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

Abstract

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 CaMgSi 2 O 6 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.

Gold Mine Tailings: A Potential Source of Silica Sand for Glass Making

“…Edem et al (2014) while using silica sand deposits from a riverbed observed that a lower concentration of Fe 2 O 3 resulted in the formation of tableware and lead crystal glass [22]. In contrast with de Melo et al (2012), a homogeneous shiny dark brown-coloured glass composed of 40.0 wt.% of sandy tailing and 60 wt.% of steelwork slag was observed [56].…”

Characterization of Flotation Tailings From Samarco and Other Varieties of Sand for Use in Sand Molding in the Foundry Industry

“…The main itabiritic ore processing plants in Brazil operate through reverse cationic flotation to produce hematitic concentrate as main product and a sandy material as flotation tailing, which are normally stored in the tailings dams. The alternatives for utilization of these flotation tailings from the itabirite processing can be considered as a strategy for waste utilization and to minimize harmful effects in respect of environmental aspects, besides contributing to reducing the amount of tailings stored in the dams, apart from economic advantages of waste utilization [2]. There are many other existing reuse practices, for theses materials such as the manufacture of ceramics, use in pavements, and other applications [2][3][4].…”

“…The alternatives for utilization of these flotation tailings from the itabirite processing can be considered as a strategy for waste utilization and to minimize harmful effects in respect of environmental aspects, besides contributing to reducing the amount of tailings stored in the dams, apart from economic advantages of waste utilization [2]. There are many other existing reuse practices, for theses materials such as the manufacture of ceramics, use in pavements, and other applications [2][3][4]. In this work, use of these tailings as base sand for mold making in the foundry industry is investigated.…”