Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-nitrogen castable for combustion chamber of circulating fluidized bed boiler and preparation method of low-nitrogen castable
The invention relates to the technical field of combustion of circulating fluidized bed boilers, in particular to a low-nitrogen castable for a combustion chamber of a circulating fluidized bed boiler and a preparation method of the low-nitrogen castable. The castable is prepared from the following raw materials in percentage by mass: 10 to 20 weight percent of sintered magnesium aluminate spinel, 5 to 12 weight percent of active alpha-Al2O3 micro powder, 3 to 5 weight percent of binding agent a, 0.1 to 0.4 weight percent of water reducing agent, 4 to 15 weight percent of water, 1 to 5 weight percent of nitrogen reducing compound, 2 to 6 weight percent of aggregate and the balance of fused white corundum, the preparation method comprises the following steps: S1, preparing a main mixture according to a formula; s2, preparing a main castable; s3, preparing a nitrogen reducing compound; s4, preparing a functional castable; s5, pouring construction is conducted; the fused white corundum and the sintered magnesium aluminate spinel are adopted as the raw materials, so that the high-temperature-resistant performance is excellent; the castable has good corrosion resistance through the active alpha-Al2O3 micro powder and the fused white corundum; urea particles wrap a binding agent b and aluminum oxide powder to form sustained release microspheres, so that the castable achieves a continuous nitrogen reduction effect.
本发明涉及循环流化床锅炉燃烧技术领域，具体是涉及一种循环流化床锅炉燃烧室用的低氮浇注料及制备方法，浇注料由以下质量百分比的原料组成：10～20wt％的烧结镁铝尖晶石、5～12wt％的活性α‑Al2O3微粉、3～5wt％的结合剂a、0.1～0.4wt％的减水剂、4～15wt％的水、1～5wt％的降氮复合物以及2～6wt％的骨料、余量的电熔白刚玉；其制备方法为：S1、按配方制备主混合物；S2、制备主浇注料；S3、制备降氮复合物；S4、制备功能浇注料；S5、浇注施工；本发明原料采用电熔白刚玉和烧结镁铝尖晶石作为原料具有优异的耐高温性能；通过活性α‑Al2O3微粉和电熔白刚玉使浇注料具有良好的抗腐蚀性能；通过对尿素颗粒包裹结合剂b和氧化铝粉末形成缓释微球，使浇注料实现持续降氮效果。
Low-nitrogen castable for combustion chamber of circulating fluidized bed boiler and preparation method of low-nitrogen castable
The invention relates to the technical field of combustion of circulating fluidized bed boilers, in particular to a low-nitrogen castable for a combustion chamber of a circulating fluidized bed boiler and a preparation method of the low-nitrogen castable. The castable is prepared from the following raw materials in percentage by mass: 10 to 20 weight percent of sintered magnesium aluminate spinel, 5 to 12 weight percent of active alpha-Al2O3 micro powder, 3 to 5 weight percent of binding agent a, 0.1 to 0.4 weight percent of water reducing agent, 4 to 15 weight percent of water, 1 to 5 weight percent of nitrogen reducing compound, 2 to 6 weight percent of aggregate and the balance of fused white corundum, the preparation method comprises the following steps: S1, preparing a main mixture according to a formula; s2, preparing a main castable; s3, preparing a nitrogen reducing compound; s4, preparing a functional castable; s5, pouring construction is conducted; the fused white corundum and the sintered magnesium aluminate spinel are adopted as the raw materials, so that the high-temperature-resistant performance is excellent; the castable has good corrosion resistance through the active alpha-Al2O3 micro powder and the fused white corundum; urea particles wrap a binding agent b and aluminum oxide powder to form sustained release microspheres, so that the castable achieves a continuous nitrogen reduction effect.
本发明涉及循环流化床锅炉燃烧技术领域，具体是涉及一种循环流化床锅炉燃烧室用的低氮浇注料及制备方法，浇注料由以下质量百分比的原料组成：10～20wt％的烧结镁铝尖晶石、5～12wt％的活性α‑Al2O3微粉、3～5wt％的结合剂a、0.1～0.4wt％的减水剂、4～15wt％的水、1～5wt％的降氮复合物以及2～6wt％的骨料、余量的电熔白刚玉；其制备方法为：S1、按配方制备主混合物；S2、制备主浇注料；S3、制备降氮复合物；S4、制备功能浇注料；S5、浇注施工；本发明原料采用电熔白刚玉和烧结镁铝尖晶石作为原料具有优异的耐高温性能；通过活性α‑Al2O3微粉和电熔白刚玉使浇注料具有良好的抗腐蚀性能；通过对尿素颗粒包裹结合剂b和氧化铝粉末形成缓释微球，使浇注料实现持续降氮效果。
Low-nitrogen castable for combustion chamber of circulating fluidized bed boiler and preparation method of low-nitrogen castable
一种循环流化床锅炉燃烧室用的低氮浇注料及制备方法
LI YEQING (Autor:in) / LI HAO (Autor:in) / QIAN LONGFEI (Autor:in)
13.08.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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