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| Preparation of Geopolymer from Vanadium Tailings and Red Mud by Mixed Calcination |
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Received:October 29, 2019
Revised:November 05, 2019
Accepted:November 06, 2019
Published Online:March 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.04.011 |
| KeyWord:vanadium tailings; red mud; geopolymer; calcination; compressive strength |
| Author | Institution |
| Qin Lei |
武汉理工大学资源与环境工程学院 |
| Bao Shenxu |
武汉理工大学 资源与环境工程学院; 钒资源高效利用湖北省协同创新中心 |
| ZHANG Yi-min |
武汉理工大学 资源与环境工程学院; 钒资源高效利用湖北省协同创新中心 |
| LUO Yong-pen |
武汉理工大学 资源与环境工程学院; 钒资源高效利用湖北省协同创新中心 |
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| Abstract: |
| A large amount of stockpiling vanadium tailings and red mud tends to cause serious threat to environment and need to be solved urgently. Both vanadium tailings and red mud contain silicate and aluminosilcate minerals with potential to be used as raw materials for synthesis of geopolymer. Vanadium tailings and red mud are activated by calcination to prepare geopolymer under action of alkaline activator. The results show that mixed calcination can effectively improve activity of vanadium tailings and red mud and increase compressive strength of geopolymer. When mass ratio of vanadium tailings and red mud is 4︰6, compressive strength of geopolymer at 7 d reaches 32.41 MPa, which meets the requirements of MU30 for ordinary concrete small block. This study provides a method for collaborative utilization of multiple solid wastes. |
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