| 菱镁矿尾矿制备高活性MgO的性能表征 |
| |
| 引用本文： | 黄明喜,薛建军,高培伟,骆菁菁,张红波,吴泽媚.菱镁矿尾矿制备高活性MgO的性能表征[J].环境工程学报,2012,6(4):1315-1319. |
| |
| 作者姓名： | 黄明喜 薛建军 高培伟 骆菁菁 张红波 吴泽媚 |
| |
| 作者单位： | 1. 南京航空航天大学材料科学与技术学院,南京,211106
2. 南京航空航天大学土木工程系,南京,211106 |
| |
| 基金项目： | 国家高技术研究发展计划（863）项目(2009AA03Z508)； 国家自然科学基金资助项目(60672166)；南京航空航天大学研究生创新基地（实验室）开放基金(2010) |
| |
| 摘 要： | 菱镁矿尾矿经预处理后,在一定条件下制备高活性MgO。使用热重-差热分析仪,分析菱镁矿尾矿的分解温度,应用X射线衍射、SEM分析不同煅烧温度、保温时间对MgO晶体结构的影响,并根据Scherrer公式计算MgO晶粒的尺寸。通过电导率仪测定MgO水化电导率,分析不同条件下的MgO活性,探讨煅烧温度、保温时间、颗粒细度与MgO活性之间的关系。结果发现:煅烧温度在1 050℃,保温时间60 min时,菱镁尾矿完全分解,MgO活性最佳;煅烧温度越高,保温时间越长,MgO的活性越差;MgO颗粒细度越小,活性越高。
|
| 关 键 词： | 菱镁矿尾矿 煅烧温度 活性MgO |
Preparation and properties of high-active MgO from magnesite tailings |
| |
| Huang Mingxi,Xue Jianjun,Gao Peiwei,Luo Jingjing,Zhang Hongbo and Wu Zemei.Preparation and properties of high-active MgO from magnesite tailings[J].Techniques and Equipment for Environmental Pollution Control,2012,6(4):1315-1319. |
| |
| Authors: | Huang Mingxi Xue Jianjun Gao Peiwei Luo Jingjing Zhang Hongbo and Wu Zemei |
| |
| Institution: | 1.School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China; 2.Department of Civil Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China) |
| |
| Abstract: | High active of MgO was prepared from pretreated magnesite tailings under certain conditions.The decomposition temperature of magnesite tailings was analyzed by TG-DTA analyzer.The effect of calcinations temperature and residence time on the crystal structure of MgO was analyzed by X-ray diffraction(XRD) and SEM.Crystal particle of MgO was calculated according to Scherrer formula.The activity of MgO was evaluated through conductivity which was measured by the conductivity meter.The activity of MgO affected by calcinations temperature and residence time and crystal size was studied.The result showed that magnesite tailings was fully decomposed when that was calcined for 60 min with the calcinations temperature of 1 050 ℃,and the activity of MgO was very high.With the increase of temperature and residence time,the activity of MgO decreased.The smaller the MgO particle size was,the higher the activity of MgO was. |
| |
| Keywords: | magnesite tailings calcination temperature activity of MgO |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境工程学报》浏览原始摘要信息 |
| 点击此处可从《环境工程学报》下载免费的PDF全文 |
|
