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配合从高Ca含钒钢渣中提钒工作,进行了Ca(VO_3)_2和NaCaVO_4在Na_2CO_3-NaHCO_3缓冲溶液中钒浸取动力学研究。实验结果表明,这两种含钙的钒酸盐的浸取动力学行为不同。Ca(VO_3)_2的浸取速率受与Na_2CO_3和NaHCO_3的平行反应控制;NaCaVO_4在所实验的范围内不与Na_2CO_3反应,而与NaHCO_3反应的浸取速率的控制步骤是HCO_3~-离子在NaCaVO_4固体表面上的化学吸附。
In combination with vanadium extraction from high Ca-containing vanadium slag, kinetics of vanadium leaching from Ca (VO_3) _2 and NaCaVO_4 in Na_2CO_3-NaHCO_3 buffer solution was studied. The experimental results show that the kinetics of the leaching kinetics of the two calcium-containing vanadates are different. The leaching rate of Ca (VO_3) _2 was controlled by the parallel reaction with Na_2CO_3 and NaHCO_3. NaCaVO_4 did not react with Na_2CO_3 in the experimental range. The control of the leaching rate with NaHCO_3 was that HCO_3 ~ Surface chemisorption.