The invention discloses a corundum-mullite composite brick, which comprises a refractory layer and a heat insulation layer; the refractory layer is composed of raw material white corundum 35-75 parts, fused or sintered mullite 20-40 parts, andalusite 15-25 parts, alumina powder a 1-5 parts, clay powder 1-5 parts, dextrin 0.2-1.5 parts, industrial phosphoric acid 3-5 parts; the heat insulation layer is composed of raw material light mullite 20-40 parts, 3-0 mm poly light mullite waste brick 10-20 parts. 10-20 parts of calcined kaolin, 1-5 parts of a alumina powder, 5-15 parts of trilith powder, 1-5 parts of sodium bentonite, 5-10 parts of clay powder and 3-5 parts of lignin solution were prepared. The firebrick prepared by the invention consists of a heat-resistant layer and a heat-insulating layer. The working layer and the heat-insulating layer are clearly distinguished and tightly combined, so that a brick body has both high temperature resistance, high compressive strength at room temperature, good thermal shock stability, high load softening temperature, strong corrosion resistance and low thermal conductivity of the heat-insulating brick, which can effectively reduce the temperature of the kiln barrel. Dual characteristics of degree, to achieve the purpose of energy saving and consumption reduction.
【技术实现步骤摘要】
刚玉莫来石复合砖及其制备方法
本专利技术涉及耐火砖,尤其是涉及一种适用于砌筑回转窑外壳的刚玉莫来石复合砖,本专利技术还涉及该复合砖的制备方法。
技术介绍
刚玉质莫来石耐火材料由于具备耐高温、耐腐蚀、高耐磨、抗热震等优良性能,已成功代替刚玉质耐火材料在很多行业得到了广泛应用。但是由于耐火材料的高温性能、体积密度、强度与导热率之间的关系呈正比,即耐火材料的体积密度越高,强度越高,则导热系数就越高,所以刚玉莫来石砖在具备良好的高温性能和较高热震稳定性的同时,密度高、导热率高、热膨胀率高的功能性缺陷也随之而来。现有的刚玉莫来石砖虽具有耐压强度高、抗侵蚀性能好、耐磨损、热震稳定性好等特点,但是导热系数偏高却是该产品的最大弊端。由于回转窑外壳全部裸露在空气中,耐火砖导热系数过高将使回转窑筒体升高,增加燃料消耗,造成资源浪费,使得生产和使用成本高居不下。
技术实现思路
本专利技术的目的在于提供一种刚玉莫来石复合砖,该复合砖兼具刚玉莫来石砖和隔热砖双重特点,可显著降低窑炉筒体温度,达到节能降耗的目的,本专利技术还提供该复合砖的制备方法。为实现上述目的,本专利技术可采取下述技术方案:本专利技术所述的刚玉莫来石复合砖,包括耐火层和隔热层;所述耐火层是由原料白刚玉35~75份,电熔或烧结莫来石20-40份,红柱石15~30份,800~1200目a氧化铝粉1~5份,200目粘土粉1~5份,糊精0.2~1.5份,工业磷酸3~5份配制而成;其中5~3mm白刚玉骨料5~15份,3~1mm白刚玉骨料10~20份,1~0mm白刚玉骨料10~20份,325目白刚玉粉10~20份;3~1mm莫来石 ...
【技术保护点】
1.一种刚玉莫来石复合砖,其特征在于:包括耐火层和隔热层;所述耐火层是由原料白刚玉35~75份,电熔或烧结莫来石20‑40份,红柱石15~30份,800~1200目a氧化铝粉1~5份,200目粘土粉1~5份,糊精0.2~1.5份,工业磷酸3~5份配制而成;其中5~3mm白刚玉骨料5~15份,3~1mm白刚玉骨料10~20份,1~0mm白刚玉骨料10~20份,325目白刚玉粉10~20份;3~1mm莫来石骨料10~20份,1~0mm莫来石骨料10~20份;3~1mm红柱石骨料5~10份,1~0mm红柱石骨料5~10份,200目红柱石粉5~10份;所述隔热层是由原料轻质莫来石20~40份,3~0mm聚轻莫来石废砖10~20份,200目煅烧高岭土10~20份,600目a氧化铝粉1~5份,三石粉5~15份,200目钠基膨润土1~5份,200目粘土粉5~10份和木质素溶液3~5份配制而成;其中4~2mm的轻质莫来石骨料10~20份, 2~1mm的轻质莫来石骨料10~20份。
【技术特征摘要】
1.一种刚玉莫来石复合砖,其特征在于:包括耐火层和隔热层;所述耐火层是由原料白刚玉35~75份,电熔或烧结莫来石20-40份,红柱石15~30份,800~1200目a氧化铝粉1~5份,200目粘土粉1~5份,糊精0.2~1.5份,工业磷酸3~5份配制而成;其中5~3mm白刚玉骨料5~15份,3~1mm白刚玉骨料10~20份,1~0mm白刚玉骨料10~20份,325目白刚玉粉10~20份;3~1mm莫来石骨料10~20份,1~0mm莫来石骨料10~20份;3~1mm红柱石骨料5~10份,1~0mm红柱石骨料5~10份,200目红柱石粉5~10份;所述隔热层是由原料轻质莫来石20~40份,3~0mm聚轻莫来石废砖10~20份,200目煅烧高岭土10~20份,600目a氧化铝粉1~5份,三石粉5~15...
【专利技术属性】
技术研发人员:宋金标,宋彩虹,付鸿正,于建伟,周红丽,
申请(专利权)人:郑州真金耐火材料有限责任公司,
类型:发明
国别省市:河南,41
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