How to optimize rotary jet degassing process for degassing units part A

The rotary jet degassing process of the online degassing units is currently a commonly used method for purifying aluminum melt in the world, and it is one of the basic guarantee measures for the production of high-quality aluminum castings. However, due to the high temperature and opacity of aluminum melt, it is very difficult to directly study the bubble-aluminum melt two-phase flow field in the process of rotary jet degassing, and the mutual influence of various parameters is not clear.

Computational Fluid Dynamics (CFD), which has gradually developed in recent years, provides a possibility to solve the above problems. It has been reported in the literature that CFD technology is used for the study of the gas-liquid two-phase flow field in stirring equipment with rotating parts, but due to the differences in the type of tank, the structure of rotating parts, and the way of gas introduction, these conclusions cannot be directly analogized rotating parts. In the spray degassing units. However, there are few literatures on the numerical simulation of the rotary jet degassing process. The literature adopts the mixture model, which cannot fully consider the coupling effect between gas and liquid, and the research content is mainly based on the cylindrical degassing unit which has little guiding significance for practical application.

Based on this, this paper takes the rotary jet degassing system actually used in a domestic aluminum plant as the research object, uses the CFD method to simulate the gas-liquid two-phase flow field in the process of rotary jet degassing, and investigates the flow field and gas distribution of different factors. The detailed flow information and flow field characteristics of the gas-liquid two-phase flow field were analyzed to provide basic information for further optimization of the rotary jet degassing process.