含钒钢渣中钒在KOH亚熔盐介质中溶出行为  

Dissolution Behavior of Vanadium from Vanadium-bearing Steel Slag in KOH Sub-molten Salt

作　　者：高明磊[1] 陈东辉[1] 李兰杰[1,2] 杜浩[2] 郑诗礼[2] 

机构地区：[1]河北钢铁股份有限公司承德分公司钒钛工程技术研究中心,河北承德067102 [2]中国科学院过程工程研究所,北京100190

出　　处：《过程工程学报》2011年第5期761-766,共6页The Chinese Journal of Process Engineering

摘　　要：对含钒钢渣中的钒在KOH亚熔盐介质中的溶出行为进行了研究,实验考察了反应温度、反应时间及碱渣质量比等因素对溶出过程的影响,并探讨了溶出机理.结果表明,随反应温度、反应时间及碱渣比增加,钒的溶出率增加.KOH亚熔盐溶出含钒钢渣中钒的过程,是分解其中Ca2SiO4,Ca3SiO5,Ca2Fe2O5等固溶钒的物相,生成可溶性钒酸钾及不溶性的Ca(OH)2的过程.并可通过控制浸出液中的KOH浓度避免钢渣中高CaO含量对钒沉淀的影响.反应温度220～240℃、反应时间1h、碱渣质量比为4时,钒浸出率高于90%.与传统焙烧法相比,不仅显著降低了能耗,且提高了溶出效率.The dissolution behavior of vanadium from vanadium-bearing steel slag was studied by decomposing the slag with KOH sub-molten salt.The influential factors of reaction temperature,reaction time and alkali-to-slag ratio were examined for obtaining the optimum reaction conditions of vanadium leaching.And the dissolution process mechanism was also investigated.The experimental results show that the leaching rate of vanadium increased with the three factors.The phases of Ca2SiO4,Ca3SiO5,Ca2Fe2O5 in the slag would disappear,and the soluble K3VO4 and dissoluble Ca（OH）2 would be produced when the steel slag was dissolved by KOH sub-molten salt.The sedimentation effect of CaO to vanadium could be avoided by controlling the concentration of KOH.The leaching rate of vanadium was higher than 90% with the reaction temperature from 220 to 240℃,reaction time at 1 h,and mass ratio of alkli to slag at 4.Compared with traditional high-temperature calcination,the energy consumption of this dissolution process was reduced obviously,and dissolution rate was increased.

关 键 词：含钒钢渣 亚熔盐 KOH 浸出 钒 

分 类 号：TF841.3[冶金工程—有色金属冶金]