Iyada oo la kordhinayo shuruudaha tayada ee birta shubka ah, isticmaalka aluminium ee deoxidation ee qaar ka mid ah shubista heerka sare ma buuxin karto shuruudaha. Sidaa darteed, isticmaalka aluminium iyo kalsiyum isku-darka deoxidation ayaa helay fiiro gaar ah.
Deoxidation kama dambaysta ah, isku dhafka aluminium iyo kalsiyum ma aha oo kaliya in la yareeyo oksijiinta ku jirta birta, laakiin sidoo kale waxay hagaajinaysaa wasakhda aan birta ahayn.
Sababtoo ah cufnaanta kaalshiyamku waa 1/5 oo kaliya ee birta, barta karkaraya waa 1492â, taas oo ka hooseysa heerkulka birta dhalaalaysa, shaqadeeduna aad bay u xoog badan tahay, markaa way adagtahay in si sax ah loo xakameeyo marka la isticmaalo. ee birta samaynta. Xayiraaddani waxay xaddidday caannimada iyo adeegsiga kaalshiyamka ee birta shubka ah.
20kii sano ee la soo dhaafay, fahamka doorka calcium ee birta ayaa la sii qoto dheereeyay, habka codsiga ayaa si tartiib tartiib ah u koray. Hadda, si weyn ayaa loo isticmaalay.
