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针对现行钒渣焙烧工艺中存在的钒渣高温物理热的浪费问题,提出“熔融钒渣直接氧化钠化提钒”新工艺。在现行工艺基础上,对新工艺进行了热力学和动力学的计算与分析,最后进行了新工艺的实验室模拟试验。研究结果表明:新工艺条件下,钒渣在反应过程中热量充足会保持良好的熔融状态;新工艺的动力学条件明显优越于现行工艺;实验室试验结果验证了新工艺的可行性,在供氧充足,Na2CO3用量为20%～30%的条件下,钒渣氧化率约为90%,钒浸出率在82%以上。
In view of the current waste of high temperature physical heat of vanadium slag existing in the vanadium slag roasting process, a new process of “vanadium slag direct vanadium leaching vanadium” was proposed. Based on the current technology, thermodynamic and kinetic calculation and analysis of the new technology were carried out. Finally, a laboratory simulation test of the new technology was carried out. The results show that: under the new process conditions, the vanadium slag will keep a good state of heat during the reaction; the dynamic conditions of the new process are obviously superior to the current process; the laboratory test results verify the feasibility of the new process, Oxygen sufficient, Na2CO3 dosage of 20% to 30% of the conditions, vanadium slag oxidation rate of about 90%, vanadium leaching rate of 82% or more.