Effect of Al2O3 Concentration on Density and Structure of (CaO-SiO2)-xAl2O3 Slag

Ramaraghavulu Rajavaram, Hyelim Kim, Chi Hoon Lee, Won Seung Cho, Chi Hwan Lee, Joonho Lee

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Abstract

The effect of Al2O3 concentration on the density and structure of CaO-SiO2-Al2O3 slag was investigated at multiple Al2O3 mole percentages and at a fixed CaO/SiO2 ratio of 1. The experiments were conducted in the temperature range of 2154 K to 2423 K (1881 °C to 2150 °C) using the aerodynamic levitation technique. In order to understand the relationship between density and structure, structural analysis of the silicate melts was carried out using Raman spectroscopy. The density of each slag sample investigated in this study decreased linearly with increasing temperature. When the Al2O3 content was less than 15 mole pct, density decreased with increasing Al2O3 content due to the coupling of Si (Al), whereas above 20 mole pct density of the slag increased due to the role of Al3+ ion as a network modifier.

Original languageEnglish
Pages (from-to)1595-1601
Number of pages7
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume48
Issue number3
DOIs
Publication statusPublished - 2017 Jun 1

ASJC Scopus subject areas

  • Engineering(all)

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