This article discusses computer modelling of the flotation process taking into account the hydrodynamic structure of interacting flows. Modern technologies and processes ensure the effective separation of potash ores into individual components, allowing you to obtain the desired product in its pure form. An important aspect is to minimize the loss of useful substances in order to maximize its use in the production of fertilizers. This is achieved through strict control over each stage of raw material processing, optimization of chemical reagents and improvement of separation systems. Various options have been studied and the possibility of using differential equations of material balances has been shown. This made it possible to justify a multi-stage method for identifying a flotation object. The results obtained made it possible to develop acceptable computer models of the dynamics of the flotation process. Methods for modelling the facility and control systems for flotation complexes have been developed based on computer models of the process occurring in the gas and liquid phases.