Ii-electrode zegrafiti zezona zinto ziphambili ekwenzeni intsimbi yenkqubo emfutshane (ukwenza intsimbi yesithando sombane se-arc), kunye neendima zazo ezibalulekileyo ezibonakala kwiinkalo ezine eziphambili: ukuqhuba kombane kunye nokudluliselwa kobushushu, ukuzinza kwenkqubo, ukuphucula ukusebenza kakuhle, kunye nokuzivumelanisa nokusingqongileyo. Uhlalutyo oluneenkcukacha lulandelayo:
I. Ukuhanjiswa koMbane kunye nokuThunyelwa koBushushu: "Isiguquli samandla" seZithando zoMbane ze-Electric Arc
Ukwenza intsimbi okwenziwa ngexesha elifutshane kusebenzisa intsimbi elahliweyo njengezinto eziluhlaza, ukuyinyibilikisa nokuyicoca ibe yintsimbi ngokusebenzisa ii-electric arc furnaces (EAF). Njengezinto eziqhuba umbane, imisebenzi ephambili yee-graphite electrodes yile:
- Ukuhanjiswa kwamandla ombane: Ii-electrode zegrafiti zingenisa amandla ombane aphezulu kwi-oven, zivelisa ii-arcs zombane ezishushu kakhulu (ezidlula i-4,000°C) phakathi kwee-electrode kunye nentsimbi ekrazukileyo, zinyibilikisa ngokuthe ngqo i-scrap.
- Ukudluliselwa kobushushu okuSebenzayo: Ukuhanjiswa kobushushu okuphezulu kwegraphite (malunga ne-100–200 W/(m·K)) kuqinisekisa ukudluliselwa kobushushu ngokukhawuleza ukusuka kwi-arc yombane ukuya kwitshaja yesithando somlilo, okunciphisa amaxesha okunyibilika kunye nokunciphisa ukusetyenziswa kwamandla.
- Ukumelana nobushushu obuphezulu: I-Graphite inendawo yokunyibilika engaphezulu kwama-3,500°C, ephezulu kakhulu kunamaqondo obushushu okwenza intsimbi (malunga ne-1,600–1,800°C), nto leyo evumela ukusebenza okuzinzileyo ixesha elide ngaphandle kokunyibilika nokuqinisekisa ukwenziwa kwentsimbi rhoqo.
II. Uzinzo lweNkqubo: “I-Anchor” kwiimeko eziGqibeleleyo zokusebenza
Indawo yokwenza intsimbi yesithando sombane inzima kakhulu, kwaye ii-electrode zegrafiti ziqinisekisa uzinzo lwenkqubo ngezi mpawu zilandelayo:
- Ukumelana Nokutshatyalazwa Ngobushushu: I-coefficient ephantsi yeGraphite yokwandiswa kobushushu (malunga ne-1–2 × 10⁻⁶/°C) ivumela ukuba imelane notshintsho olukhulu lobushushu ngexesha lokuqalisa kunye nokucima kwe-arc yombane (ukusuka kubushushu begumbi ukuya kwi-4,000°C), ithintela ukuqhekeka okanye ukwaphuka.
- Uzinzo lweeKhemikhali: I-Graphite ayisebenzi kakhulu xa isetyenziswa kwizixhobo zesithando (intsimbi ekrwada, ii-alloys, njl.njl.) kumaqondo obushushu aphezulu, nto leyo enciphisa ukungcola nokuqinisekisa ubunyulu bentsimbi.
- Amandla Oomatshini: Ii-electrode zegrafiti ezinamandla aphezulu zinokumelana namandla e-arc, iimpembelelo ezivela kwiintlawulo zesithando somlilo, kunye noxinzelelo loomatshini ngexesha lokuphatha, nto leyo enciphisa amazinga okuphuma.
III. Ukuphucula Ukusebenza Kakuhle: "Isikhawulezisi" sokwenza intsimbi yeenkqubo ezimfutshane
Ukusebenza kwee-electrode ze-graphite kuchaphazela ngokuthe ngqo ukusebenza kakuhle kwentsimbi kunye neendleko:
- Ukusebenza kakuhle koMbane: Ukumelana okuphantsi kombane kweGraphite (malunga ne-10⁻⁴ Ω·cm) kunciphisa ukulahleka kwamandla ombane, kuzinzisa ukutsha kwe-arc, kwaye kwandisa isantya sokunyibilika nge-10%–20%.
- Iinkcukacha Ezinokulungiselelwa Ngokwezifiso: Ububanzi kunye nobude be-electrode bunokulungiswa ukuze kuhlangatyezwane neemfuno zee-arc furniture zombane zeetoni ezahlukeneyo (umz., ii-electrode ze-Φ300–400 mm zee-furniture ezincinci kunye nee-electrode zamandla aphezulu kakhulu ze-Φ700–800 mm zee-furniture ezinkulu).
