Vitrification of municipal waste combustor residues: physical and chemical properties of electric arc furnace feed and products.
O'Connor-WK; Oden-LL; Turner-PC
Proceedings of process mineralogy XII: applications to environment, precious metals, mineral beneficiation, pyrometallurgy, coal and refractories. William P; Rule AR, eds. Warrendale, PA: TMS, 1994 Jun; :17-37
The U.S. Bureau of Mines (USBM), in cooperation with the American Society of Mechanical Engineers (ASME), conducted over 200 hours of melting tests to vitrify residues from five municipal waste combustion facilities. Combined residues (grate residue and flyash) from three municipal waste combustors, a waste water treatment sludge combustor, and flyash from a refuse-derived-fuel (RDF) boiler, were sequentially melted in a 1-metric-ton (mt) water-cooled-wall electric arc furnace. Each of the residues underwent magnetic separation, screen size analysis, and bulk chemical analysis prior to melting. The furnace products were examined by optical and electron microscopy and by X-ray diffraction. Bulk chemical analyses were acquired for the metal, fume, and vitrified furnace products. The material balance for the furnace operation indicates that from 69 to 86 pct of the feed reported to the vitrified furnace product, which had leaching potentials well below the BP A limit for each metal, as determined by the EPA TCLP. The electric arc melting furnace currently is being utilized in a cooperative research project between the USBM and the Idaho National Engineering Laboratory (INEL) for melting tests on simulated low-level radioactive wastes.
Author Keywords: combustor residue ash; electric arc furnace; municipal waste; vitrification
Proceedings of process mineralogy XII: applications to environment, precious metals, mineral beneficiation, pyrometallurgy, coal and refractories