Lub refractoriness ntawm ib lub cib refractory tsis zoo ib yam li lub melting point, uas yog qhov kub ntawm cov kua thiab cov theem ntawm cov crystalline lub cev nyob rau hauv equilibrium. Feem ntau ntawm cov cib refractory yog cov khoom siv ntau theem uas tsis yog homogeneous, tsis muaj qee qhov melting point, refractory bricks pib tshwm liquefaction kom tiav melting yog ib tug gradual txheej txheem, nyob rau hauv ib tug ntau yam ntawm kub kub, solid-kua theem coexist.
Yog li ntawd, yog tias koj xav qhia cov cib refractory ntawm qhov kub thiab txias ntawm softening thiab melting ntawm cov pov thawj tshwj xeeb, tsuas yog ntsuas los ntawm refractoriness. Yog li ntawd, lub refractoriness yog ib tug multi-theem lub cev mus cuag ib tug tshwj xeeb degree ntawm softening kub.
Txawm hais tias lub refractoriness yog ib qho tseem ceeb qhia txog kev ntsuam xyuas refractory bricks, nws tsis tuaj yeem siv raws li qhov txwv ntawm qhov kub ntawm refractory bricks. Qee qhov feem ntau siv refractory bricks refractoriness yog raws li nram no:
1, av nplaum cib 1610 ~ 1750 degree
2, Silica cib 1690 ~ 1730 degree
3, Crystalized silica 1730 ~ 1770 degree
4, Cov av nplaum tawv 1750 ~ 1770 degree
5,High-alumina refractory bricks >1770 ~ 2000 degree
6, Magnesia refractory cib ＞ 2000 degree
7, Dolomite refractory cib ＞ 2000 degree
Yog tias koj txaus siab rau cov khoom siv refractory, tiv tauj peb tam sim no!
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