Fluent simulation of centrifugal atomization of multi-solid wastes molten slag melted by blast furnace slag, fly ash and waste incineration ash

Abstract Based on finite element numerical simulation method, Fluent software was used to simulate the centrifugal atomization process of multi-solid wastes molten slag melted by blast furnace slag, fly ash and waste incineration ash. The feasibility of the finite element model in simulating centrifugal atomization was verified by comparing the experimental results with the calculated results. The influence of rotating speed, nozzle angle and the inlet velocity of compressed air injected on the slag particle distribution were studied. Results showed that the rotating speed of the turntable should not exceed 1000 rpm, the inlet velocity of compressed air should be about 5 m/s, and the nozzle angle of compressed air should be set between 40 and 60 degrees, which have positive effect on the centrifugal atomization of multi-solid wastes molten slag. The heat recovery efficiency can reach 73.7% under the condition of 800 rpm rotary speed, 5 m/s compressed air inlet velocity, 0.1 m/s flow rate of 1800 K molten slag beam and in 300 K ambient temperature.