摘要
以钒铬渣钙化焙烧熟料为原料,探究了浸出pH值、浸出温度、浸出时间和浸出液固比对钒铬渣中钒以及铬、锰、硅、钛、铁组元浸出率(质量分数,下同)的影响.结果表明:在酸浸过程中浸出pH值为2.8、浸出温度为60℃、浸出时间为60 min、浸出液固比为5的条件下,钒浸出率达到87.81％,此时铬、锰、硅、钛、铁浸出率分别为0.44％,23.91％,2.28％,0.23％,0.03％;此外,延长浸出时间、提高浸出温度、适当增大浸出液固比均有利于钒的分离提取.
Abstract
In this paper,using calcined clinker of vanadium-chromium slag as raw material,the effects of leaching pH value,leaching temperature,leaching time,and leaching liquid-solid ratio on the leaching rate ( mass fraction,the same below ) of vanadium,chromium,manganese,silicon,titanium and iron in vanadium-chromium slag were investigated.The results showed that during the acid leaching process,under the conditions of acid leaching pH value 2.8,leaching temperature 60℃,leaching time 60 min and liquid-solid ratio 5,the leaching rate of vanadium reached 87.81％.At this time,the leaching rates of chromium,manganese,silicon,titanium,and iron were 0.44％,23.91％,2.28％,0.23％ and 0.03％,respectively.In addition,extending the leaching time,increasing the leaching temperature,and appropriately increasing the leaching liquid-to-solid ratio are all beneficial to the separation and extraction of vanadium.
维普
万方数据