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 sameeyo arcs, si tamarta korontada loogu beddelo tamarta kulaylka ee arc, dhalaalida culeyska foornada iyo ka saarida wasakhda sida baaruudka iyo fosfooraska, ku dar walxaha lagama maarmaanka ah (sida kaarboon, nikkel, manganese, iwm.) si ay u dhalaaliyaan birta ama alloy oo leh hanti 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 Tiknoolajiyadu 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 ee dunida ka soo saarka birta ayaa weli kor u kacaya sanadka. sanadka. 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 hab-soo-saar tamar-badbaadin ah oo ah foorno koronto ah oo preheating ah oo dhalaalaysa sifaynta shubka joogtada ah ee duubista joogtada ah, foornada arc waxaa inta badan loo adeegsadaa qashinka degdega ah ee qalabka sida ceeriin. walxaha birta-samaynta. Si asal ahaan looga gudbo awoodda aadka u sarreysa ee AC foornada arc arc xasillooni darro, sahay koronto oo saddex waji ah iyo dheelitir la'aanta hadda iyo saameynta daran ee korantada 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 u yareeya isticmaalka electrodes graphite waa faa'iidada ugu weyn ee foornada DC, ka hor dhamaadka 1970-meeyadii, foornada AC arc per ton of isticmaalka birta ee electrode graphite ee 5 ~ 8kg, kharashka electrode garaafyada ayaa lagu xisaabiyay 10% wadarta qiimaha ee birta ilaa 15%, in kasta oo la qaaday tiro tallaabooyin ah, si isticmaalka graphite electrode hoos u dhacay 4 6kg, ama kharashka wax soo saarka ayaa lagu xisaabiyaa 7% 10%, isticmaalka awoodda sare iyo habka steelmaking awoodda ultra sare, electrode yak waa la dhimay. ilaa 2 ~ 3k.g / T birta, foornada DC arc oo adeegsata kaliya 1 graphite electrode, isticmaalka korantada graphite waa la dhimi karaa ilaa 1.5kg / T birta hoos timaada.

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