Mould Powders

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Spray-Dried Mould Powders

 

Scorialit SPH is a hollow-sphere product, with the same functions as fine powders:		Lubrication between the solidifying strand and mould wall Control of heat transfer between the strand and mould Thermal insulation of the liquid steel surface Prevention of re-oxidation Inclusion absorption
The above functions are controlled by the following properties:		Basicity Viscosity Melting speed Melting behaviour Crystallization
The choice of a mould powder depends on:		Mould size Oscillation conditions Casting speed Steel grade
In addition, spray-dried mould powders offer the following advantages:		No dust emission, hence environmentally friendly Better homogeneity thus greater uniformity of mould powder properties Low bulk density with better heat insulation Excellent flowability with a uniform slag thickness Longer shelf life Automatic feeding, giving reduced costs
Spray-dried powders are optimised according to the parameters and individual requirements of the continuous caster. Metallurgica supplies spray-dried powders for the following formats:		Slabs Billets Blooms Rounds Beam blanks