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Silica brick for hydrogen metallurgy natural gas-based shaft furnace and preparation method of silica brick
The invention relates to a silica brick for a hydrogen metallurgy natural gas-based shaft furnace and a preparation method of the silica brick. According to the technical scheme, 55-75 wt% of silica particles, 16-30 wt% of silica fine powder, 3-7 wt% of silica powder, 2-6 wt% of lime milk and 1-6 wt% of yttrium oxide serve as raw materials and are mixed, sulfurous acid paper pulp waste liquid accounting for 1-5 wt% of the raw materials is added, and mixing, compression molding and drying are conducted; and putting the mixture into a high-temperature furnace, heating to 1350-1450 DEG C at the speed of 15-45 DEG C/h, and preserving heat for 7-12 hours to obtain the silica brick for the hydrogen metallurgy natural gas-based shaft furnace. The prepared silica brick for the hydrogen metallurgy natural gas-based shaft furnace has the characteristics of high softening point under load, high strength, strong H2-H2O gas corrosion resistance and long service life, and is suitable for manufacturing iron in the hydrogen metallurgy natural gas-based shaft furnace by taking H2 or H2 + CO mixed gas as a reducing agent.
本发明涉及一种氢冶金天然气基竖炉用硅砖及其制备方法。其技术方案是：以55～75wt％的硅石颗粒、16～30wt％的硅石细粉、3～7wt％的硅微粉、2～6wt％的石灰乳和1～6wt％的氧化钇为原料，混合，再外加所述原料1～5wt％的亚硫酸纸浆废液，混炼，压制成型，烘干；然后置于高温炉中，以15～45℃/h的速率升温至1350～1450℃，保温7～12h，制得氢冶金天然气基竖炉用硅砖。本发明制备的氢冶金天然气基竖炉用硅砖具有荷重软化点高、强度大、抗H2‑H2O气体腐蚀性能强和使用寿命长的特点，适用于采用H2或H2+CO混合气为还原剂的氢冶金天然气基竖炉制铁。
Silica brick for hydrogen metallurgy natural gas-based shaft furnace and preparation method of silica brick
The invention relates to a silica brick for a hydrogen metallurgy natural gas-based shaft furnace and a preparation method of the silica brick. According to the technical scheme, 55-75 wt% of silica particles, 16-30 wt% of silica fine powder, 3-7 wt% of silica powder, 2-6 wt% of lime milk and 1-6 wt% of yttrium oxide serve as raw materials and are mixed, sulfurous acid paper pulp waste liquid accounting for 1-5 wt% of the raw materials is added, and mixing, compression molding and drying are conducted; and putting the mixture into a high-temperature furnace, heating to 1350-1450 DEG C at the speed of 15-45 DEG C/h, and preserving heat for 7-12 hours to obtain the silica brick for the hydrogen metallurgy natural gas-based shaft furnace. The prepared silica brick for the hydrogen metallurgy natural gas-based shaft furnace has the characteristics of high softening point under load, high strength, strong H2-H2O gas corrosion resistance and long service life, and is suitable for manufacturing iron in the hydrogen metallurgy natural gas-based shaft furnace by taking H2 or H2 + CO mixed gas as a reducing agent.
本发明涉及一种氢冶金天然气基竖炉用硅砖及其制备方法。其技术方案是：以55～75wt％的硅石颗粒、16～30wt％的硅石细粉、3～7wt％的硅微粉、2～6wt％的石灰乳和1～6wt％的氧化钇为原料，混合，再外加所述原料1～5wt％的亚硫酸纸浆废液，混炼，压制成型，烘干；然后置于高温炉中，以15～45℃/h的速率升温至1350～1450℃，保温7～12h，制得氢冶金天然气基竖炉用硅砖。本发明制备的氢冶金天然气基竖炉用硅砖具有荷重软化点高、强度大、抗H2‑H2O气体腐蚀性能强和使用寿命长的特点，适用于采用H2或H2+CO混合气为还原剂的氢冶金天然气基竖炉制铁。
Silica brick for hydrogen metallurgy natural gas-based shaft furnace and preparation method of silica brick
一种氢冶金天然气基竖炉用硅砖及其制备方法
GU HUAZHI (author) / CHEN DING (author) / HUANG AO (author) / ZHANG MEIJIE (author) / LI SHAOFEI (author)
2022-07-15
Patent
Electronic Resource
Chinese
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