Application of basic oxygen furnace (BOFS) in agriculture: A study on the economic viability and effects on the soil
Autor: | Giorgio Ragaglini, Barbara Fornai, Chiara Pistocchi, Valentina Colla, Teresa Annunziata Branca |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Basic oxygen steelmaking
Topsoil Environmental Engineering business.industry 0208 environmental biotechnology Environmental engineering Amendment Slag 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law engineering.material 01 natural sciences Pollution Steelmaking 020801 environmental engineering Loam visual_art Soil water visual_art.visual_art_medium engineering Environmental science Fertilizer business 0105 earth and related environmental sciences |
Popis: | Slags are the main by-products from steelmaking cycle, which are currently recycled inside the steel industry as well as in other sectors with significant environmental and economic benefits. As in Italy slags application is not yet allowed in agriculture, the paper aims at evaluating the technical and economic feasibility of a slag treatment plant, to obtain a product to be sold in the fertilizer market as soil amendment. A preliminary assessment of the fate of some trace metals (Cr, V, Sb and Se) contained into the Basic Oxygen Furnace (BOF)slag, was performed, to analyze the effects on cultivated soils, particularly in neutral/sub-alkaline ones. A soil infiltration column test was performed, assessing the effect of three slag doses (0, 6 and 20 mg kg-1 of soil) on two sub-alkaline soils (a clay loam and a sandy loam). A simplified Life Cycle Cost analysis and an estimation of some financial indicators were developed considering the convenience of the investment when the slag is stored internally or externally from the steelworks. The results of the column tests showed an increase of P availability and Ca content, while trace metals (e.g. Chromium and Vanadium) were not leached and mostly remained in the topsoil. This can represent a limit for using slags in the long term. The economic analysis revealed that the convenience on such investment strongly depends on the cost of disposal and on the prices of the slag as fertilizer, and, according to the sensitivity analysis, the profitability is sensitive to the used discount rate. |
Databáze: | OpenAIRE |
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