钨尾矿机械-化学活化及其与水泥水化反应机理

doi:10.11896/cldb.20070206

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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

Published: 14 July 2021

CLC number:

X751

Fund:This work was financially supported by the National Key Research and Development Program of China(2018YFC1903403).

About author:: Jingzhong Kuang, professor and doctoral supervisor of Jiangxi University of Technology. Mainly engaged in mineral materials, mineral separation theory and technology and comprehensive utilization of secondary resources. He has presided over one key research and development project, four National Natural Science Foundation projects, three national science and technology support projects, more than 30 provincial and ministe-rial level vertical research projects, published more than 60 papers in domestic and foreign academic journals, and authorized 6 invention patents.

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	KUANG Jingzhong
	ZHU Luping
	SI Jiabao
	HUANG Zheyu
	YUAN Weiquan
	ZOU Zhilei
	QIU Tingsheng

Cite this article:

KUANG Jingzhong,ZHU Luping,SI Jiabao, et al. Mechanochemistry Activation for Tungsten Tailings and Hydration Reaction Mechanism with Cement[J]. Materials Reports, 2021, 35(13): 13018-13024.

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http://www.mater-rep.com/EN/10.11896/cldb.20070206 OR http://www.mater-rep.com/EN/Y2021/V35/I13/13018

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