Oxygen-free copper bar suitable for cable and preparing method of oxygen-free copper bar

An oxygen-free copper rod and cable technology, which is applied in the field of electrical copper, can solve the problems of high cost of copper rods, insufficient purity of raw materials, and difficulty in realizing the up-leading method, etc.

Inactive Publication Date: 2016-03-02
JINYUAN ELECTRIC GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, in the process of preparing oxygen-free copper rods by using the up-drawing method, the cost of copper rods is relatively high. One of the ways to effectively reduce the cost of copper rods is to use recycled copper such as smelting waste copper wires as raw materials, but using recycled Copper is used as a raw material, and it is easy to realize the upward citation method due to the insufficient purity of the raw material.
The main reason for the above phenomenon is that in the prior art, the preparation method of oxygen-free copper rod is not ideal enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of the oxygen-free copper rod of applicable cable that the present invention proposes, comprises the steps:

[0018] S1. Add recycled copper into the melting furnace for melting. During the melting process, control the furnace temperature at 1200±10°C, add recycled copper into the melting furnace, and raise the furnace temperature to 1°C / min after adding the recycled copper. 1250±5℃, keep warm until the recycled copper melts, refine after melting, remove impurities, during the refining process, add coke to remove slag after the first refining, then add lime to remove slag after the second refining; among them, the first During the refining process, air is blown into the copper liquid with a blast pressure of 0.35 MPa; a mixed gas of natural gas and nitrogen is passed into the copper liquid for reduction and purification, and the aeration time is 1 hour;

[0019] S2. Use flake graphite to cover the copper liquid to form a covering layer. The ...

Embodiment 2

[0023] A kind of preparation method of the oxygen-free copper rod of applicable cable that the present invention proposes, comprises the steps:

[0024] S1. Put recycled copper into the smelting furnace for melting. During the melting process, control the furnace temperature at 1200±10°C. Add the recycled copper into the melting furnace. After adding the recycled copper, raise the furnace temperature to 2°C / min. 1250±5℃, keep warm until the recycled copper melts, refine after melting, remove impurities, during the refining process, add coke to remove slag after the first refining, then add lime to remove slag after the second refining; among them, the first During the refining process, air is blown into the copper liquid with a blast pressure of 0.4MPa; a mixed gas of natural gas and nitrogen is introduced into the copper liquid for reduction and purification, and the aeration time is 2 hours;

[0025] S2. Use flake graphite to cover the copper liquid to form a covering layer....

Embodiment 3

[0029] A kind of preparation method of the oxygen-free copper rod of applicable cable that the present invention proposes, comprises the steps:

[0030] S1. Add recycled copper into the melting furnace for melting. During the melting process, control the furnace temperature at 1200±10°C, add recycled copper into the melting furnace, and raise the furnace temperature to 1.2°C / min after adding the recycled copper. 1250±5℃, keep warm until the recycled copper melts, refine after melting, remove impurities, during the refining process, add coke to remove slag after the first refining, then add lime to remove slag after the second refining; among them, the first During the refining process, air is blown into the copper liquid with a blast pressure of 0.36MPa; a mixed gas of natural gas and nitrogen is passed into the copper liquid for reduction and purification, and the aeration time is 1.2h;

[0031] S2. Use flake graphite to cover the copper liquid to form a covering layer. The t...

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Abstract

The invention discloses an oxygen-free copper bar suitable for a cable and a preparing method of the oxygen-free copper bar. The preparing method of the oxygen-free copper bar comprises the following steps that reclaimed copper is added into a smelting furnace to be molten and then refined, impurities are removed, and mixed gas of natural gas and nitrogen is introduced into molten copper for one to two hours for reduction and purification; and the molten copper is covered with crystalline flake graphite, so that a covering layer is formed, bar-shaped Cu-RE alloy penetrates through the covering layer to be added into the molten copper for alloying of rare earth elements, the percentage by weight of the rare earth elements is 0.1%-0.2%, a hollow crystallizer is directly stretched into the molten copper and cooled through a water spacer bush, the molten copper is condensed into a solid in the hollow crystallizer, and the upper end of the solid is drawn into the oxygen-free copper bar through a drawing mechanism.

Description

technical field [0001] The invention relates to the technical field of electrical copper, in particular to an oxygen-free copper rod suitable for cables and a preparation method thereof. Background technique [0002] With the development of the electrical industry, the market demand for copper materials for cables, wires, switches and power supply and distribution equipment has increased rapidly. Oxygen-free copper rods are copper materials widely used to make electrical cables. At present, among the production methods of oxygen-free copper rods, the quality of oxygen-free copper rods obtained by the above method is the most stable. However, in the prior art, the cost of the copper rod is relatively high in the process of preparing the oxygen-free copper rod by the upward drawing method. One of the ways to effectively reduce the cost of the copper rod is to use recycled copper such as smelting waste copper wire as raw materials, but the recycled copper rod is used as raw mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08C22C1/03C22C1/06B22D11/14H01B5/02
CPCC22F1/08B22D11/145C22C1/03C22C1/06H01B5/02
Inventor 吴仁杰景宝玺杨胜彬李和莲
Owner JINYUAN ELECTRIC GRP
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