A kind of low-oxygen copper smelting and crystallization method

A low-oxygen copper and crystallization technology, applied in the field of non-ferrous metallurgy, can solve the problems of poor conductivity, easy breakage, low tensile strength, etc., and achieve the effects of reducing impurity components, good desulfurization, and reducing impurity content

Active Publication Date: 2019-03-22
安徽金林科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of low-oxygen copper in the prior art, such as poor electrical conductivity, low tensile strength, and easy broken ends, and to provide a method for smelting and crystallizing low-oxygen copper, which helps to reduce the oxygen content in copper products , improve the tensile strength and electrical conductivity of low-oxygen copper, and the present invention uses secondary copper resources as processing raw materials, which can effectively reduce production costs

Method used

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  • A kind of low-oxygen copper smelting and crystallization method
  • A kind of low-oxygen copper smelting and crystallization method
  • A kind of low-oxygen copper smelting and crystallization method

Examples

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Embodiment 1

[0046] Such as figure 1 As shown, a method for smelting and crystallizing low-oxygen copper in this embodiment comprises the following steps:

[0047] Step 1, the melting of raw materials comprises the following operations:

[0048] 1. Feeding: Use 90% waste motor wires and 10% bright copper to mix and pack into 60-100kg square raw materials. Use an automatic feeding machine to add the raw materials into the copper melting furnace, and cover the surface of the raw materials with a layer of broken glass. The mass ratio of glass to raw material is 1:65.

[0049] The waste motor wires in this embodiment come from various types of waste motors, and before the waste motor wires are put into the furnace, they are firstly treated to remove the paint film to remove surface impurities. Mixing waste motor wires with bright copper as raw materials, on the one hand, the waste motor wires are used for secondary use of waste copper resources, which reduces production costs. On the other h...

Embodiment 2

[0084]A method for smelting and crystallizing low-oxygen copper, which is basically the same as in Example 1, except that in step 1 of this example, 95% waste motor wires and 5% bright copper are used as raw materials for mixing and packaging, and the mass ratio of glass to raw materials is 1:75, natural gas flow is 780m 3 / h, the temperature of molten copper in the copper melting furnace reaches 1200°C; the casting temperature of the copper liquid in step 2 is controlled at 1110°C, and the temperature of the crystallization wheel 2 is controlled at 120°C.

[0085] In the present embodiment, the inner cooling pipe 3 includes a front cooling section, a middle cooling section and a rear cooling section, and the inlet water pressure of the front cooling section, the middle cooling section and the rear cooling section is 8kg / cm 2 ; The outer cooling pipe 4 includes a front cooling section and a rear cooling section, and the inlet water pressure of the front cooling section and the...

Embodiment 3

[0089] A method for smelting and crystallizing low-oxygen copper, which is basically the same as in Example 1, except that in Step 1 of this example, 93% waste motor wires and 7% bright copper are used as raw materials for mixing and packaging, and the mass ratio of glass to raw materials is 1:70, natural gas flow is 800m 3 / h, the temperature of molten copper in the copper melting furnace reaches 1300°C; the casting temperature of the copper liquid in step 2 is controlled at 1120°C, and the temperature of the crystallization wheel 2 is controlled at 110°C.

[0090] In this embodiment, the inner cooling pipe 3 includes a front cooling section, a middle cooling section and a rear cooling section, and the inlet water pressure of the front cooling section, the middle cooling section and the rear cooling section is 7.5kg / cm 2 ; The outer cooling pipe 4 includes a front cooling section and a rear cooling section, and the inlet water pressure of the front cooling section and the rea...

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Abstract

The invention discloses a low-oxygen copper smelting crystallization method, and belongs to the field of nonferrous metallurgy. The low-oxygen copper smelting crystallization method comprises the following steps that firstly, a raw material is molten, a waste motor wire and bright copper are mixed as the raw material, the surface of the raw material is covered with broken glass, natural gas is introduced to be used as a heat source melting raw material, oxidation and reduction treatment is carried out, and finally sundries on the surface of copper liquid are dug out; and secondly, the copper liquid is cast, the copper liquid enters a crystallization wheel through a casting ladle for cooling crystallization to form a copper cast blank, the copper cast blank is guided out of a blank drawing opening of the crystallization wheel and fed into a rear procedure through a rear conveying mechanism, and the copper cast blank is rolled and cooled and is finally machined into a low-oxygen copper material. Low-oxygen copper produced through the process of the method is low in specific resistance, extremely low in oxygen content, excellent in electric conductivity and good in ductility performance; the phenomenon of end breaking is not prone to happening during subsequent wire drawing treatment; and the production cost is low, and the enterprise production benefits are improved.

Description

technical field [0001] The invention relates to the technical field of nonferrous metallurgy, in particular to a low-oxygen copper smelting crystallization method. Background technique [0002] Copper is an important non-ferrous metal, which is widely used in various industrial sectors because of its excellent comprehensive properties, such as electrical conductivity, thermal conductivity, corrosion resistance and good processability. The existence of a very small amount of impurities such as oxygen, lead, antimony, tin, etc. will seriously affect the conductivity and other properties of copper, so different fields have strict requirements on the purity of copper. Low-oxygen copper rods are favored by the market and widely used because of their high purity, low oxygen content and less impurities. [0003] The production of existing low-oxygen copper rods mainly adopts the continuous casting and rolling process. After the raw copper is melted, oxidized, reduced, and copper i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/14B22D11/06
CPCB22D11/0611B22D11/0682C22B15/0052
Inventor 金权扬
Owner 安徽金林科技股份有限公司
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