Abstract
In the context of dry centrifugal granulation technology, a detailed understanding of the crystallization characteristics of BF slag particles is of great importance for addressing two contradictory problems regarding high-valued slag particles and high-grade thermal energy. Considering the non-negligible interactions between multiple particles, the present study simulated a solidification process with phase evolution of blast furnace slag particles in order to describe its crystallization characteristics in a two-particle/four-particle system. Enthalpy method was coupled with self-programming in consideration of the variable physical properties of BF slag and the temperature range of crystal and vitreous phase generation. The evolution of local temperature, cooling rate contour and crystal distribution were obtained, as were final particle quality, crystallization end time and proportion of radiant heat flux. As a result, the mutual heating interaction and the blockage effect caused an increase of 12.5 times and 38.2 times in final crystal phase content of the two particles, and a 42.1% and 65.4% extension of the crystallization process, respectively. In addition, the interaction between multiple particles was discussed by analyzing the effects of the front and behind particle diameters, distance and relative position on crystallization characteristics.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call