Cov qauv kev tsiv teb tsaws chaw thiab kev hloov pauv ntawm cov ntsiab lus xws li sodium (Na), vanadium (V), nickel (Ni), thiab calcium (Ca) hauv roj av coke thaum lub sijhawm calcination yog cuam tshuam los ntawm qhov kub thiab txias, cov qauv tshwm sim, thiab cov tshuaj lom neeg. Cov qauv tshwj xeeb yog raws li nram no:
1. Kev Tsiv Teb Tsaws Chaw thiab Kev Ua Kom Sodium (Na) Ntsws
- Theem kub qis (<1000°C): Sodium feem ntau muaj nyob rau hauv daim ntawv ntawm cov ntsev inorganic (piv txwv li, sodium sulfate, sodium chloride) lossis cov organic complexes, nrog rau qhov tsis tshua muaj volatility. Thaum qhov kub nce siab, nws maj mam decomposes mus rau hauv cov pa roj oxides (piv txwv li, Na₂O) lossis hydroxides (piv txwv li, NaOH).
- Theem kub siab (>1000°C): Qhov volatility ntawm sodium nce ntxiv ntau heev. Cov tshuaj uas tsim los ntawm sulfur thiab chlorine (piv txwv li, Na₂S, NaCl) yooj yim sublimate lossis decompose thaum kub siab, ua rau sodium tawm hauv daim ntawv gaseous.
- Cov yam cuam tshuam: Qhov ua rau sodium volatilization cuam tshuam loj heev los ntawm huab cua calcination (oxidizing/reducing). Nyob rau hauv cov xwm txheej txo qis, sodium yuav volatilize ntau dua hauv daim ntawv ntawm sulfides.
2. Kev Tsiv Teb Tsaws Chaw thiab Kev Nqus Dej ntawm Vanadium (V)
- Cov Qauv Tshwm Sim: Vanadium hauv roj av coke feem ntau muaj nyob rau hauv cov qauv organic-bound (piv txwv li, vanadyl porphyrins) thiab cov qauv ruaj khov (piv txwv li, vanadium oxides, silicates).
- Theem kub qis (<1100°C): Cov vanadium uas khi nrog cov organic maj mam lwj thaum qhov kub nce ntxiv, hloov mus ua cov uas yaj tau hauv dej, hloov pauv tau ion, lossis khi nrog carbonate. Qee cov vanadium ua rau cov calcium thiab cov zaub mov hlau ua cov eutectics uas yaj tsawg.
- Theem kub siab (>1100°C): Qhov volatility ntawm vanadium nce siab heev. Organic-bound vanadium sai sai decomposes rau hauv gaseous VOₓ hom (piv txwv li, VO, V₂O₅), thaum ruaj khov vanadium (piv txwv li, V₂O₃) ib feem yaj thiab tso tawm me me ntawm vanadium ntawm qhov kub siab.
- Cov yam cuam tshuam: Qhov ua rau vanadium volatilization yog cuam tshuam los ntawm qhov kub thiab txias, qhov kub hnyiab, thiab cov khoom siv hauv cov pob zeb. Thaum kub siab, vanadium tsim cov qauv nanocrystalline nrog silicon thiab sulfur, ua rau muaj qhov ua rau volatilization ib nrab hauv daim ntawv gaseous.
3. Kev Tsiv Teb Tsaws Chaw thiab Kev Ua Kom Ntsws Ntawm Nickel (Ni)
- Cov Qauv Tshwm Sim: Nickel hauv roj av coke feem ntau muaj nyob rau hauv daim ntawv ntawm sulfides (Ni₃S₂), oxides (NiO), lossis silicates.
- Theem kub qis (<900°C): Nickel muaj nyob rau hauv Ni₃S₂, nrog rau qhov tsis tshua muaj volatility.
