Ukadaulo wopaka ma electrode a graphite, makamaka ma antioxidant, umawonjezera moyo wawo wogwirira ntchito kudzera mu njira zingapo za physicochemical. Mfundo zazikulu ndi njira zaukadaulo zafotokozedwa motere:
I. Njira Zazikulu Zophikira Zotsutsana ndi Oxidative
1. Kupatula Mpweya Wotulutsa Oxidizing
Pa kutentha kwambiri, malo a graphite electrode amatha kufika 2,000–3,000°C, zomwe zimayambitsa ma oxidation amphamvu ndi mpweya wa mumlengalenga (C + O₂ → CO₂). Izi zimapangitsa kuti 50–70% ya ma electrode agwiritsidwe ntchito m'mbali mwa khoma. Zophimba za antioxidant zimapanga zigawo zokhuthala za ceramic kapena zitsulo-ceramic kuti ziletse bwino kukhudzana kwa mpweya ndi graphite matrix. Mwachitsanzo:
Zophimba za RLHY-305/306: Gwiritsani ntchito mapangidwe a nsomba za nano-ceramic kuti mupange netiweki yagalasi pa kutentha kwakukulu, kuchepetsa ma coefficients ofalitsa okosijeni ndi kupitirira 90% ndikuwonjezera moyo wa ma electrode ndi 30–100%.
Zophimba za Silicon-Boron Aluminate-Aluminum Multilayer: Gwiritsani ntchito kupopera malawi kuti mupange mapangidwe a gradient. Gawo lakunja la aluminiyamu limapirira kutentha kopitilira 1,500°C, pomwe gawo lamkati la silicon limasunga mphamvu zamagetsi, kuchepetsa kugwiritsa ntchito ma electrode ndi 18–30% pamlingo wa 750–1,500°C.
2. Kudzichiritsa Kokha ndi Kukana Kugwedezeka ndi Kutentha
Zophimba ziyenera kupirira kutentha chifukwa cha kuchuluka/kupindika mobwerezabwereza. Mapangidwe apamwamba amakwaniritsa kudzikonza okha kudzera mu:
Nano-Oxide Ceramic Powder-Graphene Composites: Pangani mafilimu okhuthala a oxide panthawi yoyambirira ya okosijeni kuti mudzaze ming'alu yaying'ono ndikusunga umphumphu wa chophimba.
Kapangidwe ka Polyimide-Boride Bilayer: Layer yakunja ya polyimide imapereka chitetezo chamagetsi, pomwe layer yamkati ya boride imapangitsa filimu yoteteza. Kusintha kwa elastic modulus (monga, kuchepa kuchokera pa 18 GPa pa layer yakunja kufika pa 5 GPa pa layer yamkati) kumachepetsa kupsinjika kwa kutentha.
3. Kuyenda ndi Kutseka Mpweya Wokonzedwa Bwino
Ukadaulo wopaka utoto nthawi zambiri umaphatikizidwa ndi zatsopano za kapangidwe kake, monga:
Kapangidwe ka Dzenje Loboola: Kapangidwe ka ma electrode okhala ndi mabowo ang'onoang'ono, kuphatikiza ndi manja oteteza a rabara, kumawonjezera kutseka kwa malo olumikizirana mafupa ndikuchepetsa zoopsa za okosijeni m'malo ena.
Kulowetsa madzi mu vacuum: Kumalowa mumadzimadzi a SiO₂ (≤25%) ndi Al₂O₃ (≤5.0%) m'mabowo a electrode, ndikupanga gawo loteteza la 3–5 μm lomwe limachulukitsa katatu kukana dzimbiri.
II. Zotsatira za Kugwiritsa Ntchito Mafakitale
1. Kupanga Zitsulo za Electric Arc Furnace (EAF)
Kuchepetsa Kugwiritsa Ntchito Ma Electrode Pa Toni ya Chitsulo: Ma electrode okonzedwa ndi antioxidant amachepetsa kugwiritsa ntchito kuchokera pa 2.4 kg kufika pa 1.3–1.8 kg/ton, zomwe zikutanthauza kuchepa kwa 25–46%.
