A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Chromium-free magnesium aluminate spinel unburned brick for RH refining furnace and preparation method of chromium-free magnesium aluminate spinel unburned brick
The invention discloses a chromium-free magnesium aluminate spinel unburned brick for an RH refining furnace and a preparation method of the chromium-free magnesium aluminate spinel unburned brick, and belongs to the technical field of metallurgy and refractory materials. The chromium-free magnesium aluminate spinel unburned brick is prepared from 20-25 parts of 98 common fused magnesite with the particle size of 3-5 mm, 25-35 parts of 98 common fused magnesite with the particle size of 1-3 mm, 20-25 parts of 98 common fused magnesite with the particle size of 0-1 mm, 2-10 parts of 98 common fused magnesite with the particle size of less than or equal to 0.074 mm, 8-12 parts of sintered aluminum magnesium spinel with the particle size of less than or equal to 0.074 mm, 5-8 parts of a yttrium oxide stabilized hafnium oxide ceramic bond and 2-3 parts of a binding agent through the steps of mulling, mechanical pressing, drying and the like. According to the chromium-free magnesium aluminate spinel unfired brick, the addition of metal aluminum powder is avoided, the volume expansion cannot be generated in the use process, and the yttrium oxide-stabilized hafnium oxide ceramic bond forms a hafnium oxide-yttrium oxide ceramic structure in the use process, so that a developed organization structure is formed in the chromium-free magnesium aluminate spinel unfired brick, and a compact sintered body is obtained. Therefore, the prepared chromium-free magnesium aluminate spinel unburned brick has excellent slag corrosion resistance, thermal shock resistance and high temperature resistance.
本发明公开了一种RH精炼炉用无铬镁铝尖晶石不烧砖及其制备方法，属于冶金和耐火材料技术领域。所述无铬镁铝尖晶石不烧砖由粒度3～5mm98普通电熔镁砂20～25份、粒度1～3mm98普通电熔镁砂25～35份、粒度0～1mm98普通电熔镁砂20～25份、粒度≤0.074mm98普通电熔镁砂2～10份、粒度≤0.074mm烧结铝镁尖晶石8～12份、氧化钇稳定氧化铪陶瓷结合剂5～8份、结合剂2～3份，通过混练、机压成型、干燥等步骤制成。本发明避免了金属铝粉的加入，使用中不会产生体积膨胀，且氧化钇稳定氧化铪陶瓷结合剂在使用中形成氧化铪‑氧化钇陶瓷结构，使得无铬镁铝尖晶石不烧砖内部形成发达的组织结构，获得致密的烧结体。因此所制备的无铬镁铝尖晶石不烧砖具有优异的耐熔渣侵蚀性能、抗热震性能和高温性能。
Chromium-free magnesium aluminate spinel unburned brick for RH refining furnace and preparation method of chromium-free magnesium aluminate spinel unburned brick
The invention discloses a chromium-free magnesium aluminate spinel unburned brick for an RH refining furnace and a preparation method of the chromium-free magnesium aluminate spinel unburned brick, and belongs to the technical field of metallurgy and refractory materials. The chromium-free magnesium aluminate spinel unburned brick is prepared from 20-25 parts of 98 common fused magnesite with the particle size of 3-5 mm, 25-35 parts of 98 common fused magnesite with the particle size of 1-3 mm, 20-25 parts of 98 common fused magnesite with the particle size of 0-1 mm, 2-10 parts of 98 common fused magnesite with the particle size of less than or equal to 0.074 mm, 8-12 parts of sintered aluminum magnesium spinel with the particle size of less than or equal to 0.074 mm, 5-8 parts of a yttrium oxide stabilized hafnium oxide ceramic bond and 2-3 parts of a binding agent through the steps of mulling, mechanical pressing, drying and the like. According to the chromium-free magnesium aluminate spinel unfired brick, the addition of metal aluminum powder is avoided, the volume expansion cannot be generated in the use process, and the yttrium oxide-stabilized hafnium oxide ceramic bond forms a hafnium oxide-yttrium oxide ceramic structure in the use process, so that a developed organization structure is formed in the chromium-free magnesium aluminate spinel unfired brick, and a compact sintered body is obtained. Therefore, the prepared chromium-free magnesium aluminate spinel unburned brick has excellent slag corrosion resistance, thermal shock resistance and high temperature resistance.
本发明公开了一种RH精炼炉用无铬镁铝尖晶石不烧砖及其制备方法，属于冶金和耐火材料技术领域。所述无铬镁铝尖晶石不烧砖由粒度3～5mm98普通电熔镁砂20～25份、粒度1～3mm98普通电熔镁砂25～35份、粒度0～1mm98普通电熔镁砂20～25份、粒度≤0.074mm98普通电熔镁砂2～10份、粒度≤0.074mm烧结铝镁尖晶石8～12份、氧化钇稳定氧化铪陶瓷结合剂5～8份、结合剂2～3份，通过混练、机压成型、干燥等步骤制成。本发明避免了金属铝粉的加入，使用中不会产生体积膨胀，且氧化钇稳定氧化铪陶瓷结合剂在使用中形成氧化铪‑氧化钇陶瓷结构，使得无铬镁铝尖晶石不烧砖内部形成发达的组织结构，获得致密的烧结体。因此所制备的无铬镁铝尖晶石不烧砖具有优异的耐熔渣侵蚀性能、抗热震性能和高温性能。
Chromium-free magnesium aluminate spinel unburned brick for RH refining furnace and preparation method of chromium-free magnesium aluminate spinel unburned brick
一种RH精炼炉用无铬镁铝尖晶石不烧砖及其制备方法
ZHANG CHUAN (author) / LI YONG (author) / WANG PENG (author) / PANG HONGYUN (author) / KUREHI (author) / LIU CONG (author) / LI BING (author)
2023-08-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2023
| European Patent Office | 2020
| European Patent Office | 2020
| European Patent Office | 2024
| European Patent Office | 2022