Tecnologia em Metalurgia, Materiais e Mineração (Jun 2015)

GRANITE CUTTING WASTE: TECHNOLOGICAL INNOVATION FOR THE FINAL DESTINATION

  • Joner Oliveira Alves,
  • Eduardo Junca ,
  • Denise Crocce Romano Espinosa,
  • Jorge Alberto Soares Tenório

DOI
https://doi.org/10.4322/2176-1523.0856
Journal volume & issue
Vol. 12, no. 2
pp. 123 – 128

Abstract

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The granite processing market is one of the most promising business areas of the mineral sector, with an average growth of the world production of about 6% per year. The granite extraction generates residues in the form of powder rock of 20-25 wt.% of the total benefited. The granite dust must be carefully managed since it can cause siltation of rivers and human health risks. This paper presents two routes for the final destination of this waste: the vitrification process aiming the production of fibers for thermo-acoustic insulation, and the magnetic separation in order to recover the steel grit. Results showed that the forms of treatments presented are economically and ecologically viable since they represent a cost reduction in the waste disposal, and also provide the production of new materials with commercial value.

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