Lub Melting Point ntawm Refractory Bricks yog dab tsi?

Dab tsi yog qhov melting point ntawm refractory bricks?

Cov av nplaum hluav taws yog siv los ua hom cib no. Cov av nplaum no tuaj yeem tiv taus qhov kub thiab txias yam tsis muaj kev hloov pauv hauv cov qauv zoo li melting lossis softening.

Cov av nplaum hluav taws yuav tsum muaj feem pua ​​​​ntawm 'tsis muaj kev puas tsuaj' silica thiab alumina. Lawv yuav tsum muaj tsawg heev ntawm cov txiv qaub, magnesium, hlau oxide, thiab alkalis.

Silica: Silica (SiO₂) ua mos ntawm txog 2800℉ thiab thaum kawg fuses thiab dhau los ua cov khoom iav ntawm txog 3200℉. Nws melts nyob ib ncig ntawm 3300℉. Qhov siab softening thiab melting point tau tsim nws ua cov khoom tseem ceeb rau kev tsim cov refractory cib.

Alumina: Alumina (Al₂O₃) muaj ntau dua softening thiab fusion kub dua silica. Nws melts ntawm txog 3800℉. Yog li ntawd, nws yog siv ua ke nrog silica.

Txiv qaub, Magnesia, Hlau oxide thiab Alkalis: Lub xub ntiag ntawm cov khoom tsis zoo no ua raws li cov fluxes kom txo cov softening thiab fusion kub.