沥青浸润和掺配对不同硫含量煅后焦反应性的影响

Effect of Asphalt Infiltration Baking and Blending on Reactivity of Calcined Coke with Different Sulfur Content

运用SEM对煅后焦颗粒沥青浸润和焙烧后的形貌进行分析,采用不同硫含量煅后焦颗粒(粒径1~1.6mm)与沥青浸润在1 050℃焙烧30min制备出煅后焦,对不同硫含量煅后焦颗粒浸润结焦后和掺配后的CO_2/空气反应性进行测定。结果表明,1~1.6mm煅后焦颗粒最外层被沥青浸润层包裹,外表层部分孔隙被沥青与细粉颗粒填充;不同硫含量煅后焦颗粒被沥青浸润结焦后的CO_2反应残余率明显降低,空气反应性均呈现恶化趋势;不同硫含量煅后焦掺配恶化了煅后焦反应性。

Microstructures of calcined coke after asphalt infiltrating and baking were analyzed.Calcined coke with particle size of 1~1.6 mm is infiltrated with pitch and baked at 1 050 ℃ for 30 min.Reactivity of calcined coke with different sulfur content in CO2 or air was investigated after pitch infiltrating or infiltrating and blending.The results show that outside surface of calcined coke with particle size of 1~1.6 mm is pitch enclosed,and surface portion is filled pitch and fine calcined coke.CO2 reactivity of calcined coke with different sulfur content obviously drops,but reactivity in air presents the same bad tendency.Reactivity of calcined coke blended with different sulfur content is dramaticly deteriorated in CO2 or air.