A model for solid surface viscosity of iron powders at high temperature: Influence of particle size distribution

The stickiness of bed material was highly relevant to agglomeration/defluidization in fluidized-bed reduction of iron ore. In this paper, a quantitative model was developed to associate solid surface viscosity (particle adhesion) of a granular group with particle size distribution (PSD) function. The calculation was focused on the sintering behavior of particles with different sizes. This model explained theoretically the dependence of particle adhesion on PSD parameters and thus can be used as a reference to select the particle composition of bed materials for fluidization reduction of iron ore.