To overcome from this problem the COB was subjected to pre-treatment process at 600 C under normal atmospheric conditions. As a result of thermal activation, phase transformation occurs by dehydroxylation of goethite matrix in the raw COB
To overcome from this problem the COB was subjected to pre-treatment process at 600 C under normal atmosphericconditions. As a result of thermal activation, phase transformation occurs by dehydroxylation of goethite matrix in the rawCOB