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Recovery of Valuable Metals from Spent Hydrogenation Catalysts  
Recovery of Valuable Metals from Spent Hydrogenation Catalysts
资料类型: PDF文件
关键词: spent  catalyst  tungsten  nickel  aluminum  recovery  
资料大小: 219K
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简介:
Therecoverymethodandprocessoftungsten,nickelandaluminumfromspentcatalystwasinvestigated,whichhadrealizedthecomprehensiverecoveryofvaluablemetalsabouttungsten,nickelandaluminum.Throughtheroastingandwaterleachingexperiments,effectofadditionNa2C03.roastingtemperatureandtime,waterleachingliquidsolidratio,temperatureandtimeontheleachingofW03wereinvestigated.TheresultsshowedthatadditionNa2C03was6timesthantheoreticalamountofW03,themixturewassodiumroastedunder7500Cfor4h,waterleachingunder900Cfor2h,liquidsolidratioofl:4wastheoptimalexperimentcondition.Undertheoptimalexperimentcondition,leachingrateofW03wasabove95%andtherecoveryofW03was90.85%.atthesametime,partofaluminumcanberecovered.Throughacidleachingexperimentsofnickelandaluminum,theoptimalleachingconditionsofextractionofnickelandaluminumwasinvestigated.Theresultsshowedthatundertheconditionofsulfuricacidconcentrationof30%(massfraction).andsolid-liquidrati01:8.under850Cfor4h,nickelandaluminumleachingratewere98.27%and90%respectively.Therecoveryofnickelwas91.83%,thetotalrecoveryofaluminumwas92.78%.Ithadgottheconclusionthatthetechnologicalprocesswasdeveloped,low-cost,high-extractionandprocessfeasibilitywithgoodeconomicbenefitsandenvironmentalbenefits.
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