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Coverage dregs for ladle

A technology of covering slag and ladle, which is applied in the field of ladle covering slag, which can solve the problems of magnetic deterioration of finished silicon steel, inconvenience in actual production, and narrow composition range of covering slag.

Inactive Publication Date: 2005-08-31
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the SiO in the acid slag 2 It is also easy to react with Al in molten steel, which is not conducive to the stability of molten steel composition. Therefore, in practical applications, the composition range of covering slag is relatively narrow, and the operation flexibility is small, which brings inconvenience to actual production.
Nevertheless, the sulfur and aluminum in molten steel are still easy to change, resulting in poor magnetic properties of finished silicon steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] C

[0011] Table 1

Embodiment 2

[0013] C

[0014] Table 2

Embodiment 3

[0017] table 3

[0018] It can be seen from the above examples that, after adopting the present invention, the stability of acid-soluble aluminum and sulfur contents in molten steel can be ensured at the same time. Experiments show that after using the invention, molten steel can be kept at 1530-1590°C for 50 minutes, and the loss of aluminum in molten steel is less than 13%, and the loss of S is less than 8%. Satisfy the composition requirements of billet (ingot).

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PUM

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Abstract

A covering slag for steel ladle to decrease the loss of Al and S in molten steel proportionally contains CaO, SiO2, MgO, Al2O3, and FeS as additive.

Description

technical field [0001] The invention relates to a ladle covering slag, in particular to a steel smelting and continuous casting field, which is suitable for use as a ladle covering slag when smelting and continuously casting oriented silicon steel. Background technique [0002] Oriented silicon steel contains less than 4% Si (percentage by weight, the same below), 0.001-0.08% Al, 0.01-0.04% S, and elements such as Mn, P, and C. Its composition is characterized by high sulfur content and The aluminum content is low, and the allowable fluctuation range of aluminum and sulfur content is narrow, and the composition exceeding the allowable range will damage the magnetic properties of the finished product. The composition of molten steel needs to be adjusted when it is refined outside the furnace, and then it is continuously cast into billets. During the continuous casting process, the molten steel is kept warm by the ladle until the pouring is completed. Since the continuous ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
Inventor 郑庆
Owner BAOSHAN IRON & STEEL CO LTD
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