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3. Metal-silk balances
As the slag's composition enables it to control exchanges with the metal, it is necessary to be able to act on the available parameters in such a way as to shift a valuable element towards the metal or, conversely, a deleterious element towards the slag.
Similarly, if the composition of a molten metal is adjusted using additives, we need to be sure that the added elements will not find their way, at least in part, into the slag.
3.1 Partition coefficients
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Definition
The partition coefficient of an element M, between metal and slag, is generally defined by :
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Metal-silk balances
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