Selective Extraction and Separation Technology of Multiple Key Metals in Vanadium Tailings

Abstract

Through the full wet leaching of multiple components in vanadium tailings using oxalic acid solution, the influences of oxalic acid concentration, leaching time, leaching temperature, and water-to-ore ratio on the leaching rates of valuable elements were examined. The results indicated that under the conditions of a leaching temperature of 150 °C, an oxalic acid concentration of 20%, a reaction duration of 150 min, and a water-to-ore ratio of 10:1, the one-step leaching rates of iron, vanadium, and titanium exceeded 99%. Moreover, the asynchronous extraction of vanadium and titanium resources at temperatures of 160 and 180 °C was realized. This verified the feasibility of the asynchronous extraction process for multiple valuable components from vanadium tailings, providing data support for the clean recycling and utilization of vanadium tailings.

Keywords

vanadium tailings / acid leaching / asynchronous extraction / comprehensive utilization

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