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Steel ladle air brick for ultra-low carbon IF steel smelting and preparation method of steel ladle air brick
The invention relates to a steel ladle air brick for ultra-low carbon IF steel smelting and a preparation method thereof, the steel ladle air brick comprises a matrix and an aggregate, 0-4 parts by weight of aggregate pre-synthesized (Al, Cr) 2O3 micro powder (excluding 0), and the particle size is less than 44 [mu] m; the matrix comprises the following components in parts by weight: 60-70 parts of tabular corundum particles, 15-35 parts of tabular corundum particles with the particle size of 3-5mm, 1-3mm and less than or equal to 1mm, 40-55 parts of 10-30 parts of fused magnesia-alumina spinel particles with the particle size of less than or equal to 1mm, 8-15 parts of tabular corundum fine powder with the particle size of less than or equal to 1mm, 8-10 parts of fused magnesia-alumina spinel fine powder with the particle size of less than 75 mu m, 5-7 parts of active alpha-Al2O3 micro powder with the particle size of less than 75 mu m and D50 of 1-1.5 mu m, and 2-4 parts of calcium aluminate cement Secar71 serving as a binding agent with the D50 of 11-14 mu m; the pre-synthesized (Al, Cr) 2O3 micro powder is prepared from the following raw materials in parts by weight: 45 to 55 parts of nano eta-Al2O3, 45 to 55 parts of Cr2O3 chrome green with the particle size of 55 to 63 nm and 3 to 5 parts of binder; by adding the pre-synthesized micro powder into the corundum spinel matrix, thermal shock resistance, slag resistance, breaking strength, compression strength and residual strength are improved, and erosion and permeability indexes are reduced.
本发明涉及一种超低碳IF钢冶炼用钢包透气砖及其制备方法，包括基质和骨料，骨料预合成(Al,Cr)2O3微粉，0～4重量份，不包括0，粒度＜44μm；基质成分及重量份，板状刚玉颗粒60～70份，3～5mm、1～3mm、≤1mm粒度重量配比15～35：40～55：10～30，电熔镁铝尖晶石颗粒0.6～2份，粒度≤1mm，板状刚玉细粉8～15份，粒度＜75μm，电熔镁铝尖晶石细粉8～10份，粒度＜75μm，活性α‑Al2O3微粉5～7份，D50＝1～1.5μm，结合剂为铝酸钙水泥Secar71：2～4份，D50＝11～14μm；预合成(Al,Cr)2O3微粉原料及重量份为，纳米η‑Al2O3：45～55份，55～63nm，Cr2O3铬绿45～55份，＜44μm，粘结剂3～5份；通过向刚玉尖晶石基质中加入预合成微粉，提升了抗热震、抗渣性、抗折强度、耐压强度、残余强度，降低了侵蚀和渗透指数。
Steel ladle air brick for ultra-low carbon IF steel smelting and preparation method of steel ladle air brick
The invention relates to a steel ladle air brick for ultra-low carbon IF steel smelting and a preparation method thereof, the steel ladle air brick comprises a matrix and an aggregate, 0-4 parts by weight of aggregate pre-synthesized (Al, Cr) 2O3 micro powder (excluding 0), and the particle size is less than 44 [mu] m; the matrix comprises the following components in parts by weight: 60-70 parts of tabular corundum particles, 15-35 parts of tabular corundum particles with the particle size of 3-5mm, 1-3mm and less than or equal to 1mm, 40-55 parts of 10-30 parts of fused magnesia-alumina spinel particles with the particle size of less than or equal to 1mm, 8-15 parts of tabular corundum fine powder with the particle size of less than or equal to 1mm, 8-10 parts of fused magnesia-alumina spinel fine powder with the particle size of less than 75 mu m, 5-7 parts of active alpha-Al2O3 micro powder with the particle size of less than 75 mu m and D50 of 1-1.5 mu m, and 2-4 parts of calcium aluminate cement Secar71 serving as a binding agent with the D50 of 11-14 mu m; the pre-synthesized (Al, Cr) 2O3 micro powder is prepared from the following raw materials in parts by weight: 45 to 55 parts of nano eta-Al2O3, 45 to 55 parts of Cr2O3 chrome green with the particle size of 55 to 63 nm and 3 to 5 parts of binder; by adding the pre-synthesized micro powder into the corundum spinel matrix, thermal shock resistance, slag resistance, breaking strength, compression strength and residual strength are improved, and erosion and permeability indexes are reduced.
本发明涉及一种超低碳IF钢冶炼用钢包透气砖及其制备方法，包括基质和骨料，骨料预合成(Al,Cr)2O3微粉，0～4重量份，不包括0，粒度＜44μm；基质成分及重量份，板状刚玉颗粒60～70份，3～5mm、1～3mm、≤1mm粒度重量配比15～35：40～55：10～30，电熔镁铝尖晶石颗粒0.6～2份，粒度≤1mm，板状刚玉细粉8～15份，粒度＜75μm，电熔镁铝尖晶石细粉8～10份，粒度＜75μm，活性α‑Al2O3微粉5～7份，D50＝1～1.5μm，结合剂为铝酸钙水泥Secar71：2～4份，D50＝11～14μm；预合成(Al,Cr)2O3微粉原料及重量份为，纳米η‑Al2O3：45～55份，55～63nm，Cr2O3铬绿45～55份，＜44μm，粘结剂3～5份；通过向刚玉尖晶石基质中加入预合成微粉，提升了抗热震、抗渣性、抗折强度、耐压强度、残余强度，降低了侵蚀和渗透指数。
Steel ladle air brick for ultra-low carbon IF steel smelting and preparation method of steel ladle air brick
一种超低碳IF钢冶炼用钢包透气砖及其制备方法
KIM CHUL (author) / HUANG YUPING (author) / LI DEJUN (author) / YANG GUANG (author)
2024-07-12
Patent
Electronic Resource
Chinese
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