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Use of fluff in a coking coal blend in a pilot scale

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Abstract

Fluff is a shredder waste made up mostly of polymeric material generated in semi-integrated steel manufacturing plants, which is usually disposed of in landfills. This occurs because fluff has a complex composition due to the diverse origin of the scrap. As wastes with a residual heating value can be thermally reused, the present study evaluated applying fluff in metallurgical coking plants as an additive to mineral coal. The composition and particle size of the coarse and fine fractions of fluff were determined, and both currents are rich in materials with high calorific value. The fine fraction was selected due to the particle size suitable for use in coke ovens, and the calorific potential was determined (18.1 MJ/kg). Metallurgical analysis of the coke in pilot scale tests (ash and sulfur contents, as well as reactivity and mechanical strength of coke) revealed that up to 1% fluff might not compromise the blast furnace performance. Given the amount of steel produced in blast furnaces worldwide, such a strategy may considerably reduce the volume of fluff destined for landfills.

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Acknowledgements

The authors wish to acknowledge Gerdau and CNPq (PQ1C Grant Number 304018/2020-1).

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Authors and Affiliations

  1. Programa de Pós-Graduação em Engenharia Metalúrgica e de Materiais, UFRJ, Rio de Janeiro, Brazil

    Gabriela Montine Resende Pratti, Igor dos Reis Detoni, Georgio Patrício de Souza Resende & Marcelo Borges Mansur

  2. Departamento de Engenharia Metalúrgica e de Materiais, UFMG, Belo Horizonte, Brazil

    Leandro Rocha Lemos

  3. Gerdau, Rod. MG-443 km 7, Ouro Branco, Brazil

    Guilherme Liziero Ruggio da Silva

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  1. Gabriela Montine Resende Pratti
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  2. Igor dos Reis Detoni
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Correspondence to Marcelo Borges Mansur.

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Pratti, G.M.R., Detoni, I.d., de Souza Resende, G.P. et al. Use of fluff in a coking coal blend in a pilot scale. J Mater Cycles Waste Manag 24, 702–711 (2022). https://doi.org/10.1007/s10163-022-01352-6

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