Effect of F-S Mineralizer on Calcining Raw Materials with High Quartz Content

Abstract

Abstract: The all-components of waste concrete used in cement production can improve the utilization rate of construction waste, however, the quartz will be brought in raw material inevitably, and the burnability of raw material and the quality of clinkers can be affected. Different proportions of F-S mineralizer (m(F)/m(SO₃)=0.4) were mixed in raw material in the experiment, the effect of F-S mineralizer on clinker property and burnability of raw material whose silicon materials were quartz sand was studied. The results show that while the F-S mineralizer is added in the raw material, the burnability of raw material is improved, it also lowers the temperature of liquid phase appeared and crystallization of C₃S, hydration products of clinker is more compacted and compressive strength is higher than raw material. When the mass content of CaF₂ of F-S mineralizer increases from 0.5% to 1.5%, the long slenderness ratio of C₃S crystal becomes smaller, and the compressive strength of hydrated clinker decreases slightly.

Key words: waste concrete, quartz, raw material, F-S mineralizer, calcination, hydration

CLC Number:

TQ172

MAHESHATI Hansuoertan, LU Puguang, AI Hongmei. Effect of F-S Mineralizer on Calcining Raw Materials with High Quartz Content[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(9): 2884-2890.

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