The Research of Macrodynamics for the Phosphate Rock Decomposition with Nitric Acid

Under the condition that the reaction temperature is 30 ℃ to 60 ℃,the primary ω(HNO 3) is 30% to 54%,the primary particle size of the phosphate rock powder is 0.1 875 to 0.5 375 mm in the batch reactor and the speed of revolution of the agitator is 400 r/min,it studies the mechanism of the reaction procedure of the phosphate rock decomposition with nitric acid and the macrodynamics.The experiment result improves that the decomposition rate of the phosphate rock and conversion rate are increased with the increment of the agitation strength,reaction temperature,the nitric acid concentration and the fineness of the phosphate rock powder.The diffused mass transfer of hydrogen ion through the liquid membrane is the rate control procedure of the process.It regresses the experiment data of each influencing factor with the reduced core model of the solid particle to obtain the macrodynamics model of the phosphate rock decomposition with nitric acid.