98/02363 Investigation and application of Cr2O3-Al2O3-ZrO2 refractories for slagging coal gasifiers : Guo, Z. and Hui, Z. China's Refract., 1997, 6, (4), 18–22
- Book ID
- 104285674
- Publisher
- Elsevier Science
- Year
- 1998
- Weight
- 427 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
The corrosion rates of ceramics are affected by coal gasifier operating conditions and gas and ash compositions in three ways: (1) through direct corrosion of the materials, (2) by affecting the concentration and chemical form of the primary corrodents and (3) by affecting the mass transport rate of the primary corrodents.
Accurate corrosion tests on a system material require the researcher to include all relevant corrodents and simulate conditions in the gasifier as closely as possible. Suggestions for conditions in such corrosion tests are made in this paper. Two main types of corrosion conditions are discussed: those existing in hot-gas cleanup systems where vapour and dry ash may contribute to corrosion and those experienced by high-temperature heat exchangers and refractories where the main corrodent will be coal ash slag.
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