Evaluation of ceramic refractories for corrosion behavior by molten slag-seed mixture of a coal-fired open-cycle MHD system
In an investigation of the possible use of a refractory material on the water walls of a radiant boiler in a coal-fired open-cycle MHD plant, the corrosion of a wide variety of commercial refractories was studied under reducing conditions at approx. 1500/sup 0/C in a coal-ash slag/potassium seed mixture. For several refractories, the results appear promising. Compared with earlier results obtained with slag only at approx. 1500/sup 0/C, the presence of approx. 10 mass percent K/sub 2/O seed in the Montana Rosebud slag did not result in increased corrosion, and may actually have improved the corrosion resistance of many of the refractories that were tested. Of the fused-cast materials, the chrome-spinel refractory exhibited superior corrosion resistance. The magnesia-chrome refractories have shown more resistance to corrosion than the other sintered materials that were tested. A phosphate-bonded chrome-ore ramming mix performed better than the other ramming mixes, but not as well as any of the sintered or fused-cast bricks.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6115035
- Report Number(s):
- ANL/MHD-79-9
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coal-ash slag attack and corrosion of refractories
Coal slag-refractory compatibility studies: progress to date
Related Subjects
36 MATERIALS SCIENCE
CERAMICS
CORROSION RESISTANCE
COAL-FIRED MHD GENERATORS
MATERIALS TESTING
REFRACTORIES
ASHES
BOILERS
CHEMICAL COMPOSITION
CORROSION
CRACKS
EXPERIMENTAL DATA
OPEN-CYCLE MHD GENERATORS
POTASSIUM
SINTERED MATERIALS
SLAGS
TABLES
ALKALI METALS
CHEMICAL REACTIONS
DATA
DATA FORMS
DIRECT ENERGY CONVERTERS
ELEMENTS
INFORMATION
METALS
MHD GENERATORS
NUMERICAL DATA
RESIDUES
TESTING
300103* - MHD Generators- Materials
Components
& Auxiliaries
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion