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Quality of ferrous scrap from MSW incinerators: a case study of Spain

AuthorsLópez-Delgado, Aurora ; Peña, Carmen; López, Víctor; López Gómez, Félix Antonio
KeywordsFerrous scrap
Municipal solid waste
Scrap quality
Issue Date2003
CitationResources, Conservation and Recycling 40 (1) : 39-51 (2003)
AbstractThe recovery of packaging steel from municipal solid waste (MSW) plays an important role in scrap recycling. Post-consumer packaging steel quality depends strongly on the procedure and the technology employed for its collection and recovery. Household refuse management systems include classification, compost and incineration plants. In Spain, MSW incineration is carried out by nine incinerators that generate a total of around 40 000 t of ferrous scrap every year. Two types of furnace are used for the incineration process, namely mobile grate furnaces (MGF) and fluidised bed furnaces (FBF). Slag from the process is comprised by the incombustible materials ofMSW(vitreous materials, ceramic materials, ferrous and nonferrous metals). Slag accounts for 85–95% of the total solid waste mass. About 95% of the metallic fraction corresponds to ferrous scrap. The objective of this paper was to determine the current quality of scrap from incinerators and to study the causes of alteration of steel, i.e. of the corrosion of its surface, attempting to relate these parameters with the technology used in the combustion of MSW and the cooling treatment applied to the slag. A process for enhancing the quality of ferrous scrap from MSW is described, which includes fragmentation and magnetic separation stages.
Publisher version (URL)http://dx.doi.org/10.1016/S0921-3449(03)00024-7
Appears in Collections:(CENIM) Artículos
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