| 页岩提钒尾渣基地聚合物的制备及其性能 |
| |
| 引用本文： | 徐贤庆,包申旭,张一敏,罗勇鹏.页岩提钒尾渣基地聚合物的制备及其性能[J].硅酸盐通报,2021,40(11):3668-3676. |
| |
| 作者姓名： | 徐贤庆 包申旭 张一敏 罗勇鹏 |
| |
| 作者单位： | 1.武汉理工大学资源与环境工程学院,武汉 430070; 2.矿物资源加工与环境湖北省重点实验室,武汉 430070; 3.武汉科技大学国家环境保护矿冶资源利用与污染控制重点实验室,武汉 430081; 4.武汉科技大学钒资源高效利用湖北省协同创新中心,武汉 430081 |
| |
| 基金项目： | 国家重点研发计划(2018YFC1900606);湖北省技术创新专项重大项目(2018ACA157) |
| |
| 摘 要： | 为将页岩提钒尾渣资源化,利用页岩提钒尾渣作为主要原料,偏高岭土为铝质辅料制备地聚合物。考察了成型方式、硅铝原料配比、碱激发剂种类、碱激发剂用量和成型压力对地聚合物试样抗压强度的影响。结果表明,地聚合物制备最佳条件为:原料的质量配比(尾渣/偏高岭土)为11:9,NaOH碱激发剂质量分数为10%,水固比为0.18,成型压力为20 MPa,试样14 d抗压强度可达58.25 MPa。通过XRD、FTIR、TG-DSC、SEM和孔径分析对地聚合物试样进行检测表征,分析表明,地聚合反应的主要产物为无定形硅铝凝胶和少量钠沸石,无定形硅铝凝胶可以改善试样的孔结构,增强试样微观结构致密度,宏观表现为试样抗压强度增大。
|
| 关 键 词： | 页岩提钒尾渣 地聚合物 碱激发 抗压强度 压制成型 孔结构 |
| 收稿时间： | 2021-04-28 |
Preparation and Performance of Polymer Based on Shale Vanadium Extraction Tailings |
| |
| XU Xianqing,BAO Shenxu,ZHANG Yimin,LUO Yongpeng.Preparation and Performance of Polymer Based on Shale Vanadium Extraction Tailings[J].Bulletin of the Chinese Ceramic Society,2021,40(11):3668-3676. |
| |
| Authors: | XU Xianqing BAO Shenxu ZHANG Yimin LUO Yongpeng |
| |
| Abstract: | In order to use shale vanadium extration tailings (vanadium tailings) as resources, the vanadium tailing was used as the main raw material and the metakaolin was used as an aluminum auxiliary material to prepare geopolymers. The effects of molding method, silicon-aluminum raw material ratio, alkali activator type, alkali activator dosage and molding pressure on the compressive strength of geopolymer samples were investigated. The test results show that the best conditions for the preparation of geopolymers: the quality ratio of raw materials (tailings/metakaolin) is 11:9, the mass fraction of NaOH alkali activator is 10%, the water-solid ratio is 0.18, and the molding pressure is 20 MPa. The compressive strength of the geopolymer after curing for 14 d reaches 58.25 MPa. The geopolymer samples were detected and characterized by XRD, FTIR, TG-DSC, SEM and pore size analysis. The results show that the main products of the geopolymerization reaction are amorphous silica-alumina gel and a small amount of sodium zeolite. Amorphous silica-alumina gel can improve the pore structure of samples and enhance the density of the microstructure of samples, resulting the increase of compressive strength of samples in macroscopic scale. |
| |
| Keywords: | shale vanadium extraction tailing geopolymer alkali activation compressive strength compression moulding pore structure |
|
| 点击此处可从《硅酸盐通报》浏览原始摘要信息 |
|
点击此处可从《硅酸盐通报》下载全文 |
|
