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- Title
Purificação de resíduos de oficina de artesanato em pedra-sabão por flotação e alvejamento químico.
- Authors
Marques Rodrigues, Michael Leonardo; Fernandes Lima, Rosa Malena
- Abstract
In the Ouro Preto - MG region, there are several soap stone workshops where artesans create souvenirs and pans. This activity produces a large amount of residues which are discarded without any control. The objective of this work was to recover the talc mineral present in the size fraction below 74µm of these residues by froth flotation and chemical leaching with HCl. Among the flotation variables studied, only the percentage of solids and frother dosage proved to be significant for mass recovery and whiteness. This process produced a concentrate whose whiteness (ISO) was 68.56% and whose chemical composition meets paint and paper standards. After chemical leaching of the flotation concentrate, a whiteness of 84% was obtained and its chemical composition met the specifications of the plastic and anti-adherant plastic industries.
- Subjects
SOAPSTONE; TALC; FLOTATION; LEACHING; SOLIDS; PLASTICS industries
- Publication
Rem: Revista Escola de Minas, 2011, Vol 64, Issue 3, p353
- ISSN
0370-4467
- Publication type
Article
- DOI
10.1590/S0370-44672011000300015