Crystallization of Potassium Calcium Silicate from Modified Industrial EAF Slag

Kolawole Bankole Lateef; S.A. Rezan Sheikh Abdul Hamid; Mohd Sharif Nurulakmal

doi:10.4028/www.scientific.net/AMR.620.66

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 620Crystallization of Potassium Calcium Silicate from...

Crystallization of Potassium Calcium Silicate from Modified Industrial EAF Slag

Abstract:

Potassium Calcium Silicate (K₂CaSiO₄) is a mineral that has been of high interest in the field of applied mineralogy. Crystallization of K₂CaSiO₄from high chromium EAF slag was studied and the slag samples were characterized using XRF, XRD, SEM/EDX, FTIR and TG/DTA. The distinct mineral phases in the EAF slag were neutralized and formed with a grain boundary by air cooling and dispersed phases by water cooling. The EDX revealed that both the grain boundary and matrix phases are composed of potassium, calcium and silicon. The addition of K₂CO₃ to EAF slag not only imparts the needed potassium but also reduced the heavy metal present in the slag as revealed by the XRF analysis. Using thermodynamic modeling, it is deduced that the percentage of potassium silicate formed during simulation process (when) increases as the basicity of EAF slag decrease.

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Periodical:

Advanced Materials Research (Volume 620)

Pages:

66-71

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.620.66

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Online since:

December 2012

Authors:

Kolawole Bankole Lateef, S.A. Rezan Sheikh Abdul Hamid, Mohd Sharif Nurulakmal

Keywords:

Characterization, Crystallization, EAF Slag, Fertilizer, Potassium Calcium Silicate

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