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Unfired Al-SiC refractory material for blast furnace and preparation method thereof
The invention belongs to the field of refractory materials, and particularly relates to an unfired Al-SiC refractory material for a blast furnace and a preparation method of the unfired Al-SiC refractory material. The Al-SiC refractory material comprises the following raw materials: 60-97 wt% of silicon carbide, 2-25 wt% of metal aluminum powder, 1-15 wt% of carbon black, and 3-5 wt% of phenolic resin as a binding agent. The preparation method comprises the following steps: burdening and uniformly mixing the raw materials and the binding agent, carrying out mechanical pressing, and drying at 220-300 DEG C for 12-48 hours to obtain the unfired Al-SiC refractory material. In order to solve the problems that in the prior art, Si3N4 in a Si3N4-SiC refractory material for a blast furnace is invalid in the long-term service process as a binding phase, and the preparation process of the SiC-based refractory material is complicated, Al is innovatively introduced into a SiC matrix, and the high-temperature activity of Al is utilized; the AlN can react with the main atmosphere (N2 (g) + CO (g)) in the blast furnace in the service process to be further converted into high-performance AlN in situ, and the high-performance AlN is subjected to solid solution in a SiC matrix, so that the AlN is stably combined with SiC, and the problems of green preparation of the refractory material and long service life of the SiC-based refractory material for the blast furnace are solved.
本发明属于耐火材料领域，尤其涉及一种高炉用不烧Al‑SiC耐火材料及其制备方法。所述Al‑SiC耐火材料包括如下原料组成：60～97wt％的碳化硅，2～25wt％的金属铝粉，1～15wt％的碳黑，外加3～5wt％的酚醛树脂作为结合剂。将上述原料与结合剂经配料并均匀混合后，机压成型并于220℃～300℃干燥12h～48h，制得不烧Al‑SiC耐火材料。本发明针对现有技术中高炉用Si3N4‑SiC耐火材料中Si3N4作为结合相在长期服役过程中失效以及SiC基耐火材料制备工艺复杂化的问题，创新性地将Al引入到SiC基体，利用Al的高温活性，能够在其服役过程中与高炉中主要气氛(N2(g)+CO(g))反应进一步原位转化为高性能的AlN并固溶到SiC基体中，使其与SiC稳定结合，以解决耐火材料制备绿色化以及高炉用SiC基耐火材料长寿化的问题。
Unfired Al-SiC refractory material for blast furnace and preparation method thereof
The invention belongs to the field of refractory materials, and particularly relates to an unfired Al-SiC refractory material for a blast furnace and a preparation method of the unfired Al-SiC refractory material. The Al-SiC refractory material comprises the following raw materials: 60-97 wt% of silicon carbide, 2-25 wt% of metal aluminum powder, 1-15 wt% of carbon black, and 3-5 wt% of phenolic resin as a binding agent. The preparation method comprises the following steps: burdening and uniformly mixing the raw materials and the binding agent, carrying out mechanical pressing, and drying at 220-300 DEG C for 12-48 hours to obtain the unfired Al-SiC refractory material. In order to solve the problems that in the prior art, Si3N4 in a Si3N4-SiC refractory material for a blast furnace is invalid in the long-term service process as a binding phase, and the preparation process of the SiC-based refractory material is complicated, Al is innovatively introduced into a SiC matrix, and the high-temperature activity of Al is utilized; the AlN can react with the main atmosphere (N2 (g) + CO (g)) in the blast furnace in the service process to be further converted into high-performance AlN in situ, and the high-performance AlN is subjected to solid solution in a SiC matrix, so that the AlN is stably combined with SiC, and the problems of green preparation of the refractory material and long service life of the SiC-based refractory material for the blast furnace are solved.
本发明属于耐火材料领域，尤其涉及一种高炉用不烧Al‑SiC耐火材料及其制备方法。所述Al‑SiC耐火材料包括如下原料组成：60～97wt％的碳化硅，2～25wt％的金属铝粉，1～15wt％的碳黑，外加3～5wt％的酚醛树脂作为结合剂。将上述原料与结合剂经配料并均匀混合后，机压成型并于220℃～300℃干燥12h～48h，制得不烧Al‑SiC耐火材料。本发明针对现有技术中高炉用Si3N4‑SiC耐火材料中Si3N4作为结合相在长期服役过程中失效以及SiC基耐火材料制备工艺复杂化的问题，创新性地将Al引入到SiC基体，利用Al的高温活性，能够在其服役过程中与高炉中主要气氛(N2(g)+CO(g))反应进一步原位转化为高性能的AlN并固溶到SiC基体中，使其与SiC稳定结合，以解决耐火材料制备绿色化以及高炉用SiC基耐火材料长寿化的问题。
Unfired Al-SiC refractory material for blast furnace and preparation method thereof
一种高炉用不烧Al-SiC耐火材料及其制备方法
LI YONG (author) / HAN GI-SEOK (author) / LI HONGXIA (author) / MA CHENHONG (author)
2024-01-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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