纤维素还原低含量软锰矿制备硫酸锰

23220062FINECHEMICALSVol.23No.2Feb.2006*41110519.02%m:m=1:4130～97µm94.68%MnO2MnO2t/d1t/a2t/aTF111.3A1003-5214200602-0195-03PreparationofManganeseSulfatefromPyrolusitewithCelluloseasReductantZHANGXiao-yunTIANXue-daChemicalEngineeringCollegeXiangtanUniversityXiangtan411105HunanChinaAbstractSomecellulosewasusedasreductanttoreducepyrolusiteoflowgradeandmanganesesulfatewasobtainedbyleachingthereactionproductwithsulphuricacid.Themassratioofcellulosereductanttopyrolusitethesizeofcellulosereductantandthecomponentchangeofpyrolusiteafterreductionwereinvestigated.Forthepyrolusitewithamanganesegradeof19.02%theoptimummassratioofcellulosereductanttopyrolusiteis1:4andthesizeofcellulosereductantrangesfrom130µmto97µm.TheresultsshowedthatthecellulosereductantisabletoreduceMnO2toMnOwithaconversionratiomorethan94.68%.Thequalityofmanganesesulfateissuperiortonationalstandard.Basedonapilottestof2t/atwofactoriesoneisof10000t/aproductioncapacityandtheother2000t/awerebuilttheoperationwassatisfactoryandmanganesesulfateofhighqualitywasobtainedinboth.KeywordspyrolusitecellulosereductantreductionleachingmanganesesulfateFoundationitemsSupportedbythekeyitemofHunanprovinceScienceandTechnologyDepartment03SSY1011anditemofHunanprovinceEducationDepartment04C64580%60t/a60%180%228%*[e-mail]25%3～89～13MnO2MnO45MnO2MnSO4FeS2MnO2MnO11.111Table1ElementaryanalysisofpyrolusitetestedMnFeCaCuPMg/%19.028.0516.540.0020.0221.58wH2O=5%～10%22Table2AnalysisofmaincomponentsincellulosereductantH2O/%5.9371.917.9014.261.20.15mm90%1500mLwH2SO4=30%1000mL22.1100g200µm51015202530gpH2.5±0.1Mn11Fig.1EffectofmassratioofcellulosereductanttopyrolusiteonMnextraction120%Mn90%m:m=1:42.297130139200295452µm25g100g30minMn22130～97µm691FINECHEMICALS232MnFig.2EffectofsizeofcellulosereductantonMnextraction2.3130µm50g200g30min35℃33Table3ComponentofnodulebeforeandafterreactionMnO2Mn2O3Mn3O4MnOFe2O3Fe3O4/%29.780.150.230.0011.000.65/%0.450.330.6823.242.308.88MnMnOMn2O3Mn3O4FeFe3O4MnO2Fe2O314MnO22.42t/dMnO44Table4ResultofpilotplanttestcompareswithnationalstandardsGB/T16228615GB82538716/%94.68/%89.50wMnSO4H2O98.20-98.0-98.0wMn/%31.96-31.8-31.8wPb/%0.000400.0015wFe/%0.000400.004w/%0.04500.0500.05wCl-/%0.0100.02GB/T162286GB825387500110000t/a10012000t/a3MnO2MnO1.M.1994190.2.J.199715430-34.3.J.200422235-37.4.J.200227139-41.5.J.200241266-69.6.J.2000211103-107.7.J.1999332-34.8RajkoZVracarP.ManganeseleachingintheFeS2-MnO2-O2-H2OsystemathightemperatureinanautoclaveJ.Hydrometallurgy200055179-92.9.J.200335159.10.J.20013366-7.11.J.199729223-25.12.J.200525228-30.13.J.199820167-69117.14.J.2005154650-654.15GB/T162286S.16GB825387S.7912