High-speed rail wire alloy copper rod continuous casting crystallizer and production process thereof

A casting crystallizer and production process technology, applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the uncontrollable length stability of the pulling copper rod, increase the cost and difficulty of the copper rod used for high-speed rail, and the uniformity of the inside of the copper rod To avoid problems such as inconsistency, to achieve the effect of easy regular replacement, maintain the quality of pulling, and the surface is smooth and scratch-free

Active Publication Date: 2019-05-03
青岛卓越碳素制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current crystallizer made of graphite has the following disadvantages: the copper rod used in high-speed iron must be drawn once to maintain the uniformity of the internal structure and stabilize the conductivity. The length stability of the copper rod cannot be controlled. If the average length of the qualified copper rod pulled out by the crystallizer under normal service life is L, the current part of the mold has a pulling length of 2L, and the pulling length of a part of the mold is 0.5L. The crystallizer was damaged during the pulling process of the copper rod and the pulling of the copper rod was interrupted. Even if the pulling could continue, the pulled copper rod could not be used on the high-speed rail locomotive due to the uneven internal uniformity, resulting in all the pulled copper rod products Scrap, greatly increasing the cost and difficulty of producing copper rods for high-speed rail

Method used

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  • High-speed rail wire alloy copper rod continuous casting crystallizer and production process thereof
  • High-speed rail wire alloy copper rod continuous casting crystallizer and production process thereof
  • High-speed rail wire alloy copper rod continuous casting crystallizer and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment one: a kind of high-iron wire alloy copper rod continuous casting crystallizer, such as figure 1 As shown, the graphite tube body 11 is included, and the graphite tube body 11 is provided with a cylindrical through-hole 111 of equal diameter along the axial direction, and the inner wall of the graphite tube body 11 is located in the through-hole 111 and is coated with a layer of 4-6um thick pyrolytic carbon coating. layer. According to needs, a layer of 4-6um thick pyrolytic carbon coating can also be coated on the two ends and the outer surface of the graphite tube body 11 . The graphite tube body 11 can be designed into a cylindrical shape as required, and the outer surface of one end of the cylindrical shape is provided with an external thread for threaded connection with the protective cover; the graphite tube body 11 can also be designed as a truncated cone to facilitate the cooperation of the crystallizer and the protective cover.

[0044] The graphite...

Embodiment 2

[0045] Embodiment two: a kind of production technology of high-iron wire alloy copper rod continuous casting crystallizer, such as figure 2 shown, including the following steps:

[0046] S1: Mix petroleum coke and pitch coke materials with a particle size of 15um to 25um, add molten pitch as a binder, and mold graphite blocks. The particle size of the petroleum coke can be 30-50 mesh, and the ash content of the petroleum coke is not more than 0.15%. Add graphite with a purity of 99.99%, mix evenly, put it into a mold and mold it, and obtain a cuboid or cylinder graphite block. The bulk density of the graphite block is controlled at 1.75g / cm 3 .

[0047] S2: The graphite block is sequentially subjected to primary roasting, primary dipping, secondary roasting, secondary dipping, triple roasting, triple dipping, and fourth roasting.

[0048] The roasting method is: put the graphite block into the vacuum furnace and slowly heat it to 1200°C at an average rate of ≤100°C / day, ke...

Embodiment 3

[0055] Embodiment three: a kind of production technique of continuous casting crystallizer of high-iron wire alloy copper rod, such as figure 2 shown, including the following steps:

[0056] S1: Mix petroleum coke and pitch coke materials with a particle size of 15um to 25um, add molten pitch as a binder, and mold graphite blocks. The particle size of the petroleum coke can be 30-50 mesh, and the ash content of the petroleum coke is not more than 0.15%. Add graphite with a purity of 99.99%, mix evenly, put it into a mold and mold it, and obtain a cuboid or cylinder graphite block. The bulk density of the graphite block is controlled at 1.73g / cm 3 .

[0057] S2: The graphite block is sequentially subjected to primary roasting, primary dipping, secondary roasting, secondary dipping, triple roasting, triple dipping, and fourth roasting.

[0058] The roasting method is: put the graphite block into the vacuum furnace and slowly heat it to 1200°C at an average rate of ≤100°C / day...

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Abstract

The invention discloses a high-speed rail wire alloy copper rod continuous casting crystallizer and a production process thereof, and relates to the technical field of crystallizers. According to thetechnical scheme, the crystallizer is characterized by comprising a graphite tube body, wherein the fixed carbon content of the graphite tube body is not lower than 99.95%, the density of the graphitetube body is 1.80-1.88 g/cm<3>, a through hole penetrating through the graphite tube body is formed in the axis, the roughness of the inner surface of the through hole is at least Ra 0.8, and a pyrolytic carbon coating with the thickness of 4-6 microns is coated on the side wall of the through hole of the graphite tube body. According to the high-speed rail wire alloy copper rod continuous casting crystallizer, the problem that due to the fact that the service life of an existing crystallizer for copper rod continuous casting is not stable, the production of a copper rod for the high-speed rail is affected is solved, three times of immersion, four times of baking and purification treatment are carried out on graphite, so that the service life of the graphite crystallizer is prolonged, andthe stability of the graphite crystallizer is improved.

Description

technical field [0001] The invention relates to the technical field of graphite deep processing, more specifically, it relates to a continuous casting crystallizer for high-iron wire alloy copper rods and a production process thereof. Background technique [0002] With the rapid development of my country's high-speed railway and urban rail transit, the working environment and safety of rolling stock cables used in high-speed rail and urban rail vehicles determine the particularity of the cables used, especially the conductivity of the copper wire inside the cable requires consistency Otherwise, sudden changes in the current during operation are likely to affect the smooth operation of the rolling stock. [0003] Prior art reference application publication number is CN108823428A invention patent discloses a kind of preparation method of oxygen-free copper rod, mainly comprises the following steps: (1) put electrolytic copper raw material into holding furnace and bake for 3-5 h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/057B22D11/059B22C3/00
Inventor 谢旺
Owner 青岛卓越碳素制品有限公司
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