A dynamic model for level prediction in aerated tanks

摘要: Abstract Stirred aerated tanks are a key unit operation in many industries, including froth flotation. Reliable and robust level control is of great importance maintaining steady for successful implementation higher optimising strategies, particularly when such arranged series. When changes made to the rate aeration, there corresponding change pulp bubble size gas holdup (the volume fraction air tank), consequently height. Stable flotation must, therefore, include effect on height systems, especially if being actively controlled. In this paper, model developed from first principles link with variation under dynamic conditions, accounting variability that results differences compressibility. This validated experimentally. order test model, experiments were carried out using 70 L laboratory tank comprising water reagent systems. For both simple complex rate, showed good agreement experimental predicting at state. Under system exhibited slightly slower response than predicted by model; likely be due well mixed assumption not adequately met. provides method improve operating stability through better modelling result flowrate. tanks, will enable greater over height, which has been found affect significantly mass pull, performance.