Ihame ry’imikorere ya electrode za grafiti zifite imbaraga nyinshi (UHP) rishingiye ahanini ku buryo bwo gusohora arc. Zikoresheje uburyo bwazo budasanzwe bwo gutwara amashanyarazi, ubushyuhe bwinshi, n’imiterere ya mekanike, izi electrode zituma ingufu z’amashanyarazi zihinduka neza mu ngufu zishyuha mu bidukikije bishongesha ubushyuhe bwinshi, bityo zigatuma habaho imikorere y’ibyuma. Hasi hari isesengura rirambuye ry’imikorere yazo y’ingenzi:
1. Gusohora Arc no Guhindura Ingufu z'Amashanyarazi mu Bushyuhe
1.1 Uburyo bwo gushushanya umurambararo
Iyo electrode za grafiti za UHP zihujwe n'ibikoresho byo gushongesha (urugero: amatanura y'amashanyarazi), zikora nk'ibikoresho biyobora amashanyarazi. Gusohora umuriro mwinshi bitanga umurongo w'amashanyarazi hagati y'umutwe w'amashanyarazi n'umuriro w'itanura (urugero: ibyuma bisigaye, amabuye y'agaciro). Uyu murongo ugizwe n'umuyoboro wa plasma uyobora amashanyarazi ukorwa na ionization ya gaze, ubushyuhe burenze 3000°C—urenze cyane ubushyuhe busanzwe bwo gutwika.
1.2 Ihererekanya ry'ingufu mu buryo bunoze
Ubushyuhe bwinshi buturuka kuri arc bushongesha umuriro w’itanura mu buryo butaziguye. Uburyo bwo gutwara amashanyarazi bw’iyo electrode (bufite ubushobozi bwo kugabanya ingufu kugeza kuri 6–8 μΩ·m) butuma ingufu zitakaza ingufu nke mu gihe cyo kohereza, bigatuma ingufu zikoreshwa neza. Urugero, mu gukora ibyuma bya arc furnace (EAF) by’amashanyarazi, electrode za UHP zishobora kugabanya imikorere y’icyuma ku kigero kirenga 30%, bikongera umusaruro cyane.
2. Imiterere y'ibikoresho n'icyitegererezo cy'imikorere
2.1 Ihindagurika ry'imiterere y'inyubako mu bushyuhe bwinshi
Ubushobozi bwo kwihanganira ubushyuhe bwinshi bw'ama-electrode buturuka ku miterere yayo ya kristale: atome za karuboni zigizwe n'ibice bigize umuyoboro wa covalent bond binyuze mu guhuza sp², hamwe n'imiyoboro ihuza ibice binyuze mu mbaraga za van der Waals. Iyi miterere igumana imbaraga za mekanike kuri 3000°C kandi itanga ubudahangarwa budasanzwe bw'ubushyuhe (nubwo ubushyuhe buhindagurika kugeza kuri 500°C/min), ikaba irusha electrode z'icyuma gukora neza.
2.2 Ubudahangarwa ku kwaguka k'ubushyuhe n'ubwiyongere bw'amazi
Electrode za UHP zigaragaza ko ubushyuhe budahagije (1.2 × 10⁻⁶/°C), zigabanya impinduka mu bushyuhe bwinshi kandi zikarinda ko habaho imivuniko iterwa n’ubushyuhe bwinshi. Ubudahangarwa bwazo bwo kwihisha (ubushobozi bwo kurwanya kwangirika kwa pulasitiki mu bushyuhe bwinshi) bunozwa binyuze mu guhitamo ibikoresho fatizo bya needle coke no gukora graphitization igezweho, bigatuma imiterere yazo iguma neza mu gihe cy’igihe kirekire cyo gukora ibintu byinshi.
2.3 Oxidation no kurwanya ingese
Mu gushyiramo antioxydants (urugero: borides, silicides) no gushyiramo irangi ku buso, ubushyuhe bwo gutangiza oxidation ya electrodes buri hejuru ya 800°C. Ubushyuhe bwa shimi mu kurwanya irangi rishongeshejwe mu gihe cyo gushongesha amashanyarazi bugabanya ikoreshwa ry’amashanyarazi menshi, bigatuma igihe cyo gukoresha electrode kigera ku nshuro 2-3 z’igihe cyo gukoresha electrode zisanzwe.
3. Guhuza imikorere no kunoza sisitemu
3.1 Ubucucike n'ubushobozi bw'ingufu
Electrode za UHP zishyigikira ubucucike bw'amashanyarazi burenga 50 A/cm². Iyo zihujwe na transformers zifite ubushobozi bwo hejuru (urugero, 100 MVA), zituma ingufu z'ifuru imwe zirenga MW 100 zinjira. Iyi miterere yihutisha igipimo cy'ubushyuhe mu gihe cyo gushongesha—urugero, kugabanya ikoreshwa ry'ingufu kuri toni ya silikoni mu musaruro wa ferrosilicone kugeza munsi ya 8000 kWh.
3.2 Uburyo bwo gusubiza ibintu mu buryo buhindagurika no kugenzura uburyo bikorwamo
Sisitemu zigezweho zo gushongesha zikoresha Smart Electrode Regulators (SERs) kugira ngo zikomeze kugenzura aho electrode iherereye, ihindagurika ry'umuvuduko w'amashanyarazi, n'uburebure bw'umurambararo, zigakomeza gukoresha electrode mu cyuma kiri hagati ya kg 1.5–2.0/t. Hamwe no kugenzura ikirere cy'itanura (urugero, CO₂ ratios), ibi binoza imikorere myiza ya electrode-charge coupling.
3.3 Guhuza Sisitemu no Kongera Ingufu mu Mikoreshereze Yazo
Gukoresha electrode za UHP bisaba ibikorwa remezo bishyigikira, harimo sisitemu z'amashanyarazi zifite ingufu nyinshi (urugero, guhuza 110 kV), insinga zikonjeshwa n'amazi, n'ibikoresho byo gukusanya ivumbi neza. Ikoranabuhanga ryo kugarura ubushyuhe (urugero, amashanyarazi akoresha amashanyarazi aturuka ku gaze) rituma ingufu zikoreshwa neza ku kigero cya 60%, bigatuma ingufu zikoreshwa mu gucukura zigabanuka.
Ubu buhinduzi bugumana ubuziranenge mu bya tekiniki bukurikiza amategeko y’ubushakashatsi n’inganda, butuma abantu bihariye bumva neza.
Igihe cyo kohereza: Gicurasi-06-2025