Preparation cordierite-mullite composites with iron tailing

Cordierite-mullite composites were prepared by using iron tailing, burn talc, suzhou soil, knar clay and alumina powder as raw materials. The main influencing factors such as the molar ratio of cordierite to mullite, amount of iron tailing and calcination temperature were discussed. The microstructure of the sintered sample was analyzed with X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The results show that the optimal prescription was V sample (36.4635wt% of iron tailings, 13.6813 wt % of burn talc, 10.2154 wt % of suzhou soil, 3.8405 wt % of knar clay and 35.7984 wt% of alumina), and its sintered material contains about 50% of mullite and 50% of cordierite;The optimal sintered temperature was 1250 degrees C and the holding time was 2 hours. The bending strength of the sample is 29.79MPa and the thermal shock resistance expriments are above 60 times.