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Low-potassium molybdenum products have a wide range of applications in electronics, medical and other fields, and ammonia leaching has a very important impact on the production of low-potassium molybdenum products. In order to better control the amount of potassium released in the ammonia leaching process to reduce the pressure of potassium reduction in the subsequent process, this paper analyzed the potassium release law and gave its kinetic model and control method by conducting a one-factor simulation experiment on the influencing factors of potassium release in the ammonia leaching process of molybdenum bakery sand. The results show that the temperature, solid-liquid ratio and molybdenum roasting sand grain size have great influence on the release of potassium, and the optimal conditions for ammonia leaching are: temperature 30 ℃, solid-liquid ratio 1:3, molybdenum roasting sand grain size ranging from 150~178 μm, and ammonia concentration of 20%. In addition, Ca element is more favorable for potassium removal in the ammonia leaching process, while Na element is not favorable for potassium removal in the ammonia leaching process. After slaked lime has a certain effect on potassium removal in water leaching, the effect of sodium carbonate on potassium removal in water leaching is not obvious, so the addition of slaked lime in molybdenum roasted sand water leaching process is favorable to the production of low-potassium ammonium molybdate. Molybdenum roasted sand ammonia leaching process in the early stage of potassium release speed is faster, and the late stage of the speed becomes slower, the Avrami equation can be obtained to better simulate the process of potassium release in the early stage and late stage of ammonia leaching, and the kinetic equation of the ammonia leaching process was determined. [ABSTRACT FROM AUTHOR]