A recycling process for dezincing steel scrap

Conference · Sat Aug 01 04:00:00 EDT 1992

OSTI ID:10163368

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, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10163368
• Report Number(s): ANL/CP--75197; CONF-9204165--2; ON: DE92016327
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305
36 MATERIALS SCIENCE
360101
COST
DISSOLUTION
EFFICIENCY
INDUSTRIAL WASTE MANAGEMENT
PREPARATION AND FABRICATION
RECYCLING
REMOVAL
SCRAP
STEELS
ZINC