Abstract:Iron and steel industry is one of the largest CO2 source among industrial processes, accounting for about 8% of global total CO2 emission. Hydrogen-enriched reduction in blast furnace is an innovative technology to responding to requests for further reduction of CO2 emission and sustainable development on a global scale. The effects of hydrogen-enriched gas on reducibility and reduction-disintegration are investigated in present work. The experimental results show that, Case 1: when H2 content increases, equivalent CO content decreases. When H2 content increases from 0% to 12%, the reduction disintegration index (RDI-3.15) of sinter decreases about 1%-2%. Case 2: when H2 content increases, the other gases, e. g. CO, CO2 and N2, decrease proportionally. RDI-3.15 increases about 15%-2.5% when H2 content increases from 0% to 12%. When H2 content increases from 0% to 12%, the reducibility index (Ri) increases from 72.56% to 94.97%. Therefore, hydrogen-enriched gas will be an important role in improving the raw materials’ metallurgical properties, and eventually in reduction of CO2 emission.
沈峰满,姜鑫,魏国,郑海燕,穆林. 富氢还原对烧结矿还原性及还原粉化的影响[J]. 中国冶金, 2014, 24(1): 2-5.
SHEN Feng-man,JIANG Xin,WEI Guo,ZHENG Hai-yan,MU Lin. Effect of Hydrogen-Enriched Gas on Reducibility and Reduction-Disintegration of Sinters. China Metallurgy, 2014, 24(1): 2-5.