Ngā Tūranga Matua me te Tātari o te Coke Hinu Whakakākā i roto i te Tukanga Poto o te Umu Āwhata Hiko (EAF) me te Hanga Rino Waro-Iti
I. Rauemi Matua mō ngā Irahiko Karāpiti, e Tautoko ana i te Mahi Whai Hua o te Tukanga Poto EAF
1. Ngā Āhuatanga o ngā Rauemi Mata me te Hototahi o ngā Tukanga Ko te kōka hinu kua whakakāwhatia he hua i ahu mai i te kōka hinu kua whakakāwhatia i ngā pāmahana neke atu i te 2,500°C, e huri ana i tōna hanganga tioata mai i te āhua kore-āhua ki te āhua kōka hinu tino pai. He nui te kawe hiko, he nui te kawe wera, he ātete wera nui (ki te tu atu i ngā pāmahana neke atu i te 3,000°C), me te pumau matū. Nā ēnei āhuatanga he rauemi mata pai mō te hanga i ngā ira kōka hinu, koinei ngā wāhanga kawe matua i roto i te hanga maitai EAF.
2. Ngā Whakapainga Whai Hua i roto i te Hanga Rino Tukanga Poto Ko te tukanga poto EAF e whakamahi ana i te rino para hei rauemi matua, ka whakarewa tika, ka whakahāngai i ngā paru mā roto i ngā pewa hiko e hangaia ana e ngā irahiko karāhe. Ki te whakataurite ki te tukanga roa o te oumu pupuhi tuku iho (BF-BOF) (e hiahia ana ki te rino me te waro kōkō), ka whakakorea e te tukanga poto EAF te wāhanga hanga rino, ka whakaiti i te roa o te tukanga mā te neke atu i te 60%, ka tapahi i te whakapaunga pūngao mā te tata ki te 60%, ka whakaiti i ngā tukunga CO₂ mā te tata ki te 80%. He mahi nui tā ngā irahiko karāhe mahi-teitei e ahu mai ana i te hinu kōkō kua whakahāngaihia ki te karāhe i roto i tēnei tukanga:
- Te Arahi Hiko Teitei: Ka whakaiti i te ngaronga o te pūngao hiko, ka whakarei ake i te pai o te wera o te arc, ka whakapoto i ngā huringa whakarewa (hei tauira, ka whakaitihia e ngā EAF kuantum te wā whakarewa mā te 50% ki te whakaritea ki ngā tikanga tuku iho).
- Ātete Wera: Ka ātete ki ngā pāmahana tino kino i roto i ngā EAF, ka whakaiti i te whakamahinga hiko (hei tauira, ka whakaitihia e ngā eco-EAF te whakamahinga hiko mā te 57.5% i whakaritea ki ngā oumu tuku iho).
- Te Pūmautanga Matū: Ka ārai i ngā tauhohenga i waenga i ngā irahiko me te maitai rewa, te para rānei, kia mau ai te parakore o te maitai.
II. Te Ārahi i te Hanga Rino Waro-Iti: Te Huringa Kaiao mai i ngā Rauemi Mata ki ngā Tukanga
1. Te Whakakapinga i ngā Wahie Pūmua hei Whakaiti i ngā Tukunga Waro Ko te tukanga roa tuku iho e whakawhirinaki nui ana ki te waro hei wahie me te kaiwhakaiti, ka hua ake he kaha waro teitei. He rerekē, ko te tukanga poto EAF e whakamahi ana i te maitai para me te hiko hei pūtake pūngao, ka tutuki ai te whakakapinga "waro-ki-te-hiko" mā roto i ngā irahiko karāpiti i ahu mai i te hinu kōka kua whakakāhia. Mena ka whakakahangia e te pūngao whakahou (hei tauira, te rā, te hau rānei), ka taea te tata ki te kore tukunga waro. Hei tauira, ka whakamahia e ngā EAF taiao te pūngao matomato hei whakarewa i ngā rauemi mata waro-iti, ka whakaputa i ngā pire maitai me ngā hangarau "kāore e uru ana ki te waro" me te tata ki te kore tukunga CO₂.
