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Preparation method of low-thermal-conductivity refractory material for heat recovery coke oven
The invention discloses a preparation method of a low-thermal-conductivity refractory material for a heat recovery coke oven. The preparation method comprises the following steps: fully stirring and mixing coal series kaolinite, alpha-Al2O3, yttrium oxide partially-stabilized zirconium oxide and tetragonal zirconium oxide fibers, deionized water, polyacrylamide and a binder to prepare slurry, then adding ammonia water to adjust the pH value to 9-11, then adding a polyether alcohol ester water-based defoaming agent, and carrying out magnetic stirring and vacuum defoaming treatment, so as to obtain the high-temperature-resistant zirconium oxide composite material. And pouring the treated slurry into a mold, freezing and forming at liquid nitrogen temperature to obtain a green body, treating the green body by a freeze dryer to obtain a green body, and finally performing blast drying on the dried green body and sintering at high temperature to obtain a finished product. The low-thermal-conductivity refractory material for the heat recovery coke oven prepared by the method can be used at the room temperature of 2023K, and has the advantages of low thermal conductivity, high fracture toughness, long service life, high-temperature corrosion resistance, excellent thermal shock resistance and the like; the preparation process is simple, raw materials are rich and cheap, the process is pollution-free, gas emission is green and environment-friendly, and the method is suitable for large-scale industrial production.
本发明公开了一种热回收焦炉低导热耐火材料的制备方法。将煤系高岭土、α‑Al2O3、氧化钇部分稳定氧化锆和四方氧化锆纤维、去离子水、聚丙烯酰胺、粘结剂，充分搅拌混合制成浆料，然后添加氨水调节pH值为9~11，再添加聚醚醇酯水性消泡剂进行磁力搅拌和真空除泡处理，处理后的浆料浇注到模具在液氮温度下冷冻成型得到生坯，生坯经冷冻干燥机处理得到坯体，最后将干燥后的坯体鼓风烘干后高温烧结得到成品。该方法制得的热回收焦炉低导热耐火材料可以在室温～2023K下使用，具有低热导率、高断裂韧性、长服役寿命、耐高温腐蚀、抗热震性能优异等优点；其制备工艺简单、原料丰富低廉、过程无污染、气体排放绿色环保，适于大规模工业化生产。
Preparation method of low-thermal-conductivity refractory material for heat recovery coke oven
The invention discloses a preparation method of a low-thermal-conductivity refractory material for a heat recovery coke oven. The preparation method comprises the following steps: fully stirring and mixing coal series kaolinite, alpha-Al2O3, yttrium oxide partially-stabilized zirconium oxide and tetragonal zirconium oxide fibers, deionized water, polyacrylamide and a binder to prepare slurry, then adding ammonia water to adjust the pH value to 9-11, then adding a polyether alcohol ester water-based defoaming agent, and carrying out magnetic stirring and vacuum defoaming treatment, so as to obtain the high-temperature-resistant zirconium oxide composite material. And pouring the treated slurry into a mold, freezing and forming at liquid nitrogen temperature to obtain a green body, treating the green body by a freeze dryer to obtain a green body, and finally performing blast drying on the dried green body and sintering at high temperature to obtain a finished product. The low-thermal-conductivity refractory material for the heat recovery coke oven prepared by the method can be used at the room temperature of 2023K, and has the advantages of low thermal conductivity, high fracture toughness, long service life, high-temperature corrosion resistance, excellent thermal shock resistance and the like; the preparation process is simple, raw materials are rich and cheap, the process is pollution-free, gas emission is green and environment-friendly, and the method is suitable for large-scale industrial production.
本发明公开了一种热回收焦炉低导热耐火材料的制备方法。将煤系高岭土、α‑Al2O3、氧化钇部分稳定氧化锆和四方氧化锆纤维、去离子水、聚丙烯酰胺、粘结剂，充分搅拌混合制成浆料，然后添加氨水调节pH值为9~11，再添加聚醚醇酯水性消泡剂进行磁力搅拌和真空除泡处理，处理后的浆料浇注到模具在液氮温度下冷冻成型得到生坯，生坯经冷冻干燥机处理得到坯体，最后将干燥后的坯体鼓风烘干后高温烧结得到成品。该方法制得的热回收焦炉低导热耐火材料可以在室温～2023K下使用，具有低热导率、高断裂韧性、长服役寿命、耐高温腐蚀、抗热震性能优异等优点；其制备工艺简单、原料丰富低廉、过程无污染、气体排放绿色环保，适于大规模工业化生产。
Preparation method of low-thermal-conductivity refractory material for heat recovery coke oven
热回收焦炉低导热耐火材料的制备方法
XU GUANGPING (Autor:in) / LIU PENGCHENG (Autor:in) / XU RONG (Autor:in)
16.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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