Method for producing 45# large flat steel ingot by electric furnace
A flat steel ingot, large-scale technology, applied in the field of metallurgy, can solve the problems of large difference between liquidus and solidus, low pass rate of steel plate flaw detection, segregation of gas and inclusions, etc., to achieve less inclusions, reduce deoxidizer consumption, The effect of less deoxidizer
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[0024] Example 1
[0025] The method for producing 45# steel 33t*3 large flat steel ingots in this embodiment includes EAF furnace primary smelting furnace ingredients, tapping conditions, tapping material addition control, LF furnace refining, VD furnace vacuum processing, and mold casting temperature control. The specific process steps are as follows:
[0026] (1) Preliminary smelting process of EAF furnace: 102t steel is planned, 105t steel material, 42t molten iron, 0.15% carbon content of steel, 1.5kg / t carbon powder, 2kg / t lime and 8kg / t silicomanganese.
[0027] (2) LF furnace refining process: According to the analysis after tapping, C in steel: 0.28%, first turn on large argon gas, add 1.2kg carbon powder, stir for 2 minutes, add 6kg / t lime and 1.5kg / calcium carbide t, feed the aluminum wire 0.9kg / t for 10 minutes, then continue to power on, add 3kg / t of lime and 0.2kg / t of aluminum particles, sample and analyze, adjust C, Si, Mn elements into the internal control range, w...
Example Embodiment
[0031] Example 2
[0032] The method for producing 45# steel 30t*3 large flat steel ingots in this embodiment includes EAF furnace primary smelting furnace ingredients, tapping conditions, tapping material addition control, LF furnace refining, VD furnace vacuum treatment, and mold casting temperature control. The specific process steps are as follows:
[0033] (1) Preliminary smelting process of EAF furnace: It is planned to tap 93t steel, 98t steel material, of which 59t molten iron, tapping carbon content 0.25%, add 1kg / t carbon powder, 3kg / t lime and 6kg / t silicomanganese.
[0034] (2) LF furnace refining process: According to the analysis after tapping, C in steel: 0.34%, first turn on large argon gas, add 0.6kg / t carbon powder, stir for 2 minutes, send electricity and add 3kg / t lime and 1.5 calcium carbide kg / t, feed 0.8kg / t of aluminum wire for 15 minutes after powering up, then continue powering up, add 4kg / t of lime and 0.3kg / t of aluminum particles, sample and analyze, adj...
Example Embodiment
[0038] Example 3
[0039] The method for producing 45# steel 50t*2 large flat steel ingots in this embodiment includes EAF furnace primary smelting furnace ingredients, tapping conditions, tapping material addition control, LF furnace refining, VD furnace vacuum treatment, and mold casting temperature control. The specific process steps are as follows:
[0040] (1) Preliminary smelting process of EAF furnace: It is planned to tap 103t steel, 109t steel material, among which molten iron 43.6t, tapping carbon content 0.15%, adding carbon powder 15kg / t, lime 3kg / t, silicomanganese 8kg / t.
[0041] (2) LF furnace refining process: According to the analysis after tapping, C in steel: 0.28%, first turn on large argon gas, add 1.2kg / t carbon powder, stir for 2 minutes, add 5kg / t lime and 1kg calcium carbide / t, feed the aluminum wire 1.0kg / t for 12 minutes, then continue to supply power, add 4kg / t lime and 0.3kg / t aluminum pellets, sample and analyze, adjust C, Si, Mn elements into the inte...
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