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Article

Used Tires as Fuel in Clinker Production: Economic and Environmental Implications

1
E.S.T.I. de Minas, Campus de Vegazana s.n., University of León, 24071 León, Spain
2
Department of Mining, Industrial and ICT Engineering, Polytechnic University of Catalonia (UPC), 08242 Manresa, Spain
3
Instituto Superior de Engenharia do Porto (ISEP), 4249-015 Porto, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Dino Musmarra
Sustainability 2021, 13(18), 10455; https://doi.org/10.3390/su131810455
Received: 12 August 2021 / Revised: 15 September 2021 / Accepted: 16 September 2021 / Published: 20 September 2021
This work analyzes how gases emitted during the manufacture of clinker vary in a cement plant using two types of fuel: petroleum coke and unusable tires (UTs). This study is based on a case study using real time data on more than 40 process variables. Gases are analyzed from two points of the production process: from the sintering kiln, where the main focus of emissions to the atmosphere is by chimney, and from the preheater. The variation of CO and NOx depending on the oxygen and fuel type is studied. The SO2 levels are also analyzed and a decrease was observed when using the UTs. The quality of the clinker is compared according to the fuel type. The results are analyzed, on the one hand, by the quality of the clinker, determined by the content of the majority (C3S, alite) and minority (free CaO) phases, and, on the other hand, by the kiln sintering temperature, the most influential parameter in the productive process. It is verified that the clinker quality is maintained regardless of the type of fuel used. Therefore, the use of UTs as fuel could generate important economic and environmental benefits for cement companies. View Full-Text
Keywords: clinker; used tires; pollutant gases; energy savings; environment impact clinker; used tires; pollutant gases; energy savings; environment impact
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MDPI and ACS Style

Castañón, A.M.; Sanmiquel, L.; Bascompta, M.; Vega y de la Fuente, A.; Contreras, V.; Gómez-Fernández, F. Used Tires as Fuel in Clinker Production: Economic and Environmental Implications. Sustainability 2021, 13, 10455. https://doi.org/10.3390/su131810455

AMA Style

Castañón AM, Sanmiquel L, Bascompta M, Vega y de la Fuente A, Contreras V, Gómez-Fernández F. Used Tires as Fuel in Clinker Production: Economic and Environmental Implications. Sustainability. 2021; 13(18):10455. https://doi.org/10.3390/su131810455

Chicago/Turabian Style

Castañón, Ana M., Lluís Sanmiquel, Marc Bascompta, Antonio Vega y de la Fuente, Víctor Contreras, and Fernando Gómez-Fernández. 2021. "Used Tires as Fuel in Clinker Production: Economic and Environmental Implications" Sustainability 13, no. 18: 10455. https://doi.org/10.3390/su131810455

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