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Fiber-reinforced magnesian dry material for tundish
The invention discloses a fiber-reinforced magnesian dry material for a tundish. Belongs to the field of refractory material application. Comprising magnesia, resin powder, carbon powder, boron glass powder and fibers. The particle size and the mass percent of the magnesite are as follows: 60-75% of magnesite with the particle size of 0.1-5mm; 20-40% of magnesia with a particle size of less than 0.074 mm; 3-6% of resin powder; 0-3% of powdered carbon; 1-5% of boron glass powder; fiber is added and accounts for 0.05-0.3% of the total mass of the raw materials. A fibrous substance with a high softening point is introduced, a scattered liquid phase existing in situ is formed at a high temperature, micro-sintering of the material is promoted, uniformity and compactness of a microstructure of the material are facilitated, and the strength and high-temperature using performance of the material are improved; besides, a large amount of flowable liquid phases and sporadic liquid phases existing in situ are introduced into the dry material through the boron glass powder and the fibers respectively, medium-high-temperature sintering of the material is fully facilitated, and the problem that pure phenolic resin powder combined with the dry material is free of strength at medium temperature or too low in strength is solved; and the tendency that magnesium inclusions are easily introduced into molten steel due to poor scouring resistance of the dry material is relieved.
本发明公开了一种中间包用纤维增强镁质干式料。属于耐火材料应用领域；包括镁砂、树脂粉、炭粉、硼玻璃粉和纤维；其粒度和质量百分比为：粒度为0.1‑5mm的镁砂：60‑75％；粒度小于0.074mm的镁砂：20‑40％；树脂粉：3‑6％；炭粉：0‑3％；硼玻璃粉1‑5％；纤维外加，占原料总质量的0.05‑0.3％。本发明引入高软化点的纤维物质，高温下形成原位存在的零星分散的液相，促进了材料微烧结，利于材料微观结构的均匀性和致密性，提高材料的强度和高温使用性能；另外，本发明以硼玻璃粉和纤维分别在干式料中引入可流动的大量液相和原位存在的零星液相，充分利于材料的中高温烧结，缓解了纯酚醛树脂粉结合干式料中温无强度或强度过低的问题，减轻了干式料因耐冲刷性差易向钢液引入镁质夹杂物的趋势。
Fiber-reinforced magnesian dry material for tundish
The invention discloses a fiber-reinforced magnesian dry material for a tundish. Belongs to the field of refractory material application. Comprising magnesia, resin powder, carbon powder, boron glass powder and fibers. The particle size and the mass percent of the magnesite are as follows: 60-75% of magnesite with the particle size of 0.1-5mm; 20-40% of magnesia with a particle size of less than 0.074 mm; 3-6% of resin powder; 0-3% of powdered carbon; 1-5% of boron glass powder; fiber is added and accounts for 0.05-0.3% of the total mass of the raw materials. A fibrous substance with a high softening point is introduced, a scattered liquid phase existing in situ is formed at a high temperature, micro-sintering of the material is promoted, uniformity and compactness of a microstructure of the material are facilitated, and the strength and high-temperature using performance of the material are improved; besides, a large amount of flowable liquid phases and sporadic liquid phases existing in situ are introduced into the dry material through the boron glass powder and the fibers respectively, medium-high-temperature sintering of the material is fully facilitated, and the problem that pure phenolic resin powder combined with the dry material is free of strength at medium temperature or too low in strength is solved; and the tendency that magnesium inclusions are easily introduced into molten steel due to poor scouring resistance of the dry material is relieved.
本发明公开了一种中间包用纤维增强镁质干式料。属于耐火材料应用领域；包括镁砂、树脂粉、炭粉、硼玻璃粉和纤维；其粒度和质量百分比为：粒度为0.1‑5mm的镁砂：60‑75％；粒度小于0.074mm的镁砂：20‑40％；树脂粉：3‑6％；炭粉：0‑3％；硼玻璃粉1‑5％；纤维外加，占原料总质量的0.05‑0.3％。本发明引入高软化点的纤维物质，高温下形成原位存在的零星分散的液相，促进了材料微烧结，利于材料微观结构的均匀性和致密性，提高材料的强度和高温使用性能；另外，本发明以硼玻璃粉和纤维分别在干式料中引入可流动的大量液相和原位存在的零星液相，充分利于材料的中高温烧结，缓解了纯酚醛树脂粉结合干式料中温无强度或强度过低的问题，减轻了干式料因耐冲刷性差易向钢液引入镁质夹杂物的趋势。
Fiber-reinforced magnesian dry material for tundish
一种中间包用纤维增强镁质干式料
LIN PENGCHENG (author) / LIU JUN (author) / LI QUANHUI (author) / FENG HAIXIA (author) / TAO BIAO (author) / WANG GANG (author)
2023-04-28
Patent
Electronic Resource
Chinese
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