Thermal-shock studies on refractories for slagging coal gasifiers
Technical Report
·
OSTI ID:6878743
Water quench tests and ribbon tests were used to investigate the thermal-shock resistance of several commercial refractories that are candidates for use in slagging coal-gasifier linings. Both tests allowed ranking of the refractories with respect to thermal-shock resistance, and indicated that refractories with high alumina content generally have better resistance than those with high chromia content. The nature (discontinuous vs gradual) of the observed strength degradation for a single-cycle water quench was found to be in general agreement with that predicted from the calculated crack length by measuring the critical stress intensity factor (K/sub Ic/) and strength (sigma/sub f/). The thermal-shock-resistance parameter R/sub st/ was found to provide a good measure of the thermal-shock-damage resistance in the ribbon test. However, a microstructural evaluation is necessary to select a particular parameter for predicting the degradation of refractories by thermal shock. The retained elastic modulus after thermal shock increased rapidly with increasing R/sub st/ up to a critical value of R/sub st/; above this critical value, the increase in the modulus with further increases in R/sub st/was relatively small. These results are discussed in terms of their implications for the selection and development of new refractories with improved thermal-shock resistance.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6878743
- Report Number(s):
- ANL/FE-84-3; ON: DE84016352
- Country of Publication:
- United States
- Language:
- English
Similar Records
Thermal-shock resistance of slagging coal gasifier refractories as evaluated by the ribbon test
Slag-Refractory Interaction in Slagging Coal Gasifiers
Thermal-shock damage of refractories for application in slagging coal gasifiers
Journal Article
·
Tue Oct 01 00:00:00 EDT 1985
· Am. Ceram. Soc. Bull.; (United States)
·
OSTI ID:6276627
Slag-Refractory Interaction in Slagging Coal Gasifiers
Conference
·
Sun Mar 02 23:00:00 EST 2008
·
OSTI ID:962522
Thermal-shock damage of refractories for application in slagging coal gasifiers
Journal Article
·
Mon Feb 28 23:00:00 EST 1983
· J. Mater. Energy Syst.; (United States)
·
OSTI ID:5733237