Low Carbon Ferro Chrome
Refining high-carbon ferrochromium from chrome ore: When refining high-carbon ferrochromium from chrome ore, the refining slag has a larger viscosity and higher melting point, and the smelting process temperature must be higher.
Therefore, the power consumption is high, the furnace lining life is short, and the carbon content is not easy to reduce. Using oxygen to blow high-carbon ferrochrome has great advantages, such as high productivity, low cost, and high recovery rate. At present, the traditional production method is still the silicon thermal method. The electrosilicothermal method uses silicon in the silicon-chromium alloy to reduce the oxides of medium chromium and iron under the conditions of making alkaline slag in the electric furnace, thereby producing medium-low carbon ferrochromium.
High Carbon Ferro Chrome
Oxygen blowing method for refining medium and low carbon ferrochromium: The equipment used for refining medium and low carbon ferrochromium by oxygen blowing method is a converter, so it is called converter method. According to different oxygen supply methods, oxygen blowing can be divided into four types: side blowing, top blowing, bottom blowing and top and bottom blowing. Our country adopts the top-blown converter method. The oxygen blowing method is to blow oxygen directly into liquid high-carbon ferrochromium to decarburize it to produce medium-low carbon ferrochrome. The main elements in high-carbon ferrochrome are chromium, iron, silicon, and carbon, all of which can be oxidized.
Medium Carbon Ferrochrome
The main task of oxidation blowing high carbon ferrochromium is to decarburize and preserve chromium. When oxygen is blown into liquid high-carbon ferrochromium, since the content of chromium and iron accounts for more than 90% of the total alloy, chromium and iron are oxidized first, and then these oxides oxidize the silicon in the alloy. Due to the oxidation of chromium, iron, and silicon, the temperature of the molten pool increases rapidly, and the decarburization reaction develops rapidly. The higher the temperature, the more conducive to the decarburization reaction, and can inhibit the oxidation reaction of chromium, and the lower the carbon in the alloy can be reduced.
