Application of mullite material in rotary kiln
Mullite is a mineral produced by aluminosilicate at high temperature. It is composed of mullite material and silicon carbide material. It has low process temperature and requires wear resistance, corrosion resistance and good thermal shock performance. The mullite-silicon carbide composite prefabricated brick and the mullite-silicon carbide castable composite masonry method, and the refractory materials with different proportions in the high temperature section, improve the thermal stability of the refractory material and delay the formation of the ferrule The erosion and destruction of refractory materials slow down the ring-forming phenomenon and achieve good application results.
The way of refractory masonry has also been improved accordingly. The composite prefabricated bricks are welded and fixed on the kiln body by anchors, and the two rows of bricks are layered with light castables and wear-resistant castables to ensure the integrity, firmness and heat preservation of the refractory masonry. In the masonry process, in order to prevent the kiln body from being heavier, after the four rows of prefabricated bricks are finished, the kiln body is rotated, and the kiln body is turned to the top and then the next four rows are built. When finished, rotate the masonry in turn.
Through the above method, the interaction between the refractory material and the material is alleviated, and the ring-forming phenomenon is delayed. Moreover, the masonry method of using composite prefabricated bricks and wear-resistant castables strengthens the strength of the refractory material, and the damage to the refractory material is small when the loop is processed, and the maintenance period is short. Through practice, the maintenance cycle of refractory materials has been extended from the original 2 to 3 months to more than 1 year, which has improved the operating rate of rotary kiln and has significant economic benefits.
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