Abstract
To reduce fluorine pollution, partial fluoride could be replaced by Na 2C0 3 in mould flux for continuous casting. The properties including melting temperature, viscosity fluidity, surface tension and A1 20 3 inclusion adsorption of low fluoride content mould flux with addition of Na 2C0 3 for thin slab casting were studied. The results showed that with the increase in Na 2C0 3 content, melting temperature, viscosity and viscous activation energy of mould flux decreased obviously, fluidity increased, surface tension changed little, and A1 20 3 inclusion adsorption of mould flux increased. The Na 2C0 3 could play effective role when its content was less than 9%. The results would play a guiding role in designing of low fluoride content mould flux for thin slab continuous casting.
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