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Corrosion of ceramic refractories exposed to synthetic coal slags by means of the rotating-cyclinder technique: an interim report

Technical Report ·
OSTI ID:6255289
; ; ; ; ; ; ;
A rotating cylinder refractory/slag corrosion facility was designed and built to expose cylindrical samples of refractory to molten slag under controlled conditions of slag composition, oxygen partial pressure, temperature, and speed of rotation. The effects of slag composition, temperature, and rotational speed on the corrosion of chromia-containing refractories were studied. 25-mm (1-in.)-dia x 25-mm (1-in.)-high refractory cylinders are rotated at a controlled rate (50 to 200 rpm) in slags of known composition, under controlled temperature (1480 to 1600/sup 0/C) and oxygen partial pressure (approx. 10/sup -8/ to approx. 10/sup -10/ atm) conditions. Refractories containing 60 to 80% Cr/sub 2/O/sub 3/ showed negligible corrosion at 1500/sup 0/C. At 1600/sup 0/C, significant differences between refractories of similar composition were apparent, particularly at high rotational speeds. Subtle mineralogical differences among the various high-chromia refractories are the apparent cause of the differences in corosion rates. Low-chromia (10% Cr/sub 2/O/sub 3/) refractories showed greatly accelerated corrosion rates in comparison with the high-chromia refractories.
Research Organization:
Argonne National Lab., IL (USA)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
6255289
Report Number(s):
ANL/FE-83-31; ON: DE85004824
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
36 MATERIALS SCIENCE
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COAL GASIFICATION PLANTS
CORROSION
CYLINDERS
INDUSTRIAL PLANTS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS TESTING
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
REFRACTORIES
SLAGS
SPINELS
TESTING
TRANSITION ELEMENT COMPOUNDS