Micronization of the pesticide chlorothalonil with different ball types
Keywords:Micronization; Ball type; Microparticles and nanoparticles; Optimal particle size.
To achieve micronization in micro and nanoparticle agitator mills are often used. Also used are balls for the grinding step, which are: glass balls, zirconium silicate balls and zirconium oxide balls. A suspension with the active ingredient chlorothalonil at 700 g/L was prepared, being 2 liters for each type of balls. For this, a 1 liter grinding chamber with 0.7 liters of balls was used. The rotation of the mill was set at 2000 rpm and the rotation of the feed pump at 250 rpm. In addition, the temperature of the product, before grinding, was 26°C. The micronization with the glass balls during the process presented the lowest temperature 30°C, but with the lowest flow rate 0.09 L/min and the longest grinding time with 32 minutes. With zirconium silicate balls, the temperature reached was 38°C, the flow rate was 0.15 L/min and the grinding time was 20 minutes. The best result obtained was with the zirconium oxide balls, but with the highest temperature 42°C, but with the highest flow rate 0.19 L/min, and the shortest grinding time with 16 minutes, respectively. When determining the price of kWh consumed by the equipment when using the different types of balls, it was found that, with the zirconium oxide balls, a savings of up to 50% of the electricity consumption is achieved, compared to the use of glass balls. Comparing zirconium silicate balls with glass balls, a 37% savings in consumption is achieved. Finally, with zirconium oxide balls being compared to zirconium silicate, a 25% savings in electricity consumption was obtained.
ABNT NBRNM188. Materiais metálicos – Dureza Vickers – Parte 1: Medição da dureza Vickers - Parte 2: Calibração de máquinas de medir dureza Vickers – Parte 3: Calibração de blocos padrão a serem usados na calibração de máquinas de medir dureza Vickers, 1999.
Barbosa, R. S., Souza, J. P., Almeida, D. J., Santos, J. B., Paiva, W. S., & Porto, M. J. (2020). As possíveis consequências da exposição a agrotóxicos: uma revisão sistemática. Research, Society and Development. 9(11). http://dx.doi.org/10.33448/rsd-v9i11.10219.
Botelho, M. G. L., Pimentel, B. S., Furtado, L. G., Lima, M. G. S., Carneiro, C. R. O., Batista, V. A., Marinho, J. L. M., Monteiro, A. L. P. R., Silva, T. P., Pontes, A. N., & Costa, M. S. S. (2020). Agrotóxicos na agricultura: agentes de danos ambientais e a busca pela agricultura sustentável. Research, Society and Development, 9(8). http://dx.doi.org/ 10.33448/rsd-v9i8.6181.
Callister, W. D. Ciência e Engenharia de Materiais - uma Introdução. LTC, 2002.
CHEBI. Nome de registro clorotalonil. http://www. ebi.ac.uk /chebi/Search Id.do.
Ferreira, M. Lei de Hooke. Revista de Ciência Elementar, 2014. 10.24927/rce 2014.103.
Massarani, G, Fluidodinâmica em Sistemas Particulados; Programa de Engenharia Química COPPE/Universidade Federal do Rio de Janeiro. (2a ed.).
Macbean, C. e-pesticide Manual. (15a ed.), Ver. 5.1, Alton, UK. British Crop Protection Council. Clorotalonil (1897-45-6), 2010.
Multiesferas. Tipos de moinhos. http://www.multiesferas. com.br/esferas-de-óxido-de-zircônio.
Nandi, V. S. & Montedo, O. R. K. (2009). Otimização do Processo de Moagem de Engobes Cerâmicos para Produção de Revestimento. Cerâmica Industrial. 14 (4), 24–8.
Ohenoja, K. (2014). Particle size distribution and suspension stability in aqueous submicron grinding of CaCO3 and TiO2. 86 p. Doktoral Thesis, Faculty of Technology - University of Oulu, Finland.
Oliveira, M. F (2017). Moinhos de bolas. In: Processos de Fabricação. Apostila. Pós-Graduação em Engenharia de Superfícies e Tintas - Faculdades Oswaldo Cruz.
Pereira, L. M., Stumm, E. M. F., Buratti, J. B. L., Silva, J. A. G., Colet, C. F., & Pretto, C. R. (2020). A utilização de fungicida no cultivo de aveia: uma revisão integrativa da literatura. Research, Society and Development, 9(8). http://dx.doi.org/ 10.33448/rsd-v9i8.6181.
Rocha, B. C., Teixeira, G. F., Trindade, R., S. Arruda, E. B., & Souza, D. L. (2020). Projeto, construção e operação de um moinho de bolas em escala piloto. Research, Society and Development, 9(8). http://dx.doi.org/10.33448/rsd-v9i8.5149.
Salomão, P. E. A., Ferro, A. M. S., & Ruas, W. F. (2019). Herbicidas no Brasil: uma breve revisão. Research, Society and Development, 9(2). http://dx.doi.org/ 10.33448/rsdv9i2.1990.
Soesferas (2021). Esferas de vidro. https://Soesferas.com.br/esferas.
Truesdell, C. The Rational Mechanics of Flexible or Elastic Bodies 1638–1788, 1960. 10.1007/978-3-0348-5015-5.
Ullah, M., Ali, M. E., & Hamid, S. B. A. (2014). Surfactant-assisted ball milling: a novel route to novel materials with controlled nanostructure - a review. Reviews on Advanced Materials Science, 37, 1–14.
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