废SCR脱硝催化剂碳酸钠焙烧⁃浸出行为及其热力学计算  

Roasting and Leaching Behavior of Spent SCR Denitration Catalyst Using Sodium Carbonate and Its Thermodynamic Calculation

作　　者：卜浩 何名飞 吕昊子 曹苗[4] 夏启斌[5] 高玉德 孟庆波 BU Hao;HE Ming-fei;Lü Hao-zi;CAO Miao;XIA Qi-bin;GAO Yu-de;MENG Qing-bo(Guangdong Institute of Resources Comprehensive Utilization,Guangzhou 510650,Guangdong,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,Guangdong,China;Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources,Guangzhou 510650,Guangdong,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510641,Guangdong,China)

机构地区：[1]广东省资源综合利用研究所,广东广州510650 [2]稀有金属分离与综合利用国家重点实验室,广东广州510650 [3]广东省矿产资源开发和综合利用重点实验室,广东广州510650 [4]中南大学资源加工与生物工程学院,湖南长沙410083 [5]华南理工大学化学与化工学院,广东广州510641

出　　处：《矿冶工程》2020年第5期78-82,87,共6页Mining and Metallurgical Engineering

基　　金：广东省科学院实施创新驱动发展能力建设专项资金(2018GDASCX⁃0935);广东省科技项目(2017B030314046)。

摘　　要：采用碳酸钠熔盐法处理废SCR脱硝催化剂,回收其中有价金属钒、钨,在热力学计算基础上,研究了焙烧温度、碳酸钠加入量、焙烧时间等工艺条件对熔盐反应效果的影响。结果表明,当焙烧温度1000℃、碳酸钠与废催化剂质量比1.2∶1、焙烧时间60 min时,催化剂中钒、钨、钛的氧化物分别转变为Na3VO4、Na2WO4、Na16Ti10O28和少量的Na2TiO3,此时钒和钨的浸出回收率分别达到99.70%和99.48%。The spent SCR catalyst was treated by using carbonate molten salt method to recover the valuable metals of vanadium and tungsten therein.On the basis of thermodynamic calculations,the impacts of processing conditions,including roasting temperature,addition amount of sodium carbonate,roasting time,on the reaction effect in molten salt were studied.The results show that the roasting process at 1000℃for 60 min,with the mass ratio of sodium carbonate to spent catalyst at 1.2∶1,leads to the oxides of vanadium,tungsten and titanium in the catalyst transformed into Na3VO4,Na2WO4,Na16Ti10O28 and a small amount of Na2TiO3,respectively,and the leaching rates of vanadium and tungsten up to 99.70%and 99.48%,respectively.

关 键 词：废SCR脱硝催化剂 碳酸钠 熔盐法 焙烧 钒 钨 浸出 热力学 

分 类 号：X773[环境科学与工程—环境工程]