Influence of Burden Softening and Melting Properties on Cohesive Zone Shape and Gas Flow in Blast Furnace

摘要

As cohesive zone plays an important role in determining blast furnace performance and stability, it is essential to predict the cohesive zone shape and evaluate its effects. In present study, a two-dimensional axi-symmetric steady-state model is proposed to evaluate the influence of burden softening and melting properties on cohesive zone shape and gas flow. The results show that as burden softening temperature and melting temperature both increase with keeping temperature range constant, the cohesive zone position is lower and resistance to gas flow is larger. When burden softening and melting temperature range increases, width of cohesive zone increases, making coke slit channel longer, which exerting greater resistance to gas.