烧结锆莫来石砖有色金属炉抗侵蚀耐火砖｜Zirconia-Mullite Sintered Brick

中文 烧结锆莫来石砖依靠莫来石‑氧化锆复合相，抗金属熔液、炉渣侵蚀能力突出，抗热震性能优于电熔锆莫来石，多用于铜、铝等有色金属熔炼炉关键内衬部位。

English Sintered zirconia‑mullite brick adopts composite mullite‑zirconia phase. It offers good resistance against molten metal and slag, and better thermal‑shock resistance than fused zirconia‑mullite brick. It is widely used for critical lining sections of copper, aluminum and other non‑ferrous smelting furnaces.

中文 樊亚东行业观察：部分采购只对比 Al₂O₃指标，忽略 ZrO₂含量。遇到过项目 ZrO₂占比偏低，投产半年就出现渗透剥落，使用寿命远达不到预期。

English Industry observation by Fan Yadong: Some purchasers only compare Al₂O₃ value while ignoring ZrO₂ content. One field case shows bricks with low ZrO₂ suffer penetration and spalling within half‑year operation, service life far below expectation.

中文 实操落地建议：

1. 有色金属熔炼炉工况，优先选用 ZrO₂≥12% 烧结品级，进厂做抗渣渗透小样比对；
2. 砌筑配套锆莫来石专用耐火泥浆，不混用普通高铝泥浆；
3. 长期使用温度不宜超过 1550℃，超温会加速玻璃相析出，加速砖体损毁。

English Practical recommendations:

1. For non‑ferrous smelting furnaces, select sintered grade with ZrO₂ ≥12%. Carry out small‑scale slag penetration test for incoming materials.
2. Use special zirconia‑mullite refractory mortar for masonry, do not mix ordinary high‑alumina mortar.
3. Long‑term service temperature shall not exceed 1550℃. Excessive temperature accelerates glass‑phase precipitation and brick degradation.

中文 总结，烧结锆莫来石砖适合有色金属炉侵蚀部位，氧化锆含量、致密度是决定服役寿命的关键。

English In summary, sintered zirconia‑mullite brick fits corrosive zones in non‑ferrous furnaces. ZrO₂ content and bulk density dominate its actual service life.