Abstract
Titanium alloy grinding scraps (TAGS) have a production of 30 thousand tons annually. They contain large titanium resources as by-product from the titanium alloy machining process. TAGS cannot be sent back directly to the vacuum smelting process due to its high-content of impurities such as the grinding wheel ash and titanium oxides. In this study, a process of Electrostatic Separation-Oxidative Roasting-Acid Leaching was applied to separate and recover titanium from TAGS. The results indicate that 76.61% titanium could be recovered during electrostatic separation process under the optimal conditions. The final product of TAGS containing 91.44% titanium dioxide was obtained after optimized physical separation, oxidative roasting followed by hydrochloric acid leaching process. The product meets the requirements for feed raw materials required to prepare the industrial titanium dioxide. It was found that aluminum was the major impurity in the titanium-based product in the form of corundum.
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Cheng, X., Xu, S., Su, Z., Zhang, Y. (2023). Selective Separation and Recovery of Titanium from Titanium Alloy Grinding Scrap Via the Electrostatic Separation-Oxidative Roasting-Acid Leaching Process. In: Reddy, R.G., et al. New Directions in Mineral Processing, Extractive Metallurgy, Recycling and Waste Minimization. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22765-3_19
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DOI: https://doi.org/10.1007/978-3-031-22765-3_19
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