The utilization of secondary pyrolysis oil-based drilling-cuttings ash (OBDCA-sp) contaminated with Cr (VI) was studied. OBDCA-sp and bauxite were used as raw materials in different ratios to prepare proppants, and performance tests were carried out for the prepared proppants. OBDCA-sp/bauxite proppants had excellent compressive strength and lower density than pure bauxite proppants. A possible reason for this is that the presence of OBDCA-sp exerted an adhesive effect that enhanced the compactness of the proppants. For OBDCA-sp/bauxite proppants with a low mixture ratio of OBDCA-sp to bauxite (<20%), the roundness, sphericity, and other parameters of the proppants were well preserved. Scanning electron microscopy analysis indicated increased surface collapse of proppants with increasing mixture ratio of OBDCA-sp to bauxite. The X-ray diffraction results indicated that increasing the mixture ratio of OBDCA-sp to bauxite resulted in a lower bauxite phase structure in proppants. The X-ray photoelectron spectrum analysis and leaching experiment indicated that the proportion of hazardous Cr was reduced with the enhanced mixture ratio of OBDCA-sp to bauxite. This study provides an economical and ecofriendly method to utilize Cr (VI)-contaminated OBDCA-sp.

中文翻译：

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含铬油基钻屑灰在铝土基支撑剂制备中的应用

研究了Cr（VI）污染的二次裂解油基钻屑灰（OBDCA-sp）的利用。以OBDCA-sp和铝土矿为原料，按不同比例制备支撑剂，并对制备的支撑剂进行性能测试。OBDCA-sp/铝土矿支撑剂比纯铝土矿支撑剂具有优异的抗压强度和更低的密度。造成这种情况的一个可能原因是 OBDCA-sp 的存在发挥了粘合作用，增强了支撑剂的致密性。对于 OBDCA-sp/铝土矿支撑剂，OBDCA-sp 与铝土矿的混合比低（<20%），支撑剂的圆度、球形度和其他参数得到了很好的保留。扫描电子显微镜分析表明，随着 OBDCA-sp 与铝土矿的混合比增加，支撑剂的表面塌陷增加。X 射线衍射结果表明，增加 OBDCA-sp 与铝土矿的混合比会导致支撑剂中铝土矿相结构的降低。X射线光电子能谱分析和浸出实验表明，随着OBDCA-sp与铝土矿混合比的增加，有害Cr的比例降低。本研究提供了一种经济且环保的方法来利用受 Cr (VI) 污染的 OBDCA-sp。