Refining device and vacuum refining process for use in non-oriented silicon steel production
A technology of oriented silicon steel and refining equipment, which is applied in the field of steelmaking and refining, can solve the problems of limiting the performance of silicon steel products and high sulfur content, and achieve the effects of reducing production costs and improving production efficiency
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[0031] Example 1
[0032] Using the refining device for the production of non-oriented silicon steel, the vacuum refining process of the present invention is used to produce non-oriented silicon steel W600
[0033] (1) When the converter is tapped, the carbon content in the steel is controlled to be 0.03 to 0.04%, and the dissolved oxygen in the steel is greater than 600 ppm.
[0034] (2) The VD vacuum chamber 2 adopts forced oxygen blowing to decarburize, reducing the carbon in the steel to less than 0.0025%.
[0035] (3) After the decarburization, add ferrosilicon, Al, lime and other slag materials to the ladle 1 through the wire feeding device 6, adjust the [Si] and [Al] content in the molten steel to the target value, and control the content of the slag (FeO+MnO)≤1.0%.
[0036] (4) After the ladle is covered, vacuum is started, and at the same time, argon gas is blown into the air-permeable brick at the bottom of the ladle in three ways for stirring. The flow of argon in each chan...
Example Embodiment
[0039] Example 2
[0040] Using the refining device for non-oriented silicon steel production, the vacuum refining process of the present invention is used to produce non-oriented silicon steel W800.
[0041] (1) When the converter is tapped, the carbon content in the steel is controlled to be 0.03-0.04%, and the dissolved oxygen in the steel is greater than 600ppm.
[0042] (2) VD vacuum chamber 2 adopts forced oxygen blowing to decarburize, reducing the carbon in steel to 0.0020%.
[0043] (3) After the decarburization, add ferrosilicon, Al, lime and other slag materials to the ladle 1 through the wire feeding device 6, adjust the [Si] and [Al] content in the molten steel to the target value, and control the content of the slag (FeO+MnO)≤0.8%.
[0044] (4) After the ladle is covered, vacuum is started, and argon gas is blown into 3 paths from the bottom of the ladle to stir. The flow of argon in each channel is 600Nl / min, and the total flow can reach 1800Nl / min.
[0045] By using the...
Example Embodiment
[0046] Example 3
[0047] Using the refining device for the production of non-oriented silicon steel, the vacuum refining process of the present invention is used to produce non-oriented silicon steel W500
[0048] (1) When the converter is tapped, the carbon content in the steel is controlled to be 0.04-0.05%, and the dissolved oxygen in the steel is greater than 600ppm.
[0049] (2) The VD vacuum chamber 2 uses forced oxygen blowing to decarburize, reducing the carbon in the steel to less than 0.0030%.
[0050] (3) After the decarburization, add ferrosilicon, Al, lime and other slag materials to the ladle 1 through the wire feeding device 6, adjust the [Si] and [Al] content in the molten steel to the target value, and control the content of the slag (FeO+MnO)≤1.0%. (4) After the ladle is covered, the vacuum is drawn, and argon is blown into the air-permeable brick at the bottom of the ladle in three ways for stirring. The flow of argon in each channel is 600Nl / min, and the total f...
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