
碳化硅砖描述
碳化硅砖是以碳化硅为主要原料制成的耐火材料。莫氏硬度为 9。对酸性炉渣更稳定。含 SiC 72% ~ 99%。分为粘土结合、Si3N4结合、Sialon结合、β-SiC结合、Si2ON2结合和再结晶碳化硅砖。一般以黑色碳化硅(SiC含量大于96%)为原料,加入粘结剂(或不加粘结剂),经配料、搅拌、成型、烧成等工序制备而成。主要品种有氧化物结合碳化硅砖、碳结合碳化硅砖、氮化物结合碳化硅砖、自结合碳化硅砖、再结晶碳化硅砖、半碳化硅砖等,具有耐磨性好、耐腐蚀、高温强度高、热震稳定性好、导热系数高、热膨胀系数小等特点。是一种高性能耐火材料。



凯瑞碳化硅砖技术数据表
项目/等级 | GM1650 | GM1600 | GM1550 |
---|---|---|---|
ω(Al2O3) ≥/% | 65 | 63 | 60 |
体积密度 ≥/(g/cm³) | 2.65 | 2.60 | 2.55 |
表观孔隙率 ≤/% | 17 | 17 | 19 |
冷压强度 ≥/MPa | 85 | 90 | 90 |
0.2MPa 耐火地下负荷 T0.6 ≥/℃ | 1650 | 1600 | 1550 |
抗热震性(1100℃,水冷)≥/次 | 10 | 10 | 12 |
环境温度下的耐磨损性 ≥/cm3 | 5 | ||
热膨胀/% | / |
碳化硅砖的优点
高温稳定性
碳化硅砖可以承受极高的温度,通常在 1500°C 以上,甚至高达 1800°C。因此,它在冶金、化工、玻璃等高温工业领域有着广泛的应用。
卓越的防火性能
碳化硅砖具有出色的耐火性,并能抵抗化学腐蚀和高温侵蚀。它在酸性和碱性环境中表现优异,不易受到熔融金属和玻璃的侵蚀。
高强度和耐磨性
碳化硅砖具有极高的硬度和耐磨性,在高温高压等恶劣工作环境下可长期使用而无磨损。
出色的导热性
碳化硅砖的导热系数是耐火材料中最高的,碳化硅砖的导热系数是耐火材料中最高的,能迅速将热量传递到整个结构中,提高热效率和节能效果。
良好的热冲击稳定性
碳化硅砖具有较低的热膨胀系数和良好的热震稳定性,可承受温度急剧变化引起的热应力,降低热震损坏的风险。
碳化硅砖的应用
冶金工业
碳化硅砖常用于冶金钢缸内衬、喷嘴、塞子、高炉炉底和炉膛,以及无水冷滑轨的加热炉。它能承受极高的温度和化学侵蚀,同时具有出色的导热性,确保冶金过程的高效进行。
化学工业
在化学工业中,碳化硅被用于油气发生器和有机废物燃烧炉。碳化硅的耐腐蚀性和稳定性使其能够承受酸性、碱性和高温环境,有效保护设备不受化学物质的侵蚀。
玻璃行业
碳化硅砖用作玻璃熔化炉的耐火衬里材料,可承受高温玻璃液的侵蚀和持续的热循环,确保稳定高效的玻璃生产。
电力行业
在电力行业,碳化硅砖广泛应用于燃煤锅炉、电站锅炉和焚烧炉等高温设备。它能承受高温和热应力,同时具有良好的导热性,可保护设备免受高温燃烧气体和炉渣的影响。
钢铁工业
碳化硅砖可用于有色金属熔炼炉、蒸馏塔托盘、电解槽侧壁和熔化金属坩埚。
陶瓷工业
高科技陶瓷窑具铝电解槽内衬、熔铝导管和陶瓷窑具、大中型高炉下体、炉腰和炉胆、炼铝炉内衬、锌蒸馏罐内衬等。
碳化硅砖的分类
粘土结合碳化硅砖
Clay-bonded silicon carbide bricks are refractory products fired with silicon carbide as the main raw material and clay as the binder. It is characterized by high thermal conductivity, small thermal expansion coefficient, good thermal shock resistance and wear resistance, and is the earliest developed type of silicon carbide brick.
This product is used as kiln furniture for ceramic kiln (shelf board, bracket, sagger, etc.), muffle cover for muffle furnace, lining brick for aluminum refining furnace, retort tank for zinc distillation furnace, cooler for cement rotary kiln, etc.
氮化硅结合碳化硅砖
Silicon nitride bonded silicon carbide brick is a refractory product made of SiC and Si powder and fired by nitriding. It is characterized by Si3N4 as the binding phase. Si3N4 exists between SiC grains in the form of acicular or fibrous crystals, and is an important new refractory material.
Silicon nitride combined with silicon carbide bricks are mainly used as the inner lining of the lower part of the blast furnace body, which is more than double the service life of traditional refractory materials. In addition, it can be used as the lining of the aluminum reduction electrolytic cell and ceramic kiln furniture, which has energy saving, improved service life, and It has the advantages of polluting the environment, and can also be used as a brick for the water-cooled pipe sleeve of the tuyere of a blast furnace.