为消除钻井废弃物的环境影响并赋予其较高资源化利用潜力,采用改性氯氧镁水泥,对钻井废弃物进行高强度固化处理,优化固化体系各组成比例,用X射线衍射(XRD)和扫描电子显微镜(SEM)分析固化产物组成及微观结构,并评价其浸出毒性.结果表明:固化钻井废弃物原料组成对其抗压强度有较大影响,最优比例的固化体系,经过压实成型,环境温度下养护,其14 d抗压强度最高可达38 Mpa;胶结材料水化产物中大量的5Mg(OH)2·MgCI2·8H2 O使固化试样产生较大的抗压强度,粉煤灰活性组分反应产物提高了固化物的性能这是晶体共生产生的机械嵌合作用和独特的空间网状结构的结果;固化物浸出毒性符合国家环境标准要求;处理后的钻井废弃物具有较高的抗压强度和环境相容性,处理工业废弃物量高达65.7%.%In order to eliminate the environmental effects and make potential re-use of drilling waste, the research on high strength stabilization/solidification of drilling waste was carried out using modified magnesiuru oxychloride cement. The mass ratios of composition were optimized in solidifying systems, and the hydrate products composition and microstructures were analyzed in bonding material and solidified drilling waste by XRD test and SEM graph. The leaching toxicity was also evaluated. The results show that the mass ratios of added materials greatly affect the compressive strength of solidified drilling waste. The specimen with the optimum ratio of added materials could yield high compressive strength, which was 38 MPa ( 14 d) , curing under ambient temperature after compaction modeling. The large amount of 5Mg( OH)2 · MgCl2 · 8H2O,one of the hydrate products of bonding material, made the high compressive strength in solidified drilling waste, and the products of active components in fly ash could improve the property of solidified drilling waste. The mechanical interlocking and unique microstructure resulting from the intergrowth of the crystals is a major source for the strength development of solidifying systems. The leaching toxicity meet the requirements of national environmental standards. The drilling waste treated has a high compressive strength and environmental compatibility. The solidified drilling waste is as high as 65. 7％ .
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