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Transient Thermal‐Stress Analysis of Steel Slag Pots: Impact of the Solidifying‐Slag Layer on Heat Transfer and Wear
Author(s) -
Neacşu Ioana Adina,
Scheichl Bernhard,
Rojacz Harald,
Vorlaufer Georg,
Varga Markus,
Schmid Herbert,
Heiss Josef
Publication year - 2016
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201500203
Subject(s) - materials science , cladding (metalworking) , metallurgy , heat transfer , slag (welding) , thermal , finite element method , temperature gradient , composite material , stress (linguistics) , mechanics , thermodynamics , linguistics , philosophy , physics , quantum mechanics
The containers used for steel slag transportation to the recycling depot undergo high‐temperature gradients and often deform plastically. Also, parts of the thereby solidified slag adhere to the pot walls, causing demolding problems and wear. A thorough finite‐element analysis of the heat transfer, initiated by filling the pots and essentially driven by radiation, and the thermal stresses is performed. Due to periodic fill‐in and discharge, these are assumed to admit a quasi‐stationary state referring to the pot temperature before their emptying. The so obtained results aid optimizing the pot shape and the transport process in terms of minimizing maintenance and anti‐adhesive cladding. A layer of solidified slag is found to exist throughout the transport process. Although the phase change occurs almost instantaneously at a liquid–solid interface, the “mushy zone” is considered in the accompanying analytical study of the associated Stefan‐type problem. Good correlations of the predicted temperatures to the measured ones and the resultant surface damaging are obtained.