Application of concurrent grinding in direct aqueous carbonation of magnesium silicates

摘要: Abstract Formation of silica-rich passivation layers formed on the periphery reacting feed particles is one primary obstacles in obtaining high magnesite yields during direct aqueous mineral carbonation peridotites and serpentinites. The disruption layer around partially reacted grains as a result concurrent grinding degree (magnesite yield) was investigated this work. Three types naturally-occurring magnesium silicate feedstocks, dunite, olivine lizardite, well three media, were examined. Discrete size fractions samples, with without carbonated. SEM readily disclosed formation shell rich core carbonation. EDS analysis employed to study elemental composition particles’ core. method confirmed that these removed continuously produced fresh surface available for further reaction. removal shown significantly improve up 600 % increase yield. Among different media used work, zirconia stainless steel resulted similar highest yields, which believed be due combination their densities hardness. findings research showed enhanced could achieved all feedstock need energy intensive pre-treatment steps (e.g. ultrafine heat-activation). Moreover, yield when raw lizardite