响应面法优化电炉炼钢粉尘中Zn的选择性浸出.pdfVIP

Trans. Nonferrous Met. Soc. China 25(2015) 2753−2762 Optimization of selective leaching of Zn from electric arc furnace steelmaking dust using response surface methodology Mehmet KUL, Kürşad Oğuz OSKAY, Mehmet ŞİMŞİR, Halit SÜBÜTAY, Habip KIRGEZEN Department of Metallurgical and Materials Engineering, Engineering Faculty, Cumhuriyet University, Sivas 58140, Turkey Received 2 October 2014; accepted 20 January 2015 Abstract: The aim of this work is to investigate and optimize the effects of the leaching parameters on the selective leaching of zinc from electric arc furnace steelmaking dust (EAFD). The response surface method was applied on the basis of a three-level Box–Behnken experimental design method for optimization of selective leaching parameters of zinc from EAFD. The leaching recoveries of zinc (Y ) and iron (Y ) were taken as the response variables, where the concentration of sulphuric acid (X , mol/L), Zn Fe 1 leaching temperature (X , °C), leaching time (X , min), and liquid/solid ratio (X , mL/g) were considered as the independent variables 2 3 4 (factors). The mathematical model was proposed. Statistical ANOVA analysis and confirmation tests were applied. A maximum of 79.09% of zinc was recovered while the minimum iron recovery was 4.08% under the optimum conditions of leaching time 56.42 min, H2SO4 concentration 2.35 mol/L, leaching temperature 25 °C and liquid/solid ratios.