Conversion of sandy tailing from banded iron formation exploitation into glass-ceramic materials

Materials Research

Valéria Alves Rodrigues De Melo²  Fernando Soares Lameiras²  Evandro Tolentino¹ 

[1] ,Universidade Federal de Minas Gerais Comissão Nacional de Energia Nuclear Centro de Desenvolvimento de Tecnologia NuclearBelo Horizonte MG ,Brazil

关键词: glass-ceramic;    sandy tailing;    steelwork slag;   

DOI  :  10.1590/S1516-14392011005000098

来源: SciELO

【 摘 要 】

Glass-ceramic materials made of 40.0 wt. (%) of sandy tailing from banded iron formation exploitation and 60 wt. (%) of slag from steelwork were analyzed. Vitrification was obtained by heating the batch samples up to 1400 °C for 1 hour and quenching the melt on a stainless steel plate. Devitrification was obtained by heat-treating the as-quenched glass samples in isothermal conditions at 750 and 1000 °C for 2 hours. FTIR spectroscopy analysis on the devitrified samples indicates a peak shift towards higher wave number with respect to the as-quenched glass because of the crystallization. XRD analysis revealed the presence of crystalline diopside CaMgSi2O6 as the major phase in the glass samples isothermally heat-treated at 1000 °C. Results also indicated that the devitrification at 1000 °C and an incipient devitrification at 750 °C resulted into harder glass-ceramic materials.

【 授权许可】

CC BY   
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