Process to eliminate hazardous components from the electric arc furnace flue dust and recovering of metals

Patent · Tue Aug 09 04:00:00 EDT 1988

OSTI ID:6527233

Lazcano-Navarro, A

This patent describes a method to recover metals from flue dust generated in an electric arc furnace, the method comprising: charging pelletized or powder flue dust into an electric induction furnace between induction susceptors; sealing of the furnace top to prevent entry of air; injecting natural gas through the bottom of the electric induction furnace as a solitary reducing agent; heating the charge by electromagnetic induction of the susceptors to provide reduction energy; recovering of heavy metals as a zinclead-cadmium alloy in a condenser at the top of the furnace; burning and scrubbing exiting gases in the condenser; and melting the remaining iron to produce steel and slag.

• Assignee: NOV; EDB-89-026301; NOV-89-034360
• Patent Number(s): US 4762554
• OSTI ID: 6527233
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
AIR POLLUTION CONTROL
ALLOYS
ARC FURNACES
ASHES
CADMIUM ALLOYS
CONTROL
DEMETALLIZATION
ELECTRIC FURNACES
ELEMENTS
EMISSION
FLUIDS
FLY ASH
FUEL GAS
FUELS
FURNACES
GAS FUELS
GASES
HAZARDOUS MATERIALS
LEAD ALLOYS
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
MELTING
METALS
PARTICLES
PARTICULATES
PHASE TRANSFORMATIONS
POLLUTION CONTROL
PROCESSING
RECOVERY
RESIDUES
SCRUBBING
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
ZINC ALLOYS