Kinetics of Calcium Leaching from Particulate Steelmaking Slag in Acetic Acid Solution

In order to reduce CO2 emission, the sequestration using particulate steelmaking slag in water is world widely being studied through a Ca-carbonation method. As consequence, improved efficiency of Ca leaching from steelmaking-slag particles contributes significantly increasing amount fixed CO2. Therefore, this study, for purpose understanding particles, rate week acidic solution was analyzed by several kinetics models such as shrinking core model and logarithmic law. addition Ca, Fe which one major elements also investigated. The process with stirring could be fitted well Moreover, observation SEM-EDX, it observed that residue after acetic acid porous material pores blocked. From these results, revealed mass transfer products blocking pore surface very likely rate-controlling step leaching. fact, promoting ultrasonic irradiation enhance remarkably. While ratio reaches 56.6% at 300 min without irradiation, 57.3% just 30 irradiation. This study reveals important