Chemical wear analysis of a tap-hole on a SiMn production furnace
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Date
Authors
Steenkamp, J.D. (Joalet Dalene)
Pistorius, Petrus Christiaan
Tangstad, M.
Journal Title
Journal ISSN
Volume Title
Publisher
Southern African Institute of Mining and Metallurgy
Abstract
In April 2013 a 48 MVA submerged arc furnace producing silicomanganese
was excavated in South Africa. Since the high shell temperatures recorded
in the tap-hole area resulted in the furnace being switched out for relining,
the tap-hole area was excavated systematically. A refractory wear profile
of the tap-hole area with affected hearth and sidewall refractory was
obtained in elevation. The carbon ramming paste in front of, above, and
below the tap-hole was worn, as was the SiC with which the tap-hole was
built. A clay mushroom formed but was detached from the refractories.
Thermodynamic and mass-transfer calculations were conducted to
quantify the potential for wear by chemical reaction between refractory
and slag and refractory and metal in the tap-hole area. It was found that
chemical reaction between refractory and slag or metal could offer only a
partial explanation for the wear observed; erosion is expected to contribute
significantly to wear.
Description
Keywords
Excavation, Dig-out, Post-mortem, Submerged arc furnace, Silicomanganese, Refractory, Tap-hole, Thermodynamics, FACTSage, Mass transfer
Sustainable Development Goals
Citation
Steenkamp, JD, Pistorius, PC & Tangstad, M 2015, 'Chemical wear analysis of a tap-hole on a SiMn production furnace', Journal of the Southern African Institute of Mining and Metallurgy, vol. 115, pp. 199-208.