以陶粒的新原料-焦宝石为主要原料,白云石为熔剂性辅料利用陶瓷烧结工艺成功制备了粒径425~850 μm满足35 MPa闭合压力下使用的支撑剂.重点研究了助熔剂白云石的不同添加量对焦宝石陶粒支撑剂晶粒发育及性能的影响.利用SEM和XRD分别对含有不同添加量的白云石的陶粒支撑剂进行了显微形貌和物相结构的分析,并多次测试了陶粒支撑剂的体密、视密和破碎率,结果揭示了白云石的添加有助于促进棒状莫来石晶粒的发育,同时在保证破碎率低于9%的前提下具有降低陶粒支撑剂体密/视密的作用.
Fracturing propping agents, which the grain diameter was 425-850 μm and could be able to work under clossing pressure 35 MPa, were prepared by sintering process with flint clay as a new material and dolomite as adjuvant material.The effects of dolomite addition contenton the grain growth and performance of propping agent prepared by flint clay were investigated deeply.The morphology structure and phase analysis of fracturing proppants were investigated by SEM and XRD.The volume/apparent density and breakage radio of different sample were tested many times.The results reveal that the addition of dolomite in ceramic proppant is helpful to boost mullite and can decrease volume/apparent density but the breakage radio is still below 9%.
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