作者：TOSHIHIRO SURUGA;TOSHIYUKI HOKII;KEISUKE ASANO;
作者單位：Technical Center, Krosaki Harima Corp. 1-1, Higashihama-machi, Yahatanishi-ku, Kitakyushu 806-8586
刊名：Journal of the Technical Association of Refractories
ISSN：0285-0028
出版年：2002-01-05
卷：22
期：4
起頁：319
止頁：322
分類號：TQ175
語種：英文
關鍵詞：
內容簡介Figure 10 shows the relation between the modulus of static elasticity and the maximum stress at room temperature and 1400 deg C. The fatigue static modulus seems have a decreasing trend with cyclic loading, while the fatigue maximum stress is increased slightly. The reason for the decrease in the static elastic modulus with cyclic loading at room temperature may be the macroscopic deterioration of the brick structure by the cyclic loading. Further investigation and discussion are necessary to consider reasons for the increase in the fatigue maximum stress associated with the decrease in the fatigue elastic modulus is not clear. In the case of the elevated temperature test, the fatigue elastic modulus of bricks A and B was significantly increased by the cyclic loading. The reason may be the strengthening of brick structure or the acceleration of sintering by the cyclic loading. For brick C, in both the initial test and the fatigue test, static modulus of elasticity and maximum stress of brick C were low. The reason for this result may be the partial release of some mechanical stress by the formation of liquid in the structure due to flux components, mainly SiO_2 in the electro-fused magnesia. Based on the evaluation of the above measurements, it is concluded that bricks having a small modulus of static elasticity, a high maximum stress and a high resistance against cyclic loading in the hot condition are the most suitable for decreasing damage by mechanical spalling induced by deformation in the shell of rotary kiln. It is conceivable that the material system of Brick C is near to these characteristics. In me future, putting these results to use, we intend to find out the optimum materials for a cement rotary kiln lining. They should also possess the important characteristics of excellent cement coating ability and corrosion resistance in addition to the above-mentioned properties.
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