Domestic petroleum, sinadarai da sauran masana'antu na makamashi suna buƙatar adadi mai yawa na ƙarancin zafin jiki don ƙira da samar da masana'antu daban-daban da na'urorin ajiya irin su gas mai ruwa, ammonia ruwa, oxygen ruwa da nitrogen ruwa.
Bisa shirin na shekaru biyar na kasar Sin karo na 12, za a inganta aikin samar da makamashin sinadari mai guba, kana za a kara saurin bunkasa albarkatun mai da iskar gas nan da shekaru biyar masu zuwa.Wannan zai ba da babbar kasuwa da damar ci gaba ga masana'antar samar da makamashi da samar da kayan aikin ajiya a ƙarƙashin ƙarancin sabis na sabis na zafin jiki, kuma zai haɓaka haɓakar ci gabanQ355D ƙananan zafin jiki resistant bututu rectangularkayan aiki.Kamar yadda ƙananan zafin jiki na bututu yana buƙatar samfurori don samun ƙarfin ƙarfi ba kawai ba amma har ma da ƙananan zafin jiki mai zafi, ƙananan ƙananan bututu suna buƙatar mafi girman tsabta na karfe, kuma tare da yanayin zobe na zafin jiki, tsabtar ƙarfe kuma ya fi girma.Q355Eultra-low zafin jiki murabba'in tubean haɓaka kuma an tsara shi.Za a iya amfani da karfen billet kai tsaye azaman bututun ƙarfe maras sumul don isar da tsarin.Tsarin masana'anta ya ƙunshi abubuwa uku masu zuwa:
(1)Electric Arc makera smelting: tarkace karfe da alade baƙin ƙarfe ana amfani da matsayinalbarkatun kasa, daga cikin abin da yatsa ya ƙunshi 60-40% kuma ƙarfe na alade yana da 30-40%.Yin amfani da fa'idodin babban alkalinity, ƙarancin zafin jiki da babban oxide baƙin ƙarfe na ultra-high power sa Electric arc makera, da tsananin zugawar oxygen decarburization ta dam oxygen gun a kan bangon tanderun, da kuma smelting na farko karfe-yin ruwa. tare da babban impedance da matsananci-high ikon sa wutar lantarki baka tanderu, da cutarwa abubuwa phosphorus, hydrogen, nitrogen da wadanda ba karfe inclusions a cikin narkakkar karfe za a iya yadda ya kamata.Karfe batu carbon na narkakkar karfe a cikin wutar lantarki baka tanderu <0.02%, phosphorus <0.002%;Deoxidation mai zurfi na narkakkar karfe ana aiwatar da shi a cikin aikin tanderun wutar lantarki, kuma ana ƙara A1 ball da carbasil don aiwatar da deoxidation.
Aluminum abun ciki a cikin narkakkar karfe ana sarrafa a 0.09 ~ 1.4%, don haka da cewa Al203 inclusions kafa a farkon narkakkar karfe da isasshen lokacin iyo, yayin da aluminum abun ciki na tube billet karfe bayan LF tacewa, VD injin jiyya da ci gaba da simintin gyaran kafa. ya kai 0.020 ~ 0.040%, wanda ke guje wa ƙari na Al203 da aka kafa ta hanyar iskar oxygen a cikin tsarin gyaran LF.The nickel farantin lissafin kudi na 25 ~ 30% na jimlar gami da aka kara wa ladle ga alloying;Idan abun ciki na carbon ya fi 0.02%, abun cikin carbon na ƙarfe mai ƙarancin zafin jiki ba zai iya biyan buƙatun 0.05 ~ 0.08%.Duk da haka, don rage iskar shaka na narkakkar karfe, ya zama dole don sarrafa iskar oxygen hurawa tsanani na tanderun bango gungu oxygen gun sarrafa carbon abun ciki na narkakkar karfe kasa 0.02%;Lokacin da abun ciki na phosphorus yayi daidai da 0.002%, abun da ke cikin phosphorus na samfurin zai kai fiye da 0.006%, wanda zai haɓaka abun ciki mai cutarwa abun ciki na phosphorus kuma yana shafar ƙarancin zafin jiki na ƙarfe saboda dephosphorization na phosphorus mai ɗauke da slag. daga tanderun wutar lantarki da kuma ƙari na ferroalloy yayin gyaran LF.Zazzabi na tanderun baka na lantarki shine 1650 ~ 1670 ℃, kuma ana amfani da bugun ƙasan eccentric (EBT) don hana slag oxide shiga tanderun mai tacewa LF.
(2)Bayan tacewa LF, mai ciyar da waya yana ciyar da 0.20 ~ 0.25kg/t tsantsar CA waya na karfe don hana ƙazanta kuma sanya abubuwan da aka haɗa a cikin narkakken ƙarfe ya zama mai siffar zobe.Bayan maganin Ca, ana busa narkakken ƙarfe da argon a ƙasan ladle na fiye da mintuna 18.Ƙarfin busawa na argon na iya sa ƙurawar ba ta fallasa ba, don haka abubuwan da ke tattare da su a cikin narkakken karfe suna da isasshen lokacin yin iyo, inganta tsabtar karfe, da kuma rage tasirin haɓakaccen yanayi a kan ƙananan tasirin zafi.Adadin ciyarwa na waya mai tsaftar CA ta kasa da 0.20kg/t karfe, abubuwan da aka haɗa ba za a iya hana su gabaɗaya ba, kuma adadin ciyarwar Ca waya ya fi 0.25kg/t karfe, wanda gabaɗaya yana ƙaruwa.Bugu da kari, lokacin da adadin ciyarwar layin Ca ya yi girma, narkakkar karfen yana tafasa da karfi, kuma jujjuyawar matakin narkakken karfe yana sa a tsotse karfen da aka narkar da shi kuma yana faruwa na biyu.
(3)Maganin injin VD: aika lf mai ladabi narkakkar karfe zuwa tashar VD don maganin injin, kiyaye injin a ƙasa da 65pa fiye da mintuna 20 har sai slag ya daina kumfa, buɗe murfin injin, sannan a busa argon a ƙasan ladle don busa a tsaye. narkakkar karfe.
Lokacin aikawa: Satumba-02-2022
