ABSTRACT

The cohesive zone is the location where the pressure drop is the largest within the blast furnace. Researchers usually adopt the way of increasing the permeability of the softening-melting ore layer to achieve the purpose of improving the permeability of the cohesive zone. In this study, we proposed the concept of the degree of burden mixing (DBM). Through experiments and thermodynamic calculations found that the increase in DBM enhanced the interaction between sinter and pellet, made the burden produce a liquid phase in the cohesive zone, and deteriorated permeability. In addition, the amount of liquid phase in the cohesive zone determined the permeability of the cohesive zone. Therefore, suppressing the interaction between burdens can be considered as one of the effective ways to improve the permeability of the cohesive zone. It is worth noting that the regulation of the DBM can achieve the purpose of suppressing the interaction.

摘要

内聚区是高炉内压降最大的位置。研究人员通常采用增加软熔矿层渗透率的方式来达到提高粘性带渗透率的目的。在这项研究中，我们提出了负担混合程度（DBM）的概念。通过实验和热力学计算发现，DBM的增加增强了烧结矿与球团之间的相互作用，使炉料在凝聚区产生液相，降低了渗透率。此外，粘性区的液相量决定了粘性区的渗透率。因此，抑制载荷间的相互作用可被认为是提高凝聚层渗透率的有效途径之一。