含油污泥的固化与成型机理研究

Study on the Solidification and Forming Mechanism of Oily Sludge

以含油污泥为研究对象,粉煤灰、黏土、实验室自制液态黏结剂为复合黏结剂进行固化实验,探究不同黏结剂组分掺入量(以质量分数计)对固化块强度的影响,并确定最佳固化剂掺入量。结果表明,在粉煤灰掺入量30%、黏土掺入量10%、液态黏结剂掺入量5%的固化块强度达到最佳;在最佳工艺条件下,固化块的冷强度为2.19 MPa,热强度为2.21 MPa,具有足够的冷强度和热稳定性。利用傅里叶红外光谱(FT-IR)、X射线衍射(XRD)和扫描电子显微镜(SEM)等技术手段研究固化块的成型机理,并根据表征结果提出固化块成型机理。

Taking oily sludge as the research object,this paper conducted solidification experiments with fly ash,clay,and laboratory-made liquid binder as a composite binder.It explored the effects of dosages(mass fractions)of binder components on the solidified block strength and determined the optimum dosage of the curing agent.The results show that the strength of the solidified block is the best in the case of the fly ash dosage of 30%,the clay dosage of 10% and the liquid binder dosage of 5%.Under the optimal process conditions,the cold strength of the solidified block is 2.19 MPa and the hot strength is 2.21 MPa,which indicates that it has sufficient cold strength and thermal stability.The forming mechanism of the solidified block was studied with the help of Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and scanning electron microscopy(SEM).The forming mechanism of the solidified block was put forward according to the characterization results.