Cov muaj pes tsawg leeg thiab cov qauv sab hauv ntawm lub refractory cib nws tus kheej txiav txim siab nws hnav tsis kam. Yog hais tias cov khoom yog ib tug ntom polycrystal muaj li ntawm ib tug siv lead ua ib leeg, lub hardness ntawm cov ntxhia siv lead ua nws tus kheej txiav txim nws hnav tsis kam. Lub siab hnav tsis kam ntawm cov khoom qhia tau hais tias lub hardness ntawm cov siv lead ua yog siab. Thaum cov khoom siv lead ua tsis yog isotropic, cov nplej sab hauv yog me me thiab cov khoom hnav tsis kam yog siab heev; thiab thaum cov khoom tsim los ntawm ntau cov lus qhia, qhov ntim ntawm cov khoom nws tus kheej, ntom, porosity thiab bonding zog ntawm txhua feem txiav txim siab hnav tsis kam ntawm refractory bricks.
Yog li ntawd, rau ib yam ntawm cov refractory cib nyob rau hauv chav tsev kub, nws hnav tsis kam yog proportional rau nws compressive zog, thiab cov khoom uas zoo sintering kuj muaj zoo hnav tsis kam. Qhov hnav tsis kam ntawm cov khoom siv refractory muaj feem xyuam rau qhov kub thiab txias. Rau qee cov ntaub ntawv, xws li silicon-aluminium refractory khoom, nws yog feem ntau ntseeg hais tias nyob rau hauv ib tug tej yam kub thiab txias, xws li nyob rau hauv lub elastic ntau yam hauv qab no 700 ~ 900 degree, qhov siab dua qhov kub, qhov hnav tsis kam. nce, hnav tsis kam txo.
Thaum qhov kub thiab txias nce mus txog qhov siab tshaj plaws ntawm cov elastic modulus, qhov hnav tsis kam nce nrog qhov txo qis ntawm elastic modulus. Xws li cov khoom siv aluminium silicate refractory ntawm 1200 ~ 1350 degree, hnav tsis kam yog qhov zoo dua li cov nyob hauv chav sov. Thaum qhov kub thiab txias ntxiv mus rau saum 1400 degree, qhov hnav tsis kam txo qis vim qhov txo qis ntawm cov kua theem viscosity hauv cov khoom refractory. Qee cov cib refractory, xws li cov khoom siv chrome, ua rau lawv hnav tsis kam thaum kub nce. Qhov hnav tsis kam ntawm lub cib refractory yog nws lub peev xwm los tiv thaiv cov neeg kho tshuab puas ntawm nws qhov chaw los ntawm cov khoom, kua thiab plua plav-laden airflow.
Feem ntau, kev puas tsuaj rau saum npoo ntawm refractory bricks tshwm sim los ntawm kev siv tshuab yog feem ntau loj heev. Nws feem ntau yog qhov ua rau ncaj qha ntawm refractory cib coj los ntawm nws qhov chaw ua haujlwm. Qee lub sij hawm nws muaj kev phom sij ntau dua li kev tawm tsam tshuaj lom neeg, lossis yog tshwm sim los ntawm kev tawm tsam tshuaj lom neeg, feem ntau ua rau hnyav dua los ntawm kev siv tshuab. Piv txwv li, lub refractory cib hauv ob sab phlu thiab molten hlau ditch nyob rau hauv lub Upper ib feem ntawm lub moj tej tawg rauv feem ntau poob vim tsis txaus hnav tsis kam. Cov cib refractory hauv coke cub carbonization chamber kuj raug rau coke hnav. Lub qhov cub lub qhov ncauj ntawm lub steelmaking converter, lub qhov tapping thiab lwm qhov chaw uas cov huab cua scours thiab ntau yam molten kua ntws feem ntau poob vim tsis zoo hnav tsis kam ntawm cov khoom. Yog li ntawd, hnav tsis kam ntawm refractory bricks yog ib qho tseem ceeb ntawm cov khoom.
