Study of recycling of carbon tailings from Portland cement pro-duction

  • Authors

    • Arlindo Mendes Bernal
    • Mariana Messias Soares
    • Leandro Gustavo Mendes de Jesus Federal Institute of Mato Grosso do Sul
    2023-11-30
    https://doi.org/10.14419/2x8ptx81

  • In the clinker Portland production process, rotary kilns burn fuels to reach temperatures as high as 1450 °C. In the Mato Grosso do Sul State, the most common fuel used in such kilns is grounded charcoal. After the grinding steps, charcoal is sieved, and the re-tained material is discarded as tailings. Despite such materials have some carbon matter in its composition, it is a high ash content material. This work is based on the hypothesis that, during the grinding of the material, organic compounds would break in finer particles since they show lower abrasive strength. Thus, ash materials would remain in the coarser particles. The goal of the work is to evaluate the viability of the use of charcoal fines in Portland cement to reuse the material in clinker Portland production. To achieve the proposed goal, fines were fractionated in different particle sizes. Each size fraction was characterized regarding its ash content, proximate analysis, and calorific value. The results allowed to relate size fraction with ash content and calorific value. The results revealed that coarser size fractions (retained in 0,500 mm) presented lower ash content and calorific value. Furthermore, such size fractions correspond to 24,04 % in mass of material.

     

  • References

    1. Alsop PA (2019), The Cement Plant Operations Handbook. Tradership Publications Ltd: Dorking, UK.
    2. Araujo, AC, Valadão GES (2007) Introdução ao Tratamento de Minérios. Editora UFMG: Belo Horizonte, pp.27-60.
    3. World Bank. Increasing the use of alternative fuels at cement plants: international best practice. IFC, Washington, US.
    4. Chinyama MPM (2011), Use of Alternative Fuels in Cement Industry. Intech Open, London, UK, pp.263-284.
    5. Rahman, A. et al. "Recent development on the uses of alternative fuels in cement manufacturing process", Fuel, Vol. 145, No. 4, (2015) pp. 84-89, available online: https://doi.org/10.1016/j.fuel.2014.12.029.
    6. Martínez LMT, Kharissova OV, Kharisov BI (2019), Handbook of ecomaterials. Springer, Cham, Switzerland, pp.1184-1201. https://doi.org/10.1007/978-3-319-68255-6.
    7. Chatterjee AK (2018), Cement Production Technology. CRC Press: London, UK, pp. 103-139. https://doi.org/10.1201/9780203703335.
    8. de Jesus LGM (2020). Avaliação da pré-redução de briquetes de finos de minérios de manganês em ambientes análogos aos fornos elétricos a arco submerso. [Doctoral dissertation, Federal University of Rio Grande do Sul], available online: http://hdl.handle.net/10183/214514, last visit: 11.09.2023.
    9. ASTM. (2021). Standard Practice for Proximate Analysis of Coal and Coke (D3172-13). West Conshohocken, USA: American Society for Testing and Materials.
    10. ASTM. (2019). Standard Test Method for Gross Calorific Value of Coal and Coke (D5865). West Conshohocken, USA: American Soci-ety for Testing and Materials.

  • Downloads

  • How to Cite

    Mendes Bernal, A., Messias Soares, M., & Gustavo Mendes de Jesus, L. (2023). Study of recycling of carbon tailings from Portland cement pro-duction. International Journal of Scientific World, 9(2), 20-24. https://doi.org/10.14419/2x8ptx81