Silica-alumina refractories are extensively served as smelter linings for scrap brass due to their good thermal insulation and cost advantage, yet the sudden failure of refractory caused great disturbance to industrial production, such as furnace stoppage. Thus, the corrosion behavior of the silica-alumina refractory exposed to scrap brass slag was researched. Based on the element occurrence states of slag and refractory, the possible reactions between them were first determined to analyze the thermodynamic feasibility. Then, the effects of temperature and time on corrosion behavior were investigated by static laboratory tests. At the slag-refractory interface, the products of continuous reaction were presented. Three parts of the corrosion process were ascertained: (1) The solid oxides (ZnO, CuO, Cu₂O, PbO, etc.) reacted with the compounds of the refractory; (2) The injected liquid composition (NaF, Cu, Pb, Zn, etc.) further reacted with the refractory; (3) The gas phase (fluorine vapor and zinc vapor) invaded and reacted with the interior refractory. Furthermore, it is concluded from the static laboratory tests that the consumption rate of refractory increased by 8.5412 * 10⁻⁴ g/day per 100 °C rise, and an intact brick was entirely corroded in 41.40 days. In the industrial process, continuous chemical corrosion and discontinuous physical damage led to the refractory failure. Lastly, the suggestions for prolonging the service life of refractory were proposed. This study will provide guidance for industrial application of silica-alumina refractory in scrap brass production, which has important implications for the green recycling of scrap brass.

硅铝耐火材料由于其良好的隔热性和成本优势被广泛用作废黄铜的冶炼炉衬，但耐火材料的突然失效给工业生产造成了很大的干扰，例如停炉。因此，研究了暴露于废黄铜渣的硅铝耐火材料的腐蚀行为。根据熔渣和耐火材料的元素赋存状态，首先确定它们之间可能发生的反应，分析热力学可行性。然后，通过静态实验室试验研究了温度和时间对腐蚀行为的影响。在渣-耐火界面处，呈现出连续反应的产物。确定腐蚀过程的三个部分： (1) 固体氧化物（ZnO、CuO、Cu ₂O、PbO等）与耐火材料的化合物反应；(2)注入的液态组合物(NaF、Cu、Pb、Zn等)进一步与耐火材料反应；(3)气相(氟蒸气和锌蒸气)侵入并与内部耐火材料发生反应。此外，通过静态实验室测试得出，耐火材料消耗率增加了8.5412 * 10 ^-4 g/天每升高 100°C，一块完整的砖在 41.40 天内完全腐蚀。在工业过程中，连续的化学腐蚀和不连续的物理损伤导致耐火材料失效。最后提出了延长耐火材料使用寿命的建议。本研究将为硅铝耐火材料在废黄铜生产中的工业应用提供指导，对废黄铜的绿色回收利用具有重要意义。