中文摘要：

钢铁工业CO2排放量约占全球总排放量的8％，为了降低CO2排放量，发展以H2为还原剂的炼铁生产方式势在必行。针对富氢还原对烧结矿还原性及还原粉化的影响进行了试验研究和理论分析。研究结果表明：H2等量代替CO时，H2体积分数由0％增加到12％，烧结矿的RDI-3.15降低约1％～2％；H2等量增加，CO，CO2，N2含量等比例降低时，H2体积分数由0％增加到12％，烧结矿的RDI-3.15升高约1．5％～2．5％；H2体积分数从0％增加到12％，烧结矿还原度Ri由72．56％增加到94．97％。研究结果对于开发富氢还原工艺具有重要的理论参考价值。

英文摘要：

Iron and steel industry is one of the largest CO2 source among industrial processes, accounting for about 8% of global total CO, emission. Hydrogen-enriched reduction in blast furnace is an innovative technology to re sponding 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 He content increases from 0% to 12 %, the reduction disintegration index （RDI -3.15 ） of sinter decreases about 1%- 2%. Case 2： when He content increases, the other gases, e. g. CO, CO2 and N2, decrease proportionally. RDI a la increases about 1.5 %-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.