Abstract
Various efforts are being made to use the industrial wastes as an alternate molding material in foundry industries to conserve the natural resources and effective utilization of the industrial waste to sustain the industrialization. Granulated Blast furnace (GBF) slag and Ferro chrome (Fe-Cr) slag has many of the same attributes of the sand. In this paper investigations were carried out on comparative physical and chemical properties of high silica sand, Fe-Cr slag and GBF slag for foundry applications. Physical and chemical properties like X-ray fluorescence, X-ray diffraction, scanning electron microscopy with energy dispersive spectroscopy, PH analysis, thermo gravimetric and differential thermalanalysis were performed on these three materials. XRF result evident that major phase identified in all the three materials was SiO2. AFS number was found to be 35.49, 45.52 and 42.39 for silica sand, Fe-Cr and GBF slags respectively. Silica sand grains are in spherical shape with a combination of fine and coarse sizes; whereas Fe-Cr and GBF slags appears to be angular shapes. GBF slag has shown lower density compared to either sand or Fe-Cr slag. The average PH values of Silica Sand, Fe-Cr and GBF slags were found to be 7.95, 9.89 and 11.40 respectively. The weight loss for silica sand and Fe-Cr slag was 6% and 15% at 1205 °C and 1053 °C respectively; whereas in case of GBF slag this value was 2.4% at 1000 °C.
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