Leaching of Effective States of Cu and Cr from Vanadium-Titanium Magnetite Tailings by Different Leaching Agents
In order to study the extraction effect of different extractants on heavy metals in vanadium-titanium magnetite tailings,five extractants were selected to extract available Cu and Cr from tailings under different oscillation time,and the extraction efficiency was compared.The results showed that the extraction rate of Cu was EDTA-2na>DTPA>HAC-NAAC>MgCl2>CaCl2,and the extraction rate of Cr was EDTA-2na>HAC-.The leaching amount of Cu by HAc-NaAc buffer solution,EDTA-2Na solution and DTPA solution increased significantly with the decrease of particle size.In the experimental time range,the leaching of Cr by EDTA-2Na solution and HAc-NaAc buffer solution reached the equilibrium state of Cr ion adsorption in leaching solution within 90min.It is considered that EDTA-2Na is the most suitable leaching agent for extracting effective heavy metals Cu and Cr from vanadium-titanium magnet tailings.
tailingsLeaching agentTimeParticle sizeheavy metal