含硼炉渣对耐火材料的侵蚀

Erosion of Refractory by Boron-containing Slag

在碳管炉和中频感应炉上进行坩埚实验,研究了含硼炉渣对不同耐火材料的侵蚀.静态坩埚实验结果表明,碳化硅、石英和刚玉耐火材料的平均侵蚀厚度分别为0.52,1.03,1.40mm,刚玉耐火材料侵蚀最为严重,石英耐火材料有一定程度的侵蚀,但相对较轻,碳化硅耐火材料侵蚀很少;公斤级中频炉实验结果表明,含硼炉渣对石英坩埚侵蚀程度大于碳化硅坩埚.分析了直接合金化炼钢时含硼炉渣侵蚀耐火材料的机理,通过相图研究了不同种类的耐火材料抗炉渣侵蚀的能力,渣中配加氧化钙添加剂,可减缓炉渣对耐火材料的侵蚀.

The experiments were carried out on the erosion of different refractory materials by boron-containing slag with carbon tube and intermediate frequency furnaces in lab. The results with static crucible showed that the average erosion thickness of carborundum, quartz and alundum refractory materials was 0.52, 1.03 and 1.40 ram, respectively. The erosion of alundum was worst, that of quartz at a certain level, and that of carborundum very little. The results with intermediate frequency furnace showed that the erosion of quartz was much bad than that of carborundum. The erosion mechanism of refractory materials by boron-containing slag was analyzed with direct smelting of alloy. Based on phase diagram of slag, the erosion-resistant ability of different types of refractory by slag was analyzed, and the erosion of refractory could be decreased by addition of CaO agent into slag.