生物浸出低品位镍铜硫化矿中的镍、铜、钴

14Vol.1No.4200110TheChineseJournalofProcessEngineeringOct.2001,(100080)3.15%20d95.4%,48.6%82.6%25%14d80.2%,45.2%78.4%.40:149d48.5%,37.5%33.6%.TF803.21A1009–606X(2001)04–0369–051..Miller[1]70d30%~50%.Southwood[2]...3.[3](TF5)pH1.2~2.0108~109/g(/)(TT)TF5:TT=2:135oC..2,.0.68%0.34%0.022%.–30097%–30054%..LeathenStarky35oC140r/min.2:1..2000–09–01,2001–01–04(59834150)(1975–),.370133.15%15%25%(30oC).5%(3.5cm2.5cm)270mlLeathen15g(–30097%).pH2.030ml60L/h2d.15%25%,5g10ml.311.15%95%82%.5%.024681012141618200102030405060708090100Solidconc.(%)51525LeachedNi(%)Time(d)0246810121416182005101520253035404550Solidconc.(%)51525LeachedCu(%)Time(d)1Fig.1LeachedNiandCubyaeratedbioleaching1Table1LeachedNi,CuandCobyaeratedbioleachingCompositionofresidue(%)Leached(%)No.Solidconc.(%)Time(d)Weightloss(%)NiCuCoNiCuCo1520220.1100.230.005687.346.280.221520200.0390.220.004895.448.682.632520180.1600.240.006480.242.376.2.....3.2.437135oC300r/min40L/h.3.2.115%,25%,30%.15%140mlLeathen30g(–30097%)pH2.060ml.25%30%5g10ml.2.2.024681012140102030405060708090100Solidconc.(%)152530LeachedNi(%)Time(d)0246810121405101520253035404550Solidconc.(%)152530LeachedCu(%)Time(d)2Fig.2LeachedNiandCubyagitatedbioleachingwithairbubblingforvarioussolidconcentrations2Table2LeachedresultsbyagitatedbioleachingwithairbubblingforvarioussolidconcentrationsCompositionofresidue(%)Leached(%)No.Solidconc.(%)Time(d)Weightloss(%)NiCuCoNiCuCo11514200.230.260.006673.539.176.022514180.190.230.005878.243.578.433014180.250.280.007269.833.173.225%.15%.25%15%.30%[4].3.2.225%,–30054%–30097%.100mlLeathen50g.pH2.0100ml.200ml.33.3Table3LeachedresultsinagitatedbioleachingwithairbubblingforvariousoresizesSolidconc.(%)Time(d)LeachedNi(%)LeachedCu(%)–300mesh54%251476.240.1–300mesh97%251480.245.237210246810121405101520253035404550-300mesh54%-300mesh97%LeachedCu(%)Time(d)402468101210102030405060708090100-300mesh54%-300mesh97%LeachedNi(%)Time(d)3Fig.3LeachedNiandCubyagitatedbioleachingwithairbubblingforvariousoresizes....[4].....3.3..(2.5cm)–20~+40100g(pH=2)20cm,4000ml25cm/h25oC,.pH2.0400ml.Leathen.7d44.071421283542490102030405060708090100NiCuLeached(%)Time(d)4Fig.4LeachedNiandCuincolumnboileaching4Table4ResultsfromcolumnbioleachingCompositionofresidue(%)Leached(%)L:SLeachingtime(d)Weightloss(%)NiCuCoNiCuCo40:149140.410.250.01748.537.533.6437328d1.2mg/g(/)..Eh0.62mV(SCE).pHpH0.002mol/g...43:(1)15%20d95.4%48.6%82.6%.(2)25%14d80.2%45.2%78.4%.(3)49d48.5%37.5%33.6%.[1]MillerPC.BacterialHeapLeachingofLow-gradeNickelMaterial[A].ProceedingofInternationalConferenceonMineralScienceandTechnologyMINTEK,50[C].1990.203–211.[2]SouthwoodAJ.ParametersAffectingtheBacterialHeapLeachingofLowGradeNickelFerrousMaterial[A].Proceedingof15thInternationalMineralProcessingCongress[C].1985.114–119.[3].[J].,2001,1(1):49–53.[4].[J].,2001,1(3):285–288.BoileachingofNi,CuandCofromaLow-gradeNi–CuSulfideOreCHENQuan-jun,FANGZhao-hengInst.Chem.Metall.,ChineseAcademyofSciences,Beijing100080,ChinaAbstractBioleachingofNi,CuandCofromtheJinchuanlow-gradeNi–Cu–Cosulfideorehasbeeninvestigatedwithaeratedleaching,agitatedleachingwithairbubbling,andcolumnleachingrespectively.Thehighestrecoverywasachievedintheaeratedleaching.Leaching20dwithpulpdensityof15%,theleachedNi,CuandCowere95.4%,48.6%and82.6%respectively.Byagitatedleachingwithairbubblingfor14datthepulpdensityof25%,theleachedNi,CuandCowere80.2%,45.2%and78.4%respectively.Withcolumnleachingfor49d,theleachedNi,CuandCowere48.5%,37.5%and33.6%respectively.Keywords:bioleaching;Thiobacillusferrooxidans;Thiobacillusthiooxidans;low-gradeNi–Cusulfideore