Refractory Brick[2]
Overview
Refractory bricks are ceramic materials engineered to withstand temperatures exceeding 1,000°C without structural failure. They are primarily composed of fireclay (aluminosilicates), silica, or high-alumina raw materials, often with additives like zirconia for specialized grades. Industrial production involves pressing or extruding refractory mixes, followed by high-temperature firing to achieve sintering. Their performance is measured by refractoriness under load (RUL), porosity, and cold crushing strength (CCS).
Physical and Chemical Properties
Standard refractory bricks exhibit low thermal conductivity (0.5–1.5 W/m·K) and porosity levels between 15–30%. High-alumina grades (≥70% Al₂O₃) offer superior acid resistance, while silica bricks excel in alkaline environments. Thermal expansion coefficients range from 0.5–0.9% at 1,000°C. Key testing standards include ASTM C133 (crushing strength) and ASTM C20 (apparent porosity). Insulating varieties have lower density (0.8–1.2 g/cm³) but reduced mechanical strength.
Main Applications
In steelmaking, refractory bricks line blast furnaces (using magnesia-carbon types) and ladles (alumina-graphite). Cement rotary kilns employ basic bricks in burning zones, while glass tanks use fused cast AZS (alumina-zirconia-silica) bricks. Secondary applications include boiler linings in power plants, pizza ovens (cordierite bricks), and laboratory muffles. Specialty shapes like arch bricks and wedge bricks accommodate curved furnace designs.
Safety and Storage
Raw refractory bricks are non-combustible but may release respirable crystalline silica during cutting. OSHA requires P100-rated dust masks for dry cutting operations. Store bricks on pallets with waterproof covers to prevent hydration of chemically bonded types. Used bricks contaminated with heavy metals (e.g., from lead smelting) require hazardous waste disposal. Thermal shock resistance testing should precede installation in cyclic heating applications.
B2B Procurement Guide
Key specifications include alumina content (standard: 35–40%, high-duty: 45–60%, super-duty: 70–90%), service temperature limit (1,300–1,800°C), and brick dimensions (standard: 230×114×64 mm or 9×4.5×2.5 inches). Bulk orders (20+ tons) typically secure 10–15% discounts. Verify supplier certifications like ISO 9001 and check mill test reports for impurity levels (Fe₂O₃ <2% for high-purity applications).
Related Manufacturers
- 主营：高铝耐火砖、耐火砖、粘土耐火砖、异型耐火砖、浇注料
- 主营：高铝砖、刚玉砖、硅莫复合砖、耐火浇注料、耐火喷涂料、耐火可塑料、耐火粘土砖、低蠕变耐火砖、八角筒耐火砖、红柱石耐火砖、高铝浇注料、钢纤维浇注料、碳化硅砖、低气孔粘土砖、莫来石砖、轻质保温砖、轻质保温浇注料、铬刚玉砖、磷酸盐砖、刚玉莫来石浇注料、防渗砖、防渗浇注料、格子砖、高铝聚轻砖、抗剥落高铝砖
- 主营：耐火材料、耐火浇注料、耐火骨料、粘土砖、高铝砖
- 主营：浇注料、高铝砖、一级高铝砖、耐火砖、轻质耐火砖、耐磨耐火浇注料、耐火材料、二级高铝砖、刚玉砖、高铝浇注料、耐酸耐碱浇注料、浇注料预制件
- 主营：磁粉、碳酸钙、沸石粉、耐火砖、介质粉、凹凸棒土、硅藻土、红土黄土、膨润土、粉煤灰、石英砂、膨润土猫砂、矿渣粉、硅灰硅微粉、活性白土、萤石粉、高岭土、珍珠岩粉、陶土、铁砂、贝壳粉、远红外粉、煤粉、花生饼、木粉、钛白粉
- 主营：烧结砖、生态地铺石、陶瓷 pc 砖、耐火砖、耐火浇注料、陶瓷仿石砖、地铺石、pc 砖、陶瓷透水砖、蒸压粉煤灰砖、透水砖、清水墙砖、清水砖、仿古砖、青砖
- 主营：保温砖、烧结砖、浇注料、粘土耐火砖、耐火材料、轻质耐火砖、硅酸铝陶瓷纤维模块、陶瓷纤维毯、陶瓷纤维棉、防火板
- 主营：玻璃粉、火山石粉、云母粉、耐火硅酸铝、云母片、电气石粉、陶瓷砂、石英粉、莫来石粉、硅酸铝粉、轻钙粉、珍珠岩颗粒、透明粉、铝矾土、重钙粉、煅烧高岭土、蛭石、玻璃鳞片、煅烧贝壳粉、硅灰石粉、高硅滑石粉、低硅滑石粉、全加密硅灰、半加密硅灰
- 主营：粘土砖、铝镁碳砖、隔热保温砖、耐火砖、粘土保温砖、保温隔热砖、轻质莫来石砖、磷酸盐耐磨砖
- 主营：硅砖、硅砂、硅粉、耐火砖、优质硅砖、熔融石英砖、零膨胀硅砖、玻璃窑硅砖、碳素炉硅砖
- 主营：粉尘爆炸、尺寸测量、纸箱检测、建筑材料防火阻燃测试、成分分析、粉尘涉爆筛选、阻燃等级检测、检测报告、第三方检测机构、防腐等级、WF2户外防腐
- 主营：耐火砖、耐火材料、耐火水泥、耐火砂、高铝耐火砖、刚玉耐火砖、耐火浇注料、耐火匣钵、轻质浇注料
- 主营：刚玉莫来石砖、烧结刚玉砖、氧化铝空心球砖、耐火度高莫来石刚玉砖、锆英石砖、铬刚玉砖、锆莫来石砖、硅线石砖、刚玉浇注料、铬刚玉浇注料、碳化硅浇注料
- 主营：铝矾土、铝矾土粉、高铝粉、耐火砖、耐火泥、耐火浇注料、耐火材料、莫来石、莫来砂、莫来石粉、棕刚玉、白刚玉、石英粉、铝矾土砂、蠕变黏土砖、白刚玉细粉、莫来石刚玉、精铸砂、精铸粉、铸造涂料用粉
- 主营：石油焦、石墨粉、膨胀石墨、耐火材料、海泡石、矿物纤维、云母、蛭石、橡胶颗粒、轮胎粉、漂珠、重晶石、膨润土、碳酸钙、叶腊石、人造石墨、鳞片石墨、木质纤维、喷涂棉、钾长石、氧化铝、铝矾土、滑石粉、配重砂、硅藻土
- 主营：--
- 主营：纤维棉、浇注料、高温胶泥、耐火砖、耐火材料、硅酸铝制品、陶瓷纤维纸、管道保温毯、陶瓷纤维模块
- 主营：碳化硅坩埚、陶瓷管、刚玉制品、耐火砖、95刚玉管、刚玉莫来石管、管式刚玉管、刚玉支撑架、高铝管、碳化硅管、刚玉炉管、碳化硅炉衬、碳化硅炉膛、碳化硅板、碳化硅箱式炉、箱式炉膛、莫来石轻质砖、刚玉莫来石砖、轻质保温砖、烧嘴砖、轻质隔热砖
- 主营：超细硅酸铝粉、硅藻土、膨润土、耐火砖用铝矾土、高岭土、滑石粉、彩砂、透明粉、白炭黑、金刚砂、石墨、海泡石、木粉、轻钙、重钙、玻璃粉、贝壳粉、凹凸棒土、玻璃鳞片、陶土、铝矾土、火山岩、电气石粉、合成云母、赤铁粉