Abstract
In this study, the behavior of glass-ceramics synthesized from a glass frit of FFW (Final Flotation Waste) originated from the RTB Bor Company was investigated. Thermal shock resistance was monitored in order to assess the possibility of application of such waste material. Thermal shock of the samples was conducted using water quench test. Image analysis and ultrasonic measurements were used as nondestructive methods for quantification of thermal shock damage at the surface and in the bulk of the specimens. Phase composition of samples was determined by X-ray powder diffraction (XRPD). The degradation level of samples was about 43 % after 20 cycles of water quench tests. The results pointed out that glass-ceramic material exhibited good thermal shock resistance.
Highlights
Extraction of copper, flotation enrichment and pyro-metallurgical processing, results in the formation of waste materials which produce major environmental pollution problems
Results of UPVT measurements suggest that sampled material was very stable. These results indicate that the number of nucleated cracks did not resolute in the rapid degradation of strength and Young modulus of elasticity, samples showed an excellent thermal shock behavior
Where σo is a compressive strength of the material before the exposure to the thermal shock testing, VP,S is the velocity of ultrasonic waves after testing, VP0,S0 is the velocity of ultrasonic waves
Summary
Extraction of copper, flotation enrichment and pyro-metallurgical processing, results in the formation of waste materials which produce major environmental pollution problems. Flotation waste dumps and slag from smelters degraded large areas of land and cause permanent pollution of soil, water, and air. Recycling of industrial waste material is a very frequent subject of numerous works [2,3,4,5,6,7,8], in which a glassceramics is being obtained by the process of vitrification. For the most of ceramic or refractory materials, thermal shock resistance is one of the main properties to be investigated. Most of the tests for the determination of thermal shock resistance are based on heating and quenching sample into a different medium (water or air). The number of cycles that samples withstand represents the measure of their thermal stability
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