The new silicon aluminum barium calcium alloy has strong deoxidation and desulfurization capabilities, which plays an important role in changing the morphology and distribution of inclusions in steel, refining the grain, improving the processing performance of steel, and improving the quality of steel. The use of new silicon aluminum barium calcium alloy is more effective than the use of single alloy such as aluminum block and ferrosilicon, which improves the comprehensive utilization rate, reduces the steelmaking cost, and has better economic benefits.
The solubility of Si, Al, Ba, Ca in molten steel is small, and it can dissolve calcium and reduce calcium vapor pressure. In Si, Al, Ba, Ca alloy, the role of calcium in deoxidation and non-metallic inclusion treatment can be fully improved. Silicon calcium barium aluminum deoxidizer is an auxiliary material for steelmaking. It is suitable for deoxidation in various forms of steelmaking, especially in converter steelmaking. It has strong deoxidation and desulfurization effects, can improve the flow performance of molten steel and solve the problem of nozzle nodulation. The deoxidation of Si Al Ba Ca alloy can make the total oxygen content of steel billet between 9-15 ppm; The inclusions in steel (compared with other deoxidizers) can be reduced by about 75-80%; It can make the distribution of inclusions in the area show a downward trend, which is due to the deoxidization of silicon aluminum barium calcium, and the speed of the aggregation, growth and floating of inclusions is faster than that of aluminum deoxidization; The number of inclusions can reach a lower level quickly; The shape of impurities can be changed, and the spheroidization of inclusions is obvious; It can refine ferrite grains, improve the impact resistance toughness and processing performance of steel, improve the fluidity of molten steel, and prevent nozzle plugging.
