土木工程泥浆用膨润土改性增效技术研究  

Investigation on Modification of Bentonite to Improve Performance for Civil Engineering Mud

作　　者：张然[1,2] 宋广毅 刘岩[1,2] 胡宏杰 ZHANG Ran;SONG Guangyi;LIU Yan;HU Hongjie(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450006,China;National Engineering Center for Multipurpose Utilization of Non−Metallic Miner al Resources,Zhengzhou 450006,China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]国家非金属矿资源综合利用工程技术研究中心,河南郑州450006

出　　处：《矿产保护与利用》2023年第4期96-100,共5页Conservation and Utilization of Mineral Resources

基　　金：国家重点研发计划课题(2022YFC2904804)。

摘　　要：对河南洛阳吸蓝量为35.2 g/100 g和23.6 g/100 g的两种膨润土分别进行钠化改性和增效剂共混处理,制备土木工程泥浆用膨润土。系统研究了钠化剂、增效剂对膨润土泥浆性能的影响。研究结果表明,钠化改性对吸蓝量为35.2 g/100 g的高品位膨润土增黏效果更加显著,4%Na_(2)CO_(3)半干法改性可使高品位膨润土黏度由3 mPa·s提高到34 mPa·s。高品位膨润土钠化后添加0.75%Na−CMC共混可达到高黏膨润土标准。SPA和不同增效剂复配可以有效提高膨润土的黏度、降低滤失量和动塑比;0.2%SPA+1%PAC复配效果最好,可使吸蓝量为23.6 g/100 g的低品位膨润土达到中黏膨润土标准。Two kinds of bentonite with the ethylene blue adsorbed of 35.2 g/100 g and 23.6 g/100 g from Luoyang,Henan Province were Na−modified and mixed with synergists to develop civil engineering mud.The effects of sodium agent and synergists on the mud properties of bentonite were systematically studied.The results showed that the effect of Na−modification on the viscosity of high−grade bentonite with the ethylene blue adsorbed of 35.2 g/100 g was more significant,and the viscosity of high−grade bentonite was increased from 3 mPa·s to 34 mPa·s by 4%Na_(2)CO_(3) semi−dry modification.The high−grade bentonite could reach the specification of high−viscosity bentonite after the Na−modification by addition of 0.75%Na−CMC.It was found that the combination of SPA and different synergists could effectively improve the viscosity and reduce the filtration loss and yield point/plastic viscosity ratio.The low−grade bentonite with the ethylene blue adsorbed of 23.6 g/100 g could reach the specification of medium−viscosity bentonite by addition of 0.2%SPA+1%PAC.

关 键 词：膨润土 泥浆 钠化 增效剂 

分 类 号：TD985[矿业工程—选矿]