -produced pellets. Research shows that, when adding 2.0% bentonite together with light burned dolo- mite of less than 4.0% or serpentine below 2.2%, the preparation of raw ball performance can meet the production requirements ; when light burned dolomite content was increased from 2.0% to 4.0% , the compressive strength of the pellets at 1 250℃ was reduced from 2 250 N to 2 239 N, with the reduction of inflation rate increased from 32.1% to 34.5%. When serpentine content increased from 1.1% to 2.2% ,the compressive strength of the calcination pellets product under 1 250℃ decreased to 2 248 N from 2 250 N, with the inflation rate reduced to 16.7% from 19.7%. Therefore, the best way for the production of iron ore concentrate containing magnesium oxide pellet is to add magnesium flux with the addition of serpentine.
出处
《内蒙古科技大学学报》
CAS
2015年第2期188-192,共5页
Journal of Inner Mongolia University of Science and Technology
基金
国家自然科学基金资助项目(项目编号51364030)
关键词
自产铁精矿
MGO
蛇纹石
球团矿
self-mined concentrates, MgO, serpentine, pellet
