Numerical Simulation And Experimental Study Of Blast Furnace Slag's Dry Granulation

Steel industry blast furnace slag for the effective recovery of the sensible heat required to change the granulation process, namely dry granulation alternative to traditional water-granulation processes. So far, however, due to the immaturity of domestic and foreign dry granulation method and technology, and did not realize industrialization. Therefore, the study of new dry granulation method technology to attain industrialization is the steel industry to achieve energy-saving emission reduction requirements must. According to the basic idea of conventional dry granulation process, the research team developed a new type of dry granulated blast furnace slag granulation means having a good effect, but there are still some issues that need improvement, which is also the main content.To reduce experimental cost and feasibility analysis for subsequent research, experiment, numerical simulation of fluid mechanics research methods. FLUENT software using granulated blast furnace slag cooling means physical simulation and parameter optimization, including(1) a high slag granulation process cooling experiments are simulated, and select the simulation to validate the correctness of the model;(2) quantity of inlet vane type granulation equipment on the internal gas flow field;(3) research into the number of the outlet, the inlet velocity impact of granulated blast furnace slag cooling process.Studies have shown that: results and blast furnace slag dry granulation test results, and that is the choice of physical models, solver and the definition of the boundary conditions are correct. Without the addition of blast furnace slag condition, bar blade means more uniform than the segment-type blade means internal velocity flow field, and therefore more suitable for bar blade new blast furnace slag dry granulation unit; inlet inside the device so that an increased number of flow rate field becomes uniform, stable, and more suitable for the new blast furnace slag dry granulation apparatus. After addition of blast furnace slag, the same numerical simulation and experimental results, blast furnace slag have been three steps granulated blast furnace slag that is the first to drop the blade, then under the action of shear blade dispersed and knocking on the wall, then dropped to the bottom of the device. By analyzing the internal temperature of the flow field change map proved the group of blast furnace slag dry granulation equipment has good graining effect, but it needs to improve the cooling effect. The cooling effect to a certain extent, affected the granulation result, when increasing the intake air quantity is eight, inlet velocity of 2.5 m/s, better cooling equipment, heat accumulation phenomenon at the bottom of the device does not exist, reduced blast furnace slag granulated particle effects, beneficial equipment.Overall, this study by comparing the experimental fluid mechanics and numerical simulation of fluid dynamics and useful conclusions for improving the device provides reliable theoretical basis. Important for industrialized dry granulation method.