Castable systems designed with powders reclaimed from dismantled steel induction furnace refractory linings
authors Silva, AP; Segadaes, AM; Lopes, RA
nationality International
author keywords Spinel-bonded Refractory; Industrial waste; Recycling; Powders; Particle size distribution; Casting
abstract Despite environmental pressures and intrinsic recycling potential, spent refractories waste is generally considered an economically unattractive waste stream. This work proposes an upgraded view of the debris recovered from dismantled spinel-bonded high-alumina linings of steel induction furnaces, demonstrating that it can be reused in the form of vibratable and self-flowing castable systems. The recovered material retains the microstructural distribution of in situ spinel formation without the corresponding disruptive expansion, mirroring the use of pre-formed spinel without the onus of a pre-firing. The mechanical performance after firing was found to be always best for the self -flowing system, which is also less affected by changes in added-water content. There is potential for large usages of cleaned waste (50-60 wt%), which helps reducing the supply risk for major refractory primary raw materials as well as landfilling costs.
issn 0272-8842
year published 2017
volume 43
issue 6
beginning page 5020
ending page 5031
digital object identifier (doi) 10.1016/j.ceramint.2017.01.012
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000394556200040
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journal impact factor 3.83
5 year journal impact factor 3.513
category normalized journal impact factor percentile 94.643
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