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High aluminum steel special continuous casting crystallizer casting powder

A continuous casting mold and mold flux technology, which is applied in the field of mold flux, can solve problems such as high production costs, surface quality problems of slabs, and unsmooth processes.

Active Publication Date: 2013-06-05
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the continuous casting of this type of steel, the current domestic mold powder products mainly rely on imports. The existing problems are: (1) The cost of mold powder is high, As a result, the production cost of the product remains high; (2) the imported slag cannot be effectively adjusted in time according to the specific process conditions in our country, and it is difficult to meet the actual needs; (3) due to the large number of inclusions and the It is in the shape of a high melting point, so the quality of mold flux is easy to deteriorate during use, resulting in unsmooth process and many problems with the surface quality of the slab, which increases the production cost of iron and steel enterprises, so a low-cost, high-quality surface is required. Special mold flux for continuous casting mold for high aluminum steel

Method used

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  • High aluminum steel special continuous casting crystallizer casting powder
  • High aluminum steel special continuous casting crystallizer casting powder
  • High aluminum steel special continuous casting crystallizer casting powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The continuous casting mold powder for high aluminum steel provided in this example is shown in the ingredient list 1

[0021]

[0022] Ingredients list 1

[0023] A steel plant continuous casting process: casting section 220*1600mm 2 , Pulling speed 0.8 ~ 1.2m / min.

[0024] When pouring starts, the mold slag of the present invention is evenly pushed into the crystallizer, and it is required to evenly cover the entire molten steel surface. Between 60mm, keep the black slag operation, and do not expose the molten steel surface.

[0025] After pouring, the liquid steel level fluctuates within 5mm, and the casting speed is stable at 0.95m / min. At this time, the thickness of the liquid slag layer is measured to be about 10mm. After that, measure the liquid slag layer every 20 minutes, and its thickness is 8-12mm. During the casting process, the mold slag spreads well in the crystallizer, there is no crusting and agglomeration, ...

Embodiment 2

[0029] For the high-alumina continuous casting mold flux provided in this example, see ingredient list 2:

[0030]

[0031] Ingredients list 2

[0032] B steel plant continuous casting process: casting section 230*1600mm 2 , Pulling speed 0.9 ~ 1.3m / min.

[0033] When pouring starts, the mold slag of the present invention is evenly pushed into the crystallizer, and it is required to evenly cover the entire molten steel surface. Between 60mm, keep the black slag operation, and do not expose the molten steel surface.

[0034]After pouring, the liquid steel level fluctuated within 3mm, and the casting speed was stable at 1.2m / min. At this time, the thickness of the liquid slag layer was measured to be about 10mm. After that, measure the liquid slag layer every 20 minutes, and its thickness is between 9 and 12 mm. During the casting process, the mold slag spreads well in the crystallizer, there is no crusting and agglomeration, the flame is mode...

Embodiment 3

[0038] For the high-alumina continuous casting mold flux provided in this example, see ingredient list 3:

[0039]

[0040] Ingredients list 3

[0041] C steel plant continuous casting process: casting section 220*1600mm 2 , Pulling speed 0.8 ~ 1.4m / min.

[0042] When pouring starts, the mold slag of the present invention is evenly pushed into the crystallizer, and it is required to evenly cover the entire molten steel surface. Between 60mm, keep the black slag operation, and do not expose the molten steel surface.

[0043] After pouring, the fluctuation of liquid steel level is within 6mm, and the casting speed is stable at 1m / min. At this time, the thickness of liquid slag layer is measured to be about 10mm. After that, measure the liquid slag layer every 20 minutes, and its thickness is 10-12mm. During the casting process, the mold slag spreads well in the crystallizer, there is no crusting and agglomeration, the flame is moderate, and ...

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Abstract

The invention discloses high aluminum steel special continuous casting crystallizer casting powder, and the raw material formula proportion of parts by weight of the high aluminum steel special continuous casting crystallizer casting powder includes the premelting material 7 - 13 parts, fluorite powder 9 - 11 parts, industrial soda ash 4 - 6 parts, carbon black 6 parts, earthy graphite 3 - 6 parts, calcium balls 24 - 31 parts, refining slag 17 - 25 parts, lithium carbonate 3 parts, bauxite 9 - 15 parts, barium carbonate 4 parts, manganese carbonate 3 parts and borax 5 parts. The high aluminum continuous casting powder can effectively overcome the quality defects that more inclusions exist in a high aluminum steel continuous casting process and the melting point is high, and the quality of ordinary casting powder is extremely easy to deteriorate in the using process so that the process is not smooth, and cracks and concave pits are easy to appear on the surface of a casting blank and the production cost of iron and steel enterprises is increased. The high aluminum steel special continuous casting crystallizer casting powder achieves the use value maximally under the same resource conditions.

Description

Technical field [0001] The present invention is a technical field of protection, and especially involves a high -aluminum steel -dedicated connected crystal crystal protection residue. Background technique [0002] At present, many of the steel types in most domestic steel factories use aluminum dehydration. However, for some steel, it has a high aluminum content, such as low -carbon aluminum sediment steel, 38CRMOAL, aluminum stainless steel, high aluminum TRIP base steel, etc.For the continuous casting of these steel species, AL in the steel water 2 O 3 There are many categories. Due to the high melting point of this type of miscellaneous or complex, it is very easy to increase the melting point and viscosity after the protection of the residue, which will cause the performance of the residue to deteriorate and the effect of use.Reduce corporate competitiveness. [0003] A high -aluminum steel linked crystal device is released in CN 102389955 A. The composition of the compositi...

Claims

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Application Information

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IPC IPC(8): B22D11/111B22D11/07
Inventor 李晓阳张福杜震宇马帅赵春宝屈党军马晓娜王岩王旭阳
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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