Leaching of Valuable Elements from the Waste Chromite Ore Processing Residue: A Kinetic Analysis
Xingran Zhang, Gang Li, Jun Wu, Neng Xiong, Xuejun Quan
Abstract
) of 6 h. Under these conditions, the valuable components such as Fe, Al, and Cr were extracted with an ideal leaching efficiency of 94.8, 75.1, and 76%, respectively. The results of the leaching kinetics analysis indicated that the leaching of Fe and Cr from the COPR was controlled by a surface chemical reaction, and the leaching of Al was controlled by diffusion through a product layer. The apparent activation energy of the leaching of Fe, Cr, and Al was calculated to be 23.03, 44.15, and 17.54 kJ/mol, respectively. It is believed that this approach has potential applications for the chromate salt industry because of its advantage of ideal leaching efficiency.
Topics & Concepts
ChromiteLeaching (pedology)Chromate conversion coatingMetallurgySulfuric acidChemistryMineral processingBruciteChromiumMaterials scienceNuclear chemistryEnvironmental scienceSoil scienceMagnesiumSoil waterMetal Extraction and BioleachingChromium effects and bioremediationExtraction and Separation Processes