废SCR脱硝催化剂碱式焙烧—水浸提取钒和钨  

Extraction of Vanadium and Tungsten from Waste SCR Denitrification Catalyst by Alkaline Roasting and Water Leaching Process

作　　者：俞子铉 李奇勇 李强[2,3] 刘云龙[2] 罗微 陈茜 YU Zixuan;LI Qiyong;LI Qiang;LIU Yunlong;LUO Wei;CHEN Qian(College of Chemical Engineering,Fuzhou University,Fuzhou 350108,China;College of Resources and Chemical Engineering,Sanming University,Sanming 365004,Fujian,China;Cleaner Production Technology Engineering Research Center of Fujian Universities,Sanming 365004,Fujian,China)

机构地区：[1]福州大学化工学院,福州350108 [2]三明学院资源与化工学院,福建三明365004 [3]清洁生产技术福建省高校工程研究中心,福建三明365004

出　　处：《有色金属(冶炼部分)》2025年第2期140-146,共7页Nonferrous Metals(Extractive Metallurgy)

基　　金：福建省科技厅引导性项目(2022Y0075);三明市引导性科技项目(2023-S-1);闽江源生态保护研究院培育项目(MJ2021001)。

摘　　要：利用碱式焙烧—水浸工艺提取废SCR脱硝催化剂中的钒和钨,以便后续钒和钨的资源化利用。探究了焙烧温度、焙烧时间、Na_(2)CO_(3)与废催化剂的质量比、水浸温度、水浸时间等对钒和钨浸出效果的影响,结合焙烧产物XRD分析探究其焙烧机理。结果表明,废SCR脱硝催化剂合适的碱式焙烧—水浸条件为:焙烧温度875℃、焙烧时间1.5 h、Na_(2)CO_(3)与废催化剂的质量比1∶1、水浸温度80℃、水浸时间2 h,在此条件下钒和钨的浸出率分别达到91.33%和96.34%。根据XRD分析结果,在碱式焙烧过程中钒和钨分别转化为易溶性的NaV6O15和Na2WO4;经过碱式焙烧—水浸处理后,90%以上的钒和钨进入水浸液,而进入水浸液中的钛不足2%。The alkaline roasting and water leaching process was used to extract vanadium and tungsten from the waste SCR denitrification catalyst for the subsequent resource utilization of vanadium and tungsten.The effects of roasting temperature,roasting time,mass ratio of Na2CO3 to waste catalyst,water leaching temperature,and water leaching time on the leaching effect of vanadium and tungsten were investigated.The roasting mechanism was explored by XRD analysis of roasting products.The experimental results show that the suitable alkaline roasting and water leaching conditions for the waste SCR denitrification catalyst include roasting temperature 875℃,roasting time 1.5 hours,mass ratio of Na2CO3 to waste catalyst 1∶1,water leaching temperature 80℃,and water leaching time 2 h.Under these conditions,the leaching rate of vanadium and tungsten is 91.33%and 96.34%respectively.According to the results of XRD analysis,vanadium and tungsten are converted into easily soluble NaV_(6)O_(15)and Na_(2)WO_(4)respectively during the alkaline roasting process.After alkaline roasting and water leaching treatment,more than 90%of vanadium and tungsten enters the water leaching solution,while less than 2%of titanium enters the water leaching solution.

关 键 词：废SCR脱硝催化剂 碱式焙烧 水浸 钒 钨 浸出率 

分 类 号：TF111.31[冶金工程—冶金物理化学] TF841