- Ukusetyenziswa Okuphuculweyo: Ukuqhubela phambili kwezobuchwepheshe kuye kunciphisa ukusetyenziswa kwe-graphite electrode ngetoni nganye yentsimbi ukusuka kwi-9.3 kg ngo-1960 ukuya kwi-2.82 kg ngo-1994, nto leyo eyehlisa kakhulu iindleko zokwenza intsimbi.
IV. Ukulungelelaniswa Kwendalo: "Isixhobo Esibalulekileyo Sokwenza Intsimbi Eluhlaza"
Ukwenza intsimbi okwenziwa ngenkqubo emfutshane kuthatha indawo “yentsimbi eyomileyo + i-coke” nge “ntsimbi ekrwada + umbane,” kunciphisa ukukhutshwa kwekhabhoni malunga ne-75%. Kule meko, ii-electrode zegrafiti:
- Xhasa Amandla Acocekileyo: Zihambelana ngokugqibeleleyo nomzekelo we-“electric arc replacement coal” wesithando sombane, nto leyo eqhuba utshintsho oluphantsi kwekhabhoni kushishino lokwenza intsimbi.
- Nciphisa Ukukhutshwa Kokungcola: Xa kuthelekiswa nenkqubo ende ye-blast furnace-converter, i-electric arc furnace steelmaking inciphisa ukukhutshwa kwe-SO₂, i-NOx, kunye nothuli ngama-60%–80%. Njengenxalenye ephambili, ii-graphite electrodes zinegalelo ekufezekiseni iinjongo zokusingqongileyo.
- Khuthaza ukuHlaziya izixhobo: Isinyithi esikrwada sisebenza njengezinto ezikrwada ngqo zokusetyenziswa kwe-graphite electrode, senza umjikelo ovaliweyo we-“scrap steel-electric arc furnace-graphite electrodes” kwaye siphucula ukusetyenziswa kwezixhobo.
V. Ixabiso leSicwangciso: "Imali eNzima" kwiCandelo leMizi-mveliso leHlabathi
- Ubonelelo Olugxininisiweyo: Umthamo wemveliso ye-graphite electrode yehlabathi ugxile phakathi kwamashishini ambalwa eTshayina, afana neFangda Carbon, ebanga i-30% yamandla ehlabathi. ITshayina ibonelela ngemarike yehlabathi engaphezulu kwe-60%, iphethe impembelelo yesicwangciso.
- Izithintelo Eziphezulu Zobuchwephesha: Ii-electrode zegrafiti ezinamandla aphezulu kakhulu zifuna izinto eziluhlaza eziphezulu ezifana ne-needle coke kunye ne-modified pitch, kunye nemijikelo yemveliso ehlala iinyanga ezi-3-6. Imida yobuchwephesha ithintela abantu abatsha abangenayo.
- Impembelelo yeJoopolitiko: Ngowama-2025, iJapan yaqalisa uphando oluchasene nokulahla inkunkuma kwii-electrodes zegrafiti zaseTshayina, igxininisa ukubaluleka kwazo kweqhinga. ITshayina iqinise isikhundla sayo kwimarike ngezivumelwano ezifana neRegional Comprehensive Economic Partnership (RCEP) ngelixa ikhawulezisa uphando nophuhliso lwetekhnoloji ukuqinisa ukhuseleko lwekhonkco lemizi-mveliso.
Isiphelo
Ii-electrode zegrafiti ziye zaba zizinto ezibalulekileyo ekusetyenzisweni kwentsimbi yenkqubo emfutshane ngenxa yemisebenzi yazo emine ephambili: ukuqhuba umbane kunye nokudluliselwa kobushushu, ukuzinza kwenkqubo, ukuphucula ukusebenza kakuhle, kunye nokuzinza kokusingqongileyo. Ukuqhubela phambili kwezobuchwepheshe kunye nokuzinza kokubonelela kwii-electrode zegrafiti akuphembeleli nje kuphela iindleko kunye nokusebenza kakuhle kodwa kukwabumba kakhulu utshintsho oluphantsi kwekhabhoni kunye ne-geopolitical dynamics yeshishini lentsimbi yehlabathi. Ngenxa yokwanda kwenani lokwenza intsimbi ye-arc furnace yombane (iTshayina ijonge i-15%–20% ngo-2025), imfuno yemarike kunye nophuhliso lwetekhnoloji lwee-electrode zegrafiti ziya kuqhubeka zikhawuleza, zisebenza njenge "injini engabonakaliyo" yophuhliso olukumgangatho ophezulu kwishishini lentsimbi.
Ixesha leposi: Julayi-18-2025