Highly efficient extraction process for the recovery of Mg ion and Mg compound from ferronickel slag = Highly efficient extraction process for the recovery of Mg ion and Mg compound from ferronickel slag

다국어 초록 (Multilingual Abstract)

In this study we demonstrated a method for the effective leaching of Mg ions and Mg compound of high purity from ferronickel slag, which is a waste product of the Stainless steel production process. Ferronickel slag contains useful components like MgO and SiO₂ in a high amount but the slag is usually simply dumped in sea. Economical extraction of these useful components from the waste slag will not only help us to recover valuable components at low cost but also help to improve environment. We used hydrochloric acid to obtain Mg brine from ferronickel slag, Mg solution and Iron oxide were separated via oxidation process and finally titration was done to obtain MgO through the calcination at 750°C. X-ray fluorescence, Laser Diffraction Method and X-ray diffraction analysis were performed to monitor the effectiveness of leaching in the slag.