Design of refractories for resistance to high-temperature erosion-corrosion. Final report
Westinghouse has developed a theory describing erosion of refractory walls in pneumatic flow and has examined the theory in laboratory studies. The research program included modeling of wall erosion, particle motion, and collisions in pneumatic flow; and measurement of particle/wall collisions, wall erosions rates and particle attrition in pneumatic transport of solids. Investigators formulated a model that relates the kinetic energies of striking particles to the fracture energies of wall materials using three failure criteria. The model relates effects of easily measurable quantities and properties to erosion. They began development of a flow-conditions model by filming particles in pneumatic flow with a high-speed movie camera. Analysis of the film showed the mechanism causing particles to strike the tube walls. This led to a flow-conditions model relating wall collision flux of particles to the conditions of flow and system geometry. Actual collision rates were measured in pneumatic flow by application of an accelerometer sensor. A principal part of this program was measurement of the erosion rates of eight refractories with various eroding particle materials, at room temperature and at high temperatures. Investigators performed the tests in a large recirculating pneumatic tube, with high temperatures provided by a natural gas burner. Test materials were shaped into hollow cylinders and stacked to form the flow tube. Results of the erosion tests provided the unknown coefficients in the erosion model and identified the mode of particle attrition in pneumatic flow. From the erosion tests they developed recommendations and guidelines for application and design of refractories under conditions of erosion and corrosion.
- Research Organization:
- Westinghouse Research and Development Center, Pittsburgh, PA (USA)
- OSTI ID:
- 6167658
- Report Number(s):
- EPRI-AP-1955; ON: DE81904208
- Country of Publication:
- United States
- Language:
- English
Similar Records
High Temperature Erosion Modeling in Particle Based CSP Systems
Experimental Testing of Particle Erosion and Attrition in CSP Systems
Related Subjects
01 COAL, LIGNITE, AND PEAT
PNEUMATIC TRANSPORT
EROSION
REFRACTORIES
GAS FLOW
PARTICLES
PHOTOGRAPHY
SOLIDS
TUBES
FLUID FLOW
TRANSPORT
360205* - Ceramics
Cermets
& Refractories- Corrosion & Erosion
013000 - Coal
Lignite
& Peat- Transport
Handling
& Storage
010404 - Coal
Lignite
& Peat- Gasification