Process for controlling smelting silicon content of low-silicon steel
A technology of silicon content and low silicon steel is applied in the low silicon steel smelting silicon content control process, the low silicon variety steel prevents the increase of silicon in the smelting process and stably controls the silicon content of the molten steel end point, and can solve the problem of poor slag blocking in tapping and casting blanks. , change the judgment and other issues, to achieve the effect of improving the hit rate of the end component, improving economic benefits and reducing production costs
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Embodiment 1
[0022] The low-silicon steel smelting silicon content control technological process of the present embodiment is as follows figure 1 shown, including:
[0023] Converter smelting process:
[0024] ①Deep desulphurization operation: The incoming molten iron is pretreated by desulfurization and cleaned of slag, requiring [S]0.002%; controlling impurities in scrap steel, reducing sulfur content in converter steel, reducing the desulfurization burden of LF process to create strong reduction slag, and preventing strong reduction Atmosphere, long-time refining and other factors reduce the silicon in the top slag of the ladle, causing the molten steel to return to silicon;
[0025] ②End point operation: improve the hit rate of one-time carbon drawing, avoid point blowing, prevent molten steel from overoxidation, control the oxygen in the steel by controlling the carbon at the end point of the converter, and improve the tapping of the converter as much as possible under the condition ...
Embodiment 2
[0034] The low-silicon steel smelting silicon content control technological process of the present embodiment is as follows figure 1 shown, including:
[0035] Converter smelting process:
[0036] ①Deep desulphurization operation: The incoming molten iron is pretreated by desulfurization and cleaned of slag, requiring [S] 0.0015%; controlling impurities in scrap steel, reducing sulfur content in converter steel, reducing the desulfurization burden of LF process to create strong reduction slag, and preventing strong reduction Atmosphere, long-time refining and other factors reduce the silicon in the top slag of the ladle, causing the molten steel to return to silicon;
[0037] ②End point operation: improve the hit rate of one-time carbon drawing, avoid point blowing, prevent molten steel from overoxidation, control the oxygen in the steel by controlling the carbon at the end point of the converter, and improve the tapping of the converter as much as possible under the conditio...
Embodiment 3
[0046] The low-silicon steel smelting silicon content control technological process of the present embodiment is as follows figure 1 shown, including:
[0047] Converter smelting process:
[0048] ①Deep desulphurization operation: The incoming molten iron is pretreated by desulfurization and cleaned of slag, requiring [S] 0.001%; controlling impurities in scrap steel, reducing sulfur content in converter steel, reducing the desulfurization burden of LF process to create strong reduction slag, and preventing strong reduction Atmosphere, long-time refining and other factors reduce the silicon in the top slag of the ladle, causing the molten steel to return to silicon;
[0049] ②End point operation: improve the hit rate of one-time carbon drawing, avoid point blowing, prevent molten steel from overoxidation, control the oxygen in the steel by controlling the carbon at the end point of the converter, and improve the tapping of the converter as much as possible under the conditi...
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