[China Aluminum Network] With the rapid development of the steelmaking industry, there are more and more varieties of steelmaking deoxidizers, but whether it is Si-AI-Fe or Al-Si-Ba-Fe, etc., the true melting point, specific gravity, Both the boiling point and the affinity with oxygen are not ideal; the effect of aluminum in the alloy is greatly reduced. The density of aluminum ferromanganese is 5.7 g/cm3, which is far greater than the specific gravity of steel slag, and slightly smaller than the specific gravity of molten steel. As a result, the floatation rate of aluminum ferromanganese is obviously slowed down, and there is very little time to melt the aluminum-manganese-iron, and it is not pushed to the slag like aluminum. The surface of the layer is suspended in the liquid steel. In addition, the presence of aluminum-manganese composite deoxidation reaction forms a manganese-rich zone around the aluminum, which improves the solubility of aluminum and the equivalent aluminum deoxidation ability, and produces a composite deoxidation product with a low melting point, which greatly reduces the content of inclusions in the steel. There is a tendency to reduce nozzle nodules in continuous casting. Therefore, the final deoxidation of aluminum ferromanganese can optimize deoxidation, improve the intrinsic quality of steel, and effectively reduce the deoxidation cost of steelmaking.
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