Research On Numerical Simulation And Experiment Of Jet Flotation Column

Jet flotation column is regarded as one of most effective technological innovations, widely used in coal flotation. The history, status quo and the main type of the flotation column are reviewed systematically in this paper, and the trend of development is discussed. A type of the jet aerator with cavity for the flotation column is designed, investigate its capability with flotation column in the laboratory.Flowing fluid in the jet flotation column system is very complicated, measure the parameters in flow field is more difficult. In order to know the flow state in the jet aerators and flotation column, based on reasonable assumptions, use the multiphase flow model in commercial software FLUENT to simulate the mixed state of air and water in two aerators and flotation column. Get distribution of flow state parameters in the jet aerator and flotation column, reveal the working mechanism of air and water mixture inside the jet aerator. The advantage of numerical simulation is that it may predict accurately the distribution of pressure and flow state parameters in the calculating field.and we can have more clear understanding of the parameters distribution about air and water phase. This article also have the simulation result about mixing barrel with water and coal, obtain the distribution of flow state parameters, such as coal concentration and turbulent intensity in the flow field.Part of experiment is investigating the common jet aerator and aerator with cavity. Carry out air charging experiment in water, and discuss the difference between the two different types of jet aerator in the different operating parameters, structural parameters and material parameters. Explore the laws of impacting on gas holdup in flotation column. Research the gas holdup in flotation column using the methods of Rising liquid and Pressure difference. Explore a simple method- injecting absorption method to mensurate gas holdup in the flotation column.Expatiate the theory of in bubble–particle interaction,carry out experiments in the flotation column. Analyse the result of flotation in different parameters.