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A platform for research: civil engineering, architecture and urbanism
Preparation method of denitrified fly ash externally doped with denitration by-product
The invention a preparation method of denitrified fly ash externally doped with a denitration by-product. The preparation method comprises the following steps: step 1, crushing and grinding the denitration by-product by using a grinding mill, filling a sealing bag with the crushed and ground denitration by-product, and conducting sealing; step 2, putting fly ash and denitration by-product powder obtained in the step 1 into a stirrer together, and conducting uniform stirring to obtain mixed powder; 3, uniformly spreading the mixed powder obtained in the step 2 into a heating container, sealingthe heating container with a sealing cover, and carrying out heating in a constant-temperature box; and step 4, after the heating in the step 3 is completed, conducting cooling to room temperature ina constant-temperature box, repeating the steps 2 and 3 once or twice to obtain the denitrified fly ash, carrying out uniform stirring, performing sealing and storing a sealed produced in a shady, cool and dry place. The preparation method provided by the invention has no influence on components, morphology, compressive strength and the like of the prepared denitrified fly ash externally doped with the denitration by-product, so when the denitrified fly ash is used as a mineral admixture in cement concrete, the engineering problems of prolonged cement setting time and reduced concrete strengthcannot be caused, and the denitrified fly ash is suitable for wide application.
本发明提供的外掺脱硝副产物的脱硝粉煤灰制备方法，包括如下步骤：步骤1，将脱硝副产物通过磨粉机粉碎磨粉后，装入密封袋内密封；步骤2，将粉煤灰和步骤1的脱硝副产物粉末一起装入搅拌器内搅拌均匀，获得混合粉末；步骤3，将步骤2的混合粉末均匀铺入加热容器内封盖密封后，放入恒温箱内加热；步骤4，步骤3加热完成后，在恒温箱内冷却至室温后，重复1‑2次步骤2、3制得脱硝粉煤灰，最后搅拌均匀后密封存放在阴凉干燥处。本发明制备方法对所制得的外掺脱硝副产物的脱硝粉煤灰的成分、形貌、抗压强度等均无影响，因此其在水泥混凝土中作为矿物掺合料使用时，不会造成水泥凝结时间延长和混凝土强度下降的工程问题，适合广泛应用。
Preparation method of denitrified fly ash externally doped with denitration by-product
The invention a preparation method of denitrified fly ash externally doped with a denitration by-product. The preparation method comprises the following steps: step 1, crushing and grinding the denitration by-product by using a grinding mill, filling a sealing bag with the crushed and ground denitration by-product, and conducting sealing; step 2, putting fly ash and denitration by-product powder obtained in the step 1 into a stirrer together, and conducting uniform stirring to obtain mixed powder; 3, uniformly spreading the mixed powder obtained in the step 2 into a heating container, sealingthe heating container with a sealing cover, and carrying out heating in a constant-temperature box; and step 4, after the heating in the step 3 is completed, conducting cooling to room temperature ina constant-temperature box, repeating the steps 2 and 3 once or twice to obtain the denitrified fly ash, carrying out uniform stirring, performing sealing and storing a sealed produced in a shady, cool and dry place. The preparation method provided by the invention has no influence on components, morphology, compressive strength and the like of the prepared denitrified fly ash externally doped with the denitration by-product, so when the denitrified fly ash is used as a mineral admixture in cement concrete, the engineering problems of prolonged cement setting time and reduced concrete strengthcannot be caused, and the denitrified fly ash is suitable for wide application.
本发明提供的外掺脱硝副产物的脱硝粉煤灰制备方法，包括如下步骤：步骤1，将脱硝副产物通过磨粉机粉碎磨粉后，装入密封袋内密封；步骤2，将粉煤灰和步骤1的脱硝副产物粉末一起装入搅拌器内搅拌均匀，获得混合粉末；步骤3，将步骤2的混合粉末均匀铺入加热容器内封盖密封后，放入恒温箱内加热；步骤4，步骤3加热完成后，在恒温箱内冷却至室温后，重复1‑2次步骤2、3制得脱硝粉煤灰，最后搅拌均匀后密封存放在阴凉干燥处。本发明制备方法对所制得的外掺脱硝副产物的脱硝粉煤灰的成分、形貌、抗压强度等均无影响，因此其在水泥混凝土中作为矿物掺合料使用时，不会造成水泥凝结时间延长和混凝土强度下降的工程问题，适合广泛应用。
Preparation method of denitrified fly ash externally doped with denitration by-product
外掺脱硝副产物的脱硝粉煤灰的制备方法
WU QIAOHUAN (author) / LU SHAN (author) / LUO HAIRONG (author)
2021-02-02
Patent
Electronic Resource
Chinese
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