What are fluxes? Which flux is used to remove impurity of $F e O$ ?

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Solution

A flux is a chemical substance added to the concentrated ore during smelting in order to remove the gangue to form easily fusible slag.
$S i O_{2}$ flux is used to remove impurity of FeO.
$S i O_{2} Acidic flux + F e O Basic gangue \to F e S i O_{3} slag$

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What are fluxes? Which flux is used to remove impurity of FeO?

A flux is a chemical substance added to the concentrated ore during smelting in order to remove the gangue to form easily fusible slag.SiO2 flux is used to remove impurity of FeO.SiO2 Acidic flux +FeO Basic gangue →FeSiO3 slag

What are fluxes? Which flux is used to remove impurity of $F e O$ ?

A flux is a chemical substance added to the concentrated ore during smelting in order to remove the gangue to form easily fusible slag.
$S i O_{2}$ flux is used to remove impurity of FeO.
$S i O_{2} Acidic flux + F e O Basic gangue \to F e S i O_{3} slag$