Copper removal from solid ferrous scrap
As discussed in detail in the Appendix, copper is detrimental to the properties of steel. Copper is present in most forms of recycled scrap, such as bundles and shredded scrap. Typical levels of copper in these forms of scrap are 0.2 to 0.4%, whereas critical grades of steel require less than 0.1 and often 0.06% Cu. Therefore, these forms of scrap cannot be used alone to produce quality steels. Steelmakers must dilute the copper from lower quality scrap with expensive high quality scrap or direct reduced iron pellets. Currently there is no effective method for removing copper from scrap. The only proven method is improved physical separation which is labor intensive, expensive, and only marginally reduces the copper content. Chemical treatments, such as sulfide treatment of liquid metal and vacuum, are not effective as discussed in the Appendix in detail. Carnegie Mellon University developed a concept for removing copper from solid ferrous scrap at 900--1000{degrees}C using a FeS-Na{sub 2}S reagent. Small laboratory tests showed 90% of the Cu from simulated solid scrap could be removed. The major results of this study are summarized in this report. Details are given in the reports in the Appendix.
- Research Organization:
- Carnegie Mellon Univ., Pittsburgh, PA (USA). Center for Iron and Steel Making Research
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG02-88CE40875
- OSTI ID:
- 5889874
- Report Number(s):
- DOE/CE/40875-2; ON: DE91010831
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COPPER
REMOVAL
SCRAP METALS
RECYCLING
FEASIBILITY STUDIES
IRON ALLOYS
IRON SULFIDES
PROGRESS REPORT
SMELTING
SODIUM SULFIDES
ALKALI METAL COMPOUNDS
ALLOYS
CHALCOGENIDES
DOCUMENT TYPES
ELEMENTS
IRON COMPOUNDS
METALS
SCRAP
SODIUM COMPOUNDS
SOLID WASTES
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTES
360101* - Metals & Alloys- Preparation & Fabrication
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
320604 - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Municipal Waste Management- (1980-)