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材料导报  2021, Vol. 35 Issue (13): 13018-13024    https://doi.org/10.11896/cldb.20070206
  材料与可持续发展(四)一材料再制造与废弃物料资源化利用* |
钨尾矿机械-化学活化及其与水泥水化反应机理
匡敬忠*, 朱陆平, 司加保, 黄哲誉, 原伟泉, 邹志磊, 邱廷省
江西理工大学资源与环境工程学院,赣州 341000
Mechanochemistry Activation for Tungsten Tailings and Hydration Reaction Mechanism with Cement
KUANG Jingzhong*, ZHU Luping, SI Jiabao, HUANG Zheyu, YUAN Weiquan, ZOU Zhilei, QIU Tingsheng
Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
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摘要 矿制备辅助胶凝材料是实现尾矿大规模资源化利用的重要途径。本工作研究了机械-化学活化对钨尾矿颗粒粒径和比表面积的影响,探究了不同活化方式、活化剂种类对钨尾矿制备胶砂试块机械强度的影响,通过XRD、SEM、IR对水化产物的物相及微观结构进行表征。结果表明,机械-化学活化能有效降低颗粒平均粒径并增加胶砂试块的活性指数,活化效果最佳的是三元复合活化剂,其次是二元复合活化剂,效果较弱的是单一活化剂。采用H1、C1和G1三元复合活化剂活化钨尾矿后,直径小于10 μm的钨尾矿颗粒达到了70.07%,制备的胶砂试块活性指数达88.11%。机械-化学活化的本质是通过破坏矿物表面结构,增加其表面无序物质和振动能,使得水化产物中生成大量六方板状Ca(OH)2,最终形成大颗粒的C-S-H凝胶和钙矾石。
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匡敬忠
朱陆平
司加保
黄哲誉
原伟泉
邹志磊
邱廷省
关键词:  钨尾矿  机械-化学  水化反应  活化  活性指数    
Abstract: The preparation of auxiliary cementitious materials for tailings is an important way to realize the complete resource utilization of tailings. The effects of mechanochemical activation on particle size and specific surface area of tungsten tailings were studied, the effects of different activation methods and activator types on the mechanical strength of mortar test block prepared by tungsten tailings were studied, and the phase and microstructure of the products were characterized by XRD, SEM and IR. The results show that, the mechanical chemical activation can effectively reduce the average particle size and increase the activity index of the mortar block, the optimal formula is ternary composite activator, followed by binary composite activator, and the weakest is single activator. After activation of tungsten tailings by the ternary composite activators of H1, C1 and G1, the results show that the tailings with diameter less than 10 μm can reach 70.07% and the activity index of mortar test block can reach 88.11%. The essence of mechanochemical activation is to destroy the crystal structure of tailings and increase its indicative disordered substances and vibration energy, a large number of six side plate Ca(OH)2 were formed in the hydration products, and finally formed C-S-H gel and ettringite with large particle size.
Key words:  tungsten tailings    mechanochemistry    hydration reaction    activation    activity index
               出版日期:  2021-07-10      发布日期:  2021-07-14
ZTFLH:  X751  
基金资助: 国家重点研发计划(2018YFC1903403)
作者简介:  匡敬忠,江西理工大学,教授,博士研究生导师。主要从事矿物材料、矿物分选理论与工艺和二次资源综合利用方面的研究。主持重点研发计划课题1项,主持和承担国家自然科学基金项目4项,参与国家科技支撑计划课题3项,省部级等各类纵向科研项目30余项,在国内外学术期刊发表论文60余篇,授权发明专利6项。
引用本文:    
匡敬忠, 朱陆平, 司加保, 黄哲誉, 原伟泉, 邹志磊, 邱廷省. 钨尾矿机械-化学活化及其与水泥水化反应机理[J]. 材料导报, 2021, 35(13): 13018-13024.
KUANG Jingzhong, ZHU Luping, SI Jiabao, HUANG Zheyu, YUAN Weiquan, ZOU Zhilei, QIU Tingsheng. Mechanochemistry Activation for Tungsten Tailings and Hydration Reaction Mechanism with Cement. Materials Reports, 2021, 35(13): 13018-13024.
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http://www.mater-rep.com/CN/10.11896/cldb.20070206  或          http://www.mater-rep.com/CN/Y2021/V35/I13/13018
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