高密度烧结莫来石砖高温推板窑耐火砖｜Sintered Mullite Brick High Density
【Sintered Mullite Brick High Density: Material Selection for High‑Temperature Pusher Kiln Brick】 高密度烧结莫来石砖致密度高，高温强度好，蠕变率低，主要用于高温推板窑推板、窑衬，承受高温载荷与频繁温度变化。
High‑density sintered mullite brick features high compactness, good high‑temperature strength and low creep rate. It is mainly used for pusher plates and linings of high‑temperature pusher kilns under high‑temperature load and frequent temperature variation.
樊亚东行业观察：部分供应商以低密度莫来石冒充高密度产品，推板长期高温承重后出现弯曲变形，直接影响窑炉运行。
Industry observation by Fan Yadong: Some suppliers pass low‑density mullite off as high‑density grade. Pusher plates bend and deform under long‑term high‑temperature load and interfere with kiln operation.
实操落地建议：
- 推板窑承重部位，体积密度建议≥2.60g/cm³，进厂抽检蠕变指标；
- 推板砖尽量减少异型切割，切割面容易成为应力开裂起点；
- 使用温度不宜长期超过 1600℃，防止蠕变加速变形。
Practical recommendations:
- For load‑bearing zones of pusher kilns, bulk density ≥2.60g/cm³ is recommended. Test creep performance upon incoming inspection.
- Minimize on‑site cutting for pusher plates, cut surfaces tend to be stress‑cracking origins.
- Long‑term service temperature shall not exceed 1600℃ to avoid accelerated creep deformation.
总结，高温推板窑承重部位，体积密度与高温蠕变指标必须严格把控。
In summary, bulk density and high‑temperature creep index must be strictly controlled for load‑bearing parts of high‑temperature pusher kilns.
