Raws li cov ntsiab lus thiab kev ua haujlwm ntawm ntau yam tshuaj lom neeg hauv cov khoom siv refractory, lawv feem ntau muab faib ua peb pawg: cov khoom tseem ceeb, cov khoom tsis huv thiab cov khoom siv ntxiv. Cov impurities hais txog cov khoom siv tshuaj uas txawv ntawm cov khoom tseem ceeb hauv cov khoom siv refractory thiab muaj cov ntsiab lus me me. Cov khoom no feem ntau ua rau muaj kev puas tsuaj rau qhov kub thiab txias tsis kam ntawm cov cib refractory. Feem ntau ntawm cov tshuaj tiv thaiv no yog nqa los ntawm cov khoom siv raw uas muaj cov khoom tseem ceeb.
Cov khoom tseem ceeb ntawm refractory bricks yog feem ntau, thiab nws plays lub luag hauj lwm txiav txim siab nyob rau hauv qhov kub thiab txias ntawm cov khoom. Refractory bricks muaj qhov kub thiab txias tsis kam thiab ntau cov ntaub ntawv refractory tag los yog nyob ntawm lawv cov khoom tseem ceeb. Yog li ntawd, cov khoom tseem ceeb ntawm refractories yuav tsum tau them sai sai rau. Feem ntau hais lus, cov ntaub ntawv refractory raug cais raws li lawv cov tshuaj muaj pes tsawg leeg.
Ntau cov ntaub ntawv refractory ntawm tib cov khoom raug muab faib ua ob peb qib, thiab tag nrho los yog feem ntau yog txiav txim siab raws li hom thiab cov ntsiab lus ntawm lawv cov khoom tseem ceeb. Cov khoom tseem ceeb ntawm cov khoom siv refractory yog cov khoom siv yooj yim lossis cov khoom sib txuas nrog cov ntsiab lus melting siab lossis siab decomposition kub thiab siab lattice zog. Txiav txim siab qhov tso zis ntawm refractory bricks raws li tus nqi ntawm refractory bricks thiab cov nqi ntawm lwm refractory bricks.
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