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Journal article
Evaluating the deposit layer and ring formation during coal-ash-based lightweight aggregates sintering
Powder technology, v 469(Part 1), 121761
01 Feb 2026
Featured in Collection : Research Supported by Drexel Libraries' OA Programs
Abstract
Sintering with a rotary furnace is efficient for ceramic manufacturing but faces challenges like deposit buildup and ring formation, which can disrupt production. Deposits adhere to the furnace's inner pipe surface, hindering material flow while ring formation creates ring-shaped obstructions. This study investigated these issues during waste coal-ash-based lightweight aggregate (WCA-LWA) sintering, examining factors like particle size, material proportioning, and sintering parameters. Findings indicate that particles ≤300 μm contribute to ring formation. Applying a 20 wt% coating reduces ring formation. SEM-EDS revealed Na traces in the deposit layer indicating coating and fine pellets (≤ 50 μm) contribute to deposits. Rietveld XRD assessed crystalline and amorphous phases of raw WCA, sintered WCA-LWA, and deposit materials. Adjusting input feed parameters helps reduce ring formation, with a feeding rate of 15 g/314 s enhancing WCA-LWA production by 15.5 % before ring formation appears. While adjusting sintering parameters may not eliminate ring formation, it reduces its occurrence, minimizing the need for physical intervention, costly cleaning, or unplanned furnace shutdowns.
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Details
- Title
- Evaluating the deposit layer and ring formation during coal-ash-based lightweight aggregates sintering
- Creators
- Yousif Alqenai (Corresponding Author) - Drexel University, Civil, Architectural, and Environmental EngineeringMohammadamin Zooyousefin - Drexel University, Civil, Architectural, and Environmental EngineeringYaghoob “Amir” Farnam - Drexel University, Civil, Architectural, and Environmental Engineering
- Publication Details
- Powder technology, v 469(Part 1), 121761
- Publisher
- Elsevier
- Number of pages
- 12
- Grants
- PFI-TT: Development of Scalable Lightweight Aggregate Manufacturing from Waste Coal Combustion Ash (2019-2024), PFI-TT, 1918838, National Science Foundation (United States, Arlington) - NSF
- Grant note
- National Science Foundation - 1918838 Pennsylvania Department of Transportation - 4400024510
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:001603069800004
- Scopus ID
- 2-s2.0-105018912330
- Other Identifier
- 991022122863404721
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- Collaboration types
- International collaboration
- Web of Science research areas
- Engineering, Chemical