He mahi nui tā ngā irahiko karāpiti i roto i te hanga maitai o te oumu pewa hiko (EAF), ā, e horapa ana ā rātou mahi puta noa i te tukanga hanga maitai katoa, ā, e āhei ai te hanga maitai whai hua me te pumau mā roto i ēnei āhuatanga e whai ake nei:
1. Te Arataki Au me te Whakaputa Āwhata
Mahi Matua: Ko ngā irahiko karāpiti te "kaikawe iahiko" i roto i ngā EAF, e whakauru ana i te pūngao hiko ngaohiko teitei ki roto i te oumu mā te kawe hiko pai rawa atu (ātete iti). Ka puta he pewa hiko pāmahana teitei (neke atu i te 3000°C) i waenganui i ngā pito o te irahiko me te maitai para, ngā rauemi utu rānei.
Mahi Āwhata: Ka whakarewa tika te wera nui e tukuna ana e ngā āwhata i ngā maitai para me te rino rewa, ka hanga he maitai wai, me te whakarato hoki i te pūtake pūngao mō ngā tauhohenga whakamahine o muri mai.
2. Ātete ki te pāmahana teitei me te pumau wera
Ngā Āhuatanga Rauemi: Ko te ira rewa o te karāpiti he tae atu ki te 3650°C, ā, ka mau tonu te kaha teitei me te kore e rerekē te āhua i raro i ngā pāmahana tino kino (tata ki te 2000–3000°C) me te ru wera nui i te rohe pewa.
Ngā Painga o te Whakamahinga: Ki te whakatauritea ki ngā irahiko parahi (te ira rewa ~1083°C), he pai ake te pumau o ngā irahiko karāhe i ngā pāmahana teitei, ā, e ātete ana ki te whakangawari, ki te rewa rānei. Mā tēnei ka mau tonu te mura o te pewa, ā, ka whakaitihia te auau whakaweto o te oumu mō te tiaki.
3. Te Ātete ki te Waikura me te Matū
He iti te tauhohenga matū: He iti noa iho ngā tauhohenga matū o te graphite ki te maitai rewa me te para i ngā pāmahana tiketike, ā, ka ārai i te whakaurunga mai o ngā poke (hei tauira, te waro, te hāora) ka taea te whakararu i te parakore o te maitai.
Ātete ki te Waikura: Mā ngā maimoatanga motuhake (hei tauira, te whakakī ki ngā antioxidants) ka hangaia he paparanga tiaki ki runga i ngā mata o te irahiko karāhe, ka whakaiti i ngā ngaronga waikura pāmahana teitei, ka whakaroa hoki i te roa o te mahi.
4. Te Whakamahinga Pūngao Whai Hua me te Tiaki Pūngao
Arotau i te Whai Hua o te Wera: Mā te kawe hiko o ngā irahiko karāwhata ka taea te huri pai i te pūngao hiko ki te wera, ka whakaiti i te ngaronga pūngao me te whakapoto i ngā huringa whakarewa (ka whakaitihia te wā whakarewa mō ia wera mā te 10–20%).
Te Whai Hua o te Utu: He iti ake te kaha e pau ana i ngā irahiko karāpiti ki ērā atu rauemi, ā, ka taea te whakamahi anō (me ngā irahiko toenga wāhanga ka taea te hangarua anō mō te tukatuka), ka whakaiti i ngā utu whakaputa katoa.
5. Tautoko Hanganga me te Ngāwari Whakahaere
Kaha Ā-Mīhini: Me tu atu ngā irahiko karāpiti i tōna ake taumaha, i ngā kaha hikohiko, me ngā wiri ā-mīhini. Mā tōna kaha me tōna pakari ka ārai i te whati, i te piko rānei i te wā e whakarewaina ana.
Te Whakarerekētanga Rahi: Ka taea te whakarite i ngā irahiko i roto i ngā diameter rerekē (hei tauira, 400–800 mm) me ngā roa kia rite ki ngā kaha EAF me ngā whakaritenga tukanga, hei tautoko i te whakaputanga tonu i te tauine nui.
6. Te Oranga Taiao
Ngā Tukunga Waro Iti: Mā te hanga maitai EAF, e whakamahi ana i te maitai para hei rauemi whāngai, ā, e whakamahi ana i te whakamahana whai hua o ngā irahiko karāpeti, ka tino whakaiti i te keri rino me te kai kōka, ā, ka whakaiti i ngā tukunga CO₂.
Te Hangarua Rauemi: Ka taea te hangarua me te whakamahi anō i ngā hua taha pēnei i ngā toenga hiko me ngā irahiko toenga mai i te hanga hiko karāhe, kia rite ki ngā mātāpono ōhanga porowhita.
Ngā Horopaki Whakamahinga Whaihua
Ngā Oumu Āwhata Hiko Tino Mana-Tiketike (UHP): Mā ngā irahiko karāpeti whānui-rahi (hei tauira, ≥750 mm) e honoa ana ki ngā iahiko teitei (rau mano o ngā ampere) ka taea te whakarewa tere me te whakamahine, he pai mō te whakaputa i ngā momo maitai uara-nui (hei tauira, te maitai pepa motuka, te maitai silicon).
Ngā Oumu Āwhata Hiko DC: Ka whakaitihia e ngā irahiko karāti kotahi te rahi te whakapaunga irahiko me ngā ngaronga hiko, ka whakarei ake i te pai o te whakarewa.
Whakarāpopototanga
Ko ngā irahiko karāpiti, me ō rātou kawe hiko tino pai, te ātete ki te pāmahana teitei, te pumau matū, me te pakari miihini, koia te "ngakau" o te hanga maitai EAF. Ka pā tika atu rātou ki te pai o te whakarewa, te kounga maitai, me ngā utu whakaputa, me te whakatairanga i te tiaki pūngao, te whakaiti i ngā tukunga, me te hangarua rauemi. Ka akiakihia e tēnei te umanga maitai ki te hurihanga matomato, iti-waro. I te pikinga ake o te wahanga o te hanga maitai EAF (hei tauira, te whāinga "Mahere Rima-Tau 14" a Haina o te 15% o te putanga maitai EAF), ka piki haere tonu te hiahia mō ngā irahiko karāpiti me ngā whanaketanga hangarau i roto i tēnei mara.
Wā tuku: Hurae-17-2025