低品位菱鎂礦石細菌預處理反浮選脫硅及綜合利用研究

低品位菱鎂礦石細菌預處理反浮選脫硅及綜合利用研究摘要

低品位菱鎂礦石是一種難以回收的礦石資源，在傳統(tǒng)礦物處理工藝中存在浪費和污染問題。為解決這一問題，本研究選用菌種Acidithiobacillusferrooxidans進行預處理，試圖提高該礦石在反浮選中的選別性和脫硅率，并探索低品位菱鎂礦石的綜合利用。研究結(jié)果表明，以Acidithiobacillusferrooxidans為菌種的細菌預處理可以有效提高低品位菱鎂礦石在反浮選中的選別性和脫硅率，并降低處理過程中廢水的酸度和污染物含量。此外，通過石墨烯材料的制備、熱解和壓制，可將處理過的菱鎂礦渣轉(zhuǎn)化為石墨烯-銅復合材料，并用于電子元件的制備，實現(xiàn)了低品位菱鎂礦石的資源化利用。

關(guān)鍵詞：低品位菱鎂礦石；菌種預處理；反浮選脫硅；石墨烯-銅復合材料；電子元件制備

Abstract

Low-grademagnesiteoreisadifficult-to-recovermineralresourcewithwasteandpollutionproblemsintraditionalmineralprocessingprocesses.Tosolvethisproblem,thisstudyselectedAcidithiobacillusferrooxidansasthebacterialstrainforpretreatment,attemptingtoimprovetheselectivityandsilicaremovalrateofthemineralinreverseflotationandexploringthecomprehensiveutilizationoflow-grademagnesiteore.TheresultsshowedthatthebacterialpretreatmentwithAcidithiobacillusferrooxidanseffectivelyimprovedtheselectivityandsilicaremovalrateoflow-grademagnesiteoreinreverseflotation,andreducedtheacidityandpollutantcontentofthewastewaterduringprocessing.Inaddition,bypreparing,pyrolyzing,andpressinggraphenematerials,theprocessedmagnesiteslagcanbeconvertedintographene-coppercompositematerialsandusedforthepreparationofelectronicelements,achievingtheresourceutilizationoflow-grademagnesiteore.

Keywords:low-grademagnesiteore;bacterialpretreatment;reverseflotationandsilicaremoval;graphene-coppercomposite;preparationofelectronicelementTheutilizationoflow-grademagnesiteorehasalwaysbeenachallengingtaskduetoitshighimpuritycontentanddifficultyinprocessing.However,withtheproposedbacterialpretreatment,reverseflotation,andsilicaremovalprocesses,amoreefficientandsustainableapproachtomagnesiteoreprocessingcanbeachieved.

Thebacterialpretreatmentnotonlyhelpstoreducetheimpuritycontentoftheore,butitalsopromotestheseparationofmagnesitefromotherminerals.Thereverseflotationprocessfurtherseparatesthemagnesiteconcentratefromimpuritiessuchassilica,improvingthequalityofthefinalproduct.Thewastewatergeneratedduringprocessingisalsotreated,reducingpollutantcontentandpromotingsustainableproduction.

Moreover,theprocessedmagnesiteslagcanbeconvertedintographene-coppercompositematerials.Thisinnovativeapproachnotonlyutilizesthewastematerialgeneratedduringtheprocessingbutalsocontributestothedevelopmentofnewelectronicelements.Thegraphene-coppercompositematerialhasexcellentelectricalconductivity,makingitanidealmaterialforelectronicapplications.

Inconclusion,theproposedapproachfortheprocessingoflow-grademagnesiteoreisasignificantadvancementtowardssustainableandefficientutilizationofnaturalresources.Theuseofbacterialpretreatment,reverseflotation,andgraphene-coppercompositematerialsshowcasethepotentialfordevelopinginnovativesolutionsformineralprocessingandwastemanagementFurthermore,theutilizationoflow-grademagnesiteorecancontributetothereductionofenvironmentalimpactassociatedwithminingactivities.Aslow-gradeoresoftencontainimpuritiessuchasheavymetalsandradioactivematerials,theirprocessingandutilizationcanresultinenvironmentalpollutionandhealthhazards.Byadoptingsustainableprocessingmethods,suchastheoneproposedinthisstudy,thenegativeenvironmentalimpactscanbeminimized,contributingtotheoverallsustainabilityoftheminingindustry.

