石煤钒矿直接硫酸浸出工艺扩大试验  

PILOT TEST ON EXTRACTION OF VANADIUM FROM STONE COAL BY DIRECT SULFURIC ACID LEACHING

作　　者：刘大学[1] 厉彦江 常耀超[1] 王云[1] 袁朝新[1] 郭持皓[1] 

机构地区：[1]北京矿冶研究总院,北京100160

出　　处：《矿冶》2013年第4期60-66,共7页Mining And Metallurgy

摘　　要：采用添加助浸剂直接硫酸浸出新工艺,针对某石煤钒矿开展了处理规模为1.2 t/d的扩大试验.结果表明,采用两段浸出,一段浸出为常温,浸出时间1.5h,二段浸出温度为90℃、浸出时间8h,在保持浓硫酸添加量为25％、助浸剂添加量均为2.5％时,钒浸出率稳定在86％左右,浸出效果良好;萃取选用6级萃取、1级洗涤、4级反萃、2级反铁流程,钒萃取率99％以上,反萃率98.6％;主要杂质元素铁、铝的萃取率分别为2％～3％、12％ ～ 15％.Using the new process of direct sulfuric acid leaching with leaching aid, a pilot test on extraction of vanadium from stone coal with the capacity of 1.2t/d was performed. The results showed that under the optimum condition as follows： two stage leaching with the first stage temperature of ambient, leaching time of 1.5 h and the second stage temperature of 90 ~C and leaching time of 8 h, concentrated sulfuric acid addition of 25% , leaching aid addition of 2.5% , a desirable leaching effect can be obtained with the vanadium leaching rate maintaining a- round 86%. As to the solvent extraction circuit, 6 stages of extraction, 1 stage of washing, 4 stages of vanadium stripping and 2 stages of iron stripping were adopted. The extraction rate of vanadium was above 99% and stripping rate 98.6% ; extraction rate of main impurities of iron and aluminum were 2% - 3% and 12% - 15% , respectively.

关 键 词：石煤 钒 硫酸浸出 萃取 扩大试验 

分 类 号：TF111.31[冶金工程—冶金物理化学]