Resumo

DAVIDSEN, J.E.  e  HONSTAD, M.. Tap-hole maintenance and management on furnace 10 at Eramet Norway Porsgrunn. J. S. Afr. Inst. Min. Metall. [online]. 2019, vol.119, n.6, pp.545-550. ISSN 2411-9717.  http://dx.doi.org/10.17159/2411-9717/674//2019.

A well-maintained tap-hole channel is important in order to achieve good and stable furnace operation over time. A worn or short tap-hole channel can lead to more violent flow, significantly increasing the fume emissions during tapping and leading to more metal being mixed with and lost to the slag. Over time, a worn tapping channel might cause side channels and damage to the lining around the tap-hole area. This can result in a burn-through which is a considerable safety risk and will cause significant production losses. At Eramet Norway Porsgrunn, tap-hole maintenance has been done regularly with electrode paste for over three decades with good results. This article summarizes some of the experiences obtained from this practice on a 33 MW SiMn furnace, as well as a change to a coal tar pitch-free binder.

Palavras-chave : tap-hole maintenance; lining; tap-hole wear; coal tar pitch-free.

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