Evaluation of Synthetic High Alumina Blast Furnace Slag Vis-a-Vis its Flow Characteristics |
Author(s): |
Vikash Chandra Dinkar , WIT,LNMU DHARBHANGA; Satyajeet Kumar, KEC, GHAZIABAD |
Keywords: |
Flow Characteristics, Slag-Metal Interface, Slag-Metal Reaction Rates, Factorial Design, Short/Long Slag |
Abstract |
An attempt is made to determine the flow characteristics of synthetic high alumina blast furnace slag prepared in the laboratory in agreement with the compositional variations encountered in the industry using hot stage microscopy (German standard 51730). It is observed that additions of CaO, SiO2, MgO, the major constituents and TiO2, a minor constituent, influence the characteristic temperatures of the slag considerably. From the operational point of view, the combination of high C/S ratio, high MgO and high TiO2 contents in the slag, within the range of compositions investigated, seem to be more beneficial. Here the slag formed is a short slag with a small difference between the melting temperature and flow temperature while the softening temperature is relatively high. Such a slag would soften lower-down the furnace without much interference with the permeability of the furnace bed, yet trickle down soon after it is rendered molten without needing any considerable additional heat input, thus exposing fresh interfaces resulting in enhanced rates of slag-metal reactions/exchanges. Regression analysis equations developed in terms of C/S ratio, MgO contents and TiO2 contents at fixed high alumina content in the slag, using factorial design technique for predicting the characteristic temperatures, are validated through further experimentation with additional ten numbers of synthetic slags. |
Other Details |
Paper ID: IJSRDV4I110421 Published in: Volume : 4, Issue : 11 Publication Date: 01/02/2017 Page(s): 620-625 |
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