Means for reclaiming galvanizing quality zinc alloy from continuous galvanizing line top dross

Patent · Tue May 26 00:00:00 EDT 1981

OSTI ID:6247598

Gibson, A F; Hogan, J C

Means and a method are described for reclaiming galvanizing quality zinc alloy from the top dross of a continuous galvanizing line. A dross furnace is provided having front, rear and side walls and a hearth sloping from the rear wall toward the front wall. The front wall is provided with one or more tap holes or a full width slot so sized as to permit the passage of molten zinc alloy therethrough while retaining the resulting sponge or slag. The dross furnace is located with its front wall overhanging the coating pot of the continuous galvanizing line. The dross furnace is maintained at a temperature of from about 460/sup 0/C to about 850/sup 0/C and is charged with the top dross from the coating P the top dross has a residence time in the dross furnace of up to about two hours. The reclaimed galvanizing quality zinc alloy, at yields from about 50% to about 70% based upon the top dross treated, flows directly back into the coating pot. The resulting slag or sponge is removed from the dross furnace which is recharged with top dross.

• Assignee: Armco Inc
• Patent Number(s): US 4269398
• OSTI ID: 6247598
• Resource Relation: Patent File Date: Filed date 5 Nov 1979
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ZINC ALLOYS
MATERIALS RECOVERY
FURNACES
LIQUID METALS
RESISTANCE HEATING
ALLOYS
ELECTRIC HEATING
ELEMENTS
FLUIDS
HEATING
LIQUIDS
MANAGEMENT
METALS
PROCESSING
RECOVERY
WASTE MANAGEMENT
WASTE PROCESSING
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management