无焙烧钛白废酸氧压浸出转炉钒渣研究

采用无焙烧直接加压酸浸工艺，以钛白废酸为浸出剂，转炉钒渣为原料进行浸出提钒实验研究.热力学分析表明:可溶性含钒离子在酸性溶液中能够稳定存在.根据浸出实验得出:初始酸浓度是影响酸浸过程的重要因素，在初始酸质量浓度为250g·L-1，反应温度150℃，反应时间40min，液固比12∶1，氧分压02MPa的条件下，钒的浸出率为9851%.不同条件下的浸出渣XRD图谱表明:在钒浸出率增大的过程中，含钒尖晶石相逐渐消失，钛铁矿相发生转化形成锐钛矿相在浸出渣中富集.

Oxygen Pressure Leaching of Converter Vanadium Slag by Titanium Dioxide Waste Without Roasting

The process of oxygen pressure leaching of converter vanadium slag with titanium dioxide waste without roasting was researched. Thermodynamic analysis indicates that: soluble vanadium ions are stable in the acid solution. Leaching experiments show that the initial acid concentration is the most important factor in the leaching process. Under the conditions: leaching temperature 150℃， leaching time 40min， liquid to solid ratio 12∶1(ml·g-1)， initial acid concentration 250g·L-1， oxygen pressure 02MPa， the vanadium leaching rate is 9851%. The XRD patterns of leaching residues under different conditions show that with the increase of vanadium leaching rate， the vanadium spinel phase is gradually disappeared and ilmenite phase is transformed into anatase phase in the leaching residue.