Inaddition,theutilizationofgraphene-coppercompositematerialinelectronicapplicationscanoffersignificantadvantagesovertraditionalmaterials.Theexcellentelectricalconductivity,highthermalconductivity,andmechanicalstrengthofthematerialmakeitsuitableforvariouselectronicdevicessuchastransistors,sensors,andconductiveadhesives.Moreover,theuseofcompositematerialscancontributetothereductionofmaterialconsumptionandwastegenerationinelectronicproduction,supportingthecirculareconomyprinciples.

Overall,theproposedapproachfortheprocessingoflow-grademagnesiteoreandtheutilizationofgraphene-coppercompositematerialdemonstratethepotentialforinnovationandsustainabilityintheminingindustry.Withtheincreasingdemandfornaturalresourcesandthegrowingawarenessofenvironmentalimpacts,itiscrucialtodevelopefficientandsustainablesolutionsformineralprocessingandwastemanagement.Theintegrationofadvancedtechnologiesandsustainablepracticescancontributetotheoverallsustainabilityoftheindustry,whilealsogeneratingeconomicbenefitsandsocialvalueforthestakeholdersTheminingindustryhastraditionallybeenassociatedwithnegativeenvironmentalimpacts,includinglanddegradation,waterpollution,andbiodiversityloss.However,theindustryalsoplaysacriticalroleinsupplyingtherawmaterialsneededforvariouseconomicactivities,includingmanufacturing,construction,andenergyproduction.Balancingtheseconflictingdemandsrequiresadoptinginnovativeandsustainablesolutionsthatreducetheenvironmentalimpactswhilemaintainingtheeconomicviabilityofminingoperations.

Onepotentialareaforinnovationintheminingindustryisthedevelopmentofefficientandsustainablemineralprocessingtechniques.Mostconventionalmineralprocessingmethodsrelyonenergy-intensiveprocesses,suchasgrinding,flotation,andsmelting,whichgeneratesignificantgreenhousegasemissionsandconsumelargeamountsofwaterandenergy.However,advancesintechnologiessuchashigh-pressuregrindingrolls,advancedflotationsystems,andhydrometallurgicalprocessescansignificantlyreduceenergyconsumption,materialwaste,andwaterusage,whilealsoimprovingtherecoveryratesofvaluableminerals.

Anotherareawhereinnovationcanimprovesustainabilityintheminingindustryiswastemanagement.Miningoperationsgeneratesignificantamountsofwaste,includingoverburden,tailings,andwasterock,whichcancontaintoxiccompoundsandheavymetals.Improperdisposalofthesewastescanleadtolong-termenvironmentalandhealthhazards,suchassoilerosion,groundwatercontamination,andacidminedrainage.However,innovationsinwastemanagementpractices,suchasminereclamation,wasteminimization,andalternativewastedisposaltechniques,cansignificantlyreducetheenvironmentalimpactsofminingoperations.

Inadditiontotechnologicalinnovations,sustainabilityintheminingindustryalsorequiresadoptingenvironmentallyconsciousbusinesspractices,suchasresponsiblesourcing,socialandcommunitydevelopment,andtransparentreporting.Forexample,miningcompaniescanadoptsustainablesupplychainpracticesthatpromotetheuseofethicalandresponsiblesourcingofrawmaterials,whilealsoensuringthatlocalcommunitiesandindigenouspeoplesareequitablycompensatedandconsulted.Similarly,miningcompaniescanengageinlong-termcommunitydevelopmentprojectsthatimprovethelivelihoodsandwell-beingoflocalcommunities,whilealsoreducingthesocialandenvironmentalimpactsofminingoperations.

Overall,thepotentialforinnovationandsustainabilityintheminingindustryissignificant,butitrequiresaconcertedeffortfromallstakeholders,includingminingcompanies,gov