Characterization of Ornamental Stones Wastes for Use in Ceramic Materials

Abstract:

Ornamental stones processing produces large amounts of wastes, which without treatment, are disposed in deposits, constituting the major environmental problem in this sector in Brazil. There is a great variety of rocks and different technologies in the ornamental stones processing. Rock block sawing can be performed using multi-blade gangsaw, the conventional technology, or multiwire gangsaw, latest technology which uses only diamond wire and water to cut blocks. In recent years there has been a great change in the use of ornamental stones sawing technologies, where currently almost 50% of the sawed materials are processed by the multi wire technology. The ornamental stones wastes have compounds that can collaborate in the processing of the ceramic. Due to the great variety of Brazilian ornamental stones and technologies in addition to the growth of de sector in recent years, there is a need for new studies regard to the characterization and environmental classification of waste, for a better management and application. Therefore, the objective of this work was the characterization and environmental classification of ornamental stones wastes aiming their use in red ceramics. The wastes were characterized with the determination of its chemical composition and mineralogical analysis, particle size, morphological analysis and environmental, the latter by means of the leaching and solubilization tests, for subsequent classification. The wastes are composed mainly of SiO₂, Al₂O₃, alkaline oxides, earth alkaline oxides and iron, and those which were submitted to the leaching and solubilization tests are classified as non-inert.

• Periodical: Materials Science Forum (Volume 958)
• Pages: 129-134
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.958.129
• Online since: June 2019
• Authors: Monica Castoldi Borlini Gadioli*, Victor M. Ponciano, Bárbara da Hora Rocha Bessa, Jefferson Luiz Camargo, Pedro Porto Pizeta
• Keywords: Characterization, Ornamental Stones, Processing, Waste

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