Xidhiidhka u dhexeeya sifooyinka jirka iyo kiimikaad ee electrodes graphite iyo isticmaalka birta foornada korontada

Bir-samaynta foornada korontada ku shaqeysa waxay ku saleysan tahayelectrodesin la abuuro arcs, si tamarta korontadu ay u beddesho tamarta kulaylka ee arc, dhalaalidda culeyska foornada iyo ka saarida wasakhda sida baaruudka iyo fosfooraska, iyada oo lagu daro walxaha lagama maarmaanka ah (sida kaarboon, nikkel, manganese, iwm) si loo dhalaaliyo birta ama alloy leh sifooyin kala duwan. Kuleylinta tamarta korantada waxay si sax ah u xakameyn kartaa heerkulka foornada waxayna soo saartaa gaaska qashinka heerkulka hooseeya. Hufnaanta kulaylka foornada birta samaynta ee arc way ka sarraysaa tan beddelaha.

Horumarinta tignoolajiyada waxay leedahay taariikh ku saabsan 100 sano oo EAF steelmaking, in kasta oo hababka kale had iyo jeer la kulmaan caqabadaha steelmaking iyo tartanka, gaar ahaan waxtarka sare ee Ogsajiinta saamaynta steelmaking, laakiin saamiga wax soo saarka birta EAF steelmaking dunida soo saarka birta ayaa weli kor u kacaya sanadba sanadka ka dambeeya. Horraantii 1990-meeyadii, birta ay soo saartay EAF ee adduunka ayaa ku xisaabtantay 1/3 wadarta guud ee wax soo saarka birta. Wadamada qaarkood, EAF waxay ahayd tignoolajiyada ugu weyn ee samaynta birta ee wadamada qaar, iyo saamiga birta ay soo saarto EAF dhalada waxay 70% ka sarraysay ta Talyaaniga.

Sanadihii 1980-meeyadii, ku baahsanaa wax soo saarka birta EAF ee shubista joogtada ah, oo si tartiib tartiib ah u sameeyay "nidaamka wax soo saarka tamarta badbaadinta ee foornada koronto ee preheating preheating koronto oo dhalaalaysa sifaynta joogtada ah ee shubka joogtada ah, foornada arc waxaa inta badan loo isticmaalaa qashinka degdega ah ee qalabka sida alaabta ceeriin ee birta samaynta. iyo dheelitir la'aanta hadda iyo saamaynta ba'an ee shabagga korantada iyo cilmi-baarista foornada DC, oo la geliyo codsiga warshadaha Qarnigii ugu horreeyayBartamihii 1990-meeyadii, foornada DC arc iyadoo la adeegsanayo kaliya 1 xidid ee korantada graphite ayaa si weyn looga isticmaalay adduunka 90-meeyadii (2 oo leh qaar ka mid ah foornada garaafyada garaafyada DC).

Si weyn loo yareeyo isticmaalka electrodes graphite waa faa'iidada ugu weyn ee foornada DC arc, ka hor dhamaadka 1970-meeyadii, foornada AC arc per ton of isticmaalka birta ee graphite electrode in 5 ~ 8kg, graphite qiimaha electrode xisaabiyay 10% ee wadarta qiimaha birta ilaa 15%, inkastoo la qaaday tiro ka mid ah tallaabooyinka dhimis, si wax soo saarka electrode 6. waxaa lagu xisaabiyaa 7% 10%, isticmaalka awoodda sare iyo habka ultra sare ee steelmaking, electrode yak waa la dhimay ilaa 2 ~ 3k.g / T steel, DC foornada arc kaas oo isticmaala kaliya 1 graphite electrode, isticmaalka electrode graphite waa la dhimi karaa ilaa 1.5kg / T steel hoostiisa.

Aragtida iyo dhaqanka labaduba waxay muujinayaan in hal-isticmaalka korantada garaafyada lagu dhimi karo 40% ilaa 60% marka la barbar dhigo foornada AC.