Tecnologia em Metalurgia, Materiais e Mineração (Sep 2012)

THERMODYNAMIC AND KINETIC PARAMETERS OF MIXTURES DESULFURIZING THE MADE WITH CaO, MgO, SiO2 AND CaF2

  • Felipe Nylo de Aguiar,
  • Heitor Cristo Clem de Oliveira,
  • Sayd Farage David,
  • Ramiro da Conceição Nascimento,
  • José Roberto de Oliveira

DOI
https://doi.org/10.4322/tmm.2012.034
Journal volume & issue
Vol. 9, no. 3
pp. 242 – 249

Abstract

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This paper presents an analysis of the kinetics and thermodynamics of marble residue mixtures utilisation on desulfurization of pig iron. The desulfurization was carried out using lime, marble residue, fluorite and pig iron. Different mixtures of these materials were added into a bath of pig iron at 1,450°C. Metal samples were collected via vacuum samplers at times of 5, 10, 15, 20 and 30 minutes, in order to check the variation of sulfur content. Based on the results of chemical analysis of the metal and the desulfurizer mixture, the sulfide capacity of mixtures, the sulfur partition coefficient and the sulfur mass transport coefficient values were calculated.The results show the technical feasibility of using marble waste as desulfurizer agent.

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