Abstract
The thermal stress analysis within lump coke was studied in order to investigate macro-crack formation and deformation behavior which strongly influence heat and mass transfer in a coke oven chamber. The dilatation of plastic layer, heating rate dependence of thermophysical and mechanical properties of coal/coke, creep in the plastic and semi-coke layers, macro-crack propagation and radiative heat transfer within the macro-crack were considered in an analytical model. The macro-crack propagation was determined from the estimated crack tip stress intensity factor, Khat the macro-crack tip compared with the plane strain fracture toughness, KIC, through the unsteady-state calculation. Calculated results on crack formation and deformation behavior of lump coke were in good agreement with experimental observations in a laboratory-scale oven chamber. The analytical model could predict micro-crack formation within the lump coke normal to the heated wall and the coke surface close to the heated wall.
Original language | English |
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Pages (from-to) | 341-348 |
Number of pages | 8 |
Journal | kagaku kogaku ronbunshu |
Volume | 21 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1995 |
Keywords
- Carbonization
- Crack
- Creep Analysis
- Dilatation
- FEM
- Stress Intensity Factor
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)