低密度高强度覆膜陶粒支撑剂的制备与性能研究

Study on the Preparation and Performance of Low-density and High-strength Coated Ceramic Proppants

以工业废料粉煤灰为主要原料,以Mn O2和钾长石作为助熔剂,采用传统造粒方法和高温烧结技术,结合树脂覆膜的方法,制备了低密度高强度的树脂覆膜陶粒支撑剂。研究了Mn O2的加入量、烧结温度、保温时间对陶粒支撑剂性能的影响规律,利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对陶粒支撑剂中主要晶相和显微结构进行了分析。研究结果表明:当加入2wt%的Mn O2时,显著降低了支撑剂的烧成温度,促进烧结提高了致密度。通过树脂覆膜大幅提高了支撑剂的性能,覆膜后,其52 MPa破碎率最多下降了87.3%,视密度也显著下降。

According to the steps of granulation, high temperature sintering and then resin coating, the resin-coated ceramic proppant with low density and high strength was prepared by using fly ash as main raw materials, MnO2 and potassium feldspar as cosolvents. The influence of different addition of MnO2, sintering temperature and sintering time on the properties of the proppant was studied, and the main crystalline phase and microstructure of the proppant were investigated by XRD and SEM. The results show that the sintering temperature was significantly reduced and the relative density was improved by adding 2wt% MnO2. The performance of proppant was significantly improved by coating with resin, the damage rate under 52 MPa decreased by a maximum value of about 87.3% , and the apparent density was also decreased.