Oxygen blowing method is to blow oxygen directly into liquid high-carbon ferrochrome to decarburize it to obtain medium-chromium ferrochrome. The main elements in high-carbon ferrochrome are chromium, iron, silicon, and carbon, all of which can be oxidized. The main task of oxidizing and blowing high-carbon ferrochromium is to decarbonize and preserve chromium.
When oxygen is blown into the liquid high-carbon ferrochromium, because the content of chromium and iron accounts for more than 90% of the total alloy, the first thing to oxidize is chromium and iron. Then, these oxides oxidize the silicon in the alloy. Due to the oxidation of chromium, iron and silicon, the temperature of the molten pool rises rapidly, and the decarburization reaction develops rapidly. The higher the temperature, the more favorable the decarburization reaction and the inhibition of the oxidation reaction of chromium. The lower the carbon in the alloy can be.
