1. Extraction Los Ntawm Vanadium-Bearing ores
a. Roasting txheej txheem (thawj txoj kev)
Cov Khoom Siv Raw:
Vanadium-nplua nuj ores (piv txwv li,neeg vij vanadinite, polronite, lossisVanadium-titanium Magnetite).
Sodium carbonate (na ₂co₃) lossis sodium chloride (NACL) raws li cov neeg sawv cev.
Cov kauj ruam:
Crushing thiab sib xyaw:
Ore yog crushed thiab tov nrog Na-oos / nacl (kom hloov vanadium oxides rau hauv dej-soluble sodium vanadates).
Ci ntsa iab:
Rhuab nyob rau hauv ib lub cub qaum lossis cua sov ntawm800-1000 Degreehauv kev oxidizing huab cua:
2Fevev2o 4+4 na2co}}}}}}}}}}}}}} {{{{{{}
Xev:
Cov khoom ci ci yog yaj nyob rau hauv dej kub los yog dilute sulfuric acid mus extract sodium vanadate (navo₃).
Nag lossis daus:
Acidify cov kev daws teeb meem (pH ~ 2-3) nrog h₂so₄ los nag dawbNcuav mog qab zib liab(Lub suab hydrated v₂o₅ premursor):
2 {{{1} h2so4 → v2o5⋅nh2o ↓ + ↓ → v2 o5 ↓ + na2 so4
Kev suav:
Ua kom sov lub ncuav mog qab zib liab ntawm500-600 degreemus rau Dehydrate thiab daim ntawv ntshiab v₂o₅:
V2o5⋅nh2o → → → → {{4 {}}}} ↑ v2 o5 ⋅nh2 o5 + nh2 o ↑
2. Rov qab los ntawm cov ntaub ntawv theem nrab
a. Siv catalysts siv
Qho tseem ceeb:
Siv v₂o₅-based catalysts los ntawm sulfuric acid nroj tsuag lossis scria.
Kev ua:
Xev: Kho nrog naoh lossis hiceso₄ kom yaj vanadium.
Huv: Tshem tawm impurities (piv txwv li, FE, AL) ntawm PH hloov kho.
Nag los & Kho: Zoo ib yam li cov ore-raws li txoj kev.
b. Roj av nyob
Qho tseem ceeb:
Vanadium-nplua nuj ya tshauv lossis cov seem los ntawm cov roj ua kom zoo.
Kev ua:
Oxidative ci: Hloov dua Vagadium Sulfides / Oxides rau V₂o₅.
Hydrometallurgy: Siv cov kua qaub / alkalis, ua raws li los ntawm kev ntxuav thiab dej nag.
3. Lwm txoj hauv kev
a. Chlorination Txheej Txheem
Lub ntsiab lus:
Rov qab ua Vanadium ores nrog CLO roj kom tsim cov vocl₃, uas yog tom qab ntawd oxidized rau v₂o₅.
Lus teb pauj ib yam:
V2o {{5+3 cl 2+ CL2 - C}} CL2 + CE} CL2 + CLE ↑ (ua raws li los ntawm hydrolysis thiab calcination)
Kev siv: Haum rau cov qib qis ees.
b. Bioleaching
Tawm Tshuab:
Siv cov kab mob me (piv txwv li,Acidithiobacillus ferrooxidans) rau ob vanadium los ntawm ores.
Qhov Zoo: Eco-friendly thiab lub zog-txuag.
