Alloying in the Cast House
Alloying in the Cast House
Alloying in the Cast House
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Flux or No Flux Tablets?Benefits of Flux Tablets• Lower cost• Faster dissolution• Can help <strong>in</strong> remov<strong>in</strong>g oxides from <strong>the</strong> meltPotential Disadvantages of Flux Tablets• Fume generation• Potential refractory erosion and reaction with distribution bags• Potential for liquid flux rema<strong>in</strong><strong>in</strong>g <strong>in</strong> liquid alum<strong>in</strong>ium at high additions that canadversely effect end quality• Excess flux will reduce <strong>the</strong> Al content of <strong>the</strong> dross – offset by <strong>in</strong>creas<strong>in</strong>g <strong>the</strong> Almetal yield <strong>in</strong> <strong>the</strong> furnace?General Recommendation• Flux tablets are normally used for TRIM Additions.• Gives benefits of faster dissolution, lower cost and <strong>the</strong> low levels do not giveexcessive fumes or refractory erosion• When larger additions are made, requires a careful study of overall flux/fluoride<strong>in</strong>put to <strong>the</strong> melt to avoid adverse effectsMQW5 March 2012 16
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