高镁铝高炉渣的冶金性能

在实验室条件下，研究高炉渣中MgO及Al2O3质量分数对高炉渣冶金性能的影响规律。试验结果表明，当高炉渣碱度为1.1、MgO质量分数为12%不变时，随着Al2O3质量分数的增加，高炉渣熔化性温度逐渐增加，且当Al2O3质量分数超过17.5%时，高炉渣初晶相由黄长石区域转变成尖晶石区域，而且在1500℃时，高炉渣黏度逐渐增加而渣铁硫分配比降低；当高炉渣碱度为1.1、Al2O3质量分数为20%不变时，随着MgO质量分数的增加，熔化性温度先降低后增加，当MgO质量分数超过11.8%时，高炉渣初晶相由黄长石区域转变成尖晶石区域，而且在1500℃时，高炉渣黏度逐渐降低而渣铁硫分配比增加。

Metallurgical properties of blast furnace slag with higher Al2O3 and MgO content

The effect of MgO and Al2O3 content on metallurgical properties of blast furnace slag is investigated under experimental conditions. The result showed that when the basicity and the MgO content of the blast furnace slag were 1.1 and 12 %, respectively, the melt temperature of the blast furnace slag increased with the increase of Al2O3 concent. Besides, when the Al2O3 content exceeded 17.5%, the primary phase was transformed from melilite to spinal. Furthermore, at 1500℃, the increase of Al2O3 content caused the viscosity to be enhanced whereas the sulfur distribution ration to be decreased. On the other hand, in the case that basicity was 1.1 and Al2O3 content was 20 %, the increase of MgO content made a drop followed a rise of melt temperature. Particularly, when the MgO content was higher than 11.8%, melilite instead of spinal as the primary phase was formed. In addition, at 1500℃, as the MgO content increased, viscosity of the blast furnace slag gradually decreased and the sulfur distribution ratio increased.