COB not roasting per se - but pyrolysis/calcining - separating the Fe (+Co) & S into two separate products (in the absence of oxygen). Again keen to see another operating plant of this (and not just lab testwork)...
COB - processing flowsheet fyi. - floatation > calcine > leach of calcine in autoclave of the (POX) > Cobalt IX/crystalisation
https://www.cobaltblueholdings.com/thackaringa-processing/
Not sure where they mention the leach temps/pressures for COB POX step but do not expect it would reaching the pressures/temps of HPAL of laterite ores.
Perhaps CLA miss the pyrolysis step but I imagine they still share the flotation/POX leach/Cobalt IX/crystalisation steps.
Ann: Further Testwork to Enhance Opuwo Scoping Study, page-428
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