Hydrothermal Synthesis and Characterization of Zeolite NaA Based on Combination of Silico-Manganese Slag and Fly Ash

Abstract

Abstract: The high crystallinity of zeolite NaA were prepared by hydrothermal method based on the combination of calcined silico-manganese slag (Si-Mn slag) and fly ash. The influence of n(SiO₂)/n(Al₂O₃), the concentration of NaOH, hydrothermal temperature and hydrothermal time on products were studied by single factor experiment. The results show that the zeolite NaA with good crystallinity and thermal stability can be synthesized at the condition of the mass ratio of calcined silico-manganese slag and fly ash=1∶1, n(SiO₂)/n(Al₂O₃)=2.2, temperature of 90 ℃, alkalinity of 2 mol/L and reaction time of 4 h. Compared with the traditional synthesis of the zeolite NaA with fly ash as raw material, the addition of silico-manganese slag makes it a composite system, providing a new way for the resource utilization of silico-manganese slag.

Key words: resource utilization, silico-manganese slag, fly ash, zeolite NaA, hydrothermal method, porous structure

CLC Number:

TQ424.25

ZHU Siyu, LI Li, LIU Ze, ZHANG Tong, HAN Fenglan, MA Zhenfei, LIU Jiayu. Hydrothermal Synthesis and Characterization of Zeolite NaA Based on Combination of Silico-Manganese Slag and Fly Ash[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(2): 634-639.

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