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采用旋转试棒法测定了镁白云石质耐火材料在一般转炉初期和末期渣中的蚀损速度。实验结果表明,尽管初期渣侵蚀试验的温度比末期渣实验温度低100℃,初期渣对镁白云石材料的侵蚀速度仍然是末期渣侵蚀速度的8.5倍;初期渣对镁白云石材料的侵蚀速度随着炉渣碱度提高而迅速下降;末期渣碱度的变化对侵蚀速度无明显影响;随着末期渣实验温度的提高,侵蚀速度迅速上升,1700℃时竟达1600℃时的14倍之多。本文通过热力学分析,讨论了一般转炉初期渣和末期渣对镁白云石材料的侵蚀机理。
Rotating test rod method was used to determine the loss rate of magnesium dolomite refractory in the initial and final slag of common converter. The experimental results show that although the initial slag erosion temperature is lower than the final slag test temperature 100 ℃, the initial slag on the magnesium dolomite erosion rate is still 8.5 times the final erosion rate of slag; initial slag magnesium dolomite erosion rate With the increase of slag basicity, the corrosion rate decreases rapidly. The change of slag basicity has no significant effect on the erosion rate. With the increase of final slag temperature, the erosion rate rapidly increases, reaching 14 times as much as 1600 ℃ at 1700 ℃ . In this paper, thermodynamic analysis is conducted to discuss the erosion mechanisms of magnesium and dolomite in the initial and final slag of converter.