高铬钒渣空白焙烧超声波辅助浸出钒铬试验研究

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

以高铬钒渣无盐空白焙烧获得的焙烧熟料为原料，通过超声波辅助浸出研究其中钒与铬的浸出行为，并得出较优的工艺参数组合。具体研究了超声功率、浸出介质浓度、液固比、浸出温度和浸出时间对钒铬浸出行为的影响。结果表明，超声功率为560W，浸出介质浓度为10％，液固比为7，浸出温度为60℃和浸出时间为20min时，钒浸出率达到最大值，同时，铬浸出率最小，实现了钒的高效提取与钒铬分离。对钒浸出率来说，超声波功率对钒浸出率影响最大，其次是液固比，酸浓度和浸出时间，浸出温度对钒浸出率影响最小。对铬浸出率来说，空白焙烧超声波辅助浸出下铬浸出率均小于1％，超声波功率对钒浸出率影响最小，而酸浓度对铬浸出率影响最大。

In this paper, the leaching behavior of vanadium and chromium was studied by ultrasonic assis- ted 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 ~C 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 vanadi- um 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 tempera- ture 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 vanadi- um, and the acid concentration had the greatest effect on the leaching rate of chromium.