高碱性脉石低品位氧化铜矿浸出工艺与氨浸动力学研究.pdf

Studyontheleachingoflow·-gradeoxidizedcopperorewithhighalkalinitygangueandit’icsofammonialeachingAbstract:TheoxidizedcopperorefromXinjiang,haslowgradeofcopper’’,thepaperaimsatdevelopingaeconomicalandeffectiveprocessofcopperextraction,:,thesulphidizingflotation—binedprocess,andtheammonialeachingindifferentammonia-:-binedprocessshowthat:%.Buttheacidconsumptionistoohigh(upto600kg/t).necalciumsulfateandmagnesiumsulfate,producedintheleachingprocess,(only40%ofammonialeachingleachingliquor),’umulationofcopperbysulphidizingflotation,however,duetopoorselectivityofpharmacy,thecontentofcalciumandmagnesiumintheroughconcentrateofsulfideflotationhasnotbeeneffectivelyreduced,that1cadstopoorindicatorsofthesubsequentacidleachingprocess,andCan’:Theprocesswascontrolledbvbothinterfacemasstransferandthediffusionofsolidresidualfilm(orproductlayer).Thefactorswhichaffectingthe1cachingrateofcopperIncludetemperature,theconcentrationsofleachingagent,particlesizeandliquid-solidratio,,andthesemi—icsoftheoxidativeammonialeachingiSasfollows:}ln()+(1一X).1乃。1=×102c氛(L/S)o·355c_Q过1硫75“0.?2sg(d0)‘。1506’:TheleachingrateandrecoveryCanbeimprovedbyincreasingtheconcentrationandlV万方数据temperatureofleachingsolution,properraisingtheliquid-solidratioorreducingtheparticlesi