污泥的掺烧量对水泥品质的影响研究

Effect of the Mixed Incineration Amount of Municipal Sludge on the Cement Quality

通过水泥生料易烧性、以及熟料XRD、SEM和水泥强度等试验,研究了城市生活污泥的掺烧量对水泥品质的影响。结果表明,水泥生料中掺烧城市生活污泥可以改善并提高水泥生料的易烧性。当污泥掺量低于15 wt%时,随污泥掺量增多,熟料中A矿量增大,B矿量减少,熟料的抗折和抗压等物理性能显著增强,水泥品质得到提高。当污泥掺量超过15%wt时水泥品质略有下降。适宜的污泥掺烧量不大于15 wt%,利用水泥窑掺烧处理城市生活污泥是可行的。

In order to investigated the influence of mixed incineration amount of the municipal sludge on the cement quality,the burnability of raw cement,the XRD and SEM characters of the cement clinker and strength of cement have been explored.The results showed that the mixed incineration of municipal sludge in the raw cement could improve the burnability of the raw cement.With the increasing of mixed incineration amount of sludge below 15 wt%,the amount of Alite crystalline phase in the cement clinker increased,the mount of Belite crystalline phase decreased and the physical properties such as bending strength and compressive strength significantly increased,the cement quality was improved.The cement quality was slightly decreased when mixed incineration amount of sludge was above 15 wt %.Mixed incineration amount lower than 15 wt% was appropriate.The method of the municipal sludge mix-incinerated in the cement turning kiln is feasible.