Molybdenum Ore Beneficiation Methods

Molybdenum ore beneficiation txoj kev yog feem ntau flotation, cov zoo molybdenum mineral yog pyromolybdenite. Qee lub sij hawm, txhawm rau txhim kho qhov zoo ntawm molybdenum mloog zoo thiab tshem tawm cov impurities, molybdenum concentrate yog tom qab ntawd raug rau kev siv tshuaj lom neeg sab nraud.

Pyromolybdenite crystals yog hexagonal txheej los yog daim hlau, tsim los ntawm S-Mo-S qauv raws li interlayer van der Kijen thiab intralayer polar covalent daim ntawv cog lus S-Mo. Lub interlayer bonding tsis muaj zog heev, thaum covalent bonding nyob rau hauv cov khaubncaws sab nraud povtseg muaj zog heev. Yog li ntawd, molybdenite yog ib qho yooj yim heev los ua nyob rau hauv daim ntawv ntawm daim ntawv los yog phaj raws li cov txheej txheem interlayer cracking, uas yog vim li cas rau lub zoo ntuj floatability ntawm pyromorphite. Kev xyaum tau ua pov thawj tias: hauv kev sib tsoo kom zoo, molybdenite crystal dissociation tshwm sim nyob rau hauv S-Mo-S interlayer, hydrophilic S-Mo nto nyiaj rau ib feem me me. Txawm li cas los xij, thaum overgrinding, qhov kev faib ua feem ntawm S-Mo nto nce, thiab cov floatability txo, tab sis nyob rau lub sij hawm no, ntxiv ib co ntawm cov polar trapping tus neeg saib xyuas xws li cov tshuaj daj, uas yog conducive rau rov qab molybdenum pyroxene, tab sis overgrinding ua. ib tug tshiab sludge cuam tshuam cov nyhuv ntawm flotation. Yog li ntawd, kev sib cais ntawm molybdenum pyroxene kom zam thiab tiv thaiv kev sib tsoo ntau dhau, hauv kev tsim cov kev xav tau siv segmented sib tsoo thiab ntau ntu sib cais txheej txheem, thiab maj mam ncav cuag lub monomer dissociation, kom ntseeg tau tias qhov siab rov qab ntawm molybdenum concentrate.

Lub crushing ntawm molybdenum ore feem ntau yog siv peb-theem thiab ib qho txheej txheem kaw, thiab qhov loj ntawm cov khoom crushed kawg yog 12-15 hli.

Kev sib tsoo feem ntau yog ua nyob rau hauv lub pob zeb los yog pas nrig-pob zeb txheej txheem. Henderson yog tib qho uas siv cov txheej txheem sib tsoo semi-autogenous. Flotation yog los ntawm kev nyiam flotation. Roughing ua rau molybdenum crude concentrate, thiab cov ntxhib cheb tailings yog rov qab los rau cov ntxhia los yog muab pov tseg. Lub molybdenum rougher concentrate yog regrinded nyob rau hauv ob los yog peb theem, nrog plaub los yog tsib concentrates kom tau qhov kawg molybdenum concentrate.

Cov tshuaj flotation rau molybdenum ore yog cov roj tsis-polar ua cov cuab yeej cuab tam, nrog rau qhov sib ntxiv ntawm tus neeg sawv cev foaming. Tebchaws Asmeskas thiab Canada siv cov surfactant Syntex ua cov roj emulsifier. Raws li qhov xwm txheej ntawm ore, txiv qaub yog siv los ua tus neeg sawv cev kho, iav dej yog siv los ua cov hlab ntsha inhibitor, thiab qee zaum cyanide lossis sulfide ntxiv rau inhibit lwm cov hlau hnyav.

Txhawm rau kom ntseeg tau qhov zoo ntawm molybdenum concentrate, molybdenum concentrate muaj tooj liab, txhuas, hlau thiab lwm yam hlau hnyav hlau thiab calcium oxide thiab carbonaceous minerals yuav tsum tau muab cais ntxiv: feem ntau siv sodium sulfide lossis sodium hydrosulfide, cyanide lossis ferrocyanide system ntawm tooj liab thiab hlau; nrog dichromate los yog Nokes (Nokes) inhibition ntawm txhuas. Yog tias kev siv cov tshuaj inhibitors, cov ntsiab lus impurity tsis yog raws li cov qauv zoo, tseem yuav tsum tau ntxiv nrog kev siv tshuaj lom neeg: theem nrab tooj liab sulfide leaching nrog cyanide; chalcopyrite leaching nrog ferric chloride tov; galena leaching nrog hydrochloric acid thiab ferric chloride tov, tuaj yeem ncav cuag cov ntsiab lus txheem.

Calcium oxide-muaj veinstones yog ib qho yooj yim rau sludge, yog li tsis txhob over-grind rau ores uas muaj xws li veinstones. Kev tsim khoom feem ntau ntxiv cov iav dej, sodium hexametaphosphate lossis cov pos hniav organic raws li chondrite inhibitor lossis dispersant; Kuj tseem siv tau nrog cov pa roj carbon activated thiab CMC (carboxymethyl cellulose) los inhibit carbonate chondrites. Thaum kawg, nws tuaj yeem kho tau los ntawm leaching nrog hydrochloric acid lossis hydrochloric acid ntxiv rau cov tshuaj ferric chloride.

Kev sib cais ntawm cov zaub mov carbonaceous, thawj kauj ruam yog kom paub seb cov khoom siv carbonaceous puas yog graphite, asphalt lossis thee. Lub floatability ntawm cov carbonaceous minerals no zoo ib yam li cov molybdenite, tab sis qhov ceev yog me me, thiab feem ntau yuav raug tshem tawm los ntawm rov xaiv dua; kev siv sodium hexametaphosphate thiab CMC los tua cov charcoal ntab molybdenum; los yog ntxiv ferric chloride, iav dej thiab sodium hexametaphosphate los tua cov charcoal kuj zoo; kev siv roasting kom tshem tawm cov organic charcoal kuj yog ib txoj hauv kev. Nws yuav tsum tau muab sau tseg tias tag nrho cov txheej txheem ntawm kev sib cais ntawm carbonaceous minerals yog tam sim no tsis txaus siab, los yog ib qho teeb meem uas tseem tsis tau daws tag nrho.

SiO2 (silicon dioxide) cov ntsiab lus hauv cov hlab ntsha siab dhau, feem ntau cuam tshuam rau qib molybdenum concentrate. Nws tau raug txiav txim siab tias: SiO2 cov ntsiab lus nrog molybdenum concentrate qib nce thiab txo qis, ob qho tib si nyiam haus ib leeg. Ntev npaum li molybdenum ntxhia nce mus txog qhov zoo ntawm monomer dissociation, SiO2 cov ntsiab lus feem ntau tuaj yeem raug txo kom qis dua tus qauv. Ntxiv cov pa roj carbon activated rau adsorb cov roj tshuaj rau ntawm qhov chaw molybdenum, thiab tom qab ntawd ntxiv CMC los tiv thaiv silicate veinstone, SiO2 cov ntsiab lus kuj tuaj yeem txo qis dua tus qauv.