To prevent the explosive accident in the process of fertilizer production

thermal safety of phosphorus-potassium nitrate fertilizer in aqueous solution was studied by using the self-designed devices.The results show that the concentration of ammonium nitrate has a great effect on critical explosion temperature of the phosphorus-potassium nitrate aqueous solution.The higher the concentration of ammonium nitrate is

the lower the critical explosion temperature becomes

the more easily the ammonium nitrate explodes.The chloride ion alone existed inhibits the explosion of phosphorus-potassium nitrate fertilizer in aqueous solution.Nitrate acid and chloride ions existed at the same time accelerate its decomposition reaction and reduce the critical explosion temperature.The results have important guiding significance on the production safety of fertilizer-related enterprises.