H_(2)含量对高球比炉料还原行为的影响

Effect of H_(2) content on reduction behavior of burden with high pellet ratio

为了研究H_(2)含量对高炉高球比炉料还原行为的影响,针对首钢京唐公司高球比炉料结构,进行不同H_(2)含量下的还原试验和粉化试验,并与传统高烧比炉料进行对比分析。结果表明,在还原气体中H_(2)体积分数由0%增加至10%的过程中,高球比炉料的失重量、还原度、还原速率和金属化率均提高,球团之间的黏结现象减弱;同时,900℃还原条件下,在还原气体中加入H_(2)会使高球比炉料的粉化现象减弱。可见,与传统高烧比炉料相比,在还原气体中加入H_(2)更能发挥高球比炉料的优势。研究结果可为高炉高球比炉料结构下富氢冶炼提供参考。

In order to study the effect of H_(2) content on reduction behavior of blast furnace burden with high pellet ratio,reduction test and pulverization test under different H_(2) content were carried out for high pellet ratio charge and traditional high sinter ratio charge of Shougang Jingtang Company.The results show that the weight loss,reduction degree,reduction rate and metallization rate of high pellet ratio burden increase with the increase of H_(2) volume fraction from 0%to 10%compared with traditional high sinter ratio burden,and the bonding phenomenon between pellets is weakened.At the same time,under the condition of 900℃reduction,the addition of H_(2) to the reducing gas will weaken the pulverization phenomenon of high pellet ratio burden.Compared with traditional high sinter ratio burden,adding H_(2) into the reducing gas can give more play to the advantages of the high pellet ratio burden.The study can provide reference for hydrogen rich smelting under high pellet ratio burden structure in blast furnaces.