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A platform for research: civil engineering, architecture and urbanism
Low-heat-conductivity refractory brick for ladle working lining and preparation method thereof
The invention discloses a low-heat-conductivity refractory brick for a ladle working lining and a preparation method thereof. The refractory brick is prepared from the following raw materials in percentage by mass: 60 to 70 percent of calcium hexaluminate particles, 5 to 10 percent of corundum fine powder, 3 to 9 percent of aluminum oxide micro powder, 4 to 8 percent of silicon carbide, 5 to 9 percent of a carbonaceous raw material, 3 to 5 percent of an expanding agent, 1 to 3 percent of an antioxidant and 3 to 4 percent of a binding agent. The porosity of the calcium hexaluminate particles is10-26%, the volume density is 2.5-2.8 g/cm<3>, and the particle diameter is 0.088-5 mm. The carbonaceous raw material is composed of at least two of graphite, carbon black and asphalt. The expandingagent is any one of kyanite, andalusite and sillimanite. The antioxidant is one or two of Al, Si and B4C. The binding agent is phenolic resin. A ladle working lining made of the refractory brick is low in heat conductivity coefficient and has good erosion resistance, thermal shock resistance and heat preservation performance.
本发明公开了一种铁水包工作衬用低导热耐火砖及其制备方法，该耐火砖包括以下按质量百分比计的原料：60‑70%的六铝酸钙颗粒、5‑10%刚玉细粉、3‑9%的氧化铝微粉、4‑8%的碳化硅，5‑9%的碳质原料、3‑5%的膨胀剂、1‑3%的抗氧化剂及3‑4%的结合剂。所述的六铝酸钙颗粒的气孔率为10‑26%，体积密度为2.5‑2.8g/cm3，颗粒直径为0.088‑5mm。所述的碳质原料为石墨、炭黑、沥青中的至少两种。所述的膨胀剂为蓝晶石、红柱石、硅线石中的任一种。所述的抗氧化剂为Al、Si、B4C中的一种或任意两种。所述的结合剂为酚醛树脂。采用本发明的耐火砖制成的铁水包工作衬的导热系数低，具有较好的抗侵蚀性、抗热震性和保温性。
Low-heat-conductivity refractory brick for ladle working lining and preparation method thereof
The invention discloses a low-heat-conductivity refractory brick for a ladle working lining and a preparation method thereof. The refractory brick is prepared from the following raw materials in percentage by mass: 60 to 70 percent of calcium hexaluminate particles, 5 to 10 percent of corundum fine powder, 3 to 9 percent of aluminum oxide micro powder, 4 to 8 percent of silicon carbide, 5 to 9 percent of a carbonaceous raw material, 3 to 5 percent of an expanding agent, 1 to 3 percent of an antioxidant and 3 to 4 percent of a binding agent. The porosity of the calcium hexaluminate particles is10-26%, the volume density is 2.5-2.8 g/cm<3>, and the particle diameter is 0.088-5 mm. The carbonaceous raw material is composed of at least two of graphite, carbon black and asphalt. The expandingagent is any one of kyanite, andalusite and sillimanite. The antioxidant is one or two of Al, Si and B4C. The binding agent is phenolic resin. A ladle working lining made of the refractory brick is low in heat conductivity coefficient and has good erosion resistance, thermal shock resistance and heat preservation performance.
本发明公开了一种铁水包工作衬用低导热耐火砖及其制备方法，该耐火砖包括以下按质量百分比计的原料：60‑70%的六铝酸钙颗粒、5‑10%刚玉细粉、3‑9%的氧化铝微粉、4‑8%的碳化硅，5‑9%的碳质原料、3‑5%的膨胀剂、1‑3%的抗氧化剂及3‑4%的结合剂。所述的六铝酸钙颗粒的气孔率为10‑26%，体积密度为2.5‑2.8g/cm3，颗粒直径为0.088‑5mm。所述的碳质原料为石墨、炭黑、沥青中的至少两种。所述的膨胀剂为蓝晶石、红柱石、硅线石中的任一种。所述的抗氧化剂为Al、Si、B4C中的一种或任意两种。所述的结合剂为酚醛树脂。采用本发明的耐火砖制成的铁水包工作衬的导热系数低，具有较好的抗侵蚀性、抗热震性和保温性。
Low-heat-conductivity refractory brick for ladle working lining and preparation method thereof
铁水包工作衬用低导热耐火砖及其制备方法
GAN FEIFANG (author) / WANG TAO (author)
2020-10-20
Patent
Electronic Resource
Chinese
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