Metal Components (Fe, Al, and Ti) Recovery from Red Mud by Sulfuric Acid Leaching Assisted with Ultrasonic Waves
نویسندگان
چکیده
Abstract—Nowadays the red mud generated from Bayer alumina production process seriously threats the environment and human safety. Therefore, reduction and recycling of red mud is an urgent topic in aluminum industry. In this study, the effects of various parameters, ultrasound power, reaction temperature, leaching time, acid concentration, and solid to liquid ratio on the leaching of Fe, Al, and Ti from red mud have been investigated. The major parameters influencing metal recovery efficiency from red mud were ultrasound power, acid concentration, and reaction temperature. It was found that the proper conditions for recovery of the metal components present in the red mud are ultrasound power of 150W, sulfuric acid concentration of 6N, reaction temperature of 70°C, solid to liquid ratio of 2%, and reaction time of 2 hours, etc. The characterization of the raw red mud, as well as that of the leached residues was carried out by XRD, SEMEDX. The contents of Fe, Al, and Ti dissolved in the acid leachate were analyzed with an ICP.
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A Mineralogical Assessment on Residues after Acidic Leaching of Bauxite Residue (Red Mud) for Titanium Recovery
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