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Device and method for low-cold electromagnetic semi-continuous casting

A semi-continuous, electromagnetic technology, applied in the field of metal material preparation, can solve the problems that the primary and secondary cooling cannot be adjusted independently, the difficulty of heat dissipation coordination in the height direction of the crystallizer, and the complex structure of the crystallizer, etc., to achieve easy maintenance and increase magnetic field wear The effect of penetrating depth and reducing skin effect

Active Publication Date: 2019-11-05
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the existing semi-continuous casting mold, such as the complex structure of the mold, the inability to adjust the primary and secondary cooling independently, the difficulty in coordinating heat dissipation in the height direction of the mold, and the electromagnetic skin effect

Method used

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  • Device and method for low-cold electromagnetic semi-continuous casting
  • Device and method for low-cold electromagnetic semi-continuous casting
  • Device and method for low-cold electromagnetic semi-continuous casting

Examples

Experimental program
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Effect test

Embodiment 1

[0074] The shaft side structure of the low-cooling electromagnetic semi-continuous casting device is as follows figure 1 As shown, the cross-sectional structure is as figure 2 As shown, it includes a melt splitting device 2, a crystallizer and a dummy head 10; the outer casing 1 of the crystallizer is composed of an outer casing top plate and an outer casing side plate to form an integrated structure, and the inner casing 3 has a structure such as Figure 4 As shown, it is cylindrical and has a connection plate 23 fixed on the outer wall of the upper part, and an inner sleeve bolt hole 24 is opened below the connection plate 23 for connecting with the upper intermediate plate 4;

[0075] An upper intermediate plate 4 is provided between the top plate of the outer jacket and the inner jacket 3; the gap between the inner edge of the bottom plate 14 of the crystallizer and the outer wall of the inner jacket 2 is used as a cooling water channel;

[0076] The inner edge of the bo...

Embodiment 2

[0096] Device structure is the same as embodiment 1, and difference is:

[0097] (1) The horizontal section of the inner sleeve is circular; there is an angle of 5° between the inner wall surface of the inner sleeve and the axis, and the top cross-sectional area of ​​the inner space of the inner sleeve is smaller than the top cross-sectional area;

[0098] (2) There is no vertical partition in the cooling water cavity;

[0099] Method is with embodiment 1, and difference is:

[0100] (1) The round ingot prepared is AZ21, with a diameter of 350mm and a length of 2500mm; the composition of the example contains Al2.5%, Zn 0.75%, Mn 0.25%, Fe<0.001%, and the rest are magnesium by mass percentage;

[0101] (2) The flow ratio of the secondary cooling water to the primary cooling water per unit time is 0.8; due to the casting of round ingots, there is no difference between wide-surface cooling water and narrow-surface cooling water;

[0102] (3) The flow ratio of the tertiary cooli...

Embodiment 3

[0105] Device structure is the same as embodiment 1, and difference is:

[0106] (1) The horizontal section of the inner sleeve is circular; there is an angle of 5° between the inner wall surface of the inner sleeve and the axis, and the top cross-sectional area of ​​the inner space of the inner sleeve is smaller than the top cross-sectional area;

[0107] (2) There is no vertical partition in the cooling water cavity;

[0108] Method is with embodiment 1, and difference is:

[0109] (1) The round ingot prepared is ZK60, with a diameter of 400mm and a length of 2000mm; the composition of the example contains Zn5.7%, Zr0.50%, Fe<0.008%, and the rest are magnesium by mass percentage;

[0110] (2) The flow rate ratio of the secondary cooling water to the primary cooling water per unit time is 1.2; there is no difference between the wide surface cooling water and the narrow surface cooling water due to the casting of round ingots;

[0111] (3) The flow ratio of the third cooling...

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Abstract

The invention provides a device and method for low-cold electromagnetic semi-continuous casting. The device comprises a crystallizer, wherein an upper dielectric plate is disposed between an outer sleeve top plate and an inner sleeve; clearance between the inner edge of an baseplate of the crystallizer and the outer wall of the inner sleeve is taken as a cooling water channel; the inner sleeve issurrounded by a water stop plate; and space between the water stop plate and an outer sleeve side plate is taken as a cooling water cavity. The method comprises the steps that (1) cooling water is fedinto the cooling water cavity via a cooling water inlet pipe, and then first cooling water and secondary cooling water are formed and sprayed to the outer wall of the inner sleeve; (2) an magnetic exciting coil is powered on by a power source, and a magnetic field is generated; (3) an alloy melt is poured into the inner sleeve, and a dummy bar head is started for continuous casting; and (4) thirdcooling water is sprayed to an ingot casting surface via a third cooling water pipe. The device provided by the invention has the beneficial effects that the structure is simple; maintenance is easy;production efficiency can be increased; cooling intensity can be controlled and regulated easily; and surfaces of large-size ingot castings prepared are of good quality.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, in particular to a low-cool electromagnetic semi-continuous casting device and method. [0002] technical background [0003] Direct chill (DC) casting is semi-continuous casting, which has the advantages of high crystallization speed, good mechanical properties, high metal purity, and high production efficiency. It is one of the main methods for preparing metal and its alloy ingots in industrial production, especially aluminum , Magnesium, copper and their alloy ingots are prepared; in the semi-continuous casting process, the metal melt passes through the water-cooled crystallizer, and the secondary cooling is continuously crystallized and solidified into a billet. [0004] With the development of China's rail transit, aerospace, communication electronics and military industries, the demand for large-scale, high-quality ingots and large and medium-sized structural profiles is i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/14B22D11/049B22D11/055B22D11/124
CPCB22D11/049B22D11/055B22D11/124B22D11/14
Inventor 乐启炽贾永辉王航牛燕霞赵大志
Owner NORTHEASTERN UNIV LIAONING
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