- Theem kub nruab nrab (900–1200°C): Ni₃S₂ maj mam hloov mus ua NiS hauv cov kua slag, mus txog qhov siab tshaj plaws ntawm NiS li ntawm 22.4% ntawm 1200°C, ua ntej rov qab mus rau Ni₃S₂ thaum qhov kub nce ntxiv.
- Theem kub siab (>1400°C): Nickel yaj ua cov pa roj (piv txwv li, Ni(g), NiS(g)), tab sis Ni₃S₂ tsis hloov mus ua Ni(s khov).
- Cov yam cuam tshuam: Qhov ua rau nickel volatilization raug cuam tshuam los ntawm cov neeg ua haujlwm gasifying (piv txwv li, O₂, H₂O). Kev ntxiv O₂ tiv thaiv kev hloov pauv ntawm Ni₃S₂ mus rau hauv elemental Ni thiab tiv thaiv kev tsim cov spinel compounds (piv txwv li, NiAl₂O₄).
4. Kev Tsiv Teb Tsaws Chaw thiab Kev Ua Kom Ntsws Ntawm Calcium (Ca)
- Cov Qauv Tshwm Sim: Calcium hauv roj av coke feem ntau muaj nyob rau hauv daim ntawv ntawm carbonates (CaCO₃), sulfates (CaSO₄), lossis silicates.
- Theem kub qis (<800°C): Cov carbonates lwj mus ua CaO thiab CO₂, thaum cov sulfates lwj mus ua CaO thiab SO₃, ua rau cov calcium ntau ntxiv rau hauv daim ntawv oxide.
- Theem kub nruab nrab (800–1200°C): CaO ua rau muaj cov pob zeb me me (xws li anorthite CaAl₂Si₂O₈), thiab tseem muaj qee cov calcium uas tseem nyob hauv cov khoom khov.
- Theem kub siab (>1200°C): Qhov volatility ntawm calcium yog qis, tab sis cov minerals uas yaj qis yuav yaj ib nrab lossis lwj thaum kub siab, ua rau calcium mus rau hauv cov roj lossis kua.
- Cov yam cuam tshuam: Kev tsiv teb tsaws chaw ntawm calcium yog cuam tshuam los ntawm qhov sib piv ntawm silica-alumina thiab qhov sib piv ntawm hlau-calcium. Kev nce ntxiv ntawm qhov sib piv ntawm silica-alumina txhawb kev hloov pauv ntawm FeV₂O₄ mus rau V₂O₃, thaum kev nce ntxiv ntawm qhov sib piv ntawm hlau-calcium tiv thaiv kev tsim ntawm CaAl₂Si₂O₈.
Cov Qauv Sib Txawv
- Kev vam khom kub: Tus nqi volatilization ntawm cov ntsiab lus kab mob nce nrog rau qhov kub, tab sis qhov kub thiab txias volatilization sib txawv ntawm cov ntsiab lus (piv txwv li, vanadium volatilizes siab tshaj 1100 ° C, thaum nickel dhau los ua qhov tseem ceeb tshaj 1400 ° C).
- Kev cuam tshuam ntawm cov qauv tshwm sim: Cov ntsiab lus organic-bound (piv txwv li, organic vanadium) yog cov volatile ntau dua li cov qauv ruaj khov (piv txwv li, vanadium oxides).
- Kev tswj cov tshuaj lom neeg: Kev ua kom cov ntsiab lus tsis muaj zog yog tswj los ntawm kev sib xyaw nrog cov leej faj thiab chlorine, tsim cov khoom sib xyaw uas yaj qis lossis cov pa roj (piv txwv li, Na₂S, VOₓ).
- Cov lus qhia txog kev ua kom zoo dua qub: Kev tswj qhov kub thiab txias ntawm calcination, huab cua, thiab cov khoom ntxiv (piv txwv li, cov khoom hloov kho silica-alumina) tuaj yeem txo qhov volatilization ntawm cov khoom phom sij thiab txhim kho qhov zoo ntawm calcined coke.
Lub sijhawm tshaj tawm: Plaub Hlis-17-2026