Experimental Study on Ultrasonic-assisted Extraction of Vanadium and Chromium from High Chromium Vanadium Slag

In this paper,the leaching behavior of vanadium and chromium was studied by ultrasonic assisted leaching,and the optimum process parameters were obtained.The effects of ultrasonic power,leaching medium concentration,liquid-solid ratio,leaching temperature and leaching time on vanadium-chromium leaching were studied in detail. The results showed that the leaching rate of vanadium was the highest when the ultrasonic power was 560 W,the concentration of leaching medium was 10%,the ratio of liquid to solid was 7,the leaching temperature was 60 ℃ and the leaching time was 20 min,and the chromium leaching rate was the smallest,achieving the efficient extraction of vanadium and the separation of vanadium and chromium.For vanadium leaching rate,the ultrasonic power has the greatest effect on the leaching rate of vanadium,followed by liquid-solid ratio,acid concentration and leaching time. Leaching temperature has the least effect on vanadium leaching rate.For the leaching rate of chromium,the leaching rate of chromium was less than 1%,and the ultrasonic power had the least effect on the leaching rate of vanadium,and the acid concentration had the greatest effect on the leaching rate of chromium.