Method for producing oxygen-free copper rod from secondary copper

An oxygen-free copper rod and regenerated copper technology, which is applied to the improvement of process efficiency and metal rolling, can solve the problems of harsh working conditions, heavy physical labor, and low production efficiency, and achieve small physical labor and low cost , the effect of improving work efficiency

Active Publication Date: 2013-05-22
绵阳铜鑫铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing oxygen-free copper rod manufacturing method that cannot use recycled copper as raw material, high produc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for producing an oxygen-free copper rod with recycled copper, comprising the following steps:

[0040] A. Throw the recycled copper into the furnace, heat and melt it;

[0041] B. Refining to remove metal impurities;

[0042] C. Reduction of natural gas to obtain pure copper;

[0043] D. Copper is produced after adding rare earth and composite deoxidizer;

[0044] E. Casting, continuous casting and rolling to obtain oxygen-free copper rods.

[0045] This embodiment mainly provides a method for producing oxygen-free copper rods from regenerated copper by using natural gas reduction instead of wood-inserting reduction, which mainly solves the problems of high production cost and low production efficiency that the traditional up-drawing method cannot use regenerated copper as raw material. And overcome the defects that the reduction of inserted wood destroys the environment, the cost is high, the amount of physical labor is large, and the working condition...

Embodiment 2

[0048] In this example, step A is optimized on the basis of Example 1. After raising the furnace temperature to 1300°C, the regenerated copper is put into the furnace. Finally, raise the furnace temperature to 1230°C to melt the regenerated copper. When the regenerated copper is melted, the volume ratio of air volume to fuel is kept at 6:4, which speeds up the melting process of the regenerated copper.

Embodiment 3

[0050] In this embodiment, step B is optimized on the basis of the above-mentioned embodiments. Low-sulfur coke is added to the furnace for the first refining and slag removal, and then quartz, phosphor copper or boron oxide is added to the furnace for the second refining. Slagging after refining, final addition of lime and / or soda to the furnace, or lime and / or soda, Fe 2 o 3 After the third refining with quartz, the slag is removed. Three times of slag removal can remove as much metal impurities in copper water as possible.

[0051] The first refining is mainly used to remove zinc from copper water. The boiling point of zinc is 906 ℃. During refining, most of the zinc volatilizes in the form of metal during the melting stage, and then is oxidized to ZnO by the oxygen in the furnace gas, which is discharged with the furnace gas and collected in the dust collection system. The rest of the zinc It is oxidized to ZnO in the early stage of oxidation, and forms zinc silicate (2...

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Abstract

The invention discloses a method for producing an oxygen-free copper rod from secondary copper, which comprises the following steps of: (A) feeding the secondary copper into a furnace, and heating for melting; (B) refining to remove metal impurities; (C) reducing with natural gas to obtain pure copper; (D) adding rare earth and a complex deoxidizer and then outputting copper; and (E) casting, and performing continuous casting and rolling to obtain an oxygen-free copper rod. Compared with a traditional up-draw process, the method disclosed by the invention can adopt the easily available secondary copper as a raw material for production and can process a great quantity of secondary copper once, and overcomes the shortcomings of high production cost and low production efficiency of the up-draw process adopting secondary copper as raw material; natural gas reduction replaces poling, thereby being more environment-friendly and ensuring lower cost; and moreover, the labor capacity is small, and the defect of bad working condition in poling is overcome.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for producing an oxygen-free copper rod with recycled copper. Background technique [0002] Copper is an important non-ferrous metal widely used in various fields. With the development of science and technology, various fields have put forward higher and higher requirements for the purity of copper. Oxygen-free copper rod is pure copper that does not contain oxygen or any deoxidizer residue, and is widely used in the manufacture of electrical cables. [0003] The existing oxygen-free copper rod manufacturing method is the upward drawing method, and the quality of the oxygen-free copper rod produced by this method is stable. However, there is no refining process in the up-citing industrial frequency furnace, and it cannot smelt scrap copper wires and raw red miscellaneous copper. The upward induction method has high requirements on the raw material copper, and the product...

Claims

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Application Information

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IPC IPC(8): C22B15/14C22B7/00B21B1/46
CPCY02P10/20
Inventor 俞建秋陈伟刘汉玖孙淑锐杨钊黄伟萍黄勇泉柏茂田张代强
Owner 绵阳铜鑫铜业有限公司
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