Mixing Behavior in a Side-Blown Vortex Smelting Reduction Reactor

Abstract

The side-blown vortex smelting reduction reactor proposed in this paper is a new type of metal extraction equipment. The study of fluid dynamics is significant for improving reactor performance. Physical simulation is used to analyze the effects of the angle and number of blown lances, nozzle diameter, gas flow rate, and measuring depths on the reactor's transfer and mixing characteristics. Dimensional analysis is used to correlate dimensionless numbers (Reynolds number Re, modified Froude number Fr¢, capillary number Ca, number of blown lances n, and horizontal angle of the blown lance a) with mixing time and multiphase flow behavior. The results show that when the nozzle diameter and the number of blown lances are constant, Fr¢, Ca and a are negatively correlated with the mixing time, and Re is positively correlated with the mixing time. When the angle of the blown lance is constant, Re and Ca are negatively correlated with mixing time, and Fr¢ is positively correlated with mixing time. With the increase of Re, Fr¢, Ca, the mixing behavior will gradually change from the bubbling regime to the transition regime and then to the steady jetting regime.

Research on Mixing Behavior in a Combined Top–Bottom–Side Blown Iron Bath Gasifier

“…The side lance is offset by a certain angle in the horizontal direction, which will drive the oil layer to generate a rotating flow field and promote the transfer of material and energy in the molten pool. In the range from 15° to 45°, as the horizontal angle of the side lance increases, the mixing time is significantly reduced, which is consistent with the trend obtained by Zhu et al [25] at a high flow rate of the side lance. Figure 7 shows the mixing time under different flow rates of bottom blowing.…”

“…The experimental verification shows that the calculated value positively correlates with the experimental value. Zhu et al [25] studied the effects of different parameters on the mass transfer and mixing behavior of the side-blown vortex smelting reduction reactor by physical simulation and obtained the relationship between the dimensionless number and the mixing time by using a dimensional analysis. Zhang et al [26] conducted a dimensional analysis on the mixing time of the top-bottom-side-blown furnace to explore the internal relationship between different factors.…”