CAJ | 학술논문

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FeCr2 O4相，且酸性渣不溶解砖中的 Al2 O3；碱性渣与高铬砖作用后同时生成 FeCr2 O4和 MgCr2 O4相，碱性渣能够溶解高铬砖中的部分 Al2 O3，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。
위료연구수매장기화로공작과정중매사대고락전적침식궤제，대불동성질기화로사대고락전적침식진행료열역학모의계산。결과표명，산성사화감성사대고락전구유불동적침식궤제：산성사여고락전작용생성FeCr2 O4상，차산성사불용해전중적 Al2 O3；감성사여고락전작용후동시생성 FeCr2 O4화 MgCr2 O4상，감성사능구용해고락전중적부분 Al2 O3，가능증가감성사대고락전적삼입심도。동시，대재산성사중사용후적기화로용고락잔전진행료현미결구화상분석，증명여열역학모의계산결과상문합，설명열역학모의계산능구대기화로사여내화재료적상호작용궤제、화학반응、복잡적물상형성진행평개화예측。
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 gasifi-er.The simulated results indicate acid slag and basic slag have different corrosion mechanisms to high chrome bricks.FeCr2 O4 forms in the reaction process between acid slag and high chrome bricks.Al2 O3 in the brick is not dissolved by the acid slag.However,FeCr2 O4 and MgCr2 O4 form simultaneously after basic slag reacts with high chrome bricks,and basic slag dissolves part of Al2 O3 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 re-sults,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.