Thermodynamic Calculation and In-situ Observation of Melt Formation Behavior for Artificial Iron Ore Agglomerates

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  • 模擬鉄鉱石の融液生成挙動の熱力学平衡計算とその場観察による評価
  • モギ テッコウセキ ノ ユウエキ セイセイ キョドウ ノ ネツリキガク ヘイコウ ケイサン ト ソノバ カンサツ ニ ヨル ヒョウカ

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The influences of temperature, CaO/SiO2 and Al2O3 content on the melt formation behavior of slag in FeO-CaO-SiO2-Al2O3 system were investigated by a thermodynamic calculation. In-site observations of artificial iron ore agglomerates on the melt formation behavior of slag in FeO-CaO-SiO2-Al2O3 system were carried out by a scanning laser microscope mounted with a heating device. It is evaluated from the thermodynamic calculation that CaO/SiO2 and Al2O3 content greatly influence the amount of molten slag with high FeO. The initial melt formation shifts toward high temperature with increasing CaO/SiO2 and with decreasing Al2O3 content, and the amount of melt also decreases. The melt formation behavior by the in-site observations was in reasonable agreement with the thermodynamic calculations, and therefore the thermodynamic calculation is useful to evaluate the melt formation behavior of iron ore agglomerates.

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