The application of mould powder for certain steel grades is mainly based on experience. In an ECSC project, an inventory was made addressing the physical properties that are the basis of this experience. It is concluded that, for each steel grade, common physical properties (e.g. viscosity, melting temperature) can be identified. There is, however, a large variation in the values of physical properties used. It is therefore not possible to find any relationship between slag properties and casting conditions, given the steel grade to be cast. Wider ranges in physical properties are possible and realistic to enable casting of a steel type at a particular speed.
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