A method for smelting high manganese stainless steel by aod and an aod furnace
A technology of stainless steel and high manganese, applied in the field of AOD smelting high manganese stainless steel and AOD furnace, can solve the problems of lowering AOD refining temperature, reducing AOD furnace age, and large amount of alloy addition, so as to reduce the carbon content at the end point and shorten the oxygen blowing time , the effect of reducing the burning loss of chromium
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Embodiment 1
[0049] Embodiment 1: The stainless steel grade smelted in this embodiment is 1Cr22Mn15N.
[0050] The composition of finished steel products is shown in Table 1. (mass fraction, %)
[0051]
[0052] One or more of high-carbon ferrochrome, waste stainless steel, waste ordinary carbon steel, and car scraps are used as raw materials to melt and heat up in an EAF furnace to form molten steel, add 5kg / t of silicon carbide for reduction, add 1.2 tons of lime and Carry out slagging, remove harmful slag, and make the mass fraction of Cr in molten steel higher than 24.0%. When the temperature reaches 1640°C, the molten steel is taken out of the furnace and blended into the AOD furnace.
[0053] The composition of EAF furnace mixed with steel is shown in Table 2. (mass fraction, %)
[0054]
[0055] The mass of molten steel after AOD mixing with steel is 19.2 tons, the temperature is kept above 1580°C, 2.3 tons of lime is added, and then oxygen is blown for decarburization;
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Embodiment 2
[0064] The stainless steel grade smelted in this embodiment is Jk2LB.
[0065] The composition of finished steel products is shown in Table 4. (mass fraction, %)
[0066]
[0067] One or more of high-carbon ferrochrome, waste stainless steel, waste ordinary carbon steel, and car scraps are used as raw materials to melt and heat up in an EAF furnace to form molten steel, add 6kg / t of silicon carbide for reduction, add 1.2 tons of lime and Carry out slagging, remove harmful slag materials, discharge harmful gases, and make the mass fraction of Cr in molten steel higher than 14.0%. When the temperature reaches 1640°C, the molten steel is taken out and blended into the AOD furnace.
[0068] The composition of EAF furnace mixed with steel is shown in Table 5. (mass fraction, %)
[0069]
[0070] The mass of molten steel after AOD mixing with steel is 19.2 tons, the temperature is kept above 1580°C, 2.3 tons of lime is added, and then oxygen is blown for decarburization;
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