STEEL TECH

Effects of tundish wear lining concepts on hydrogen pick-up

Stefan Eder - Research Associate - RHIM

Due to the direct steel contact of the tundish wear lining in combination with significant residence times and the large open surface, the potential of picking up hydrogen from the wear lining is certainly high. In the general mind-set the wear lining seems to be one of the major sources of hydrogen pickup in the tundish. In Hydropick project the attention has been paid to slurry gunning mixes as they are the most distributed mixes worldwide. Water in the slurry gunning mixes should be completely removed during the drying and preheating process, but it is likely that some residual water remains in the system. The focus was the modification of the actual water demand by using different raw materials, individual binder systems, the addition of an foaming (air entraining) agent and/or the variation of the fibre content. Mixes design and preliminary tests have been conducted at laboratory/pilot facilities at RHIM, for further testing at industrial level at SIDENOR.

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