Ibyiza: Byatewe ahanini n'imbaraga zidasanzwe. Imbaraga zo gukurura no gukandagira z'icyuma ziruta cyane iz'ibikoresho nka sima, kandi ibice bizagira igice gito cyo gukandagiraho umutwaro umwe; uburemere bw'icyuma ni igice kimwe cya gatatu kugeza kuri kimwe cya gatanu cy'ubw'inyubako za sima, bishobora kugabanya cyane ibisabwa ku bushobozi bwo gutwara umusingi, bityo bikaba bikwiye cyane ku mishinga iri ku butaka bworoshye. Icya kabiri, ni imikorere myiza cyane mu bwubatsi. Ibice birenga 80% bishobora gushyirwa mu nganda hakoreshejwe uburyo busanzwe kandi bigateranywa aho hantu hakoreshejwe imigozi cyangwa isudira, ibi bishobora kugabanya uruziga rw'ubwubatsi ku kigero cya 30% ~ 50% ugereranyije n'inyubako za sima. Icya gatatu, ni byiza mu nyubako zirwanya umutingito n'icyatsi kibisi. Ubukomere bwiza bw'icyuma bivuze ko gishobora kwangirika no gukurura ingufu mu gihe cy'umutingito bityo urwego rwacyo rwo kurwanya imitingito rukaba ruri hejuru; Byongeye kandi, hejuru ya 90% by'icyuma gikoreshwa, ibi bigabanya imyanda y'ubwubatsi.
ImbogamiziIkibazo nyamukuru ni ukwirinda kwangirika. Guhura n'ubushuhe bwinshi, nko gusukura umunyu ku nkombe bitera ingese mu buryo busanzwe, akenshi bigakurikirwa no kubungabunga irangi rirwanya ingese buri myaka 5-10, ibyo bikaba byongera ikiguzi cy'igihe kirekire. Icya kabiri, ukwirinda kwabyo umuriro ntabwo bihagije; imbaraga z'icyuma zigabanuka cyane iyo ubushyuhe burenze 600°C, irangi ribuza umuriro cyangwa irangi ririnda umuriro rigomba gukoreshwa kugira ngo harebwe ibisabwa bitandukanye byo kwirinda inkongi mu nyubako. Byongeye kandi, ikiguzi cya mbere ni kinini; ikiguzi cyo kugura no gutunganya ibyuma ku nyubako nini cyangwa ndende kiri hejuru ya 10%-20% ugereranyije n'inyubako zisanzwe za sima, ariko ikiguzi cy'ubuzima bwose gishobora kugabanywa no kubungabunga bihagije kandi bikwiye igihe kirekire.
