Need of Reactivation by Fusion

6 Major Findings of the Three-Step Activation Technique 

As a result of hardening of these layers, further fusion of the residual fly ash with the molten NaOH would get restricted. This drawback of the conventional fusion process still remains unattended. In this situation, grinding of a fused residue manually is warranted to break the SSL and SAL and ascertain their mixing with the residual fly ash, before the second and third steps of the fusion. To investigate the extent of fusion of the RFA, the characterization (viz., physico-chemico-mineralogical, morphological) of aU the residues was also essentially conducted. 

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