THERMOCHEMICAL MODELING OF REFRACTORY CORROSION IN SLAGGING COAL GASIFIERS IN SUPPORT OF DEVELOPMENT OF IMPROVED REFRACTORY MATERIAL
作者： James Bennett , Cynthia Powell , Kyei-Sing Kwong , Arthur Petty , Theodore M Besmann
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摘要: Slagging coal gasifiers suffer from significant attack by the slag on refractory liner. To better understand corrosive interactions were thermochemically simulated. The is observed to penetrate refractory, which complicates modeling phase behavior of slag-penetrated interior refractory. address this issue a simple strategy was adopted such that step-wise changes in composition with decreasing content assumed account for compositional as penetrates at least partially through its thickness. thermochemical equilibrium calculations following typically yielded three solution phases well stoichiometric crystalline AlPO4, Ca3(PO4)2, and (MgO)(Cr2O3), depending composition/penetration. In addition, under some conditions liquid miscibility gap exists two liquids co-exist.
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