China Nonferrous Metallurgy

Centrifugal extraction method is an extraction method that enhances mass transfer between two phases through high-speed rotation and utilizes centrifugal force field to achieve two phase separation quickly. To improve the vanadium extraction efficiency and the separation factor of vanadium （V）and iron, the centrifugal extraction method was applied to the study of vanadium purification and enrichment process from black shale acid leaching solution. Under centrifugal extraction conditions with an initial pH value of 2.0, organic phase composition of 15 vol.% P204+85 vol.% sulfonated kerosene, phase ratio（O/A）of 1∶4, extraction time of 4 min, extraction temperature of 45℃, and stirring speed of 1400r/min, the V extraction efficiency was 87.67%. Compared with the conventional extraction, the separation factor of V/Fe increased from 41.78 to 127, and the extraction saturation capacity of vanadium increased from 52.63g/L to 70.45g/L, indicating that centrifugal extraction method can effectively enhance the separation effect of vanadium and iron, and improve the extraction saturation capacity of vanadium.