Effects of Rare Earth Elements on Performances of Refining Slag
The effects of refining slag on cleanliness of liquid steel are very important. Its main functions are impro-ving the deoxidizing capacity of deoxidizing elements,absorbing nonmetallic inclusions in steel and preventing secondary oxidation of liquid steel to generate FeO,MnO and SiO2 . In the process of refining liquid steel,the reasonable composition of refining slag plays a role of adsorbing and removing inclusions in steel. In the process of smelting rare earth steel,rare earth oxides and rare earth sulfides are formed due to rare earth is easy to react with oxygen and sulfur elements in steel as well as rare earth elements could enter refining slag because of the function of potential energy of high oxygen and sulfur for refining slag. In the production process of steelmaking,the contents of each component in ternary refining slag CaO-SiO2-Al2O3 are different and the effects of rare earth on physical properties of refining slag are different because of different deoxidation systems. In the paper,such physical properties of rare earth refining slag when smelting rare earth steel as melting point,viscosity and alkalinity are analyzed by means of testing to predict the physical properties of refining slag,which could provide theoretical basis for improving the level of slag formation,cleanliness of smelting steel grade and yield of rare earth.
万方数据
维普
