Features of Liquid Steel Flow in the Middle Package
Steelmaking is an important pre-fabrication process of the metallurgy and iron and steel industry. It requires operator knowledge and understanding to complete the melting process and smelting technology. The operator must have a full understanding of the process features of the liquid steel, and optimize the operation process to ensure the quality of the molten steel. The so-called middle package steel is a kind of liquid steel. At present, it is widely used in casting, forging and rolling production, and plays an important role in steelmaking.
The middle package steel refers to the use of medium-frequency voltage to supply energy to the steel ladle, so that the energy of the ladle is increased by the heat capacity of the steel. Therefore, it needs to control the temperature and cleanliness of the steel during the pouring process. The characteristics of liquid middle package steel flow in the pouring process are as follows.
Firstly, the middle package steel has a relatively high viscosity and a large melting range, so the liquid steel has a smaller velocity and a smaller continuous length. At the same time, due to the constantly changing internal structure of the steel, the fluidity of the liquid steel varies with time, resulting in a change in the heat transfer coefficient of the liquid steel.
Secondly, the middle package steel has a large inertia force, and the liquid steel is in the moment of pouring, the inertia force exists under the conditions of vertical and horizontal rotation, so that the flow pattern of the liquid steel is significantly affected. Therefore, regular stirring can ensure uniformity of the steel.
Thirdly, due to the high temperature of middle package steel, the surface tension of the liquid steel is large and it has good adhesion. Therefore, when the steel is poured, the surface tension of the liquid steel will generate a negative pressure on the surface of the liquid steel, causing the liquid steel to rise.
Finally, when the middle package steel is poured, it is in a state of turbulent flow. The turbulent flow of liquid steel makes the velocity of liquid steel in a certain range non-uniform, which has a great influence on the process of steel making. Therefore, when controlling the flow of steel, it is necessary to control the turbulence of steel flow, so as to effectively reduce the influence of turbulence on the quality of molten steel.
In summary, the molten steel in the middle package has certain characteristics, operators should have a comprehensive understanding of the process characteristics of the liquid steel. Therefore, they should constantly optimize the operation process in order to ensure the quality of the molten steel and the efficient operation of the steel making process.
