Study on corrosion mechanism of RH immersion tube castable
Journal Title: Science Paper Online - Year 2009, Vol 4, Issue 11
Abstract
Corrosion mechanism of RH immersion tube castable is yet to be revealed due to few studies on the reactions between RH immersion tube castable and molten slag. In this paper, according to the phase equilibrium theory and the thermomechanical theory, the mechanism of molten slag corrosion was studied by thermomechanical analysis of the reactions between the RH immersion tube castable and the molten slag. The results showed that the SiO2 powder and α-Al2O3 powder in the Al2O3-MgO castable had two-fold effects. Hence, the addition amount of Al2O3-MgO castable should be properly controlled, meanwhile, the addition of the cement binder should be minimized. The viscosity of the molten slag was changed with the chemical reactions between the compositions of the molten slag. When the slag viscosity increased, the molten slag was easy to build up onto the RH immersion tube; the slag viscosity decreased while a large number of low melting point phases arose, which made the RH immersion tube vulnerable to penetration and erosion by slag. The low melting point phases, which were generated by the reaction between the molten slag and RH immersion tube castable, melted into the slag and lead to corrosion of the RH immersion tube, while the high melting point phases built up onto the RH immersion tube.
Authors and Affiliations
Caiyun Lu, Min Chen, Zhongqiang Sun
Keywords
Related Articles
- EP ID EP154998
- DOI -
- Views 110
- Downloads 0
Synthesis, characterization and zwitterionic properties of diblock polyampholyte poly[(N,N-dimethylamino)ethyl methacrylate]-block-poly(acrylic acid)
Diblock copolymer poly[(N,N-dimethylamino)ethyl methacrylate]-block-poly(acrylic acid) (PDMA-b-PAA) with a low polydispersity (PDI=1.23) has been synthesized by atom transfer radical polymerization (ATRP). The zwitterion...
一种新型全集成CMOS低噪声放大器优化设计方法
提出一种以几何规划作为全局搜索算法的全集成低噪声放大器优化方法。在优化过程中，将功耗、输入匹配、器件尺寸等性能参数表示为约束条件，将片上电感寄生电阻噪声和晶体管噪声表示为优化目标，从而将复杂的全集成LNA优化问题转化为一个...
图像重建的分块迭代算法
图像重建重新投影(Reconstruction Re-projection)的迭代算法已在投影视野受限（Limited Field of View, LFOV）的情况下使用。视野受限情况下投影数据被截断。此处投影采用平行光束，扇形光束或锥形光束。该迭代算法对消除由于投影数据某...
纳米In2O3-TiO2光催化膜的表征及降解甲苯研究
本文采用溶胶－凝胶法制备了纳米In2O3-TiO2复合溶胶，经多次镀膜得到以铝片为载体的纳米In2O3-TiO2复合膜，以空气中的甲苯为模拟污染物，考察了其光催化性能。结果表明，In2O3的复合对TiO2光催化活性起到促进作用，n(In2O3)/n(TiO2)=0.04...
High-speed architecture design of integer motion estimation for H.264/AVC
As the latest video coding standard, H.264 significantly outperforms previous standards. The price is that the computation of motion estimation increase by times. For meeting the requirement of huge computation, this pap...