Cordierite-based ultralow-density high-strength petroleum fracturing propping agent and preparation method thereof

The invention relates to a cordierite-based ultralow-density high-strength petroleum fracturing propping agent and a preparation method thereof. According to the method, talc, kaolin and high-plasticity clay are used as main raw materials, and the cordierite-based ultralow-density high-strength petroleum fracturing propping agent which is good in sphericity (larger than 0.9),apparent density ranging from 2.35 g/cm to 2.65 g/cm , volume density ranging from 1.15 g/cm to 1.45 g/cm , and the breakage rate of the propping agent under the pressure of 69 MPa being smaller than 9%can be prepared through a series of technological processes of wet ball milling, spray granulation, rolling ball granulation, green body screening, high-temperature sintering, and sintered product screening. 本发明公开了一种堇青石基超低密度高强度石油压裂支撑剂及制备方法，该方法以滑石、高岭土、高塑性粘土为主要原料，经湿法球磨、喷雾造粒、滚球制粒、坯体筛分、高温烧成、烧成品筛分系列工艺过程可制备出圆球度良好(球度大于0.9)，视密度在2.35-2.65g/cm3区间，体密度在1.15-1.45g/cm3区间，支撑剂69MPa压力下破碎率小于9％的堇青石基超低密度高强度石油压裂支撑剂。