Monitoring of Refractory Wall recession using high temperature impact echo instrumentation
Abstract
Regression of refractory linings of furnaces occurs due to a variety of mechanisms. The specific mechanism selected for investigation during this program is the regression of refractories which are in direct contact with a liquid corrodant. Examples include the melting of glass, the production of pig iron and steel, and the melting of aluminum. The rates of regression to a wall thickness which requires reline or extensive reconstruction vary widely, from less than a year to over ten years depending on the specific service environment. This program investigated the feasibility of measuring refractory wall thickness with an impact-echo method while at operating temperature (wall temperatures exceeding 500 C). The impact-echo method uses the impact of a small sphere with the surface of the test object to send a stress wave into the object. In a plate-like structure, the stress wave reflects back to the front surface, reverberating in the structure and causing a periodic surface displacement whose frequency is inversely proportional to the thickness of the test object. Impact-echo testing was chosen because it requires access to only one side of the test object and could be performed during the operation of a refractory structure. Commercially-available impact-echo instrumentation is availablemore »
- Authors:
- Publication Date:
- Research Org.:
- Golden Field Office, Golden, CO (US)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EE) (US)
- OSTI Identifier:
- 828221
- Report Number(s):
- DE-FG36-02GO12051
TRN: US200428%%993
- DOE Contract Number:
- FG36-02GO12051
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: 30 Apr 2004
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; FURNACES; LINERS; MONITORING; REFRACTORIES; NONDESTRUCTIVE TESTING; THICKNESS; CORROSION
Citation Formats
University of Dayton. Monitoring of Refractory Wall recession using high temperature impact echo instrumentation. United States: N. p., 2004.
Web. doi:10.2172/828221.
University of Dayton. Monitoring of Refractory Wall recession using high temperature impact echo instrumentation. United States. https://doi.org/10.2172/828221
University of Dayton. 2004.
"Monitoring of Refractory Wall recession using high temperature impact echo instrumentation". United States. https://doi.org/10.2172/828221. https://www.osti.gov/servlets/purl/828221.
@article{osti_828221,
title = {Monitoring of Refractory Wall recession using high temperature impact echo instrumentation},
author = {University of Dayton},
abstractNote = {Regression of refractory linings of furnaces occurs due to a variety of mechanisms. The specific mechanism selected for investigation during this program is the regression of refractories which are in direct contact with a liquid corrodant. Examples include the melting of glass, the production of pig iron and steel, and the melting of aluminum. The rates of regression to a wall thickness which requires reline or extensive reconstruction vary widely, from less than a year to over ten years depending on the specific service environment. This program investigated the feasibility of measuring refractory wall thickness with an impact-echo method while at operating temperature (wall temperatures exceeding 500 C). The impact-echo method uses the impact of a small sphere with the surface of the test object to send a stress wave into the object. In a plate-like structure, the stress wave reflects back to the front surface, reverberating in the structure and causing a periodic surface displacement whose frequency is inversely proportional to the thickness of the test object. Impact-echo testing was chosen because it requires access to only one side of the test object and could be performed during the operation of a refractory structure. Commercially-available impact-echo instrumentation is available for room temperature use for a variety of tests on concrete. The enabling technology for this work was to use a high-temperature piezoelectric material, aluminum nitride, as the receiving sensor for the stress waves, allowing its use on refractories during furnace operation.},
doi = {10.2172/828221},
url = {https://www.osti.gov/biblio/828221},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Apr 30 00:00:00 EDT 2004},
month = {Fri Apr 30 00:00:00 EDT 2004}
}