摘要
基于蒙脱石良好的悬浮分散性、阳离子交换性、黏结性等特性,本文采用CMC-Na和无机轻质氧化镁对膨润土进行复配改性制备系列膨润土钻井泥浆产品,通过高温热滚实验,并结合SEM、XRD、FT-IR及Zeta电位等分析手段研究了改性剂种类与用量等对膨润土造浆性能的影响及作用机理,获得最优复配改性方案。结果表明,CMC-Na长碳链能够在蒙脱石边缘起桥联作用,显著提高泥浆的黏度,增强泥浆体系的稳定性,而氧化镁水化过程中生成氢氧化镁,提高了膨润土在水中的分散性与膨胀性。当CMC-Na和轻质氧化镁均为4%时,膨润土泥浆的黏度为高达42 mPa·s,滤失量低至22 mL,各项性能指标均满足国标要求。本研究提出的复配改性工艺方案简便、成本低,为膨润土改性增粘研究提供了坚实的实验基础和理论支撑,具有广泛的推广价值和应用前景。
Based on good properties of suspension dispersion,cation exchange and cohesiveness of montmorillonite,in this paper,a series of bentonite drilling mud products were prepared through the compound modification of bentonite using the CMC-Na organic polymer and inorganic light magnesium oxide.The effects of different types and dosages of modifiers on the pulping properties of bentonite drilling mud products and their action mechanisms have been investigated through the high-temperature hot rolling experiments in combination with analytical methods of the SEM,X-ray diffraction,FT-IR and Zeta potential measurement.The optimal compound modification scheme has been obtained.The results show that the bridging function on the edge of montmorillonite played by the long carbon chain of the CMC-Na significantly improved the mud viscosity and enhanced the stability of the mud system.The magnesium hydroxide produced by the hydration of magnesium oxide improved the dispersion and expansibility of bentonite in water.When contents of the CMC-Na and light magnesium oxide are both 4%,the viscosity of modified bentonite mud was 42 mPa·s,the filtration loss of the mud was 22 mL,and all the performance indicators meet the requirements of the national standard.The compound modification process scheme proposed in this study is simple and low-cost,which provides the experimental basis and theoretical support for further studying the modification and viscosification of the bentonite mud.Therefore,it has extensive popularization value and application prospect.
作者
蒋俊
罗利明
孙红娟
赵猛
孟繁明
马亮
先子均
JIANG Jun;LUO Liming;SUN Hongjuan;ZHAO Meng;MENG Fanming;MA Liang;XIAN Zijun(School of Environment and Resources,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;Nuclear Environmental Safety Technology Innovation Center,Mianyang Sichuan 621010,China;Institute of Mineral Materials and Application,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;Key Laboratory of Solid Waste Treatment and Resource Recycling,Ministry of Education,Mianyang Sichuan 621010,China;Xinjiang Central Africa Xiazi Street Bentonite Co.,LTD.,Karamay Xinjiang 834000;Xianyang Non-metallic Ore Research and Design Co.,LTD.,Xianyang Shaanxi 712000,China)
出处
《矿物学报》
北大核心
2025年第5期994-1004,共11页
Acta Mineralogica Sinica
基金
建筑材料工业地质勘查中心揭榜挂帅专项资助(编号:建地科[2022]05号)
国家自然科学基金(编号:42002039、42072048)。
关键词
膨润土
复配改性
泥浆性能
PH调节
高温黏度
bentonite
compound modification
mud properties
pH regulation
high temperature viscosity
