稀土尾矿对水泥熟料性能的影响

试验选用云南楚雄州某地稀土尾矿,以稀土尾矿部分取代黏土原料进行水泥熟料煅烧试验。试验结果表明:掺入稀土尾矿及铅锌矿烧成熟料中的f-CaO含量明显减少,生料的易烧性提高;其3 d、7 d和28 d抗压强度均有不同程度的提高;水泥熟料中的C3S、C3A和C4AF含量有所增加,对水泥熟料的烧成起到促进作用,有利于水泥熟料矿物的形成,尤其是熟料中的C3S增加明显。

Effects of Rare Earth Tailings on the Properties of Cement Clinker

Cement clinker burning test was done by using Yunnan some rare earth tailings instead of clay raw materials.Test results show that the mixed rare earth tailings and lead-zinc mine to burn in the mature makings f-CaO content decreased significantly,the raw material is easy to burn;The three days, seven days and 28 days compressive strength increase to some extent;C3S and C3A and C4AF content of Cement clinker increase,which promote the cement clinker sintering,is beneficial to the formation minerals in cement clinker,especially the C3 S in clinker increase significantly.