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Low-heat-conductivity high-strength calcium hexaluminate castable for walking beam of heating furnace
The invention discloses a low-heat-conductivity and high-strength calcium hexaluminate castable for a walking beam of a heating furnace, which is formed by mixing a castable main material and a proper amount of additive, the castable is characterized in that the castable main material is prepared from the following raw materials in parts by mass: 43-87 parts of calcium hexaluminate, 0-20 parts of microporous corundum aggregate, 0.5-5 parts of aluminum oxide hollow spheres, 6-10 parts of calcined aluminum oxide powder, 4-9 parts of activated aluminum oxide micro powder, 0-1 part of nano aluminum oxide and 2.5-12 parts of calcium aluminate cement raw materials, and the sum of the mass parts of all the raw materials is 100 parts; the additive is a water reducing agent and a composite sintering aid. According to the castable, the problem that the heat conductivity, the strength, the oxidation scale resistance and the ferrous silicate corrosion resistance of the heating furnace walking beam refractory castable are difficult to consider at the same time is solved, the heat insulation performance of the castable is improved, the high-temperature mechanical strength of the castable is improved, the service life of the steel rolling heating furnace walking beam castable is prolonged, and the water cooling heat loss is reduced.
本发明公开了一种加热炉步进梁用低导热高强度六铝酸钙质浇注料，由浇注料主料和适量添加剂混合而成，其特征在于：所述浇注料主料由以下原料按质量份数组成：六铝酸钙43‑87份、微孔刚玉骨料0‑20份、氧化铝空心球0.5‑5份、煅烧氧化铝粉6‑10份、活性氧化铝微粉4‑9份、纳米氧化铝0‑1份、铝酸钙水泥原料2.5‑12份，且各原料的质量份数之和为100份；所述添加剂为减水剂和复合烧结助剂。本发明克服了加热炉步进梁耐火浇注料存在的热导率、强度、抗氧化铁皮和硅酸亚铁侵蚀能力难以同时兼顾的问题，改善了浇注料的隔热保温性能，提高浇注料高温力学强度，提高了轧钢加热炉步进梁浇注料使用寿命、减少了水冷热损失。
Low-heat-conductivity high-strength calcium hexaluminate castable for walking beam of heating furnace
The invention discloses a low-heat-conductivity and high-strength calcium hexaluminate castable for a walking beam of a heating furnace, which is formed by mixing a castable main material and a proper amount of additive, the castable is characterized in that the castable main material is prepared from the following raw materials in parts by mass: 43-87 parts of calcium hexaluminate, 0-20 parts of microporous corundum aggregate, 0.5-5 parts of aluminum oxide hollow spheres, 6-10 parts of calcined aluminum oxide powder, 4-9 parts of activated aluminum oxide micro powder, 0-1 part of nano aluminum oxide and 2.5-12 parts of calcium aluminate cement raw materials, and the sum of the mass parts of all the raw materials is 100 parts; the additive is a water reducing agent and a composite sintering aid. According to the castable, the problem that the heat conductivity, the strength, the oxidation scale resistance and the ferrous silicate corrosion resistance of the heating furnace walking beam refractory castable are difficult to consider at the same time is solved, the heat insulation performance of the castable is improved, the high-temperature mechanical strength of the castable is improved, the service life of the steel rolling heating furnace walking beam castable is prolonged, and the water cooling heat loss is reduced.
本发明公开了一种加热炉步进梁用低导热高强度六铝酸钙质浇注料，由浇注料主料和适量添加剂混合而成，其特征在于：所述浇注料主料由以下原料按质量份数组成：六铝酸钙43‑87份、微孔刚玉骨料0‑20份、氧化铝空心球0.5‑5份、煅烧氧化铝粉6‑10份、活性氧化铝微粉4‑9份、纳米氧化铝0‑1份、铝酸钙水泥原料2.5‑12份，且各原料的质量份数之和为100份；所述添加剂为减水剂和复合烧结助剂。本发明克服了加热炉步进梁耐火浇注料存在的热导率、强度、抗氧化铁皮和硅酸亚铁侵蚀能力难以同时兼顾的问题，改善了浇注料的隔热保温性能，提高浇注料高温力学强度，提高了轧钢加热炉步进梁浇注料使用寿命、减少了水冷热损失。
Low-heat-conductivity high-strength calcium hexaluminate castable for walking beam of heating furnace
加热炉步进梁用低导热高强度六铝酸钙质浇注料
LUO WEI (author) / CAO BINGLEI (author) / XIANG YUNPAN (author) / DING CUIJIAO (author) / ZHU SHANHE (author) / LEI TING (author) / YANG CHAO (author)
2023-12-26
Patent
Electronic Resource
Chinese
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