Nā ō rātou āhuatanga ā-tinana me ā-matū ahurei, kua waiho ngā irahiko karāpiti hei whiringa pai mō te hanga maitai i roto i te oumu pewa hiko (EAF). Ko tōna pai e whakaatuhia ana i roto i ngā āhuatanga e whai ake nei:
- Te Arahi Hiko Teitei me te Ātete Iti
- Te Tuku Pūngao Whai Hua: He tino iti te ātete o te karāpiti (tata ki te 1/3 ki te 1/4 o te ātete parahi), e āhei ai te tuku i te iahiko me te iti o te ngaronga pūngao i roto i ngā oumu pewa hiko. Mā tēnei ka pumau te tahunga pewa, ā, ka pai ake te whakamahinga o te pūngao hiko.
- Te Whakaiti i te Whakamahinga Pūngao: Ki te whakatauritea ki ētahi atu rauemi (hei tauira, ngā irahiko parahi), ka taea e ngā irahiko karāpiti te whakaiti i te whakamahinga hiko mā te 20%-30% pea, ka tino whakaiti i ngā utu hanga maitai.
- Ātete ki te Pāmahana Teitei me te Pūmautanga Wera
- Teitei Rawa o te Ira Rewa: Ka eke te ira rewa o te karāpiti ki te 3,650°C, he nui atu i te pāmahana hanga maitai noa (1,600-1,800°C). Ka mau tonu te hanganga pakari i raro i te wera nui, ka ārai i te rewa, i te rerekētanga rānei.
- Ātete ki te Ru Wera: Ka tere te urutau o te karāpiti ki ngā piki me ngā heke o te pāmahana (hei tauira, i te wā e tīmata ana/whakaweto ana te pewa), ka whakaitihia te ngatata, te pakaru rānei i puta mai i te ahotea wera, ā, ka roa ake te ora o te hiko.
- Te Āhua Matū Pai Rawa
- Te Ātete ki te Waikura me te Waikura: I ngā pāmahana tiketike, ka hangaia e te karāpeti he paparanga tiaki waro waikura matotoru i runga i tōna mata, ka wehea ai i te hāora me te waikura paru, ā, ka whakaitihia te whakamahinga hiko.
- Te Tauhohenga Iti: Kāore te karāpiti e tauhohe ki ngā wāhanga o te maitai me te para rewa (hei tauira, te rino, te hāora, te whanariki), ā, ka karohia te poke, ka whakarite hoki i te parakore o te maitai.
- Te Kaha Mīhini Teitei me te Ātete Pānga
- Te Pūmautanga Hanganga: Ko ngā irahiko karāpiti, i hangaia i raro i te pēhanga teitei, ā, i tunua ki ngā pāmahana teitei, he tino kiato me te hanganga moroiti ōrite, e tū atu ana ki ngā wiri ā-pūkaha me ngā kaha hikohiko i roto i ngā EAF.
- Ātete Ngatata: Ka ātete i te pakaru i te wā e hiki/whakaheke ana te hikohiko me ngā piki me ngā heke o te iahiko, kia kore ai e mutu te whakaputa.
- Māmā, ngāwari hoki te mahi miihini
- Te Utaina Taputapu Whakaiti: He iti iho te mātotoru o te karāpiti (~2.2 g/cm³) i te mātotoru o te parahi (~8.9 g/cm³), ka whakaiti i te taumaha o te hiko me te whakaiti i te pakaru o ngā pūnaha whakatārewatanga EAF me te whakapaunga pūngao.
- Tukatuka Whakaritenga: Ka taea te whakarite i ngā irahiko karāpiti mā te huri, te keri, me ētahi atu tukanga, ā, ka honoa mā te miro hei hanga i ngā huihuinga irahiko roa mō ngā momo oumu rerekē.
- Te Whai Hua o te Utu me ngā Painga Taiao
- Ngā Painga Ōhanga: Ahakoa te nui ake o ngā utu mō ia wae, ka whakaitihia ngā whakapaunga katoa e te roa o te ora o ngā irahiko karāhe me te iti o te whakapaunga pūngao, inā koa mō te hanga tonu i roto i te tauine nui.
- He Āhuatanga Taiao: Ki te whakaritea ki ngā hiko parahi, he iti ake te parahanga ka puta mai i te hanga karāpeti, ā, ka taea te hangarua, e hangai ana ki ngā au auahatanga matomato.
Whakataurite i ngā horopaki tono
- Te Hanga Rino EAF: Ko ngā irahiko karāpiti te nuinga o te wā, inā koa i roto i ngā EAF mana-tino-tiketike (UHP), e tutuki ai ngā hiahia mō te whai huatanga, te penapena utu, me te whakaputanga nui.
- Ētahi Atu Whakamahinga: Ahakoa ka taea e ngā momo huarahi kē te whakakapi i ngā irahiko karāpeti i roto i ngā oumu ātete, oumu whakapūngao rānei nā te utu, nā ngā whakaritenga tukanga rānei, kāore e taea te whakakapi i roto i ngā EAF.
Whakamutunga
Ko te kaha o ngā irahiko karāpiti—te kawe hiko teitei, te ātete wera, te pumau matū, te pakari miihini, te hoahoa mama, me ngā painga ōhanga/taiao—he mea nui mō te hanga maitai EAF. Ka pā tika tā rātou mahi ki te pai o te hanga maitai, ngā utu, me te kounga o te maitai, ka whakaū i tā rātou tūranga hei wāhanga nui i roto i ngā ahumahi maitai hou.
Wā tuku: Hōngongoi-07-2025