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Method for continuously converting and casting oxygen-free copper ingot

A technology of oxygen-free copper and copper liquid, which is applied in the field of metal smelting and casting, can solve problems such as inability to reduce, and achieve the effects of being beneficial to storage, reducing oxygen content, and simple structure

Active Publication Date: 2008-10-01
ZHEJIANG HAILIANG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only reduce the oxygen content to 7-10ppm, but not below 5ppm.
And can only produce small-sized low-end products

Method used

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  • Method for continuously converting and casting oxygen-free copper ingot
  • Method for continuously converting and casting oxygen-free copper ingot

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Embodiment Construction

[0023] The present invention adopts an oxygen-free copper ingot continuous blowing casting furnace, which is mainly composed of a furnace shell 3 with refractory bricks 1 and refractory materials 2, a smelting furnace 4 with an electric induction heater 17 at the bottom and a deoxidation furnace arranged side by side in the furnace shell 3 10, placed between the smelting furnace 4 and the deoxidation furnace 10, the bottom blowing launder 19 with the breathable brick 22 at the bottom, connected with the deoxidation furnace 10, the bottom blowing furnace head 11 with the casting port 20 and the bottom blowing brick 12 at the bottom, placed in the bottom blowing The diversion groove 21 distributed in an "S" shape in the furnace head 11, the melting furnace cover 5 placed on the upper part of the melting furnace 4, and the deoxidizing furnace cover 9 with an exhaust port 8 placed on the upper part of the deoxidizing furnace 10 are formed. The electric induction heater 17 is compos...

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Abstract

The invention provides a continuous blowing and casting method of oxygen-free copper ingots, which pertains to the metal smelting and casting technical field and is carried out according to the technical steps as follows: A. cathode copper is firstly melted in a smelting furnace, and melted copper liquid enters a deoxidation furnace through a bottom blowing chute; B. carbon monoxide gas or the mixed gas of carbon monoxide and nitrogen enters the copper liquid in the bottom blowing chute through the bottom blowing chute and enters the deoxidation furnace with the copper liquid to realize the deoxidation and the degassing of a first stage; C. when passing through a diversion trench arranged in a bottom blowing furnace end, the carbon monoxide gas or the mixed gas of carbon monoxide and nitrogen enters the copper liquid in the diversion trench for realizing the deoxidation and the degassing of a second stage to the copper liquid in the diversion trench; D. the copper liquid after the second stage of deoxidation and degassing enters a crystallizer through a casting gate arranged in the bottom blowing furnace end. The oxygen content of an oxygen-free copper ingot base produced by the method of the invention can stably reach not only less than 5ppm, but also less than 3ppm.

Description

technical field [0001] The invention relates to an oxygen-free copper ingot continuous blowing and casting method, which belongs to the technical field of metal melting and casting. Background technique [0002] The conductivity of pure copper is second only to silver, and its price is much lower than that of silver. Therefore, pure copper is widely used as a conductive material in the fields of electrical engineering and electronics after smelting, casting and processing. However, copper is easy to combine with oxygen at high temperature to form cuprous oxide. After solidification and crystallization, cuprous oxide is distributed at the grain boundary. The increase of oxygen content in copper reduces the conductivity of copper, which cannot reach more than 100% of pure copper. conductivity. The oxygen content in pure copper materials produced by conventional smelting and casting methods is ≥50PPm, and with the development of electronics and communication industries, pure ...

Claims

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Application Information

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IPC IPC(8): B22D21/00C22B9/05
Inventor 赵学龙曹建国王斌陈玉良狄大江魏连运
Owner ZHEJIANG HAILIANG
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