浮法玻璃熔窑蓄热室格子砖的损毁过程与选材

The Corrosion Processes and Selection of Refractories for the Regenerator Checker in Float Glass Furnace

借助SEM分析了目前浮法玻璃熔窑蓄热室常用格子体在使用过程中的损毁机制 ,结果表明 ,铝硅系和AZS格子体的损毁主要是受气体侵蚀介质中的Na、SO2 和Na2 SO4 蒸气等作用 ,产生霞石化或反霞石化的相变 ,伴随着的体积膨胀效应会使之产生裂纹、疏松和剥落 ;以方镁石为主晶相的格子体其损毁的原因应归因于高温环境中碱蒸气作用下方镁石的再结晶长大 ,以及中温条件下液态芒硝的侵蚀作用 ;同时 ,助燃空气换向产生的热震作用也可使格子体产生爆裂。文中还阐述了目前蓄热室格子体的选择方案。

It is analyzaed that the corrosion process for the regenerator checker of the float glass furnace by dint of the scanning electron microscope in this text. The aluminosilicate system brick and AZS checker are primarily etched by the ruining gas comprising Na, SO 2 and Na 2SO 4 etc. In this case, it is important cause for checker cracking that expanding effect of the nepheline and nosean produced by the phase transformation. The checkers made from the periclase as main crystal phase are cracked owing to high-temperature effect of periclase recrystal growth. At the same time, the checker spalling could occur resulting from thermal shock during alternation of combustion air. Selection of refractories for the regenerator checkers was expounded in the present article.