石煤脱硅渣中钒的浸出动力学.doc

石煤脱硅渣中钒的浸出动力学.doc2012年6期 有色金属(冶炼部分)(http：//ysyL b?rimm. cn) • 1 •
doi： 10. 3969/j・ issn. 1007-7545. 2012. 06. 001
石煤脱硅渣中锐的浸出动力学
张国范，闫继武，刘琨，龙思思
(中南大学资源加工与生物工程学院，长沙410083)
摘要：以石煤熔融水淬肩碱浸脱硅渣为原料，采用液固多相反应的缩芯模別研究了石煤脱硅渣中帆的浸 出动力学••结果表明•脱硅渣的浸出分为两个阶段： 反应刚开始时的快速浸出阶段和2 min之后的缓慢浸出阶段，这商个阶段均受固膜扩散控制■反应活化 能为 13. 88 kJ/moL
关綾词：石煤脱硅进；锐；酸浸；动力学
中图分类号：TF841. 3 文献标识码：A 文章编号：1007-7545(2012)06-0001-04
Leaching Kinetics of Vanadium from Desiliconization
Slag of Stone Coal
ZHANG Guo-fan, YAN Ji-wu, LIU Kun, LONG Si-si
(School of Minerals Processing and Bioengineering* Centra) South University♦ Changsha 410083• China)
Abstract-The leaching kinetic of vanadium was studied with the shrinking core model of liquid-solid multiphase reaction with the use of desiliconization slag of stone coal leached by alkali after melting and water quenching as raw material. The effects of leaching temperature and initial concentration of vitriolic acid on vanadium leaching rate were investigated. The results show that there are two stages in the leaching process, i. e. the quick leaching stage at the beginning of reaction and the slow leaching stage after 2 minutes. The kinetics of leaching in both the stages is controlled by diffusion through solid product layer, and the reaction activation energy is 13. 88 kJ/mol.
Key words:desiliconization slag of stone coal