The main raw materials for the production of mullite sillimanite bricks are synthetic mullite and sillimanite materials, which are obtained by high-temperature sintering. The product is divided into two grades: MG-65, MG-70, and MG-65 with Al2O3 65% and MG-70 with Al2O3 70%. The Fe2O3 content of the product is low, ranging from 0.8% to 1.0%, with high compressive strength above 1600 ℃, low rate of change in the firing line, 1500 ℃ * 2h 0~+0.5%, good thermal shock stability, and water cooling at 1100 ℃>20 gwaith. Nodwedd bwysicaf y cynnyrch yw ei wrthwynebiad gwisgo cryf a'i wrthwynebiad dyddodiad carbon. Fe'i defnyddir yn bennaf yn rhannau uchaf a chanol siafftiau ffwrnais chwyth ac odynau diwydiannol tymheredd uchel eraill ar gyfer ymwrthedd i oeri a gwresogi cyflym, gwrthsefyll gwisgo, a meysydd eraill.
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