Mullite bricks muaj thermal shock tsis kam, tiv taus txias thiab kub kub, thiab tsis yooj yim rau tev tawm. Tsawg creep siab alumina bricks muaj tsawg creep tus nqi nyob rau hauv qhov kub thiab txias ib puag ncig, zoo-kub stability, tsis yooj yim rau deform, thiab kuj tseem ruaj.
Cov txheej txheem ntau lawm ntawm mullite cib zoo ib yam li cov siab alumina refractory cib. Synthetic mullite clinker yog siv los ua cov khoom siv, thiab cov hmoov zoo yog hluavtaws mullite clinker, los yog cov hmoov sib xyaw zoo sib npaug rau mullite yog npaj los ntawm kev siv dawb corundum, quartz hmoov, thiab av nplaum ntshiab. Sib tov cov khoom siv granular thiab hmoov zoo hauv kev faib ua feem, nrog rau kev siv feem ntau ntawm 45% mus rau 55% rau cov khoom siv granular thiab 55% mus rau 45% rau cov hmoov zoo (<0.088mm). After uniform mixing, high-pressure molding. The firing temperature is 1550-1600 ℃. When using electric melting to synthesize mullite clinker as granular material, its firing temperature should be greater than 1700 ℃.
Dab tsi yog thermal shock resistance?
Cov nyhuv ntawm qhov kub hloov pauv ntawm cov cib refractory hu ua thermal shock lossis thermal shock. Lub peev xwm ntawm refractory bricks los tiv thaiv kub hloov ceev yam tsis muaj kev puas tsuaj yog hu ua lawv thermal shock resistance los yog thermal shock stability, abbreviated li thermal stability. Thermal shock puas yog ib qho ntawm ob qho tseem ceeb ntawm kev puas tsuaj rau refractory bricks, yog li ntawd, thermal shock resistance ntawm refractory bricks yog ib qho tseem ceeb cov cuab yeej. Yuav ua li cas kom raug tus cwj pwm thiab ntsuas qhov thermal shock tsis kam ntawm refractory bricks yog ib qho teeb meem tseem ceeb tab sis nyuaj. Txawm hais tias muaj ntau txoj haujlwm tau ua tiav, tseem tsis tau lees paub thoob ntiaj teb txoj kev zoo. Vim lub fact tias thermal shock kuj yog ib qho tseem ceeb ntawm refractory bricks, ntau txoj kev yog feem ntau siv nyob rau hauv kev tshawb fawb thiab cov khoom zoo kuaj los txiav txim lub thermal shock kuj ntawm refractory bricks.
Mullite bricks feem ntau muaj impurities thiab oxides xws li TiO2, Fe2O3, CaO, MgO, K2O, thiab Na2O. Cov ntsiab lus impurity hauv mullite tsim los ntawm cov khoom siv raw yog siab dua li cov khoom siv hluavtaws hluavtaws.
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