钒泥是钒浸出液在除杂净化过程中产生的一种固体废弃物，具有极高的回收价值。针对钒泥难以高效利用的问题，采用碱浸提钒法进行钒泥中钒的提取，研究了浸出温度、浸出时间和NaOH浓度对提钒效果的影响规律，筛选出最优条件：在反应温度90℃、反应时间2 h、NaOH浓度20wt%、液固比2∶1的条件下，钒浸出率可达99.23%，此时尾渣中V2O5含量仅为0.48wt%。在此基础上，利用现有的富氧碱浸提钒工艺流程，进行钒泥协同钒渣强化提钒研究。在优化条件下，混合尾渣中钒含量为0.68wt%，钒浸出率为92.40%，钒渣提钒效率提高了约6个百分点。此时最佳的协同浸出工艺反应条件为：在反应温度150℃、氧气压力0.5 MPa的富氧碱浸后的浆料稀释至NaOH浓度为25wt%，添加初始钒渣质量10wt%的钒泥，浸出温度90℃，浸出时间1 h。通过对协同提钒过程进行表征，明确钒泥的加入可改变硅相，促进钒渣中钒的高效提取。该工艺可实现钒泥和钒渣中钒的高效协同提取。

Vanadium mud is a kind of solid waste produced in the process of vanadium leach solution decontamination, which has a high recovery value. In this study, to address the problem that vanadium mud is difficult to be utilized in large quantities, vanadium is extracted from vanadium mud by alkaline leaching of vanadium mud. The effects of reaction temperature, reaction time and NaOH concentration on vanadium extraction were investigated. The best conditions were found to be: 90℃, 2 hours, 20wt% NaOH, liquid to solid ratio of 2∶1. Under these conditions, the leaching rate of vanadium reached 99.23%, and the V2O5 content in tailings was only 0.48wt%. On the basis of alkaline leaching of vanadium from vanadium mud, the extracting vanadium from vanadium mud and vanadium slag by alkaline leaching was studied based on the existing process of extracting vanadium from vanadium slag by oxygen-enriched alkaline leaching. Under the optimized conditions, the vanadium content in the mixed slag was 0.68wt%, the leaching rate of vanadium from vanadium mud was 92.40%, and the vanadium extraction effect from the vanadium slag was improved by about 6 percentage points. The optimal conditions for the oxygen-enriched alkaline synergistic leaching process were a temperature of 150℃ and an oxygen pressure of 0.5 MPa.The leaching slurry was diluted to NaOH concentration of 25wt%, with adding the initial vanadium slag quality of 10wt% of the vanadium mud, leaching temperature of 90℃, leaching time of 1 h. Finally, the mechanism behind collaborative vanadium extraction was investigated during the extraction process. It was clear that the addition of vanadium mud can change the silicon phase to promote the efficient extraction of vanadium from vanadium slag. The method can realize the efficient synergistic extraction of vanadium from svanadium mud and vanadium slag.