Alloying in the Cast House

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$Large Precast refractory shapes for furnace linings$

Flux or No Flux Tablets?Benefits of Flux Tablets• Lower cost• Faster dissolution• Can help in removing oxides from the meltPotential Disadvantages of Flux Tablets• Fume generation• Potential refractory erosion and reaction with distribution bags• Potential for liquid flux remaining in liquid aluminium at high additions that canadversely effect end quality• Excess flux will reduce the Al content of the dross – offset by increasing the Almetal yield in the furnace?General Recommendation• Flux tablets are normally used for TRIM Additions.• Gives benefits of faster dissolution, lower cost and the low levels do not giveexcessive fumes or refractory erosion• When larger additions are made, requires a careful study of overall flux/fluorideinput to the melt to avoid adverse effectsMQW5 March 2012 16
• Packaging– Foil, plastic, paper bags– In ~20kg cardboard cartons / paper bags or 1,000kg big bags• Tablet sizePackaging and Size of Tablets– Mini or large tablets 100gram, 200grams, 1000kgs• In general packaging types and tablet size does NOT affectdissolution rates or yield• Choice of packaging is related to individual cast house choice• There is an interest to evaluate bulk additions to minimise manualhandling in the cast houseMQW5 March 2012 17
Page 1 and 2: DIOCESANE PEDAGOGISCHE BEGELEIDINGS
Page 3 and 4: Alloying in the Cast HouseMQW5 Marc
Page 5 and 6: Alternative Methods of AlloyingHigh
Page 7 and 8: Metal CleanlinessReference work on
Page 9 and 10: Mechanisms of Dissolution (simplifi
Page 11 and 12: Tablet DissolutionSwelled CompactsM
Page 13 and 14: Types of Alloying TabletsCompositio
Page 15: Alternative Types of Binder• Alum
Page 19 and 20: Conclusions• There is a very wide

Alloying in the Cast House

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