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Magnesium-aluminum-manganese spinel brick for cement kiln firing zone and preparation method of magnesium-aluminum-manganese spinel brick
The invention relates to the technical field of heat-resistant materials, and discloses a magnesium-aluminum-manganese spinel brick for a cement kiln firing zone and a preparation method of the magnesium-aluminum-manganese spinel brick, and magnesium-aluminum-manganese spinel is prepared from high-purity magnesia (aggregate and fine powder), microporous magnesium-aluminum spinel (0-3mm), manganese dioxide micro powder and paper pulp waste liquid as binding agents. The sum of the aggregate and the powder is 100 wt%, the aggregate accounts for 60-70 wt%, the mixed fine powder accounts for 40-30 wt%, and the binding agent accounts for 2-4 wt% of the sum of the aggregate and the powder; the aggregate is prepared from 10 to 15 weight percent of high-purity magnesia particles with the particle size of 0 to 1 mm, 15 to 30 weight percent of high-purity magnesia particles with the particle size of 1 to 3 mm, 10 to 15 weight percent of high-purity magnesia particles with the particle size of 3 to 5 mm and 10 to 20 weight percent of microporous magnesium aluminate spinel with the particle size of 1 to 3 mm. By maintaining the high-temperature sintering activity of manganese, the magnesium-aluminum-manganese spinel brick with stable volume is prepared, the fineness and components of manganese dioxide are key, the content of manganese dioxide is 65% or above, and manganese ions can replace part of magnesium ions in a magnesium-aluminum spinel crystal form to form a stable manganese-aluminum spinel structure in the sintering process, so that the sintering stability of the product is ensured.
本发明涉及耐热材料技术领域，且公开了一种水泥窑烧成带用镁铝锰尖晶石砖及其制备方法，所述镁铝锰尖晶石是由高纯镁砂(骨料、细粉)、微孔镁铝尖晶石(0‑3mm)和二氧化锰微粉，纸浆废液为结合剂制成。骨料和粉料之和为100wt％，骨料占60‑70wt％，混合细粉占40‑30wt％，结合剂占骨料、粉料之和的2‑4wt％；所述骨料为：粒度0‑1mm的高纯镁砂颗粒10‑15wt％，粒度1‑3mm的高纯镁砂颗粒15‑30wt％，粒度3‑5mm的高纯镁砂颗粒10‑15wt％，粒度1‑3mm的微孔镁铝尖晶石10‑20wt％。通过保持锰的高温烧结活性，制得体积稳定的镁铝锰尖晶石砖，二氧化锰细度和成分是关键，二氧化锰含量在65％以上，烧结过程中锰离子可在镁铝尖晶石晶型替代部分镁离子形成稳定的锰铝尖晶石结构，从而保证产品的烧结稳定性。
Magnesium-aluminum-manganese spinel brick for cement kiln firing zone and preparation method of magnesium-aluminum-manganese spinel brick
The invention relates to the technical field of heat-resistant materials, and discloses a magnesium-aluminum-manganese spinel brick for a cement kiln firing zone and a preparation method of the magnesium-aluminum-manganese spinel brick, and magnesium-aluminum-manganese spinel is prepared from high-purity magnesia (aggregate and fine powder), microporous magnesium-aluminum spinel (0-3mm), manganese dioxide micro powder and paper pulp waste liquid as binding agents. The sum of the aggregate and the powder is 100 wt%, the aggregate accounts for 60-70 wt%, the mixed fine powder accounts for 40-30 wt%, and the binding agent accounts for 2-4 wt% of the sum of the aggregate and the powder; the aggregate is prepared from 10 to 15 weight percent of high-purity magnesia particles with the particle size of 0 to 1 mm, 15 to 30 weight percent of high-purity magnesia particles with the particle size of 1 to 3 mm, 10 to 15 weight percent of high-purity magnesia particles with the particle size of 3 to 5 mm and 10 to 20 weight percent of microporous magnesium aluminate spinel with the particle size of 1 to 3 mm. By maintaining the high-temperature sintering activity of manganese, the magnesium-aluminum-manganese spinel brick with stable volume is prepared, the fineness and components of manganese dioxide are key, the content of manganese dioxide is 65% or above, and manganese ions can replace part of magnesium ions in a magnesium-aluminum spinel crystal form to form a stable manganese-aluminum spinel structure in the sintering process, so that the sintering stability of the product is ensured.
本发明涉及耐热材料技术领域，且公开了一种水泥窑烧成带用镁铝锰尖晶石砖及其制备方法，所述镁铝锰尖晶石是由高纯镁砂(骨料、细粉)、微孔镁铝尖晶石(0‑3mm)和二氧化锰微粉，纸浆废液为结合剂制成。骨料和粉料之和为100wt％，骨料占60‑70wt％，混合细粉占40‑30wt％，结合剂占骨料、粉料之和的2‑4wt％；所述骨料为：粒度0‑1mm的高纯镁砂颗粒10‑15wt％，粒度1‑3mm的高纯镁砂颗粒15‑30wt％，粒度3‑5mm的高纯镁砂颗粒10‑15wt％，粒度1‑3mm的微孔镁铝尖晶石10‑20wt％。通过保持锰的高温烧结活性，制得体积稳定的镁铝锰尖晶石砖，二氧化锰细度和成分是关键，二氧化锰含量在65％以上，烧结过程中锰离子可在镁铝尖晶石晶型替代部分镁离子形成稳定的锰铝尖晶石结构，从而保证产品的烧结稳定性。
Magnesium-aluminum-manganese spinel brick for cement kiln firing zone and preparation method of magnesium-aluminum-manganese spinel brick
一种水泥窑烧成带用镁铝锰尖晶石砖及其制备方法
HAN BO (author) / LI YUANJIN (author) / WANG XUYUAN (author) / MENG LINGXIAO (author) / HOU DAN (author) / GAO HONGXING (author) / ZHANG YAQUAN (author)
2022-11-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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