Study on Separation Performance of V （Ⅳ） and Fe （Ⅲ） by P204 in Sulfuric Acid Extraction System

Aiming at the shortcomings of high energy consumption,heavy pollution and low recovery rate for the traditional vanadium production technologies,a new process for vanadium extraction by acid leaching using the waste acid in titanium white production under the pressure without roasting was proposed.In this paper,the leaching solution was taken as the research object. Component area map,orthogonal tests and single factor tests had been used to research the separation performance of V （Ⅳ） and Fe （Ⅲ） in P204 sulfuric acid extraction system.The experimental results show that V （Ⅳ） and Fe （Ⅲ） respectively exist in the main form of VO²⁺and Fe³⁺in aqueous solution when the pH is less than 2,and the phase ratio （O/A） is an important factor affecting the extraction rates of V （Ⅳ） and Fe （Ⅲ）.At the optimum extraction conditions of 30% P204+10% TBP +60% sulfonated kerosene for organic phase composition,extraction temperature T = 30 ℃,shaking for 8 min,1. 6 for the initial aqueous phase pH and phase ratio （O/A） = 3,the extraction rates of V （Ⅳ） and Fe （Ⅲ） are respectively 61.16% and 18.87%,with the separation factor of V （Ⅳ） and Fe （Ⅲ） at 6.67.