CAJ | 학술논문

利用本课题组提出的钛白废酸无焙烧加压浸出钒渣提钒的新技术,以 P204为萃取剂从废酸浸出钒渣的浸出液中进行了提钒研究.实验结果表明：采用亚硫酸钠为浸出液预处理还原剂,将浸出液中三价铁还原成二价铁,从而防止三价铁的共萃；常温条件下,当浸出液初始 pH ＝2.5、水相与有机相体积比为1∶3,震荡时间为4 min 时,采用有机相组成为20%P204及10%TBP 协同萃取体系,钒的萃取率可达98.61%以上,钒铁的分离系数可达135.3.
이용본과제조제출적태백폐산무배소가압침출범사제범적신기술,이 P204위췌취제종폐산침출범사적침출액중진행료제범연구.실험결과표명：채용아류산납위침출액예처리환원제,장침출액중삼개철환원성이개철,종이방지삼개철적공췌；상온조건하,당침출액초시 pH ＝2.5、수상여유궤상체적비위1∶3,진탕시간위4 min 시,채용유궤상조성위20%P204급10%TBP 협동췌취체계,범적췌취솔가체98.61%이상,범철적분리계수가체135.3.
In view of a new process of leaching the converter vanadium slags with titanium dioxide waste acid under the pressure without calcination proposed by our research group,V extraction from the solution which using waste acid leaching vanadium slag was studied using P204 as the extraction agent.The results showed that the reduction of ferric iron into ferrous iron by Na2 SO3 as a pretreatment reducing agent prevented ferric irons co-extracted into the leaching liquid.Under the optimal technological condition:at room temperature,leaching solution original pH of 2.5,the volume ratio of the aqueous phase to oil phase of 1 ∶3 and the shaking time of 4 min,the extraction rate of V is more than 98.61 %,and the separation factor between V and Fe is up to 135.3 using the 20%P204 with 10%TBP synergistic extraction system.