Hydrometallurgical process, which is one of the recycling method of EAFD in zinc, is a process to recover metallic crystal form that deposited on the cathod through electrolytic extraction by leaching valuable metals in appropriate solvent. Still, there is a lot of variable at electrowinning process, such as initial pH, space between electrode, voltage, current, cathod, or anode, Thus, many studies have been conducted previously. In this study, the consideration of optimistic condition in electrowinning process to recover the valuable metal in EAFD have been carried. The extraction amount by changing pH shows increase according to high initial pH, also, the alteration of extraction amount by controling the space between electrode, voltage or current has been measured. The difference of efficiency represent by decrease of electromotive force, sudden loss of voltage under specific condition, and using platinum as electrode shows most stable extraction. Furthermore, when distance between electrode are too close, the extracted zinc contact with anode, which make recovery difficult. The analysis result of zinc metallic crystal which been recovered draws spherical and cylindrical shapes are scattered and mixed, and consequence of EDX, content of zinc appear about 60%.

• Dea Hyun Moon(Department of Environmental Energy Engineering, Kyonggi University)
• Jae Hoon Jeung(Department of Environmental Energy Engineering, Kyonggi University)
• Sung Soo Kim(Department of Environmental Energy Engineering, Kyonggi University)
• Soon Woong Chang(Department of Environmental Energy Engineering, Kyonggi University)