Rheological Properties of Phosphorus Tailings-cement-microsilica Mixed Slurry

doi:10.19691/j.cnki.1004-4493.2025.01.006

China's Refractories ›› 2025, Vol. 34 ›› Issue (1): 43-50.DOI: 10.19691/j.cnki.1004-4493.2025.01.006

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Rheological Properties of Phosphorus Tailings-cement-microsilica Mixed Slurry

WANG Xiujuan^{1, 2}, WEI Yaowu^{1, 2*}, WANG Jingran^{1, 2}, HE Junming^{1, 2}, ZHANG Jin³, YOU Dahai³

1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2 International Joint Laboratory on New Technologies of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
3 Hubei Institute of Metallurgical Geology (Central South Institute of Metallurgical Geology), Yichang 443000, China

Online:2025-03-15 Published:2025-03-27
Contact: *e-mail: weiyaowu@wust.edu.cn
About author:Wang Xiujuan, born in 1999, is a PhD candidate in Materials Science and Engineering at Wuhan University of Science and Technology. Her research fields are solid waste utilization, preparation of foam concrete, and porous thermal insulation materials.

Abstract

Abstract: Utilizing phosphorus tailings as the raw material for foam concrete is a key approach to achieving sustainable and efficient resource utilization. During the preparation of phosphorus tailings-based foam concrete, slurry performance is critical to the successful production. Phosphorus tailings, cement and microsilica were used to prepare foam concrete slurry in this study. A rheometer was employed as a test tool to measure the variation of linear viscoelastic zone (LVR), viscosity, and yield stress of the slurries with different cement contents. The results indicate that the phosphorus tailings-cement-microsilica slurry exhibits shear-thinning properties, which aligns well with the Herschel-Bulkley model, showing a high degree of correlation. As the cement content increases, the energy storage modulus of the slurry rises, and the LVR length shows a nonlinear trend. The LVR reaches its maximum length of 0.04% when the cement content is 6 mass% or 8 mass%. The increment of the cement content leads to a more intricate internal network structure, which hinders the reconstruction rate of the flocculated structure after high-shear deformation.

Key words: phosphorus tailings, slurry, rheology, thixotropy

WANG Xiujuan, WEI Yaowu, WANG Jingran, HE Junming, ZHANG Jin, YOU Dahai. Rheological Properties of Phosphorus Tailings-cement-microsilica Mixed Slurry[J]. China's Refractories, 2025, 34(1): 43-50.

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Rheological Properties of Phosphorus Tailings-cement-microsilica Mixed Slurry

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