Kugwiritsa Ntchito Mphamvu Mochepa: Kukana kwa pulasitiki kumachepa ndi 20–40%, zomwe zimapangitsa kuti mphamvu yamagetsi ikhale yokwera komanso kuchepetsa kufunika kwa ma electrode m'mimba mwake, zomwe zimapangitsa kuti mphamvu igwiritsidwe ntchito pang'onopang'ono.
2. Kupanga Silikoni Yokhala ndi Nkhokwe Yoyatsidwa ndi Arc Furnace (SAF)
Kugwiritsa Ntchito Ma Electrode Okhazikika: Kugwiritsa ntchito ma electrode a silikoni pa tani imodzi kumatsika kuchoka pa 130 kg kufika pa ~100 kg, kutsika kwa ~30%.
Kukhazikika Kwambiri kwa Kapangidwe: Kuchuluka kwa voliyumu kumakhalabe pamwamba pa 1.72 g/cm³ pambuyo pa maola 240 ogwirira ntchito mosalekeza pa 1,200°C.
3. Ntchito Zotetezera Ng'anjo
Kulimba kwa Kutentha Kwambiri: Ma electrode okonzedwa amakhala ndi moyo wautali wa 60% pa 1,800°C popanda kusokoneza kapena kusweka.
III. Chigawo cha Ukadaulo ndi Kuyerekeza kwa Njira
| Mtundu wa Ukadaulo | Zopangira Zophimba | Magawo a Njira | Kuwonjezeka kwa Nthawi ya Moyo | Zochitika Zogwiritsira Ntchito |
| Zophimba za nano-ceramic | RLHY-305/306 | Kukhuthala kwa kupopera: 0.1–0.5 mm; kutentha kouma: 100–150°C | 30–100% | Ma EAF, Ma SAF |
| Zigawo zambiri zopoperedwa ndi moto | Silicon-boron aluminate-aluminium | Chigawo cha silikoni: 0.25–2 mm (2,800–3,200°C); chigawo cha aluminiyamu: 0.6–2 mm | 18–30% | Ma EAF amphamvu kwambiri |
| Kupaka vacuum + chophimba | SiO₂-Al₂O₃-P₂O₅ madzi ophatikizika | Kuchiza ndi vacuum: Mphindi 120; kuviika m'thupi: maola 5-7 | 22–60% | Ma SAF, ziwiya zotetezera |
| Zophimba zazing'ono zodzichiritsa zokha | Nano-oxide ceramic + graphene | Kuchiritsa kwa infrared: maola awiri; kuuma: HV520 | 40–60% | Ma EAF apamwamba |
IV. Kusanthula kwa Zachuma ndi Ukadaulo
1. Mtengo ndi Phindu
Kupaka utoto kumawononga 5–10% ya ndalama zonse za ma electrode koma kumawonjezera moyo wautumiki ndi 20–60%, zomwe zimachepetsa mwachindunji ndalama za ma electrode pa tani imodzi yachitsulo ndi 15–30%. Kugwiritsa ntchito mphamvu kumachepa ndi 10–15%, zomwe zimawonjezera kutsika kwa ndalama zopangira.
2. Ubwino wa Zachilengedwe ndi Zachikhalidwe
Kuchepa kwa ma electrode m'malo mwa ma elekitirodi kumachepetsa mphamvu ndi zoopsa za ogwira ntchito (monga kutentha kwambiri).
Imagwirizana ndi mfundo zosungira mphamvu, kuchepetsa mpweya wa CO₂ ndi matani pafupifupi 0.5 pa tani imodzi yachitsulo pogwiritsa ntchito ma electrode ochepa.
Mapeto
Ukadaulo wa graphite electrode wokutira umakhazikitsa njira yodzitetezera yokhala ndi zigawo zambiri kudzera mu kudzipatula, kukhazikika kwa mankhwala, komanso kukonza kapangidwe kake, zomwe zimapangitsa kuti zikhale zolimba kwambiri m'malo otentha kwambiri komanso oxidize. Njira yaukadaulo yasintha kuchoka pa zokutira zokhala ndi gawo limodzi kupita kuzinthu zophatikizika komanso zinthu zodzichiritsa zokha. Kupita patsogolo kwamtsogolo muukadaulo wa nanotechnology ndi zinthu zoyesedwa kudzawonjezera magwiridwe antchito a zokutira, ndikupereka mayankho ogwira mtima kwambiri kwa mafakitale otentha kwambiri.
Nthawi yotumizira: Ogasiti-01-2025