Mō ngā momo hua hiko waro me te karāpeti rerekē, e ai ki ō rātou whakamahinga rerekē, he whakaritenga whakamahinga motuhake me ngā tohu kounga. Ina whakaarohia te momo rauemi mata e tika ana kia whakamahia mō tētahi hua, me ako tuatahi tātou me pēhea te whakatutuki i ēnei whakaritenga motuhake me ngā tohu kounga.
(1) Te kōwhiringa o ngā rauemi mata mō te hiko karāti e whakamahia ana i roto i ngā tukanga hiko whakarewa pēnei i te hanga maitai EAF.
Ko te hiko karāte kawe hiko e whakamahia ana i roto i ngā tukanga hiko whakarewa pēnei i te hanga maitai EAF me whai kawe hiko pai, he kaha miihini tika, he ātete pai ki te tinei me te whakamahana i te pāmahana teitei, he ātete ki te waikura me te iti o te poke.
① Ka hangaia ngā irahiko karāhe kounga teitei mai i te kōka hinu, te kōka pīti me ētahi atu rauemi mata iti te pungarehu. Heoi, me nui ake ngā taputapu, me roa te rere o te tukanga me te hangarau uaua mō te hanga i te irahiko karāhe, ā, ko te kaha e pau ana i te 1 tāra irahiko karāhe he 6000 ~ 7000 kW · H.
② Ka whakamahia te kōka anthracite kounga teitei, te kōka whakarewa rānei hei rauemi mata hei hanga i te hiko waro. Kāore e hiahiatia he taputapu whakakāwhata mō te hanga hiko waro, ā, he rite tonu ngā tukanga whakaputa ki te hanga hiko karāpiti. He kino rawa atu te kawe hiko o te hiko waro i tērā o te hiko karāpiti. Ko te ātete o te hiko waro he 2-3 ngā wā teitei ake i tērā o te hiko karāpiti. Ka rerekē te ihirangi pungarehu i runga i te kounga o ngā rauemi mata, tata ki te 10%. Engari i muri i te horoinga motuhake, ka taea te whakaiti i te ihirangi pungarehu o te anthracite ki raro iho i te 5%. Ka taea te whakaiti i te ihirangi pungarehu o te hua ki te tata ki te 1.0% mēnā ka whakakāwhatatia anō te hua. Ka taea te whakamahi i te hiko waro mō te whakarewa i te maitai EAF noa me te ferroalloy.
③ Mā te whakamahi i te karāpiti tūturu hei rauemi mata, ka hangaia te hiko karāpiti tūturu. Ka taea anake te whakamahi i te karāpiti tūturu i muri i te whiriwhiringa āta me te whakaiti i te nui o te pungarehu. Ko te ātete o te hiko karāpiti tūturu e rua pea te nui atu i te hiko kua whakakārāpitihia. Engari he iti te kaha ā-pūkaha, he ngāwari ki te pakaru i te wā e whakamahia ana. I te rohe e nui ana te hanga karāpiti tūturu, ka taea te hanga i te hiko karāpiti tūturu hei whakarato i te EAF iti hei whakarewa i te maitai EAF noa. Ina whakamahia te karāpiti tūturu hei hanga hiko kawe, he ngāwari ki te whakaoti me te matatau i ngā taputapu me ngā hangarau.
④ Ka whakamahia te irahiko karāpiti hei whakaputa i te irahiko kua whakahoutia (te irahiko pakaru kua whakakārāpitihia rānei) mā te kuru me te huri i ngā para tapahi, i ngā hua para rānei. Kāore i te teitei te nui o te pungarehu o te hua (tata ki te 1%), ā, he kino ake tōna kawe hiko i te irahiko kua whakakārāpitihia. Ko tōna ātete he tata ki te 1.5 ngā wā o te irahiko kua whakakārāpitihia, engari he pai ake tōna pānga tono i te irahiko karāpitihia tūturu. Ahakoa he ngāwari ki te mōhio ki te hangarau me ngā taputapu hei whakaputa i te irahiko kua whakahoutia, he iti noa te pūtake rauemi mata o te whakakārāpitihia, nō reira ehara tēnei huarahi i te huarahi whanaketanga.
Wā tuku: Pipiri-11-2021