| 养护龄期对EDTA滴定法测定尾砂胶结充填体水泥含量的影响研究 |
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| 引用本文： | 陈鑫政,杨小聪,郭利杰,彭啸鹏.养护龄期对EDTA滴定法测定尾砂胶结充填体水泥含量的影响研究[J].有色金属工程,2019,9(4). |
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| 作者姓名： | 陈鑫政 杨小聪 郭利杰 彭啸鹏 |
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| 作者单位： | 北京矿冶科技集团有限公司；国家金属矿绿色开采国际联合研究中心,北京矿冶科技集团有限公司；国家金属矿绿色开采国际联合研究中心,北京矿冶科技集团有限公司；国家金属矿绿色开采国际联合研究中心,北京矿冶科技集团有限公司；国家金属矿绿色开采国际联合研究中心；北京科技大学土木与资源工程学院 |
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| 基金项目： | 国家重点研发计划(2016YFC0600709),国家自然科学(51774040),北京矿冶研究总院青年创新基金(QC-201728) |
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| 摘 要： | 在应用EDTA滴定法测尾砂胶结充填体水泥含量中,因充填体的EDTA二钠标准溶液消耗量随养护龄期的增长而降低导致测定不同养护龄期充填体的水泥含量需分别制定标准曲线,为研究养护龄期对充填体EDTA二钠标准溶液消耗量的影响,本文通过开展试验研究,并利用扫描电镜(SEM)分析技术进一步验证试验结果,得出养护龄期主要是通过影响水泥水化进程,进而影响NH4Cl弱酸溶液溶解充填体中的Ca2 含量而影响充填体EDTA二钠标准溶液消耗量的结论。
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| 关 键 词： | 充填体养护龄期 EDTA滴定法 扫描电镜(SEM) |
| 收稿时间： | 2018/3/4 0:00:00 |
| 修稿时间： | 2018/3/6 0:00:00 |
Study on the Effect of Age on the Determination of Cement Content in Cemented Tailings Backfill by EDTA Titration Method |
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| CHEN Xin-zheng,YANG Xiao-cong,GUO Li-jie and PENG Xiao-peng.Study on the Effect of Age on the Determination of Cement Content in Cemented Tailings Backfill by EDTA Titration Method[J].Nonferrous Metals Engineering,2019,9(4). |
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| Authors: | CHEN Xin-zheng YANG Xiao-cong GUO Li-jie and PENG Xiao-peng |
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| Affiliation: | BGRIMM Technology Group;National Center for International Joint Research on Green Metal Mining,BGRIMM Technology Group;National Center for International Joint Research on Green Metal Mining,BGRIMM Technology Group;National Center for International Joint Research on Green Metal Mining,BGRIMM Technology Group;National Center for International Joint Research on Green Metal Mining;School of Civil and Environmental Engineering, University of Science and Technology Beijing |
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| Abstract: | In the determination of cement content in cemented tailings backfill by EDTA titration method, the filling body at different ages use different standard curves because the consumption of EDTA disodium standard solution decreases with the age growing of the filling body. To study the effect of age on the consumption of EDTA disodium standard solution of the filling body, the research experiment and further verification test using scanning electron microscopy (SEM) were conducted in this paper and it concludes that the age influences the consumption of EDTA disodium standard solution of the filling body mainly through affecting the process of cement hydration and the Ca2 content in the filling body dissolved by the NH4Cl weak acid solution. |
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| Keywords: | age of the filling body EDTA titration method scanning electron microscope (SEM) |
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