高炉风口焦炭的特点及分析

Features of and analysis on the coke at the air inlet of blast furnace

对沙钢2 500m^3高炉进行风口焦炭取样,测定风口焦炭灰分、粒度、光学组织、石墨化程度、反应性以及最大承受压力,对比分析风口焦炭与入炉焦炭的质量变化。研究表明,风口焦炭的粒度降低,反应性提高,石墨化程度增加,焦炭表层组织侵蚀较重,反应层厚较薄,抗压强度不变,焦炭表层耐磨强度降低,易发生粉化。

Coke sample was taken from the air inlet of the 2 500 m^3 blast furnace in Shagang. The ash content,grain size,optical texture,degree of graphitization,reactivity and maximum bearing pressure were determined. The quality of the coke at the air inlet and the coke charge was compared. The study shows that the smaller the grain size of coke at air inlet,the higher the reactivity and degree of graphitization,the abrasion of the surface texture of the coke at the air inlet is more serious,the reaction layer is thinner,the compression strength doesn＇t change,surface abrasion resistance is lower and the surface is easily pulverized.