摘要
为了减少废催化剂中有价金属的浪费,实现资源的有效回收与利用,采用碱-酸联合浸出法对废加氢催化剂中的有价金属进行回收。考察了浸出时间、浸出温度、碳酸钠浓度和液固比等对有价金属溶出行为的影响规律。结果表明,最佳浸出条件为反应时间2 h、浸出温度80℃、碳酸钠浓度150 g/L、固液比1:8时,钼的浸出率94.57%,钒的浸出率为93.21%;浸出时间60 min,硫酸浓度3 mol/L,温度70℃,固液比1:8时,镍的浸出率为94.16%,铝的浸出率为23.43%。废加氢催化剂经过碱-酸联合浸出工艺,有价金属钼、钒、铝和镍的总浸出率分别达到96.45%,95.37%,23.43%和94.16%。
In order to reduce the waste of valuable metals in the spent catalyst and realize the effective recovery and utilization of resources,the alkali-acid combined leaching method was adopted to recover the valuable metals in the spent hydrogenation catalyst.The effects of leaching time,leaching temperature,sodium carbonate concentration and liquid-solid ratio on the leaching behavior of valuable metals were investigated.The results show that the optimal leaching conditions are reaction time of 2 h,leaching temperature of 80℃,sodium carbonate concentration of 150 g/L and solid-liquid ratio of 1:8.At this time,the leaching rate of molybdenum is 94.57%and that of vanadium is 93.21%;When the leaching time is 60 min,the sulfuric acid concentration is 3 mol/L,the temperature is 70℃and the solid-liquid ratio is 1:8,the leaching rate of nickel is 94.16%and that of aluminum is 23.43%.After the spent hydrogenation catalyst undergoes an alkali-acid combined leaching process,the valuable metals’total leaching rate of molybdenum,vanadium,aluminum and nickel reaches 96.45%,95.37%,23.43%and 94.16%,respectively.
作者
李连地
黄裕娥
纪丁愈
李云祯
邹渝
LI Liandi;HUANG Yu′e;JI Dingyu;LI Yunzhen;ZOU Yu(Engineering Training Center,Nanjing Polytechnic Institute,Nanjing 210048,China;School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China;Sichuan Academy of Environmental Sciences,Chengdu 610041,China;SichuanWater Conservancy Vocational College,Chongzhou 611231,China)
出处
《粉末冶金工业》
CAS
北大核心
2022年第6期139-144,156,共7页
Powder Metallurgy Industry
基金
南京科技职业学院科研项目(NJPI-2021-05)。
关键词
废催化剂
焙烧
碱浸
回收
有价金属
spent catalyst
roasting
alkaline leaching
recycling
valuable metal
