- 韓云婷1,2，楊利香1,2，紀 晶1,2
引用本文摘 要：測試了上海市某電廠普通粉煤灰和脫硝粉煤灰燒失量、強度活性指數、化學組成、礦物組成及微觀形貌等測試，研究了脫硝粉煤灰性能及其與普通粉煤灰的差異，模擬分析了高溫煅燒前后高氮含量脫硝粉煤灰基本性能和力學性能變化。研究表明，正常工況下，采用同一煤種的脫硝粉煤灰的需水量比、燒失量、化學組成、礦物組成類型、外觀以及微觀形貌與普通粉煤灰相似；提出脫硝再燃燒，高氮脫硝粉煤灰經高溫煅燒后燒失量、氮含量、三氧化硫含量分別降低38%、98%和53%，28 d抗壓強度提高7.7%。 Abstract: The ordinary fly ash and denitration fly ash are assessed by testing the loss on ignition, strength activity index, chemical composition, mineral composition and microtopography. The difference of performance between denitration fly ash and ordinary fly ash are systematically analyzed. The basic performance and mechanical properties of the high nitrogen denitrification fly ash are analyzed by high temperature calcination. The results show that the appearance, water requirement ratio, chemical composition, mineral composition and microtopography of denitration fly ash are similar with ordinary fly ash of the same kind of coal under the normal conditions. While the fineness, strength activity index, loss on ignition, nitrogen and sulphur trioxide reflected a slight change from the ordinary fly ash. It is proposed that the loss on ignition, nitrogen content and sulfur trioxide content of high nitrogen fly ash decreased by 38%, 98% and 53% respectively after high temperature calcination by denitration and reburning technology, and the pressure strength of 28 d increased by 7.7%.
韓云婷,楊利香,紀晶.脫硝工藝對粉煤灰材性影響與安全利用控制技術研究[J].混凝土與水泥制品,2018(7):95-100. HAN Y T,YANG L X,JI J.Study on Effect of Denitration on Performance of Fly Ash and the Technology of Resource Security Utilization[J].China Concrete and Cement Products,2018(7):95-100.