A Simple Model to Simulate Particle Filtration through Froth Bed
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초록
This study applied a filtration model to simulate the behaviors of a steady froth bed in a flotation process. To validate the model data, an experimental flotation test was conducted considering the factors of froth bed depth and influent hydraulic loading on removal of silica particles. The influent hydraulic load was varied between 1 and 4 m3/h, and the froth bed depths were 10, 18, 27, and 36 cm. All of the effects of these factors on particle removal efficiency could be estimated by the removal efficiency parameters, that is, the sum of the values of the adhesion and the total single collection parameters. As a result, a reduction of froth depth or increase of hydraulic loading condition led to poor removal efficiency, which more effectively reflects the reality than previous models. Using the proposed model, the adhesion efficiency was more favorable for smaller particles, indicating that the proposed model is sensitive to interparticle behavior. In the simulation of the particle distribution of effluent particles, low hydraulic loading conditions produced good compatibility between our model and the experimental values. The proposed model is effective for analyzing macroscopic phenomena in the flotation process. However, further improvements are required to understand particle breakage and flow structure more completely.
Abstract
This study applied a filtration model to simulate the behaviors of a steady froth bed in a flotation process. To validate the model data, an experimental flotation test was conducted considering the factors of froth bed depth and influent hydraulic loading on removal of silica particles. The influent hydraulic load was varied between 1 and 4 m3/h, and the froth bed depths were 10, 18, 27, and 36 cm. All of the effects of these factors on particle removal efficiency could be estimated by the removal efficiency parameters, that is, the sum of the values of the adhesion and the total single collection parameters. As a result, a reduction of froth depth or increase of hydraulic loading condition led to poor removal efficiency, which more effectively reflects the reality than previous models. Using the proposed model, the adhesion efficiency was more favorable for smaller particles, indicating that the proposed model is sensitive to interparticle behavior. In the simulation of the particle distribution of effluent particles, low hydraulic loading conditions produced good compatibility between our model and the experimental values. The proposed model is effective for analyzing macroscopic phenomena in the flotation process. However, further improvements are required to understand particle breakage and flow structure more completely.