Papermaking black liquor contains Na2CO3, which can corrode refractory materials and cause economic losses. It is considered to introduce CaO and MgO alkaline oxides into Al2O3 to prepare calcium magnesium aluminum composite oxides as a substitute for Al2O3 as corrosion shell materials. Using the FactSage material balance module, the optimal ratio of CaO-MgO-Al2O3 was calculated, and it was found that the Gibbs free energy of C2M2A14 reacting with Na2CO3 at 800-1200 ℃ was positive. C2M2A14 was selected as the optimal ratio of calcium-magnesium aluminum composite oxide to resist Na2CO3.
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Published on: Jun 5, 2025 Pages: 27-29
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DOI: 10.17352/aest.000087
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