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Preparation method of magnesium aluminate spinel-carbon refractory material taking rare earth as antioxidant
The invention belongs to the technical field of high-temperature materials, and particularly relates to a preparation method of a magnesium aluminate spinel-carbon refractory material taking rare earth as an antioxidant. The preparation method comprises the following steps: firstly, adding fused magnesia-alumina spinel aggregate, fused magnesia-alumina spinel fine powder, crystalline flake graphite, phenolic resin and metal lanthanum into a mixer according to a mass fraction ratio, fully mixing, and then carrying out compression molding on the fully mixed raw materials in a stainless steel mold, finally, heat treatment is conducted for 24 h at the temperature of 180-200 DEG C, and the magnesium aluminate spinel-carbon refractory material with the rare earth element as the antioxidant is obtained. Due to introduction of the rare earth metal lanthanum, oxidation of carbon is delayed, and meanwhile formation of a magnesium oxide compact layer in the magnesium aluminate spinel material is promoted.
本发明属于高温材料技术领域，具体涉及一种稀土为抗氧化剂的镁铝尖晶石‑碳耐火材料制备方法。首先按质量分数比例将电熔镁铝尖晶石骨料、电熔镁铝尖晶石细粉、鳞片石墨、酚醛树脂和金属镧添加至混料机中充分混炼，然后将混炼充分的原料在不锈钢模具中压制成型，最后在180～200℃下热处理24h得到种以稀土元素为抗氧化剂的镁铝尖晶石‑碳耐火材料，本发明稀土金属镧的引入不仅延缓了碳的氧化，同时促进了镁铝尖晶石材料中氧化镁致密层的形成。
Preparation method of magnesium aluminate spinel-carbon refractory material taking rare earth as antioxidant
The invention belongs to the technical field of high-temperature materials, and particularly relates to a preparation method of a magnesium aluminate spinel-carbon refractory material taking rare earth as an antioxidant. The preparation method comprises the following steps: firstly, adding fused magnesia-alumina spinel aggregate, fused magnesia-alumina spinel fine powder, crystalline flake graphite, phenolic resin and metal lanthanum into a mixer according to a mass fraction ratio, fully mixing, and then carrying out compression molding on the fully mixed raw materials in a stainless steel mold, finally, heat treatment is conducted for 24 h at the temperature of 180-200 DEG C, and the magnesium aluminate spinel-carbon refractory material with the rare earth element as the antioxidant is obtained. Due to introduction of the rare earth metal lanthanum, oxidation of carbon is delayed, and meanwhile formation of a magnesium oxide compact layer in the magnesium aluminate spinel material is promoted.
本发明属于高温材料技术领域，具体涉及一种稀土为抗氧化剂的镁铝尖晶石‑碳耐火材料制备方法。首先按质量分数比例将电熔镁铝尖晶石骨料、电熔镁铝尖晶石细粉、鳞片石墨、酚醛树脂和金属镧添加至混料机中充分混炼，然后将混炼充分的原料在不锈钢模具中压制成型，最后在180～200℃下热处理24h得到种以稀土元素为抗氧化剂的镁铝尖晶石‑碳耐火材料，本发明稀土金属镧的引入不仅延缓了碳的氧化，同时促进了镁铝尖晶石材料中氧化镁致密层的形成。
Preparation method of magnesium aluminate spinel-carbon refractory material taking rare earth as antioxidant
一种稀土为抗氧化剂的镁铝尖晶石-碳耐火材料制备方法
PENG ZIJUN (Autor:in) / YUAN LEI (Autor:in) / ZHANG DIYAO (Autor:in) / LIU ZHENLI (Autor:in) / YU JINGKUN (Autor:in)
19.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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