121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-366
Subject Selective Extraction of Iron and Calcium Elements from Iron-rich Mixed Chloride Solutions
Authors Hee Jung Yang, Eung-ryeol Kim, Seok Won Yoon, Seok Huh, NAM HWI HUR*
Department of Chemistry, Sogang University, Korea
Abstract A novel extraction method for recovering iron and calcium elements from iron-rich mixed chlorides produced by the ilmenite (FeTiO3) chlorination process is developed. The recovery of iron elements from the cyclone dust has gained increasing interest mainly because the dust contains over 80% by weight of iron and a range of metals such as Mn, Mg, Al, Cr, and so on. To extract the iron component selectively, calcium carbonate (CaCO3) was used as a precipitating reagent. The addition of CaCO3 into the mixed chloride solution leads to the formation of iron precipitates, which convert into iron oxide (Fe2O3) by annealing. Other metal residues in the remaining solution were precipitated out by the addition of calcium oxide (CaO). Finally, calcium chloride (CaCl2) was crystallized from the solution. The effects of several experimental variables on the extraction process such as concentration of the chloride solution, amount of calcium additives, and pH were carefully investigated. Oxide products were characterized by X-ray powder diffraction, transmission electron microscopy, inductive coupled plasma atomic emission spectroscopy, UV-visible spectroscopy, and CIE 1931 color space.
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