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Steels from a Variety of Ferrous Scrap Including Materials of Low Quality.
Spironello-VR; Shah-ID; Nafziger-RH
MISSING :15 pages
One of the primary objectives of the Bureau of Mines solid waste utilization program is the recycling of the magnetic fraction of municipal solid waste called raw refuse scrap. In this investigation, several types of scrap of differing quality, including refuse and turnings, were melted in a 1-ton electric arc furnace in various combinations to produce steel in noncritical (construction) grades. Information on furnace operation and on the behavior of tramp and alloying elements was obtained. The research showed that it is possible to produce acceptable steel from a variety of steel scrap. Although some scrap is routinely used in steelmaking, it was found that up to 50 to 55 pct of the scrap charge can be refuse, provided it is combined with higher quality scrap. The chemistry of the steels was generally acceptable, and all of them were rolled without difficulty. The specification (ASTM 615) for the steels produced was grade 40 or grade 60, containing 0.30 Or 0.40 pct c, with minimum yield strengths of 40,000 or 60,000 psi, respectively. Most of the steels met the specification requirements. Information on typical microstructures of some of the steels is included. The composition of some furnace dusts showed high levels of sn, pb, and zn.
IH; Report of Investigations
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division