%A FU Pengcheng, XIAO Guoqing, DING Donghai, FANG Yufei, CHONG Xiaochuan, ZHU Xianfeng %T Preparation and Properties of Low Density and High Strength Ceramic Proppant from High Voltage Electric Porcelain Waste %0 Journal Article %D 2022 %J Materials Reports %R 10.11896/cldb.21010085 %P 21010085-5 %V 36 %N 4 %U {http://www.mater-rep.com/CN/abstract/article_4676.shtml} %8 2022-02-25 %X Ceramic proppant for hydraulic fracturing in oil and gas exploitation was prepared from high voltage electric porcelain waste by air flow superfine grinding, disc granulation and sintering at 1 180—1 260 ℃. The phase composition and micro morphology of ceramic proppant samples sintered at different temperatures were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The density, crushing rate and acid solubility of samples were tested by the methods of petroleum and natural gas industry standards, and the effects of sintering temperature on microstructure and properties of samples were studied. The results show that the main phases of proppant are mullite and corundum. With the increase of sintering temperature, the acicular mullite grains grow up gradually and form a grid structure. The liquid phase is uniformly dispersed and wrapped in the grains, which improves the densification of the sample. However, if the sintering temperature is too high, the degree of secondary mullite in the sample will become higher, and some mullite grains will grow abnormally, resulting in high porosity of proppant and affecting the strength of the sample. The sample shows the highest apparent density and the lowest crushing rate at 1 220 ℃, while the crushing rate is only 6.1% under 69 MPa closing pressure and the apparent density is 2.74 g/cm3, which meets the standard requirements of low density ceramic proppant in SY/T5108-2014.