Device and method for fine adjustment of molten steel components and for modification of inclusions in continuous casting tundish

A continuous casting tundish and tundish technology, which is applied in the direction of casting molten material containers, casting equipment, manufacturing tools, etc., can solve the problems of poor cleanliness, poor toughness of steel, uneven composition of molten steel, etc., and reduce gasification , prolong the residence time, improve the yield and utilization

Inactive Publication Date: 2019-09-20
NORTHEASTERN UNIV
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  • Application Information

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Problems solved by technology

[0010] According to the above-mentioned technical problems such as poor cleanliness, poor steel toughness, and uneven composition of molten steel in the process of regulating and controlling molten steel in the tundish, a method for fine-tuning the composition of molten steel in continuous casting tundish and modifying inclusions is provided. device and method

Method used

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  • Device and method for fine adjustment of molten steel components and for modification of inclusions in continuous casting tundish
  • Device and method for fine adjustment of molten steel components and for modification of inclusions in continuous casting tundish
  • Device and method for fine adjustment of molten steel components and for modification of inclusions in continuous casting tundish

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Embodiment 1

[0051] The invention relates to a device for fine-tuning molten steel composition and modification treatment of inclusions in a tundish. image 3 , Figure 4 The dimension parameters shown are examples.

[0052] The specific method is as follows: molten steel enters the tundish swirl chamber 2 from the ladle shroud 5 located in the center of the tundish swirl chamber 2, and at the same time utilizes the inclined blowing nozzles uniformly arranged along the circumference on the side wall of the tundish swirl chamber 2 Argon gas is blown in the air hole 4, and the alloy powder is blown into the tundish swirl chamber 2 by using argon as the carrier. The molten steel and the alloy powder are fully mixed in the tundish swirl chamber 2, and the fine-tuning of the composition of the molten steel and the improvement of inclusions are preliminarily completed. Then it flows into the rectangular chamber 1 of the tundish from the outlet 3 of the molten steel, and finally flows into the c...

Embodiment 2

[0058] The geometry and size parameters of the tundish rectangular chamber 1 and the tundish swirl chamber 2 involved in this embodiment are the same as those in Embodiment 1, except for the type of alloy powder to be injected and the injection parameters.

[0059] The alloy powder is calcium alloy powder, which is used for modification treatment of inclusions in the tundish. The particle size of the alloy powder is less than 50 μm. The amount of steel added per ton is 90kg. The inclusion content decreases and the inclusion removal rate increases.

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Abstract

The invention provides a device and method for fine adjustment of molten steel components and for modification of inclusions in a continuous casting tundish. The device mainly consists of a tundish rectangular chamber and a tundish rotational flow chamber, wherein the tundish rotational flow chamber is located at one side of the tundish, is provided with an independent reaction chamber and is fixedly connected with the tundish rectangular chamber to form a main structure of the device; a molten steel outlet is formed in the upper side wall of the tundish rotational flow chamber; and a plurality of blowing holes are circumferentially formed in the side wall at a certain height from the bottom of the tundish rotational flow chamber. According to the device and the method, alloy powder is blown into the tundish rotational flow chamber by blowing in carrier gas through the blowing holes, and the fine adjustment of the molten steel components and the modification treatment of the inclusions in the tundish are preliminarily finished inside; and due to the driving action of the blown-in gas, the molten steel rotatably flows, the interaction time of the blown-in alloy powder and the molten steel is prolonged, and the alloy powder and the molten steel are fully blended, so that the yield and the utilization rate of alloy elements are improved, and the alloy components in the molten steel are uniform.

Description

technical field [0001] The invention relates to the technical field of continuous casting, in particular to a device and method for fine-tuning molten steel composition and modifying inclusions in a continuous casting tundish. Background technique [0002] In the continuous casting process, the tundish is the last reactor in the steel production process, and it is an intermediate device connecting the transfer ladle and the continuous casting crystallizer. With the development of continuous casting technology, the position of the tundish in molten steel refining and role is gaining increasing attention. In addition to the basic functions of molten steel distribution, stable pouring and pouring protection, the tundish can also be used as a refining container for molten steel. Through tundish metallurgy, it can prevent secondary oxidation and gas absorption of molten steel, improve the flow state of molten steel, prevent slag entrainment and promote the floating of inclusions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/11B22D41/00
CPCB22D11/11B22D41/00
Inventor 罗志国刘志远顾英杰杨伟栋邹宗树
Owner NORTHEASTERN UNIV
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