Method for producing boron steel by converter
A boron steel and converter technology, applied in the field of boron steel production by converter, can solve the problems of short production cost, poor pourability of molten steel, long production process, etc., and achieve the effects of short production process, low production cost and high production efficiency
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Embodiment 1
[0019] Example 1: Production of SAE10B08 boron-containing steel
[0020] See attached figure 1 , 98t molten iron and 27t steel scrap are added into the top and bottom combined blowing converter, totaling 125t for blowing. Converter tapping (115t), the tapping temperature is 1660℃, argon is blown at the bottom of the ladle throughout the tapping process, the argon flow rate is 350NL / min, and the argon pressure is 0.4-0.5MPa. After tapping 1 / 4, add 92kg of deoxidizer steel core aluminum (Al: 50%) to the ladle, which is 0.8kg per ton of steel, as well as 625kg of alloy ferromanganese (Mn: 65%) and 192kg of ferrosilicon (Si: 75). %), silicon-aluminum-barium-iron 100kg (Ba: 18%) for pre-deoxidation and alloying. The order of addition is ferromanganese → ferrosilicon → silicon-aluminum-barium iron → steel core aluminum. At the same time, 100kg of desulfurizing agent is added, that is, 0.87kg per ton of steel. 300kg of lime is subjected to desulfurization treatment. The main components o...
Embodiment 2
[0022] Example 2: Production of SAE10B10 boron-containing steel
[0023] See attached figure 1 , 97t molten iron and 28t scrap steel are added into the top and bottom combined blowing converter, totaling 125t for blowing. Converter tapping (114t), tapping temperature is 1665°C, argon is blown at the bottom of ladle throughout the tapping process, argon flow rate is 340NL / min, and argon pressure is 0.4-0.5MPa. 1 / 4 of the tapping starts to add 98kg of deoxidizer steel core aluminum (Al: 48%) to the ladle, which is 0.86kg per ton of steel, as well as 728kg of alloy ferromanganese (Mn: 65%) and 236kg of ferrosilicon (Si: 75 %), 105kg of silicon-aluminum-barium-iron (Ba: 18%) for pre-deoxidation and alloying. The order of addition is ferromanganese → ferrosilicon → silicon-aluminum-barium iron → steel core aluminum. At the same time, add 80kg of desulfurizing agent, that is, 0.7kg per ton of steel. 320kg of lime is used for desulfurization. The main components of the desulfurizer are: ...
Embodiment 3
[0025] Example 3: Production of SAE10B18 boron-containing steel
[0026] See attached figure 1, 99t molten iron and 26t steel scrap are added into the top and bottom combined blowing converter, totaling 125t for blowing. The converter tapping (115t), the tapping temperature is 1670℃, argon is blown at the bottom of the ladle throughout the tapping process, the argon flow rate is 360NL / min, and the argon pressure is 0.4-0.5MPa. After tapping 1 / 4, add 115kg of steel core aluminum (Al: 49%), which is 1.0kg per ton of steel, and 1350kg of alloy ferromanganese (Mn: 65%) and 345kg of ferrosilicon (Si: 75 %), 110kg of silicon-aluminum-barium-iron (Ba: 18%) for pre-deoxidation and alloying. The order of addition is ferromanganese → ferrosilicon → silicon-aluminum-barium iron → steel core aluminum. At the same time, add 115kg of desulfurizing agent, that is, 1.0kg per ton of steel. 310kg of lime is subjected to desulfurization treatment. The main components of the desulfurizer are as follo...
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