Physical Simulation of Bubble Behaviors and Optimization of Converting Phosphogypsum into Ammonium Sulfate

With the rapid development of the phosphorus chemical industry, the accumulation of by-product phosphogypsum has increased year by year. The comprehensive utilization of phosphogypsum has received extensive attention. In this paper, physical simulation is used to investigate the effects of the shape of agitator, stirring speed, inlet gas flow, eccentric stirring (the ratio of the distance from the center of the agitator to the radius of the cylinder), and height of agitator (the distance between the agitator and the bottom of the reactor) on the bubble size distribution. The optimized conditions are: the agitator is SSB-D, and the stirring speed is 600 r/min, inlet gas flow is 0.12 m3/h, eccentric stirring is 0.4, and the height of agitator is 3 cm, the size of the bubbles is distributed between 0.5 and 3 mm. Under this condition, the conversion rate of phosphogypsum can reach 91.95%. The experiment has certain guiding significance for the resource utilization of phosphogypsum.