Inani le-crystal nuclei liyancitshiswa xa i-eutectic crystallization yentsimbi etyhidiweyo inyibilika kwisithando somlilo esinyibilikayo.

Kwi-cupola smelting, ixesha elisuka ekunyibilikeni kwentlawulo ukuya ekuphumeni kwentsimbi etyhidiweyo kwisithando somlilo lifutshane kakhulu, malunga nemizuzu eyi-10. Xa kunyibilikiswa kwi ukuchithwa kwesithando somlilo, kuthatha ubuncinane iyure eli-1 ukusuka ekuqaleni kwentlawulo ukuya ekubetheni kwentsimbi, kwaye ikwanempembelelo ekhethekileyo yokufudumeza kwe-induction, enciphisa kakhulu izinto kwintsimbi etyhidiweyo enokusetyenziswa njenge-nucleus yangaphandle yegraphite. ngexesha le-eutectic crystallization. . Ngokomzekelo, i-SiO2, enokusetyenziswa njenge-crystal nucleus yangaphandle, inokusabela ngokulula kunye nekhabhoni kwintsimbi etyhidiweyo kwaye inyamalale xa ubushushu buphezulu kakhulu kwaye kukho impembelelo evuselelayo:

SiO2＋O2→Si＋2CO↑

Ngoko ke, xa unyibilikisa isinyithi esimpunga kwisithando somlilo se-induction, ingqalelo ekhethekileyo kufuneka ihlawulwe kunyango lwe-inoculation. Isixa se-inoculant kufuneka sibe ngaphezulu kancinci kunoko kwi-cupola yokunyibilikisa. Kungcono ukwenza i-pre-incubation (pre-inoculation) kwisithando somlilo ngaphambi kokuba ikhutshwe. Ukuphucula iimeko ze-nucleation ye-cast iron eutectic crystallization.