Abstract
In this paper, the influence of sintering temperature on the output rate of the mullite which was formed from andalusite ore of Mei County Shaanxi at different constant temperature 1350°C, 1450°C, 1550°C and the mechanism which mullite was transformed were studied. The morphology of mullite formed at 1450°C was obtained by SEM, and the phase composition of andalusite ore sintered at different temperature was analyzed by XRD. The results shows that the mullitization effect of andalusite ore of Mei County Shaanxi is excellent, and the yield of mullite mineral can reach the desired results of 100% after andalusite mineral of Mei County Shaanxi is kept warming for 3 hours at the sintering temperature of 1450°C and cooled naturally with box-type resistance furnace. The mullite phase synthesized by andalusite ore of Mei County Shaanxi depends on not only the decomposition of andalusite, but also the secondary mullitization and the dissolution mechanism.
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