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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 19a
SUMMARY:Sub meniscus velocimetry: An efficient way to study flow in the mould
DESCRIPTION:The quality of continuously cast steel is greatly influenced by the flow conditions in the mould, particularly at the meniscus, where the liquid steel is in direct contact with the casting flux. Stable conditions within a defined velocity range need to be achieved to avoid slag entrainment, one of the causes for product defects such as slivers on cold rolled sheets or defects on heavy plates, as well as an increasing breakout risk, due to uneven mould lubrication. Determination of the flow inside the mould therefore is an important aspect in order to assess the status of the system and derive possible measures for improvement, such as by the design of submerged entry nozzles.
This paper presents the application of a method to continuously measure the sub meniscus velocity in the mould of slab casters using immersed paddles. Information about the velocity distribution as well as the general flow pattern trend and stability can be gathered. This goes beyond standard nail dipping tests, which typically only provide a snapshot but lack information about transient phenomena. In combination with modern simulation technology the described system can support general design optimization of refractory solutions for the continuous casting process and in particular provide criteria for tailor made customer solutions. Several examples are shown in this paper.

CLASS:PUBLIC
DTSTART:20230614T094000
DTEND:20230614T100000
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