A recycling process for dezincing steel scrap

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:5015503

Dudek, F J; Daniels, E J ^[1]; Morgan, W A; Kellner, A W; Harrison, J ^[2]

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1. Argonne National Lab., IL (United States)
2. Metal Recovery Industries, Inc., Hamilton, ON (Canada)

In response to the several-fold increase in consumption of galvanized steel in the last decade and the problems associated with refurnacing larger quantities of galvanized steel scrap, a process is being developed to separate and recover the steel and zinc from galvanized ferrous scrap. The zinc is dissolved from the scrap in hot caustic using anodic assistance and is electrowon as dendritic powder. The process is effective for zinc, lead, aluminum, and cadmium removal on loose and baled scrap and on all types of galvanized steel. The process has been pilot tested for batch treatment of 1,000 tons of mostly baled scrap. A pilot plant to continuously treat loose scrap is under construction. Use of degalvanized steel scrap decreases raw materials and environmental compliance costs to steel- and iron-makers, may enable integrated steel producers to recycle furnace dusts to the sinter plant, and may enable EAF production of flat products without use of DRI or pig iron. Recycling the components of galvanized steel scrap saves primary energy, decreases zinc imports, and adds value to the scrap.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5015503
• Report Number(s): ANL/CP-75197; CONF-9204165-2; ON: DE92016327
• Resource Relation: Conference: 1992 steelmaking conference, Toronto (Canada), 5-8 Apr 1992
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
STEELS
RECYCLING
ZINC
REMOVAL
COST
DISSOLUTION
EFFICIENCY
SCRAP
ALLOYS
ELEMENTS
IRON ALLOYS
IRON BASE ALLOYS
METALS
SOLID WASTES
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
360101 - Metals & Alloys- Preparation & Fabrication