| 초록 |
Ferronickel slag is a by-product obtained for the production of Ferronickel alloy. It is composed of Silica, Magnesium Oxide, Iron Oxide and heavy metals. Due to lack of process research method almost of Ferronickel slags wasted of mainly buried at landfill, despite it can be used as a valuable product. The present study establishes a suitable approach to extract valuable components from the slag. Initially SA(sulfuric acid) was used to leach MgO from the slag. In order to establish the optimum conditions suitable for separating oxides from the slag, the leaching process was carried out at different molar concentrations of SA(2-8M), leaching time (2-8h), and temperatures (30-80°C). X-ray fluorescence, X-ray diffraction and scanning electron microscopy analysis were performed to monitor the effectiveness of leaching in the slag. It was observed that leaching of Mg and Fe, and Al oxides increased significantly with increasing molar concentration of the acids from 2 to 8M. However, the optimum conditions of the leaching process were at a molar concentration, temperature and leaching time of 6M, 80°C, 6 h, respectively. |
