水煤浆气化炉煤渣对高铬砖侵蚀的热力学模拟  

Thermodynamics simulation on corrosion of high chrome bricks by gasifier slags

作　　者：赵世贤[1] 蔡斌利[1] 孙红刚[1] 李鹏涛[1] 闫双志[1] 石干[1] 王刚[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《耐火材料》2015年第1期13-16,共4页Refractories

基　　金：973计划前期研究专项(2012CB724607)

摘　　要：为了研究水煤浆气化炉工作过程中煤渣对高铬砖的侵蚀机制,对不同性质气化炉渣对高铬砖的侵蚀进行了热力学模拟计算。结果表明,酸性渣和碱性渣对高铬砖具有不同的侵蚀机制:酸性渣与高铬砖作用生成Fe Cr2O4相,且酸性渣不溶解砖中的Al2O3;碱性渣与高铬砖作用后同时生成Fe Cr2O4和Mg Cr2O4相,碱性渣能够溶解高铬砖中的部分Al2O3,可能增加碱性渣对高铬砖的渗入深度。同时,对在酸性渣中使用后的气化炉用高铬残砖进行了显微结构和相分析,证明与热力学模拟计算结果相吻合,说明热力学模拟计算能够对气化炉渣与耐火材料的相互作用机制、化学反应、复杂的物相形成进行评价和预测。The corrosion of high chrome bricks by different gasifier slags was thermodynamically simulated in order to research the corrosion mechanism of high chrome bricks by slag during the operation of gasifier.The simulated results indicate acid slag and basic slag have different corrosion mechanisms to high chrome bricks.FeCr2O4 forms in the reaction process between acid slag and high chrome bricks.Al2O3 in the brick is not dissolved by the acid slag.However,FeCr2O4 and MgCr2O4 form simultaneously after basic slag reacts with high chrome bricks,and basic slag dissolves part of Al2O3 in high chrome bricks,which may increase the penetration depth of basic slag in high chrome bricks.The microstructure and phase analysis of the used high chrome brick in acid slag are in accordance with the simulation calculation results,which show thermodynamic simulation is an effective method to evaluate and predict the corrosion mechanism,reaction and phase formation in the reaction process between gasifier slags and refractories.

关 键 词：热力学模拟 气化炉 煤渣 高铬砖 侵蚀机制 

分 类 号：TQ175[化学工程—硅酸盐工业]