混合細菌浸出鐵礦石中磷的研究.pdf

1、武漢理工大學碩士學位論文混合細菌浸出鐵礦石中磷的研究姓名：鮑光明申請學位級別：碩士專業(yè)：礦物加工工程指導教師：龔文琪20091201AbstractTheironoreresourcesareabundantin0111“countrybutleanoreismuchmore也antherich，雒dmostironoreneedsmineraldressingbeforesmeltingThestudiesofremovingphos

2、phorusalevitalforimprovingthequalityofdomesticironoreandhavegreatpracticalsignificanceforpromotingthedevelopmentofChineseironandstoelindustryTraditionalphysicalmethodsarenoteffective，thecostsofthedlanicalmethodisveryhigh

3、andmakesitlimitedforit’Shighpollutiontotheenvironment，butmicrobialhydrometallurgicaltechnologyisreceivedmuchconcernbeca=useofit，SeconomicalefficiencyandbeingenvironmentallyfriendlyAcidithiobacillusferrooxidansandAcidithi

4、obacillusthiooxidanscanmakeuseofoxvgentooxidizereducedironorsulfurtogainenergyandleachtheavailablematerialsandSOtheyhavebecomethemainbacteriaintheprocessofhydrometallurgyAstheresultofthedifferenteffectsofvariousbacteria，

5、mixedmicroorganismshavecomplementaryadvantages，henceit’SfeasibleformixedmicroorganismstemovethephosphorusinironoreInthispaperthepreliminaryphysiologyofAttandAtfhasbeenstudied，andtlenthese鉚okmdsofbacteriaweremixedtoleacho

6、rebysynergisticactionofthem，andtheefleetofdifferentprocessingconditionsontheleachinghasbeenstudiedTheshakingflasktestsshowedthatAtfandAtthaveacertaineffectofdephosphorusonhematitewhenusedseparatelyAndwhentheyalemixedinac

7、cordancewiththevolu醢l(fā)eratio(Atfbacteria：Attbacteriamixed1：2)，dephosphorizationeffectofleachingisbetterthansinglebacterialeaching，withadephosphorizationrateofupto84％Theoptimumbacterialinoculumis10％，buthigherinoculumdoesno

8、tenhancethedephosphorizationTheinitialslurrypHhasgreaterimpactonthedephosphorizationAtpH18~25，theabilityofbacteriadephosphorizationisstrongerbutwhentheinitialpH4，almostnodephosphorizationCanbeseenShakingflasktestsshowedt