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An electroslag feeding method for improving the crystallization quality of large steel ingots

A feeding and crystallization technology, applied in the field of electroslag metallurgy, can solve the problems of poor solidification quality of large steel ingots, and achieve the effects of improving purity, improving purification effect, and improving quality

Active Publication Date: 2021-12-17
ANHUI FUKAI STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of poor solidification quality of large steel ingots in the prior art, and provides an electroslag feeding method for improving the crystallization quality of large steel ingots. The present invention is provided with metal consumable electrodes and graphite in the steel ingot mold Electrodes, the control graphite electrode is located in the center, and the two metal self-consumable electrodes are arranged symmetrically with respect to the graphite electrodes, and during the feeding process, the metal self-consumable electrodes are driven to move clockwise and counterclockwise alternately, so that the temperature of the entire slag pool is higher Uniform, thermal feeding for large steel ingots, improving solidification quality and metal yield

Method used

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  • An electroslag feeding method for improving the crystallization quality of large steel ingots

Examples

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Effect test

Embodiment 1

[0041] An electroslag feeding method for improving the crystallization quality of a large steel ingot in this embodiment adopts an electroslag feeding device for improving the crystallization quality of a large steel ingot, combined with figure 1 and figure 2 , the feeding device includes a steel ingot mold 70, a metal consumable electrode 40 and a graphite electrode 60, wherein the graphite electrode 60 is arranged at the center of the steel ingot mold 70; two metal consumable electrodes 40 are provided, and 2 The metal self-consumable electrodes 40 are symmetrically arranged on both sides of the graphite electrode 60. It is worth noting that the metal consumable electrodes 40 in this embodiment are made of the same material as the large steel ingot. The metal consumable electrode 40 rotates, and the rotation center of the metal consumable electrode 40 is the graphite electrode 60 .

[0042] Furthermore, the metal consumable electrode 40 in this embodiment is controlled to ...

Embodiment 2

[0053] A kind of electroslag feeding method for improving the crystallization quality of large steel ingots in this embodiment is basically the same as in Embodiment 1, further: as figure 1 As shown, in this embodiment, the metal consumable electrode 40 is inserted into the slag pool 73 at a depth greater than the graphite electrode 60 inserted into the slag pool 73 .

[0054] Specifically, the insertion depth of the graphite electrode 60 in the slag pool 73 in this embodiment is 20mm-30mm, which can be 20mm, 22mm, 23mm, 25mm...28mm or 30mm;

[0055] The insertion depth of the metal consumable electrode 40 in the slag pool 73 is 30-60 mm, which can be 30 mm, 36 mm, 40 mm, ... 50 mm ... or 60 mm.

[0056] Since in the actual production process, cooling water is sprayed on the outside of the heat preservation cap 72, the surrounding temperature must be lower than the temperature of the core. For this reason, controlling the difference in the insertion depth of the graphite elect...

Embodiment 3

[0062] An electroslag feeding method for improving the crystallization quality of large steel ingots in this embodiment is basically the same as in Embodiment 2, further: the heavy slag component located in the slag pool 73 is 80% CaF by mass percentage 2 , 15% CaO and 5% Al 2 o 3 , and the thickness of the slag layer is 250mm-300mm, which can be 250mm, 260mm, 280mm...295mm or 300mm. The metal droplets are desulfurized, dephosphorized and non-metallic inclusions are removed by heavy slag to purify the metal droplets.

[0063] It is worth noting that in this example, by controlling the Al in the heavy slag group 2 o 3 content, so that the content of T.O in the molten steel 71 reaches 15ppm-20ppm, which can effectively improve the quality of the steel ingot. In the prior art, due to Al 2 o 3 Can significantly reduce the conductivity of slag, reduce power consumption, therefore, the Al in the prior art 2 o 3 The content is relatively high, and generally its content is con...

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Abstract

The invention discloses an electroslag feeding method for improving the crystallization quality of a large steel ingot, and belongs to the technical field of electroslag metallurgy. The present invention comprises steel ingot mould, metal consumable electrode and graphite electrode, and described graphite electrode is arranged at the center of steel ingot mould; Said metal consumable electrode is provided with two, and the material of this metal consumable electrode is the same as that of large steel ingot. The material is the same, and two symmetrically arranged on both sides of the graphite electrode, the metal consumable electrode rotates with the graphite electrode as the rotation center, and the metal consumable electrode moves clockwise and counterclockwise alternately. In the present invention, metal self-consumable electrodes and graphite electrodes are arranged in the steel ingot mold, and the graphite electrodes are controlled to be located in the center. Extremely clockwise and counterclockwise alternate movement makes the temperature of the whole slag pool more uniform, heat feeds large steel ingots, improves solidification quality, and increases metal yield.

Description

technical field [0001] The invention relates to the technical field of electroslag metallurgy, in particular to an electroslag feeding method for improving the crystallization quality of large steel ingots. Background technique [0002] With the development of nuclear power construction, energy equipment and other industries, the demand for large steel ingots is increasing. However, as the size of the ingot increases, it faces more and more quality problems, the most important of which is the problem of solidification quality, especially the solidification quality at the middle and upper parts of the steel ingot is worse. Therefore, it is very important to explore the method of solidification quality of high-speed large steel ingots. [0003] In the prior art, there is a relevant technical solution for improving the solidification quality of large steel ingots by using electroslag feeding. For example, the Chinese patent number: 201510002875.X, the name of the invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/00B22D27/04C22B9/18
CPCB22D7/00B22D27/04C22B9/18
Inventor 施晓芳常立忠
Owner ANHUI FUKAI STAINLESS STEEL
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