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Tata Steel UK Port Talbot has
embarked on a programme to improve the
RH and RD degasser snorkel life through
material selection, design optimisation and
process control. The critical wear around the
tuyeres (argon flow) has been investigated
using thermal mechanical FEM modelling to
assess the effect of snorkel construction,
preheat temperature and refractory material
selection on wear rate and wear mechanisms.
The increased rigidity and thermal
expansion of the fired magnesia chrome
bricks can lead to thermal cracking. The
formation of micro-cracks in the early stage
of the campaign would weaken the lining
structure and accelerate the degree of hot
erosion.

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