2. Te Whakaora i te Wera Para me te Arotau i te Whai Hua o te Pūngao Mā te kawe wera teitei o te kōka hinu kua whakakāwhatia ka tautoko i te whakatinanatanga o ngā pūnaha whakaora wera para i roto i ngā EAF. Ka taea e ngā hau paipa puehu pāmahana teitei (e kawe ana i te 11–20% o te pūngao whakauru) te whakaora i te wera mā roto i ngā irahiko kāwhata, i ngā whakawhiti wera motuhake rānei mō te whakamahana para, te whakaputa hiko rānei, ka whakaiti nui i te whakapaunga pūngao. Hei tauira, mā te hangarau whakamahana para ka whakanui ake i te pāmahana para mai i te taiao ki runga ake i te 600°C, ka whakapoto i ngā huringa whakarewa mā te 15–20% me te tapahi i te whakapaunga hiko mō ia tana maitai mā te 36.95–40.22%.
3. Te Whakatairanga i te Whakamahinga Porowhita o ngā Rauemi Rino Para Ko te tukanga poto EAF, e whakakahangia ana e te kōka hinu kua whakakāwhatia, ka neke i te umanga rino mai i te tauira "rauemi-hua-para" rārangi ki te anga porowhita "rauemi-hua-rauemi hangarua". I te tau 2024, kua tutuki i ngā kamupene matua te whakaputa papatipu o ngā rino wera-wera tino-angiangi, tino-kaha, me te whakatutuki i ngā tono whakamama me te whakataurite i te utu me ngā painga taiao o te "rino matomato."
III. Ngā Whakapai Ake Hangarau me ngā Auahatanga o te Mākete: Kei te Tiaho te Uara "Hīrangi" o te Coke Hinu Whakapūkara
1. Te Piki Ake o te Hiahia mō ngā Hua Mahi-Tiketike I te whānui haere o ngā kaha EAF (hei tauira, ngā oumu neke atu i te 400 tana) me te ahu whakamua o ngā hangarau whakarewa (hei tauira, ngā EAF kuantum, ngā eco-EAF), ka piki ake te hiahia mō ngā irahiko karāhe kounga teitei. Ko te kōka hinu karāhe, hei rauemi mata nui, e anga atu ana ki te whakataetae nui ake mō te parakore (te nui o te pungarehu <0.5%), ngā whakakī maha (3–4 huringa), me te karāhe pāmahana tino teitei (te ātete <4 μΩ·m).
2. Te Whakaurunga o te Utu Kakariki me te Mekameka Tuku I raro i ngā whāinga "waro rua" a Haina, ka whakaitihia e ngā kaihanga kōka hinu kua whakakāwhatia ngā tapuwae waro mā te whakaputa pūngao matomato me te hokohoko waro, ka whiwhi "utu matomato" me te kukume mai i ngā kiritaki utu nui o te ao. Kei te whakawhānui poutū hoki ngā kamupene matua ki te hanga i ngā porowhita ahumahi whakauru e kapi ana i "ngā rauemi mata kōka-whakakāwhatia-ngā rauemi anode," te whakau i ngā mekameka tuku me te tapahi i ngā utu.
3. Kaupapa Here me te Tiputanga e Ārahihia ana e te Mākete Ko ngā Kaupapa Here pērā i ngā Aratohu a Haina mō te Whakatairanga i te Whakawhanaketanga Kounga-Teitei o te Ahumahi Rino e whakatenatena ana i te tango i te EAF, me te matapae ka piki ake ngā ōwehenga hanga rino EAF i te tau 2025. Hei rauemi mata matua mō ngā EAF, ka kite te kōka hinu kua whakakāwhatia i te tipu tonu o te mākete, ka akiaki i te ahumahi ki te mahi teitei ake me te whakaiti i ngā tukunga.
Wā tuku: Hanuere-14-2026